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
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
34353640 3738394142434445464748
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
PGND
PGND
PGND
PGND
PGND
PVIN
PVIN
PVIN
PGND
PGND
PGND
PGND
PGND
NC
PGND
NC
NC
NC
NC
PH
PH
PH
PH
PH
PH
PH
DNC
DNC
PWRGD
V5V
PGND
PGND
PGND
VIN
SS_SEL
DNC
PGND
ILIM
FREQ_SEL
DNC
AGND
VOUT
PH
DNC
VADJ
SENSE+
VIN
INH
DNC
DNC
1
3349
17
68
65
69
66
72
70
67
71
PGND
PGND
VOUT
PGND
PGND
PH
PGND
PVIN
PVIN
PGND
PGND
PGND
PWRGD_PU
LMZ31530
www.ti.com
SLVSBC7B –OCTOBER 2013–REVISED DECEMBER 2013
ELECTRICAL CHARACTERISTICS (continued)
T
A
= -40°C to 85°C, PVIN = VIN = 12 V, VOUT = 1.8 V, I
OUT
= 30A
C
IN
= 2x 22 µF ceramic & 330 µF bulk, C
OUT
= 4x 100 µF ceramic (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
C
OUT
External output capacitance 100
(6)
400 5000 µF
(6) A minimum of 100 µF of ceramic capacitance is required at the output. Locate the capacitance close to the device. Adding additional
capacitance close to the load improves the response of the regulator to load transients and reduces ripple. See Table 3 for more details.
DEVICE INFORMATION
RLG PACKAGE
(TOP VIEW)
Copyright © 2013, Texas Instruments Incorporated 5
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