User's Guide
SNVA491B – August 2011 – Revised April 2013
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®
Nano Module Evaluation Board
1
Introduction
The LMZ10501 and LMZ10500 SIMPLE SWITCHER nano modules are easy-to-use DC-DC solutions
optimized for space-constrained applications. The LMZ10501 is capable of driving up to 1A load with
excellent power conversion efficiency, line and load regulation, and EMI performance. The LMZ10500 is a
650mA version module and is pin-to-pin compatible with the LMZ10501.
The LMZ10501 and LMZ10500 Evaluation Board is configured for 1.8V output voltage from 2.7V to 5.5V
input. The resistor voltage divider RT and RB set the output voltage. The external capacitor CVC bypasses
the VCON pin and provides additional soft start time. for component selection and device information
details, see the device-specific data sheet. The board features additional component footprints for various
device enabling schemes and AC signal injection terminals for feedback loop measurements.
The evaluation board with its default Bill of Materials offers great EMI performance, complying with the EN
55022 Class B radiated emissions standard.
2
Board Specifications
•
•
•
•
•
•
•
•
VIN = 2.7V to 5.5V
VOUT = 1.8V (default setting)
1A max load (LMZ10501)
650mA max load (LMZ10500)
2MHz switching frequency
4 layers PCB with 1oz copper
4.3 x 4.3 cm (1700 x 1700 mil) PCB size
Low radiated EMI (EN 55022 Class B compliant)
SIMPLE SWITCHER is a registered trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
SNVA491B – August 2011 – Revised April 2013
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AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
Copyright © 2011–2013, Texas Instruments Incorporated
1
Typical Performance Characteristics
3
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Typical Performance Characteristics
Line and Load Regulation
1.820
90
1.815
80
70
60
50
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
40
30
OUTPUT VOLTAGE (V)
EFFICIENCY (%)
Efficiency VOUT = 1.8V
100
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
±1%
1.810
1.805
1.800
1.795
1.790
1.785
20
1.780
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
Output Ripple
VIN = 5V, VOUT = 1.8V, IOUT = 1A
Radiated EMI
VIN = 5V, VOUT = 1.8V, IOUT = 1A
VOUT RIPPLE
COUT = 10 F 10V 0805 X5R
10 mV/Div
500 MHz BW
1 µs/Div
RADIATED EMISSIONS (dB V/m)
80
Emissions (Evaluation Board)
EN 55022 Class B Limit
EN 55022 Class A Limit
70
60
50
40
30
20
10
0
0
2
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
200
400
600
800
FREQUENCY (MHz)
1000
SNVA491B – August 2011 – Revised April 2013
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Evaluation Board Schematic and Bill of Materials
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4
Evaluation Board Schematic and Bill of Materials
OPTIONAL
EN
TURRET
*
Components marked
with (*) are not
populated on the board
RESISTORS RT AND RB
SET THE OUTPUT
VOLTAGE
PLACE CIN AS CLOSE AS
POSSIBLE TO THE PVIN AND
PGND PINS FOR GOOD BYPASS
*
*
CIRCUIT FOR VARIOUS ENABLE SCHEMES
OPTIONAL
PLACE CVC AS CLOSE AS
POSSIBLE TO THE VCON
AND SGND PINS
ENABLE OPT
OPTIONAL COMPONENT FOR AC
INJECTION FOR CONTROL LOOP
MEASUREMENTS
BOARD EDGE PAD ASSIGNMENTS FOR QUICK CONNECTION
Figure 1. Evaluation Board Schematic
Table 1. LMZ10501 and LMZ10500 Bill of Materials, VIN = 2.7V to 5.5V, VOUT = 1.8V, IOUT (MAX) = 1000mA /
650mA
Designator
Description
Case Size
Manufacturer
Manufacturer P/N
Quantity
U1
SIMPLE SWITCHER
Nano Module
SE08A
Texas Instruments
LMZ10501SE or
LMZ10500SE
1
CIN, COUT
10 µF, X5R, 10V
0805
KEMET
C0805C106K8PACTU
2
CVC
1000 pF
0603
TDK
C1608C0G2A102J
1
RB
82.5 kΩ
0603
Vishay-Dale
CRCW060382K5FKEA
1
RT
187 kΩ
0603
Vishay-Dale
CRCW0603187KFKEA
1
REN
(optional)
1 kΩ
0603
Vishay-Dale
CRCW06031K00FKEA
1
RINJ
(optional)
10 Ω
0603
Vishay-Dale
CRCW060310R0FKEA
1
SNVA491B – August 2011 – Revised April 2013
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AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
Copyright © 2011–2013, Texas Instruments Incorporated
3
Evaluation Board Layout
4.1
Optional Components and Footprints
•
•
•
•
•
•
•
•
5
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RINJ resistor – allows for a network analyzer connection to measure the control loop response. Replace
this resistor with a short in a final design if control loop measurements are not needed.
RPU resistor – an optional footprint to pull EN up to VIN with an external resistor. EN is internally pulled
up to VIN by a 790 kΩ resistor.
REN – an optional resistor in series with the EN pin.
RPD – an optional pull-down resistor for the QEN gate.
QEN – an optional footprint to use an N-ch MOSFET as a pull-down device for EN.
J1 – jumper to select how to drive EN. Connecting the jumper pins 1 and 2 allows for driving EN
directly from the EN turret at the edge of the board. Connecting the jumper pins 2 and 3 allows for
driving the gate of the pull-down device QEN.
EC1 – board edge connector for quick testing.
COUT footprints – the solder mask on the VOUT side of the board is removed to allow for different output
capacitor configurations.
Evaluation Board Layout
Figure 2. Evaluation Board Top View
4
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
SNVA491B – August 2011 – Revised April 2013
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Evaluation Board Layout
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Figure 3. Evaluation Board Bottom View
Figure 4. Evaluation Board Assembly (DNP = not populated components)
SNVA491B – August 2011 – Revised April 2013
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AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
Copyright © 2011–2013, Texas Instruments Incorporated
5
Typical Performance for VOUT = 1.8V
6
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Typical Performance for VOUT = 1.8V
Unless otherwise specified the following conditions apply: VIN = 5V, IOUT = 1A, TA = 25°C
Efficiency
Output Voltage Ripple
100
VOUT RIPPLE
COUT = 10 F 10V 0805 X5R
EFFICIENCY (%)
90
80
70
60
10 mV/Div
50
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
40
30
500 MHz BW
1 µs/Div
20
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
Load Transient Response
Line and load regulation
1.820
COUT = 10 F 10V 0805 X5R
30 mV/Div
500 mA/Div
250 MHz BW
OUTPUT VOLTAGE
LOAD CURRENT
500 µs/Div
OUTPUT VOLTAGE (V)
1.815
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
±1%
1.810
1.805
1.800
1.795
1.790
1.785
1.780
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
6
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
SNVA491B – August 2011 – Revised April 2013
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated
Typical Performance for VOUT = 1.8V
www.ti.com
Radiated EMI
DC Current Limit
1.5
Emissions (Evaluation Board)
EN 55022 Class B Limit
EN 55022 Class A Limit
70
DC CURRENT LIMIT (A)
RADIATED EMISSIONS (dB V/m)
80
60
50
40
30
20
10
0
0
200
400
600
800
FREQUENCY (MHz)
1.3
1.2
1.1
1.0
2.5
1000
Thermal Derating
3.0
3.5
4.0
4.5
5.0
INPUT VOLTAGE (V)
5.5
Dropout Voltage
0.35
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
1.0
0.8
0.6
0.4
0.2
DROPOUT VOLTAGE (V)
1.2
OUTPUT CURRENT (A)
TA= 85°C
1.4
0.30
0.25
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 4.0V
0.20
0.15
0.10
0.05
0.0
0.00
60
70 80 90 100 110 120 130
AMBIENT TEMPERATURE (°C)
0.0
Input LC Filter for Conducted EMI
80
CONDUCTED EMISSIONS (dB V)
Cf = 0603YD105MAT AVX
Lf = VLS252015T-1R0N1R7 TDK
1.0
Conducted EMI with the Input LC Filter
FILTER
MODULE
INPUT
0.2
0.4
0.6
0.8
LOAD CURRENT (A)
70
Conducted Emissions
CISPR 22 Quasi Peak
CISPR 22 Average
60
50
40
30
20
10
0
100m
SNVA491B – August 2011 – Revised April 2013
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1
10
FREQUENCY (MHz)
100
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
Copyright © 2011–2013, Texas Instruments Incorporated
7
Typical Performance for VOUT = 1.8V
www.ti.com
Radiated EMI with the Input LC Filter
RADIATED EMISSIONS (dB V/m)
80
Emissions
CISPR 22 Class B Limit
CISPR 22 Class A Limit
70
60
50
40
30
20
10
0
0
8
200
400
600
800
FREQUENCY (MHz)
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
1000
SNVA491B – August 2011 – Revised April 2013
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Copyright © 2011–2013, Texas Instruments Incorporated
Other Output Voltage Settings
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7
Other Output Voltage Settings
VIN
1.2V
VOUT
CIN
EN
VIN
VOUT
VREF
FB
RT
VCON
RB
CIN
COUT
CVC
RT
RB
COUT
PGND
SGND
CVC
10 P) 8 6.3V
10 PF 8 6.3V
470 pF 8 6.3V
243 k: 1%
63.4 k: 1%
0805 X7R or X5R
0805 X7R or X5R
0603 X7R or X5R
0603
0603
Figure 5. VOUT = 1.2V
VIN
2.5V
VOUT
CIN
EN
VIN
VOUT
VREF
FB
RT
VCON
RB
CIN
COUT
CVC
RT
RB
COUT
PGND
SGND
CVC
10 P) 8 6.3V
10 PF 8 6.3V
470 pF 8 6.3V
150 k: 1%
118 k: 1%
0805 X7R or X5R
0805 X7R or X5R
0603 X7R or X5R
0603
0603
Figure 6. VOUT = 2.5V
VIN
3.3V
VOUT
CIN
EN
VIN
VOUT
VREF
FB
RT
VCON
RB
CIN
COUT
CVC
RT
RB
PGND
COUT
SGND
CVC
10 P) 8 6.3V
10 PF 8 6.3V
470 pF 8 6.3V
118 k: 1%
150 k: 1%
0805 X7R or X5R
0805 X7R or X5R
0603 X7R or X5R
0603
0603
Figure 7. VOUT = 3.3V
For other output voltages, choose RT = 80kΩ to 300kΩ
Then calculate RB using
RB = VOUT x RT / (5.875V – VOUT)
SNVA491B – August 2011 – Revised April 2013
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(1)
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER® Nano Module
Evaluation Board
Copyright © 2011–2013, Texas Instruments Incorporated
9
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