Texas Instruments 的 LMZ21700,21701 EVM User Guide 规格书

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User's Guide
SNVU180A–April 2014–Revised October 2014
LMZ21701 and LMZ21700 SIMPLE SWITCHER® Nano
Module Evaluation Board
Introduction
The LMZ21701 and LMZ21700 SIMPLE SWITCHER® nano modules are easy-to-use DC-DC solutions
optimized for space constrained applications. The LMZ21701 is capable of driving up to 1A load with
excellent power conversion efficiency, output voltage accuracy, line and load regulation and load transient
response. The LMZ21700 is a 650 mA load current version module, pin-to-pin compatible with the
LMZ21701. The evaluation board is configured for 3.3V output voltage from 5V to 17V input. The resistor
voltage divider RFBT and RFBB set the output voltage. The external capacitor CSS sets the softstart time for
VOUT . See the datasheet for component selection and device details. The board features turret terminals
for easy connection to input supply, load, EN input, as well as softstart voltage and Power Good flag
monitoring.
Board Specifications
• VIN = 5V to 17V
• VOUT = 3.3V
• 1A max load (LMZ21701)
• 650mA max load (LMZ21700)
• 4 layer PCB
• 4.2 x 4.2 cm PCB size
Figure 2. Board Top View
Figure 1. Board Top View
1
SNVU180A–April 2014–Revised October 2014 LMZ21701 and LMZ21700 SIMPLE SWITCHER® Nano Module Evaluation
Board
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l TEXAS vw 1 __1., GND 3 VIN jg Quick Test Edge Connector Gin) INSTRUMENTS U1 VII vein V01" EN COUT ’9 ZZuF S V06 sun PAD FB LMZZI 70 I SIL GND T11! ssrm A I VIN 5. a 2 ssrm c 3 SPARE‘ GNDCrH GND n - SFAREA GNDO n2 GND E 5 VINNOUY 57 {:FGND GND 3 GND r a SPAREZ GND H 7 PG vour J a sane: x 9 L vouT EN EN N12 TY12 O FGOOD I0 vow s~ M3
OPTIONAL CONNECTOR FOR TESTING THE BOARD
OPTIONAL COMPONENT FOR CONTROL
LOOP MEASUREMENTS WITH
FREQUENCY RESPONSE ANALYZER
Schematic, Bill of Materials, and PCB Layout
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1 Schematic, Bill of Materials, and PCB Layout
Figure 3. Evaluation Board Schematic
Table 1. Bill of Materials, VIN =5Vto17V,VOUT = 3.3 V,
IOUT (MAX) = 1000 mA (LMZ21701), 650 mA (LMZ21700)
Designator Description Case Size Manufacturer Manufacturer P/N Quantity
U1 SIMPLE SWITCHER® SIL0008E Texas Instruments LMZ21701SIL / 1
Nano Module LMZ21700SIL
CIN CAP, CERM, 22 µF, 1210 MuRata GRM32ER71E226KE15L 1
25V, +/-10%, X7R
COUT CAP, CERM, 22 µF, 0805 Taiyo Yuden LMK212BJ226MG-T 1
10V, +/-20%, X5R
CSS CAP, CERM, 3300 pF, 0402 MuRata GRM155R71H332KA01D 1
50V, +/-10%, X7R
J1 Header, TH, 100 mil, Samtec, Inc TSW-103-07-G-S 1
1x3, Gold plated
Rfbb RES, 383k ohm, 1%, 0402 Vishay-Dale CRCW0402383KFKED 1
0.063W
Rfbt RES, 1.21Meg ohm, 0402 Vishay-Dale CRCW04021M21FKED 1
1%, 0.063W
Rpg RES, 10.0k ohm, 1%, 0402 Vishay-Dale CRCW040210K0FKED 1
0.063W
2LMZ21701 and LMZ21700 SIMPLE SWITCHER® Nano Module Evaluation SNVU180A–April 2014–Revised October 2014
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Schematic, Bill of Materials, and PCB Layout
Table 1. Bill of Materials, VIN =5Vto17V,VOUT = 3.3 V,
IOUT (MAX) = 1000 mA (LMZ21701), 650 mA (LMZ21700) (continued)
Designator Description Case Size Manufacturer Manufacturer P/N Quantity
Rs RES, 10.0 ohm, 1%, 0402 Vishay-Dale CRCW040210R0FKED 1
0.063W
SH-J1 Shunt, 100mil, Gold Samtec, Inc SNT-100-BK-G 1
plated, Black
TT1-12 Terminal, Turret, TH, Keystone Electronics 1502-2 8
Double
Vout S+ Test Point, TH, Keystone Electronics 5004 1
Miniature, Yellow
Figure 5. Evaluation Board Mid Layer 1
Figure 4. Evaluation Board Top Layer
Figure 6. Evaluation Board Mid Layer 2 Figure 7. Evaluation Board Bottom Layer
3
SNVU180A–April 2014–Revised October 2014 LMZ21701 and LMZ21700 SIMPLE SWITCHER® Nano Module Evaluation
Board
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50mV/Div
500MHz BW 1µs/Div
COUT1 = 22F 10V 0805 X5R
Taiyo Yuden MK212BJ226MG-T
COUT2 = 3x1000pF 0805 NP0
Johanson Dielectrics 500R15N102JV4T
VOUT RIPPLE
WITH 500MHz SCOPE BANDWIDTH
10mV/Div
20MHz BW 1µs/Div
COUT = 22F 10V 0805 X5R
Taiyo Yuden MK212BJ226MG-T
VOUT RIPPLE
20MHz BW 1ms/Div
VOUT 20mV/Div AC
ILOAD 500mA/Div
3.290
3.292
3.294
3.296
3.298
3.300
3.302
3.304
3.306
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT VOLTAGE (V)
LOAD CURRENT (A)
VIN=4.5V
VIN=5V
VIN=9V
VIN=12V
VIN=15V
VIN=17V
C001
0
10
20
30
40
50
60
70
80
90
100
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
EFFICIENCY (%)
LOAD CURRENT (A)
VIN=4.5V
VIN=5V
VIN=9V
VIN=12V
VIN=15V
VIN=17V
C001
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
POWER DISSIPATION (W)
LOAD CURRENT (A)
VIN=4.5V
VIN=5V
VIN=9V
VIN=12V
VIN=15V
VIN=17V
C001
Typical Performance
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2 Typical Performance
Figure 8. Efficiency Figure 9. Power Dissipation
Figure 10. Line and Load Regulation Figure 11. Load Transient
Figure 12. Output Voltage Ripple (20 MHz Scope BW) Figure 13. Output Voltage Ripple and HF Noise (500 MHz
Scope BW)
4LMZ21701 and LMZ21700 SIMPLE SWITCHER® Nano Module Evaluation SNVU180A–April 2014–Revised October 2014
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Frequency (MHz)
Conducted Emissions (dBµV)
0.1 1 10 100
0
10
20
30
40
50
60
70
80
90
100
D003
Peak Emissions
Quasi Peak Limit
Average Limit
Frequency (MHz)
Radiated Emissions (dBµV/m)
0 200 400 600 800 1000
0
10
20
30
40
50
60
70
80
D004
Evaluation Board
EN 55022 Class B Limit
EN 55022 Class A Limit
Frequency (MHz)
Radiated Emissions (dBµV/m)
0 200 400 600 800 1000
0
10
20
30
40
50
60
70
80
D002
Evaluation Board
EN 55022 Class B Limit
EN 55022 Class A Limit
ENABLE 500mV/Div
20MHz BW 1ms/Div
PGOOD 2V/Div
VOUT 1V/Div
ILOAD 500mA/Div
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Typical Performance
Figure 14. Startup
Figure 15. LMZ21700 Radiated EMI (Default BOM), VIN = 12
V, VOUT = 3.3 V, IOUT = 650 mA
Figure 16. LMZ21701 Radiated EMI (Default BOM), VIN = 12 Figure 17. LMZ21700 Conducted EMI (1 µF, 2.2 µH input
V, VOUT = 3.3 V, IOUT = 1000 mA filter), VIN = 12V, VOUT = 3.3V, IOUT = 650 mA
Figure 18. LMZ21701 Conducted EMI (1 µF, 2.2 µH additional input filter), VIN = 12V, VOUT = 3.3 V,
IOUT = 1000 mA
5
SNVU180A–April 2014–Revised October 2014 LMZ21701 and LMZ21700 SIMPLE SWITCHER® Nano Module Evaluation
Board
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Revision History
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Revision History
Changes from Original (April 2014) to A Revision .......................................................................................................... Page
• Added SVA cleanup and editing......................................................................................................... 5
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
6Revision History SNVU180A–April 2014–Revised October 2014
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