User's Guide
SNVA479B – April 2011 – Revised April 2013
AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
1
Introduction
The LMZ13610/8/6 and LMZ12010/8/6 SIMPLE SWITCHER® power modules are easy-to-use DC-DC
solution capable of driving up to a 10, 8 or 6 ampere load. They are available in an innovative package
that enhances thermal performance and allows for hand or machine soldering. The LMZ13610/8/6 can
accept an input voltage rail between 6V and 36V and the LMZ12010/8/6 can accept an input voltage rail
between 6V and 20V.
The demo board is highly configurable. The output voltage can be adjusted to 5V, 3.3V, 2.5V or 1.2V with
a jumper change. The external soft-start capacitor facilitates a controlled and adjustable startup rise time
of the output. The input voltage UVLO can also be adjusted by changing one resistor.
The LMZ13610 and LMZ12010 family is a reliable and robust solution with the following features: loss-less
cycle-by-cycle valley current limit to protect for over current or short-circuit fault, thermal shutdown, input
under-voltage lockout, and will start up into a pre-biased output.
2
Board Specifications
•
•
•
•
•
•
•
VIN = 6V to 36V (LMZ13610/8/6)
VIN = 6V to 20V (LMZ12010/8/6)
VOUT = 1.2V, 2.5V, 3.3V or 5V (minimum input voltage of 7V required for 5V output)
IOUT = 0 to 10, 8, or 6 Amps
θJA = 9.9 °C / W, θJC = 1.0 °C/W
Designed on four layers; Inner are 1 oz copper; Outer are 2 oz copper.
Measures 2.95" × 3.54" (75 mm × 90 mm) and is 62 mils (1.57 mm) thick of FR4 laminate material
For additional circuit considerations, including additional output voltage options, refer to the Applications
Section of the LMZ13610/8/6 or LMZ12010/8/6 data sheets. For negative output voltage connections, see
AN-2027 Inverting Application for the LMZ14203 SIMPLE SWITCHER Power Module Application Report
(SNVA425).
SIMPLE SWITCHER is a registered trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
SNVA479B – April 2011 – Revised April 2013
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AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
1
Board Specifications
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CIN6
(OPT)
+
CIN2,3,4
CIN5
(OPT)
VOUT
SS
FB
PGND
AGND
VIN
EN
VIN
LMZ Module
VOUT
RENT
CIN1
CO3,4
(OPT)
CO1
CSS
CO2
(OPT)
(OPT)
RFBB
RFB_LP
CFF
TEMP
SENSE
D1
5.1V
(OPT)
RENB
CO5
(OPT)
RFBT_5
RFBT_5b
RFBT_3.3
RFBT_3.3b
RFBT_2.5
RFBT_2.5b
RFBT_1.2
RFBT_1.2b
5Vout
3.3Vout
2.5Vout
RTS
1.2Vout
VOUT SELECT
(J1)
Figure 1. Simplified Schematic
2
AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
SNVA479B – April 2011 – Revised April 2013
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Test Connections
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3
Test Connections
The board should be connected to a power supply and load as shown below in Figure 2. The EN post is
connected to the UVLO circuit on the back of the board. There is a resistive divider implemented on the
board that can be used to establish a precision UVLO level for the board that is currently set to 5.7V. A
common user change to this circuit is to adjust the value of RENT and RENB to adjust the operating
UVLO to that of the target application. Refer to the respective data sheet for calculation. Note that if in the
end application the EN pin voltage does not exceed 5.5V at maximum Vin, then the enable clamp zener
D1 can be omitted. (On revision A of the board the overlay for the zener diode has the cathode and anode
incorrectly labeled) Pull EN low to shutdown the module.
Oscilloscope
J1
ABC
ENABLE
VOUT
VIN
ELECTRONIC
LOAD
POWER SUPPLY
Vin = 6 ± 20
(36)V
Set from 0 to 10 Amperes
MULTI-METER
MULTI-METER
Vout = 5, 3.3,
2.5, 1.2V
GND
Figure 2. Board Connection Diagram
SNVA479B – April 2011 – Revised April 2013
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AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
3
Pin Descriptions
4
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Pin Descriptions
The Demo board is also compatible with the 20-pin edge connector shown in Figure 3. The functionality of
the pins is described in Table 1.
I
I
I
I
VOUT
I
I
I
I
GND
I
VIN
9
10
10
A
B
C
D
E
F
H
J
K
L
TEMP SENSE
8
VOUT SENSE +
7
NC
6
AGND
5
VIN SENSE -
4
VOUT SENSE -
3
AGND
2
EN
1
AGND
VIN SENSE +
I
I
I
I
I
I
I
I
I
I
I
Figure 3. Edge Connector Diagram
Table 1. Pin Descriptions
4
Pin
Name
Description
1, 2, 3
VIN
Input supply — Nominal operating range is from 6V to 20V for the LMZ12010/8/6 and
from 6V to 36V for the LMZ13610/8/6.
4, 5, 6, 7
GND
Power Ground — Electrical path for the power circuits within the module.
8, 9, 10
VOUT
Output Voltage — Regulated 5, 3.3, 2.5 or 1.2V.
A
VIN SENSE +
Positive Kelvin Sense of Input voltage — Tied to VIN pin of the LMZ module.
E
VIN SENSE -
Negative Kelvin Sense of Input voltage — Tied to PGND (EP) of the LMZ module.
L
VOUT SENSE +
Positive Kelvin Sense of Output voltage — Tied to Vout banana jack.
Negative Kelvin Sense of Output voltage — Tied to AGND of the LMZ module.
F
VOUT SENSE -
B, D, H
AGND
J
NC
No Connect — This pin must remain floating, do not ground.
C
EN
Enable — Input to the precision enable comparator of the LMZ Module.
K
TEMP SENSE
AGND Ground — Tied to AGND pin of module.
Connected to top of the Rts temperature sensing resistor (unpopulated). Temperature
measurements can be made by measuring the temperature dependant resistance
between TEMP SENSE and VIN SENSE -. Convert the resistance to temperature with
the following equation: Temperature (C) ≊ 2.6245 × Resistance (Ω) - 262.7
AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
SNVA479B – April 2011 – Revised April 2013
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Adjusting the Output Voltage
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5
Adjusting the Output Voltage
The output voltage of the Demo board is adjusted to either 5V, 3.3V, 2.5V, or 1.2V by moving jumper J1.
For other voltage options, see the datasheet for adjusting the feedback resistors.
6
Optional Components
The Demo board has many options for input and output filtering. CO1, CO2 and CO5 can installed with
47nF or greater ceramic capacitors to further decrease high frequency noise on the output. Similarly, CIN1,
and CIN6 can be installed with 47nF capacitors to provide further high frequency bypass for the input
current.
CIN6
(OPT)
+
CIN2,3,4
CIN5
(OPT)
VOUT
SS
FB
PGND
AGND
VIN
EN
VIN
LMZ Module
VOUT
RENT
CIN1
CO3,4
(OPT)
CSS
CO1
CO2
(OPT)
(OPT)
RFBB
RFB_LP
CFF
TEMP
SENSE
D1
5.1V
(OPT)
RENB
CO5
(OPT)
RFBT_5
RFBT_5b
RFBT_3.3
RFBT_3.3b
5Vout
3.3Vout
RFBT_2.5
RFBT_2.5b
RFBT_1.2
RFBT_1.2b
2.5Vout
RTS
1.2Vout
VOUT SELECT
(J1)
Figure 4. Demo Board Schematic
SNVA479B – April 2011 – Revised April 2013
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AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
5
Bill of Materials
7
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Bill of Materials
Table 2. Bill of Materials (VIN = 6V to 36V (20V), VOUT = 1.2 / 3.3V / 5V, IOUT (MAX) = 10/08/06A)
Designator
U1
6
Description
SIMPLE
SWITCHER®
Case Size
Manufacturer
Manufacturer P/N
Qty
PFM-11
Texas Instruments
LMZ13610/08/06,
LMZ12010/08/06
1
Cin2, Cin3,
Cin4
10 µF, X7S, 50V
1210
TDK
C3225X7S1H106M
3
Cin5
150 µF, Aluminum
Electrolytic, 50V
G
Panasonic
EEE-FK1H151P
1
Co3, Co4
330µF, 6.3V, 0.015
ohm,
2917
Kemet
T520D337M006ATE015
2
Cff
4700 pF, X7R, 50V
0805
Kemet
C0805C472K5RACTU
1
Css
0.15uF, X7R, 10V
0603
Murata
GRM188R71A154KA01D
2
D1
4.7V, 500mW
SOD-123
Vishay
MMSZ4688-V-GS08
1
Rent
4.12k ohm, 1%,
0.125W
0805
Vishay-Dale
CRCW08054K12FKEA
1
Renb
1.27k ohm, 1%,
0.125W
0805
Vishay-Dale
CRCW08051K27FKEA
1
Rfbb
1.07k ohm, 1%,
0.125W
0805
Vishay-Dale
CRCW08051K07FKEA
1
Rfbt_1.2
576 ohm, 1%, 0.125W
0805
Vishay-Dale
CRCW0805576RFKEA
1
Rfbt_1.2b
9.53 ohm, 1%, 0.125W
0805
Vishay-Dale
CRCW08059R53FKEA
1
Rfbt_2.5
3.74k ohm, 1%,
0.125W
0805
Vishay-Dale
CRCW08053K74FKEA
1
Rfbt_2.5b
84.5 ohm, 1%, 0.125W
0805
Vishay-Dale
CRCW080584R5FKEA
1
Rfbt_3.3
8.06k ohm, 1%,
0.125W
0805
Vishay-Dale
CRCW08058K06FKEA
1
Rfbt_3.3b
169 ohm, 1%, 0.125W
0805
Vishay-Dale
CRCW0805169RFKEA
1
Rfbt_5
5.6k ohm, 1%, 0.125W
0805
Vishay-Dale
CRCW08055K60FKEA
1
Rfbt_5b
73.2 ohm, 1%, 0.125W
0805
Vishay-Dale
CRCW080573R2FKEA
1
RFB_LP
20 Ω
0805
Vishay-Dale
CRCW080520R0FKEA
1
EN
Test Point, TH,
Miniature, Red
Keystone Electronics
5000
1
GND
Test Point, TH,
Miniature, Black
Keystone Electronics
5001
2
GND, GND,
VIN, VOUT
Banana Jack
Connector
Keystone Electronics
575-8
4
SH-1
Shunt, 100mil, Gold
plated, Black
Amp
382811-6
1
H1, H2, H3, H4
Machine Screw,
Round, #4-40 x 1/4,
Nylon, Philips panhead
B and FFastener
Supply
NY PMS 440 0025 PH
4
H5, H6, H7, H8
Standoff, Hex, 0.5"L
#4-40 Nylon
Keystone
1902C
4
J1
Header, 4x2, Gold
plated, 230 mil above
insulator
Samtec Inc.
TSW-104-07-G-D
1
J2
20-Pin Dual Edge
Connector, 0.156" pitch
EDAC
305-020-500-202
0
Rts
100 ohm, Temp Sense
Resistor
Vishay
PTS08051B100RP 100
0
TH, 100mil
0805
AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
SNVA479B – April 2011 – Revised April 2013
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Performance Characteristics
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8
Performance Characteristics
Thermal Derating, VOUT = 5.0V
12
90
10
OUTPUT CURRENT (A)
EFFICIENCY (%)
Efficiency, VOUT = 5.0V
100
80
70
60
10 Vin
12 Vin
16 Vin
20 Vin
50
40
0
1
2 3 4 5 6 7 8
OUTPUT CURRENT (A)
10A
8A
8
6
4
2
0
9 10
-40 -20 0 20 40 60 80 100 120
AMBIENT TEMPERATURE (°C)
Startup, VIN = 12V, VOUT = 3.3V
Enable
3.3 Vout
1V/Div
TIME (1 ms/Div)
9
Gerber and CAD Files
Gerber and CAD files can be downloaded from the associated product folder.
SNVA479B – April 2011 – Revised April 2013
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AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
7
PCB Layout Diagrams
10
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PCB Layout Diagrams
Figure 5. Top Layer
Figure 6. Internal Layer I (Ground)
Heat Sinking Layer
8
AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
SNVA479B – April 2011 – Revised April 2013
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PCB Layout Diagrams
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Figure 7. Internal Layer II (Routing)
Heat Sinking Layer
Figure 8. Bottom Layer (Ground and Routing)
Heat Sinking Layer
SNVA479B – April 2011 – Revised April 2013
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AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
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PCB Layout Diagrams
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Figure 9. Top Silkscreen
Figure 10. Bottom Silkscreen
10
AN-2136 LMZ13610/8/6 and LMZ12010/8/6 Demo Board
Copyright © 2011–2013, Texas Instruments Incorporated
SNVA479B – April 2011 – Revised April 2013
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