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| TPS542951_16 Datasheet, PDF (4/29 Pages) Texas Instruments – 2A/3A Dual Channel Synchronous Step-Down Switcher with Integrated FET | |||
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TPS542951
SLVSBI4B â JULY 2012 â REVISED OCTOBER 2013
ELECTRICAL CHARACTERISTICS(1) (continued)
over recommended free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER
CONDITIONS
UVLO
VUVREG5
VREG5 UVLO threshold
VREG5 rising
Hysteresis
LOGIC THRESHOLDs
VENxH
ENx H-level threshold voltage
VENxL
ENx L-level threshold voltage
RENx_IN
ENx input resistance
ENx = 12V
CURRENT LIMITs
IOCL1
IOCL2
CH1 Current limit
CH1 Current limit
LOUT1 = 2.2 µH (3)
LOUT2 = 1.5 µH(3)
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION (UVP, OVP)
VUVP
Output UVP trip threshold
TUVPDEL
Output UVP delay time
TUVPEN
Output UVP enable delay
THERMAL SHUTDOWN
TSD
Thermal shutdown threshold
measured on VFBx
UVP enable delay / softstart time
Shutdown temperature(3)
Hysteresis (3)
(3) Specified by design. Not production tested.
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MIN TYP MAX UNIT
3.83
V
0.6
2.0
V
0.4
V
225 450 900
kΩ
2.7 3.9 4.5
A
3.5 4.7 5.4
A
63% 68% 73%
1.5
ms
x 1.4 x 1.7 x 2.0
155
°C
25
4
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Copyright © 2012â2013, Texas Instruments Incorporated
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