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
PWRGD
SENSE+
VOUTPVIN
INH
FREQ_SEL
C
IN2
22 µF
VADJ
SS_SEL
AGND PGND
C
IN1
100 µF
R
SET
2.87 k
+
C
OUT1
3x 100 µF
C
OUT2
330 µF
V
OUT
0.9 V
+
P
VIN
3.3 V
C
IN3
22 µF
V
IN
4.5 V to 14.5 V
C
IN3
4.7 µF
LMZ31530
PWRGD
SENSE+
VOUT
VIN
PVIN
INH
FREQ_SEL
C
IN2
22 µF
VADJ
SS_SEL
AGND PGND
C
IN1
100 µF
R
SET
1.43 k
+
C
OUT1
2x 100 µF
C
OUT2
220 µF
V
OUT
1.2 V
+
V
IN
/ P
VIN
4.5 V to 14.5 V
C
IN3
22 µF
LMZ31530
www.ti.com
SLVSBC7B –OCTOBER 2013–REVISED DECEMBER 2013
Application Schematics
Figure 17. Typical Schematic
PVIN = VIN = 4.5 V to 14.5 V, VOUT = 1.2 V
Figure 18. Typical Schematic
PVIN = 3.3 V, VIN = 4.5 V to 14.5 V, VOUT = 0.9 V
Copyright © 2013, Texas Instruments Incorporated 15
Product Folder Links: LMZ31530