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 RTand RBset the output voltage. The external capacitor CVCbypasses
the V
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
• V
• 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)
pin and provides additional soft start time. for component selection and device information
CON
= 1.8V (default setting)
OUT
®
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 AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module
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Evaluation Board
1
0 200 400 600 800 1000
0
10
20
30
40
50
60
70
80
RADIATED EMISSIONS (dBV/m)
FREQUENCY (MHz)
Emissions (Evaluation Board)
EN 55022 Class B Limit
EN 55022 Class A Limit
10 mV/Div
500 MHz BW
1 µs/Div
COUT = 10 F 10V 0805 X5R
VOUT RIPPLE
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
LOAD CURRENT (A)
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
1.780
1.785
1.790
1.795
1.800
1.805
1.810
1.815
1.820
OUTPUT VOLTAGE (V)
LOAD CURRENT (A)
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
±1%
Typical Performance Characteristics
3 Typical Performance Characteristics
www.ti.com
Efficiency V
VIN= 5V, V
= 1.8V Line and Load Regulation
OUT
Output Ripple Radiated EMI
OUT
= 1.8V, I
= 1A VIN= 5V, V
OUT
OUT
= 1.8V, I
OUT
= 1A
2
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module SNVA491B–August 2011–Revised April 2013
Evaluation Board
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CIRCUIT FOR VARIOUS ENABLE SCHEMES
OPTIONAL COMPONENT FOR AC
INJECTION FOR CONTROL LOOP
MEASUREMENTS
BOARD EDGE PAD ASSIGNMENTS FOR QUICK CONNECTION
OPTIONAL
OPTIONAL
PLACE CIN AS CLOSE AS
POSSIBLE TO THE PVIN AND
PGND PINS FOR GOOD BYPASS
RESISTORS RT AND RB
SET THE OUTPUT
VOLTAGE
PLACE CVC AS CLOSE AS
POSSIBLE TO THE VCON
AND SGND PINS
ENABLE OPT
EN
TURRET
*
*
*
Components marked
with (*) are not
populated on the board
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4 Evaluation Board Schematic and Bill of Materials
Evaluation Board Schematic and Bill of Materials
Table 1. LMZ10501 and LMZ10500 Bill of Materials, VIN= 2.7V to 5.5V, V
Designator Description Case Size Manufacturer Manufacturer P/N Quantity
U1 SIMPLE SWITCHER SE08A Texas Instruments LMZ10501SE or 1
CIN, C
OUT
C
VC
R
B
R
T
R
EN
(optional)
R
INJ
(optional)
Figure 1. Evaluation Board Schematic
= 1.8V, I
650mA
OUT
OUT (MAX)
Nano Module LMZ10500SE
10 µF, X5R, 10V 0805 KEMET C0805C106K8PACTU 2
1000 pF 0603 TDK C1608C0G2A102J 1
82.5 kΩ 0603 Vishay-Dale CRCW060382K5FKEA 1
187 kΩ 0603 Vishay-Dale CRCW0603187KFKEA 1
1 kΩ 0603 Vishay-Dale CRCW06031K00FKEA 1
10 Ω 0603 Vishay-Dale CRCW060310R0FKEA 1
= 1000mA /
SNVA491B–August 2011–Revised April 2013 AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module
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Evaluation Board
3
Evaluation Board Layout
4.1 Optional Components and Footprints
• R
• RPUresistor – an optional footprint to pull EN up to VINwith an external resistor. EN is internally pulled
• REN– an optional resistor in series with the EN pin.
• RPD– an optional pull-down resistor for the QENgate.
• 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
• EC1 – board edge connector for quick testing.
• C
resistor – allows for a network analyzer connection to measure the control loop response. Replace
INJ
this resistor with a short in a final design if control loop measurements are not needed.
up to VINby a 790 kΩ resistor.
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.
footprints – the solder mask on the V
OUT
capacitor configurations.
5 Evaluation Board Layout
side of the board is removed to allow for different output
OUT
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4
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module SNVA491B–August 2011–Revised April 2013
Evaluation Board
Figure 2. Evaluation Board Top View
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Evaluation Board Layout
Figure 3. Evaluation Board Bottom View
Figure 4. Evaluation Board Assembly (DNP = not populated components)
SNVA491B–August 2011–Revised April 2013 AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module
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Evaluation Board
5
30 mV/Div
250 MHz BW 500 µs/Div
COUT = 10 F 10V 0805 X5R
LOAD CURRENT
OUTPUT VOLTAGE
500 mA/Div
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
1.780
1.785
1.790
1.795
1.800
1.805
1.810
1.815
1.820
OUTPUT VOLTAGE (V)
LOAD CURRENT (A)
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
±1%
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
LOAD CURRENT (A)
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
10 mV/Div
500 MHz BW
1 µs/Div
COUT = 10 F 10V 0805 X5R
VOUT RIPPLE
Typical Performance for V
OUT
= 1.8V
www.ti.com
6 Typical Performance for V
Unless otherwise specified the following conditions apply: VIN= 5V, I
Efficiency Output Voltage Ripple
Load Transient Response Line and load regulation
OUT
= 1.8V
= 1A, TA= 25°C
OUT
6
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module SNVA491B–August 2011–Revised April 2013
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100m 1 10 100
0
10
20
30
40
50
60
70
80
CONDUCTED EMISSIONS (dBV)
FREQUENCY (MHz)
Conducted Emissions
CISPR 22 Quasi Peak
CISPR 22 Average
MODULE
INPUT
FILTER
Cf = 0603YD105MAT AVX
Lf = VLS252015T-1R0N1R7 TDK
60 70 80 90 100 110 120 130
0.0
0.2
0.4
0.6
0.8
1.0
1.2
OUTPUT CURRENT (A)
AMBIENT TEMPERATURE (°C)
VIN = 3.3V
VIN = 3.6V
VIN = 5.0V
VIN = 5.5V
0.0 0.2 0.4 0.6 0.8 1.0
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
DROPOUT VOLTAGE (V)
LOAD CURRENT (A)
VIN = 2.7V
VIN = 3.3V
VIN = 3.6V
VIN = 4.0V
0 200 400 600 800 1000
0
10
20
30
40
50
60
70
80
RADIATED EMISSIONS (dBV/m)
FREQUENCY (MHz)
Emissions (Evaluation Board)
EN 55022 Class B Limit
EN 55022 Class A Limit
2.5 3.0 3.5 4.0 4.5 5.0 5.5
1.0
1.1
1.2
1.3
1.4
1.5
DC CURRENT LIMIT (A)
INPUT VOLTAGE (V)
TA= 85°C
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Typical Performance for V
Radiated EMI DC Current Limit
Thermal Derating Dropout Voltage
OUT
= 1.8V
Input LC Filter for Conducted EMI Conducted EMI with the Input LC Filter
SNVA491B–August 2011–Revised April 2013 AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module
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Evaluation Board
7
0 200 400 600 800 1000
0
10
20
30
40
50
60
70
80
RADIATED EMISSIONS (dBV/m)
FREQUENCY (MHz)
Emissions
CISPR 22 Class B Limit
CISPR 22 Class A Limit
Typical Performance for V
OUT
= 1.8V
www.ti.com
Radiated EMI with the Input LC Filter
8
AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module SNVA491B–August 2011–Revised April 2013
Evaluation Board
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FB
EN
V
REF
SGND
PGND
3.3V
V
OUT
V
IN
C
OUT
C
IN
V
OUT
V
CON
V
IN
C
VC
R
B
R
T
C
IN
C
OUT
C
VC
R
T
R
B
118 k: 1% 0603
150 k: 1% 0603
10 P)86.3V 0805 X7R or X5R
10 PF 86.3V 0805 X7R or X5R
470 pF 86.3V 0603 X7R or X5R
FB
EN
V
REF
SGND
PGND
2.5V
V
OUT
V
IN
C
OUT
C
IN
V
OUT
V
CON
V
IN
C
VC
R
B
R
T
10 P)86.3V 0805 X7R or X5R
C
IN
C
OUT
C
VC
R
T
R
B
10 PF 86.3V 0805 X7R or X5R
470 pF 86.3V 0603 X7R or X5R
150 k: 1% 0603
118 k: 1% 0603
FB
EN
V
REF
SGND
PGND
1.2V
V
OUT
V
IN
C
OUT
C
IN
V
OUT
V
CON
V
IN
C
VC
R
B
R
T
C
IN
C
OUT
C
VC
R
T
R
B
243 k: 1% 0603
63.4 k: 1% 0603
10 P)86.3V 0805 X7R or X5R
10 PF 86.3V 0805 X7R or X5R
470 pF 86.3V 0603 X7R or X5R
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7 Other Output Voltage Settings
Other Output Voltage Settings
Figure 5. V
Figure 6. V
OUT
OUT
= 1.2V
= 2.5V
For other output voltages, choose RT= 80kΩ to 300kΩ
SNVA491B–August 2011–Revised April 2013 AN-2166 LMZ10501 and LMZ10500 SIMPLE SWITCHER®Nano Module
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Then calculate RBusing
RB= V
x RT/ (5.875V – V
OUT
Figure 7. V
) (1)
OUT
Copyright © 2011–2013, Texas Instruments Incorporated
OUT
= 3.3V
Evaluation Board
9
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