Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- RECOMMENDED OPERATING CONDITIONS
- THERMAL INFORMATION
- PACKAGE SPECIFICATIONS
- ELECTRICAL CHARACTERISTICS
- DEVICE INFORMATION
- TYPICAL CHARACTERISTICS (PVIN = VIN = 12 V) The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the converter. Applies to , , and . The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to devices soldered directly to a 100 mm × 100 mm six-layer PCB with 1 oz. copper. Applies to , , and .
- TYPICAL CHARACTERISTICS (PVIN = VIN = 5 V) The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the converter. Applies to , , and . The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to devices soldered directly to a 100 mm × 100 mm six-layer PCB with 1 oz. copper. Applies to , , and .
- APPLICATION INFORMATION
- ADJUSTING THE OUTPUT VOLTAGE
- Frequency Select
- CAPACITOR RECOMMENDATIONS FOR THE LMZ31530 POWER SUPPLY
- Transient Response
- Transient Waveforms Device configured for FCCM mode of operation, (pin 3 connected to pin 19).
- Application Schematics
- VIN and PVIN Input Voltage
- 3.3 V PVIN Operation
- Power Good (PWRGD)
- Slow Start (SS_SEL)
- Auto-Skip Eco-Mode / Forced Continuous Conduction Mode
- Power-Up Characteristics
- Pre-Biased Start-Up
- Remote Sense
- Output On/Off Inhibit (INH)
- Overcurrent Protection
- Current Limit (ILIM) Adjust
- Thermal Shutdown
- Layout Considerations
- EMI
- Revision History
LMZ31530
www.ti.com
SLVSBC7B –OCTOBER 2013–REVISED DECEMBER 2013
Table 3. Recommended Input/Output Capacitors
(1)
CAPACITOR CHARACTERISTICS
WORKING
VENDOR SERIES PART NUMBER
CAPACITANCE ESR
(2)
VOLTAGE
(µF) (mΩ)
(V)
Murata X5R GRM32ER61E226K 25 22 2
TDK X5R C3216X5R1E476M 25 47 2
TDK X5R C3216X5R1C476M 16 47 2
Murata X5R GRM32ER61C476M 16 47 2
TDK X5R C3225X5R0J107M 6.3 100 2
Murata X5R GRM32ER60J107M 6.3 100 2
TDK X5R C3225X5R0J476K 6.3 47 2
Murata X5R GRM32ER60J476M 6.3 47 2
Panasonic EEH-ZA EEH-ZA1E101XP 25 100 30
Kemet T520 T520V107M010ASE025 10 100 25
Panasonic POSCAP 6TPE100MI 6.3 100 25
Panasonic POSCAP 2R5TPE220M7 2.5 220 7
Kemet T530 T530D227M006ATE006 6.3 220 6
Kemet T530 T530D337M006ATE010 6.3 330 10
Panasonic POSCAP 2TPF330M6 2.0 330 6
Panasonic POSCAP 6TPE330MFL 6.3 330 15
(1) Capacitor Supplier Verification, RoHS, Lead-free and Material Details
Consult capacitor suppliers regarding availability, material composition, RoHS and lead-free status, and manufacturing process
requirements for any capacitors identified in this table.
(2) Maximum ESR @ 100kHz, 25°C.
Transient Response
The LMZ31530 is designed to have an ultra-fast load step response with minimal output capacitance. Table 4
shows the voltage deviation and recovery time for several different transient conditions. Several waveforms are
shown in Transient Waveforms
(3)
.
Table 4. Output Voltage Transient Response
C
IN1
= 3 x 47 µF CERAMIC
VOLTAGE DEVIATION (mV)
RECOVERY TIME
V
OUT
(V) V
IN
(V) C
OUT1
Ceramic C
OUT2
BULK
10 A LOAD STEP, 15 A LOAD STEP,
(µs)
(1 A/µs) (1 A/µs)
5 500 µF - 15 18 35
0.6
12 500 µF - 15 20 35
500 µF - 15 18 40
5
500 µF 470 µF 12 15 40
0.9
500 µF - 20 25 40
12
500 µF 470 µF 16 22 40
500 µF - 20 25 40
5
500 µF 330 µF 15 22 40
1.2
500 µF - 20 25 40
12
500 µF 330 µF 16 24 40
500 µF - 20 30 40
5
500 µF 330 µF 16 25 40
1.8
500 µF - 20 30 40
12
500 µF 330 µF 16 25 45
5 500 µF - 25 40 50
3.3
12 500 µF - 25 35 50
(3) Device configured for FCCM mode of operation, (pin 3 connected to pin 19).
Copyright © 2013, Texas Instruments Incorporated 13
Product Folder Links: LMZ31530