LM53625xQEVM and LM53635xQEVM
User's Guide
Literature Number: SNVU526
May 2016
Contents
1
2
3
4
5
6
7
8
2
Introduction ......................................................................................................................... 3
Technical Specification EVM Board ........................................................................................ 4
Schematics ......................................................................................................................... 5
Board Layout ....................................................................................................................... 7
Operation and Test Setup .................................................................................................... 11
...............................................................................................
5.1
Efficiency Measurement
5.2
Measure Load Transient ............................................................................................... 12
11
5.3
Measure EMI ............................................................................................................ 12
Posts, Probes, and Jumpers ................................................................................................ 13
6.1
VIN1 and GND1 Posts ................................................................................................. 13
6.2
VOUT and GND Posts ................................................................................................. 13
6.3
IN+ and IN- Posts ....................................................................................................... 13
6.4
EN and GND2 Probe ................................................................................................... 13
6.5
VINs, VOUTs, and GNDs Probe ...................................................................................... 13
6.6
BIAS and GNDS Probe ................................................................................................ 13
6.7
RESET and GND3 Probe.............................................................................................. 14
6.8
SYNC and GND3 Probe ............................................................................................... 14
6.9
Jumper J1................................................................................................................ 14
6.10
Jumper J2................................................................................................................ 14
6.11
Jumper J3................................................................................................................ 14
Bill of Materials .................................................................................................................. 14
Efficiency and Line- and Load-Regulation ............................................................................. 16
8.1
Load Transients ......................................................................................................... 17
8.2
Conducted EMI.......................................................................................................... 17
Table of Contents
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User's Guide
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LM53625xQEVM and LM53635xQEVM User's Guide
1
Introduction
The LM53635xEVM is specifically designed for automotive applications, providing a fixed output voltage of
5 V, 3.3 V, or an adjustable output voltage at 3.5-A continuous load. The LM53625xEVM is implemented
using the same board and components but with or an IC with current limit set for 2.5 A maximum
continuous load.
Figure 1. LM53625xQEVM and LM53635xQEVM Evaluation Board – Top View
All aspects of the LM53625xQEVM and LM53635xQEVM are optimized for the automotive market. An
input voltage range to 36 V eases input surge protection design. Exceptional dropout performance allows
the elimination of a boost stage in many designs for start/stop applications. An open drain RESET output,
with filtering and Power-GOOD delay, provides a true indication of system status. This feature negates the
requirement for additional supervisory circuitry, saving cost, and board space. Seamless transition
between PWM and PFM operation AUTO MODE, along with a low quiescent current, ensures high
efficiency at all loads. The Texas Instruments LM53625QEVM and LM53635xQEVM helps to evaluate the
operation and performance of the LM53625x and LM53635x and is available for order in five variants. See
Table 1 of orderable EVM variants and configuration.
Table 1. Orderable EVM Variants and Configuration for LM53625 and LM53635
EVM VARIANT
EVM ORDERABLE
NAME
IC U1
CONTINUOUS
LOAD
OUTPUT
VOLTAGE
SPREAD
SPECTRUM
001
LM536253QEVM
LM536253QRNLRQ1
2.5 A
3.3 V Fixed
—
002
LM53635AQEVM
LM53635AQRNLRQ1
3.5 A
5 V Adjusted
—
003
LM53635LQEVM
LM53635LQRNLRQ1
3.5 A
5 V Fixed
Yes
004
LM53635MQEVM
LM53635MQRNLRQ1
3.5 A
5 V Adjusted
Yes
005
LM53635NQEVM
LM53635NQRNLRQ1
3.5 A
3.3 V Fixed
Yes
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Technical Specification EVM Board
2
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Technical Specification EVM Board
Table 2 shows specifications for the LM53625xQEVM and LM53635xQEVM board.
Table 2. Technical Specification
BOARD SIZE
4000 × 3000 mil
101 mm × 76 mm
76 cm2
4-Layer FR4 PCB
Top Layer1 and Bottom Layer2
Mid Layer2 and Mid Layer3
2.8 mil 2 oz. Cu
1.4 mil 1 oz. Cu
860 mil × 490 mil
22 mm × 12.5 mm
2.75 cm2
VIN1 and GND1
IN+ / IN-
Power Supply Input
Power Input for EMI Test
typical 13.5 V (range 3.5 to 36 V)
transient typical 13.5 V
VOUT and GND
Power Output to Load
typical 3.3 V or 5 V
J1 FPWM pin
J2 ENABLE pin
J3 RESET pin
Auto Mode or Forced PWM
Enable LM536325x and LM536335x
Open drain output
Set – Default [AUTO-MODE]
Set – Default [EN-VIN]
Optional - [RESET-VOUT]
GNDs, GND2 and GND3
EN
VINs
VOUTs
BIAS
RESET
SYNC
Sense GND Points
Enable Pin Voltage
Input Voltage Sense
Output Voltage Sense
BIAS Voltage Sense
RESET output
Switch node SYNC input
If J2[EN-VIN] then VIN1 3.5 - 36 V
Sense VIN1 3.5 to 36 V
Sense VOUT typical 3.3 V or 5 V
Sense BIAS typical 3.3 V or 5 V
If J3 [RESET-VOUT] then VOUTs
external sync frequency source
BOARD LAYER
SOLUTION SIZE
POWER INPUT
Power Output:
JUMPERS
TEST POINTS
4
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Schematics
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3
Schematics
LM53635 3.5A
SV601262A Evaluation Board
U1
VIN
VINs
4
14
C1
10µF
Cin_hf1
0.047µF
C2
10µF
Cin_hf2
0.047µF
Cvcc
4.7µF 1
AGND
AVIN
CBOOT
EN
GND
GND
VIN
SW
PVIN2
BIAS
VCC
HTSW-103-07-G-S
EN Jumper
3
2
1
EN
3
2
1
R3
SH-J1
GND
16
SYNC
3
J1
100k
HTSW-103-07-G-S
J2
FPWM
EN
RESET
FPWM
AGND
SYNC
PGND1
PGND1
PGND1
PGND1
SYNC
FPWM Jumper
SH-J2
18
R6
100k
GND2
17
BOOT
9
SW
PGND2
PGND2
PGND2
PGND2
NC
GND3
GND
GND
L1
19 RESET
Co4
0.1µF
BIAS Cbias
Co1
22µF
Co2
22µF
Co3
47µF
0.1µF
20
GND
GND
AGND
GNDs
AGND
10
11
12
13
EVM Variants Table
Reset Jumper
Variant
SH-J3
J3
Vout
3.3V fixed
LM536253QEVM 3.3V / 2.5A w/o SS
002
LM53635AQEVM ADJ / 3.5A w/o SS
5.0V adjust.
003
LM53635LQEVM 5.0V / 3.5A with SS
5.0V fixed
NTG
004
LM53635MQEVM ADJ / 3.5A with SS
5.0V adjust.
Net-Tie
005
LM53635NQEVM 3.3V / 3.5A with SS
3.3V fixed
GND
RESET
RESET
HTSW-102-07-G-S
Label Text
001
GND
AGND
VOUTs
VOUT
3.0
21 FB
5
6
7
8
VOUT
2.2µH
VOUT
Rbias
22 BIAS
LM53635RNL
GND
Cb
0.47µF
PVIN1
FB
EN
2
1
2
15
VIN
R7
VOUT
100k
GND
Copyright © 2016, Texas Instruments Incorporated
Figure 2. Fixed - Output Voltage Option Schematic
The fixed voltage option has an internal resistor divider and FB pin that connects directly to Cout capacitor.
NOTE: Cvcc and Cbias must connect directly to pin 20 AGND.
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Schematics
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LM53635 3.5A
SV601262A Evaluation Board
U1
VIN
VINs
4
14
C1
10µF
Cin_hf1
0.047µF
C2
10µF
Cin_hf2
0.047µF
Cvcc
4.7µF 1
AGND
AVIN
CBOOT
EN
GND
GND
VIN
SW
PVIN2
BIAS
VCC
HTSW-103-07-G-S
EN Jumper
3
2
1
EN
3
2
1
R3
SH-J1
GND
16
SYNC
3
J1
100k
HTSW-103-07-G-S
J2
FPWM
EN
RESET
FPWM
AGND
SYNC
PGND1
PGND1
PGND1
PGND1
SYNC
FPWM Jumper
SH-J2
18
R6
100k
GND2
17
BOOT
9
SW
PGND2
PGND2
PGND2
PGND2
NC
GND3
GND
GND
L1
3.0
21 FB
19 RESET
VOUT
RFBT
BIAS Cbias
RFBB
12.1k
Co1
22µF
Co2
22µF
Co3
47µF
15pF
CFF
AGND
GND
GND
GNDs
AGND
10
11
12
13
EVM Variants Table
Reset Jumper
Variant
SH-J3
GND
RESET
RESET
HTSW-102-07-G-S
R7
VOUT
100k
NTG
Net-Tie
AGND
Co4
0.1µF
49.9k
AGND
J3
GND
VOUTs
0.1µF
20
5
6
7
8
VOUT
2.2µH
VOUT
Rbias
22 BIAS
LM53635RNL
GND
Cb
0.47µF
PVIN1
FB
EN
2
1
2
15
VIN
Label Text
Vout
001
LM536253QEVM 3.3V / 2.5A w/o SS
3.3V fixed
002
LM53635AQEVM ADJ / 3.5A w/o SS
5.0V adjust.
003
LM53635LQEVM 5.0V / 3.5A with SS
5.0V fixed
004
LM53635MQEVM ADJ / 3.5A with SS
5.0V adjust.
005
LM53635NQEVM 3.3V / 3.5A with SS
3.3V fixed
GND
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Figure 3. Adjustable - Output Voltage Option Schematic
Adjustable option uses external resistor divider to define output voltage. The CFF capacitor can be adjusted to make the feedback loop response
faster for load transient. By lowering the total resistance of the feedback divider the noise immunity can be increased.
NOTE: To minimize noise coupling into the feedback pin, the maximum resistance recommended in the feedback resistors RFBB and RFBT is 50
kΩ. The feedback resistors RFBB and RFBT must be placed as close to the FB pin as possible, and RFBB must be grounded to AGND
pin.
6
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Board Layout
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4
Board Layout
The LM53635xQEVM uses a four-layer PCB stack-up design. Top Layer 1 and Bottom Layer 4 are
implemented using 2 oz. copper for optimized heat transfer and dissipation. Mid Layer 2 and Mid Layer 3
utilize 1 oz. copper. Total PCB thickness is 61 mil (1.55 mm).
Figure 4. Four-Layer PCB Stack-Up
The overall EVM PCB board size dimension is 4000 mil × 3000 mil (101 mm × 76 mm) with a top surface
area of 76 cm2. All vias on the PCB are constructed using 8-mil drill thru-hole with 16-mil pad size.
Figure 5 to Figure 8 shows the PCB Layout for each Cu Layer. Top Layer1 and Bottom Layer4 are
constructed using large filled Cu areas connected to GND. This is done to improve thermal performance
as well as improve overall EMI performance. Mid Layer 2 is constructed using a large GND plane as well.
The intention here is to minimize loop inductance by placing metal right under the Top Layer 1 traces
minimizing the cross section of current loops. Mid Layer 3 is mainly used to route non-critical signal traces
to the IC.
NOTE: The PCB board layout is not fully optimized to use for final applications, but gives a good
starting point. The layout can be simplified and optimized by eliminating features included for
evaluation purposes such as measurement sense lines, jumper connections and features
unused in a particular application such as the feedback resistor divider for fixed voltage
options.
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Board Layout
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Figure 5. PCB Layout Top Layer 1 – Top View
Figure 6. PCB Layout Mid Layer 2 GND Plane – Top View
8
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Figure 7. PCB Layer Mid Layer 3 – Top View
Figure 8. PCB Layer Bottom Layer 4 – Flipped View (as Seen From Bottom of Board)
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Board Layout
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Figure 9. PCB Layer 5 – Dimensions
Figure 10. PCB Layer 7 Composite Top
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Operation and Test Setup
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Figure 11. PCB Layer 6 Composite Bottom
5
Operation and Test Setup
5.1
Efficiency Measurement
1. Connect power supply to posts VIN1 and GND1 and make sure the power supply provides sufficient
current.
NOTE: There is no reverse polarity protection or fuse on the evaluation board.
2. Connect electronic load to posts VOUT and GND. For all power wires use preferable twisted lab wires.
If the power supply wires are very long > 50 cm please solder additional 470 µF, 50 V bulk capacitor to
posts VIN1 and GND1. Always use sufficient power wires and separate measurement sense wires.
NOTE: These sense lines are not designed to carry power.
3. To accurately sense input and output voltage use the test points VINs, VOUTs, and GNDs.
Alternatively sense wires can be soldered directly over input capacitors C1 or C2 and the output
capacitors C01 or C02.
4. Make sure the IC is enabled by having jumper J2 set to [EN-VIN] and check test point EN is driven
high. While measuring Iq (unloaded input current) remove all the input and output voltage probes that
are most likely causing additional current draw.
NOTE: If the jumper J1 is set to [MODE-FPWM] the part will have a lower efficiency at light loads by
maintaining the 2.1-MHz switch frequency. To measure the highest light load efficiency place
the Jumper J1 in [AUTO-MODE].
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Operation and Test Setup
5.2
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Measure Load Transient
1. Connect power supply to posts VIN1 and GND1 and make sure the power supply can provide
sufficient peak current.
NOTE: There is no reverse polarity protection or fuse on the evaluation board.
2. Connect transient load to posts VOUT and GND. For all power wires use preferable twisted lab wires.
If the power supply wires are very long > 50 cm; solder additional 470 µF, 50 V bulk capacitor to posts
VIN1 and GND1. Use sufficient power wires to avoid voltage drops and use short sense probe
connection for the measurement.
3. To accurately sense the output voltage, the scope probe should be placed directly over the output
capacitors C01 or C02. Make sure to connect scope probe GND ring directly to the output capacitor
GND pad for minimal ground loop. Ground loops can introduce ringing in observed waveforms which is
an artifact; not present on the PCB. Alternatively use differential probe over output capacitors C01 or
C02. Do not use wires to differential probe and always probe directly with shortest possible pins.
Make sure the IC is enabled by having jumper J2 set to [EN-VIN] and check test point EN is driven
high and not drooping during the load transient.
5.3
Measure EMI
1. Connect power supply cable from LISN to posts IN+ and IN- and make sure the board is placed 5 cm
above the table.
NOTE: The length of the LISN cable to VIN+/VIN- should be between 20 cm to 40 cm for conducted
EMI CISPR 25.
2. Connect resistive load directly to posts VOUT and GND. Use extremely short leads.
NOTE: To accurately measure EMI make sure the table has good ground connection to the
chamber, connect the battery GND cable to ground table, and do not touch the board and
setup or close the switch node. The board has a very effective 3-stage EMI filter where the
common mode choke is not assembled by default. If the common mode choke is added,
remove the bypass resistors R1 and R2.
EMI FILTER
IN+
IHLP2020CZER2R2M11
LCM
IN+
LF1 2.2µH
IN-
0
VIN1
CF2
4.7µF
CHF2
0.1µF
Cbulk
100µF
1
4
CF1
4.7µF
VIN
600 ohm
2
3
0
CHF1
0.1µF
IN-
4 A 2220
FB1
R1
R2
GND
GND
GND1
when laying out the board, keep the EMI fi lter away from Switch Node.
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Figure 12. 3-Stage EMI Filter Schematic
12
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Figure 13. Position of the EMI Filter Components on PCB – Bottom Layer
6
Posts, Probes, and Jumpers
6.1
VIN1 and GND1 Posts
Standard input posts from power supply to operate EVM. The maximum input voltage is 36 V with 42 V
absolute maximum transient.
6.2
VOUT and GND Posts
Standard output posts to load. Use sufficient lab cables and preferable twist them to reduce inductive
parasitic of lab cables. The typical output voltage is 5 V or 3.3 V.
6.3
IN+ and IN- Posts
Standard Input posts for EMI Measurements so the IC is operated with EMI input Filter. By default there is
a 2-stage filter assembled with a wire wound Inductor PI-Filter for low frequency filtering followed by stage
utilizing a ferrite bead for high frequency filtering. If one wishes to measure a setup with a common mode
choke; add the choke and remove bypass resistors R1 and R2.
6.4
EN and GND2 Probe
EN and GND2 probe can be used to measure the enable voltage or drive it from external source. If an
external source is used make sure to remove jumper J2. By default J2 jumper is set EN to VIN.
6.5
VINs, VOUTs, and GNDs Probe
VINs and VOUTs are sense points for input and output voltage.
NOTE: Do not use for power supply or load.
These probe points are intended for use as kelvin sense point for static measurements like efficiency or
line- or load regulation. For dynamic measurements please measure directly over the input capacitors C1
and C2 or directly over the output capacitor CO1 and CO2.
6.6
BIAS and GNDS Probe
BIAS probe senses the bias voltage to the IC. Bias voltage is provided from the output voltage of the IC
over Rbias = 3 Ω resistor. An external Bias supply voltage can be provided by removing Rbias located on
bottom side of PCB to disconnect IC output voltage as source for bias.
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Posts, Probes, and Jumpers
6.7
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RESET and GND3 Probe
RESET provides an accurate power good signal with release delay. By default jumper J3 is set to VOUT
and pulls the RESET pin to VOUT through a 100-kΩ resistor. RESET is an open drain output so it can be
pulled to other external voltage levels by removing jumper J3.
6.8
SYNC and GND3 Probe
By default the IC is running with internal oscillator at 2.1 MHz. There are IC options available with and
without internal spread spectrum modulation. Over the SYNC pin, an external function generator can be
connected to take control of the LM53625 and LM53635’s clock, changing switching frequency. SYNC
function is responsive enough to be used for custom frequency modulation techniques.
6.9
Jumper J1
Jumper J1 sets light load operation mode of the IC. If set to [AUTO-MODE] when lightly loaded the IC
goes automatically into PFM mode operation with fewer switching pulses and higher efficiency. The IC can
be set into forced PWM mode (jumper position is marked FPWM) to operate with a constant switching
frequency over the entire load range. This forced FPWM mode of operation will have best load transient
behavior as well because there is no operation mode change during load transient steps.
6.10
Jumper J2
Jumper J2 enables the IC. By default it is set to [EN-VIN] and pulls the enable pin through a 100-kΩ
resistor to Vin. If an external source drives the EN pin then remove jumper J2 and use probe points EN
and GND2 or use a 3-pin wire connector directly plugged over J2.
6.11
Jumper J3
Jumper J3 pulls the open drain RESET output to VOUT through a 100-kΩ resistor. If another RESET
output level is needed use probe point RESET and pullup resistor to external reference voltage and
remove jumper J3.
7
Bill of Materials
Table 3. Bill of Materials
DESIGNATOR
QTY
BIAS, EN, RESET, SYNC
4
C1, C2
2
Cb
1
DESCRIPTION
PART NUMBER
Test Point, Miniature, White, TH
5002
10 µF
CAP, CERM, 10 µF, 50 V, ±10%, X5R, 1206_109
GRM31CR61H106KA12L
0.47 µF
CAP, CERM, 0.47 µF, 25 V, ±10%, X5R, 0603
GRM188R61E474KA12D
GCM188R71C104KA37J
Cbias, Co4
2
0.1 µF
CAP, CERM, 0.1 µF, 16 V, ±10%, X7R, AEC-Q200 Grade
1, 0603
Cbulk
1
100 µF
CAP, Aluminum Polymer, 100 µF, 50 V, ±20%, 0.025 Ω,
AEC-Q200 Grade-2
HHXB500ARA101MJA0G
CF1, CF2
2
4.7 µF
CAP, CERM, 4.7 µF, 50 V, ±20%, X7R, AEC-Q200 Grade
1, 1210
CGA6P3X7R1H475M250AB
CHF1, CHF2
2
0.1 µF
CAP, CERM, 0.1 µF, 16 V, ±10%, X7R, AEC-Q200 Grade
1, 0603
CGJ3E2X7R1C104K080AA
Cin_hf1, Cin_hf2
2
0.047 µF
CAP, CERM, 0.047 µF, 50 V, +/- 10%, X7R, 0603
GRM188R71H473KA61D
Co1, Co2
2
22 µF
CAP, CERM, 22 µF, 10 V, ±10, X7R, 1206
GRM31CR71A226KE15L
Co3
1
47 µF
CAP, CERM, 47 µF, 10 V, ±10, X7R, 1210
GRM32ER71A476KE15L
GCM21BR71C475KA73L
Cvcc
1
4.7 µF
CAP, CERM, 4.7 µF, 16 V, ±10%, X7R, AEC-Q200 Grade
1, 0805
FB1
1
600 Ω
Ferrite Bead, 600 Ω at 100 MHz, 4 A, 2220
HI2220P601R-10
GND, GND1, IN+, IN-,
VIN1, VOUT
6
Double
Terminal, Turret, TH, Double
1502-2
GND2, GND3, GNDs
3
Black
Test Point, Miniature, Black, TH
5001
Machine Screw, Round, #4-40 × 1/4, Nylon, Philips
panhead
NY PMS 440 0025 PH
H1, H2, H3, H4
14
VALUE
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Bill of Materials
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Table 3. Bill of Materials (continued)
DESIGNATOR
QTY
DESCRIPTION
PART NUMBER
H5, H6, H7, H8
4
VALUE
Standoff, Hex, 0.5"L #4-40 Nylon
1902C
J1, J2
2
Header, 100 mil, 3×1, Gold, TH
HTSW-103-07-G-S
J3
1
Header, 100 mil, 2×1, Gold, TH
HTSW-102-07-G-S
L1
1
Inductor, Shielded, Powdered Iron, 2.2 µH, 10.2 A,
0.00941 Ω, SMD
IHLP3232DZER2R2M11
LCM
0
Coupled inductor, 5 A, 0.01 Ω, SMD
ACM9070-701-2PL-TL01
LF1
1
2.2 µH
Inductor, Shielded Drum Core, Powdered Iron, 2.2 µH, 5.5
A, 0.025 Ω, SMD
IHLP2020CZER2R2M11
R1, R2
2
0Ω
RES, 0Ω, 5% 0.25 W, 1206
CRCW12060000Z0EA
R3, R6, R7
3
100 k
RES, 100 K, 5%, 0.1 W, 0603
CRCW0603100KJNEA
Rbias
1
3Ω
RES, 3 Ω, 5%, 0.1 W, 0603
CRCW06033R00JNEA
SH-J1, SH-J2, SH-J3
3
1×2
Shunt, 100 mil, Gold plated, Black
969102-0000-DA
VINs
1
Test Point, Miniature, Red, TH
5000
VOUTs
1
Test Point, Miniature, Orange, TH
5003
2.2 µH
Variant 001
LM536253QEVM Fixed 3.3 V, 2.5 A Without Spread Spectrum
U1
1
RFBB
0
DNP
RFBT
1
0Ω
CFF
0
DNP
Variant 002
LM536253QRNLRQ1
2.5/3.5 A Synchronous Buck Regulator for Automotive
Applications, RNL0022A
CRCW04020000Z0ED
LM53635AQEVM Adjustable 5 V, 3.5 A Without Spread Spectrum
U1
1
RFBB
1
RFBT
1
CFF
1
2.5/3.5 A Synchronous Buck Regulator for Automotive
Applications, RNL0022A
LM53635AQRNLRQ1
12.1 k
RES, 12.1 k, 1%, 0.063 W, 0402
CRCW040212K1FKED
49.9 k
RES, 49.9 k, 1%, 0.063 W, 0402
CRCW040249K9FKED
15 pF
CAP, CERM, 15 pF, 50 V, ±5%, C0G/NP0, 0402
GRM1555C1H150JA01D
Variant 003
LM53635LQEVM Fixed 5 V, 3.5 A With Spread Spectrum
U1
1
RFBB
0
DNP
RFBT
1
0Ω
CFF
0
DNP
Variant 004
2.5/3.5A Synchronous Buck Regulator for Automotive
Applications, RNL0022A
LM53635LQRNLRQ1
RES, 0 Ω, 5%, 0.063 W, 0402
CRCW04020000Z0ED
LM53635MQEVM Adjustable 5 V, 3.5 A With Spread Spectrum
U1
1
RFBB
1
RFBT
1
CFF
1
2.5/3.5A Synchronous Buck Regulator for Automotive
Applications, RNL0022A
LM53635MQRNLRQ1
12.1 k
RES, 12.1 k, 1%, 0.063 W, 0402
CRCW040212K1FKED
49.9 k
RES, 49.9 k, 1%, 0.063 W, 0402
CRCW040249K9FKED
15 pF
CAP, CERM, 15 pF, 50 V, ±5%, C0G/NP0, 0402
GRM1555C1H150JA01D
Variant 005
LM53635NQEVM Fixed 3.3 V, 3.5 A With Spread Spectrum
U1
1
RFBB
0
DNP
RFBT
1
0Ω
CFF
0
DNP
SNVU526 – May 2016
Submit Documentation Feedback
2.5/3.5 A Synchronous Buck Regulator for Automotive
Applications, RNL0022A
2.5/3.5A Synchronous Buck Regulator for Automotive
Applications, RNL0022A
LM53635NQRNLRQ1
RES, 0 Ω, 5%, 0.063 W, 0402
CRCW04020000Z0ED
LM53625xQEVM and LM53635xQEVM User's Guide
Copyright © 2016, Texas Instruments Incorporated
15
Efficiency and Line- and Load-Regulation
8
www.ti.com
Efficiency and Line- and Load-Regulation
The variant of the board LM53635LQEVM is used for all measurements and curves in Figure 14 to
Figure 23.
100%
100%
90%
95%
80%
90%
85%
Efficiency
Efficiency
70%
60%
50%
40%
20%
10%
1E-5
75%
5.5Vin
8Vin
12Vin
13.5Vin
18Vin
36Vin
70%
65%
8Vin
12Vin
13.5Vin
18Vin
30%
80%
60%
55%
50%
0.0001
0.001
0.01
Output Current (A)
VOUT = 5 V
0.10.2 0.5 1 2 34
0
AUTO
1
VOUT = 5 V
Figure 14. LM53635LQEVM Efficiency
1.5
2
Output Current (A)
2.5
3.5
D006
FPWM
5.05
8Vin
12Vin
18Vin
36Vin
5.025
5
Output Voltage (V)
5.06
5.04
5.02
5
4.975
4.95
4.925
4.9
5.5Vin
8Vin
12Vin
13.5Vin
18Vin
36Vin
4.875
4.85
4.98
4.825
4.96
4.775
4.8
0
0.5
VOUT = 5 V
1
1.5
2
Output Current (A)
2.5
3
3.5
0
0.5
D003
AUTO
VOUT = 5 V
Figure 16. LM53635LQEVM Load and Line Regulation
16
3
Figure 15. LM53635LQEVM Efficiency
5.08
Output Voltage (V)
0.5
D001
1
1.5
2
Output Current (A)
2.5
3
3.5
D007
FPWM
Figure 17. LM53635LQEVM Load and Line Regulation
LM53625xQEVM and LM53635xQEVM User's Guide
Copyright © 2016, Texas Instruments Incorporated
SNVU526 – May 2016
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Efficiency and Line- and Load-Regulation
www.ti.com
8.1
Load Transients
VOUT = 5 V
IOUT = 0 mA to 3.5 A,
TR = TF = 1 µs
FPWM
Figure 18. LM53635LQEVM Load Regulation
8.2
VOUT = 5 V
IOUT = 10 mA to 3.5 A,
TR = TF = 1 µs
AUTO
Figure 19. LM53635LQEVM Load Transients
Conducted EMI
Figure 20. Conducted EMI Setup - Front View
SNVU526 – May 2016
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Figure 21. Conducted EMI Setup - Side View
LM53625xQEVM and LM53635xQEVM User's Guide
Copyright © 2016, Texas Instruments Incorporated
17
Efficiency and Line- and Load-Regulation
www.ti.com
Figure 22. LM53635LQEVM Low Frequency Conducted EMI
Results for 5 Vout With Spread Spectrum. Green-Average
and Yellow-Peak
18
Figure 23. LM53635LQEVM High Frequency Conducted
EMI Results for 5 Vout With Spread Spectrum. GreenAverage and Yellow-Peak
LM53625xQEVM and LM53635xQEVM User's Guide
Copyright © 2016, Texas Instruments Incorporated
SNVU526 – May 2016
Submit Documentation Feedback
STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES
1.
Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or
documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein.
Acceptance of the EVM is expressly subject to the following terms and conditions.
1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms and conditions that accompany such Software
1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.
2
Limited Warranty and Related Remedies/Disclaimers:
2.1 These terms and conditions do not apply to Software. The warranty, if any, for Software is covered in the applicable Software
License Agreement.
2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for any defects that are caused by neglect, misuse or mistreatment
by an entity other than TI, including improper installation or testing, or for any EVMs that have been altered or modified in any
way by an entity other than TI. Moreover, TI shall not be liable for any defects that result from User's design, specifications or
instructions for such EVMs. Testing and other quality control techniques are used to the extent TI deems necessary or as
mandated by government requirements. TI does not test all parameters of each EVM.
2.3 If any EVM fails to conform to the warranty set forth above, TI's sole liability shall be at its option to repair or replace such EVM,
or credit User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the
warranty period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to
repair or replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall
be warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.
3
Regulatory Notices:
3.1 United States
3.1.1
Notice applicable to EVMs not FCC-Approved:
This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit
to determine whether to incorporate such items in a finished product and software developers to write software applications for
use with the end product. This kit is not a finished product and when assembled may not be resold or otherwise marketed unless
all required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product not cause
harmful interference to licensed radio stations and that this product accept harmful interference. Unless the assembled kit is
designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must operate under the authority of
an FCC license holder or must secure an experimental authorization under part 5 of this chapter.
3.1.2
For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:
CAUTION
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.
FCC Interference Statement for Class A EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
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FCC Interference Statement for Class B EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
•
•
•
•
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
3.2 Canada
3.2.1
For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210
Concerning EVMs Including Radio Transmitters:
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.
Concernant les EVMs avec appareils radio:
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concerning EVMs Including Detachable Antennas:
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types
listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated.
Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited
for use with this device.
Concernant les EVMs avec antennes détachables
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
l'émetteur
3.3 Japan
3.3.1
Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に
輸入される評価用キット、ボードについては、次のところをご覧ください。
http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page
3.3.2
Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan may not be certified
by TI as conforming to Technical Regulations of Radio Law of Japan.
If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required by Radio Law of
Japan to follow the instructions below with respect to EVMs:
1.
2.
3.
Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal
Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for
Enforcement of Radio Law of Japan,
Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to
EVMs, or
Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.
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【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて
いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの
措置を取っていただく必要がありますのでご注意ください。
1.
2.
3.
電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用
いただく。
実験局の免許を取得後ご使用いただく。
技術基準適合証明を取得後ご使用いただく。
なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。
上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ
ンスツルメンツ株式会社
東京都新宿区西新宿６丁目２４番１号
西新宿三井ビル
3.3.3
Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ
い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
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4
EVM Use Restrictions and Warnings:
4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT
LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling
or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information
related to, for example, temperatures and voltages.
4.3 Safety-Related Warnings and Restrictions:
4.3.1
User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user
guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and
customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input
and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or
property damage. If there are questions concerning performance ratings and specifications, User should contact a TI
field representative prior to connecting interface electronics including input power and intended loads. Any loads applied
outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible
permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to connecting any
load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.
During normal operation, even with the inputs and outputs kept within the specified allowable ranges, some circuit
components may have elevated case temperatures. These components include but are not limited to linear regulators,
switching transistors, pass transistors, current sense resistors, and heat sinks, which can be identified using the
information in the associated documentation. When working with the EVM, please be aware that the EVM may become
very warm.
4.3.2
EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the
dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.
User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,
affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic
and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely
limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and
liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or
designees.
4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,
state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all
responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and
liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local
requirements.
5.
Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate
as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as
accurate, complete, reliable, current, or error-free.
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6.
Disclaimers:
6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE
DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY
THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.
6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND
CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY
OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD
PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY
INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF
THE EVM.
7.
USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS
LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS AND CONDITIONS. THIS OBLIGATION
SHALL APPLY WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY
OTHER LEGAL THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.
8.
Limitations on Damages and Liability:
8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE,
INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE
TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED
TO, COST OF REMOVAL OR REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES, RETESTING, OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS,
LOSS OF SAVINGS, LOSS OF USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL
BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED.
8.2 Specific Limitations. IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION
ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM
PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER
THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE
OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND
CONDITIONS SHALL NOT ENLARGE OR EXTEND THIS LIMIT.
9.
Return Policy. Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s)
will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in
a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable
order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s),
excluding any postage or packaging costs.
10. Governing Law: These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas,
without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to
these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas.
Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief
in any United States or foreign court.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2015, Texas Instruments Incorporated
spacer
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
performed.
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the
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Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration
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Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support
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harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use
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In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and
requirements. Nonetheless, such components are subject to these terms.
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
have executed a special agreement specifically governing such use.
Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components
which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and
regulatory requirements in connection with such use.
TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.
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