Datasheet

TPS542951
SLVSBI4B –JULY 2012–REVISED OCTOBER 2013 www.ti.com
ELECTRICAL CHARACTERISTICS
(1)
(continued)
over recommended free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
UVLO
VREG5 rising 3.83
V
UVREG5
VREG5 UVLO threshold V
Hysteresis 0.6
LOGIC THRESHOLDs
V
ENxH
ENx H-level threshold voltage 2.0 V
V
ENxL
ENx L-level threshold voltage 0.4 V
R
ENx_IN
ENx input resistance ENx = 12V 225 450 900 kΩ
CURRENT LIMITs
I
OCL1
CH1 Current limit L
OUT1
= 2.2 µH
(3)
2.7 3.9 4.5 A
I
OCL2
CH1 Current limit L
OUT2
= 1.5 µH
(3)
3.5 4.7 5.4 A
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION (UVP, OVP)
V
UVP
Output UVP trip threshold measured on VFBx 63% 68% 73%
T
UVPDEL
Output UVP delay time 1.5 ms
T
UVPEN
Output UVP enable delay UVP enable delay / softstart time x 1.4 x 1.7 x 2.0
THERMAL SHUTDOWN
Shutdown temperature
(3)
155
T
SD
Thermal shutdown threshold °C
Hysteresis
(3)
25
(3) Specified by design. Not production tested.
4 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: TPS542951