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TPS54356 Datasheet(PDF) 6 Page - Texas Instruments

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Part # TPS54356
Description  4.5-V TO 20-V INPUT, 3-A OUTPUT SYNCHRONOUS PWM
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54356 Datasheet(HTML) 6 Page - Texas Instruments

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TPS54352,TPS54353
TPS54354,TPS54355
TPS54356,TPS54357
SLVS519A − MAY 2004 − REVISED OCTOBER 2004
www.ti.com
6
ELECTRICAL CHARACTERISTICS (CONTINUED)
TJ = –40°C to 125°C, VIN = 4.5 V to 20 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CURRENT LIMIT
Current limit
VIN = 12 V
3.3
4.5
6.5
A
Current limit hiccup time (1)
fs = 500 kHz
4.5
ms
THERMAL SHUTDOWN
Thermal shutdown trip point (1)
165
_C
Thermal shutdown hysteresis (1)
7
_C
LOW SIDE MOSFET DRIVER (LSG PIN)
Turn on rise time, (10%/90%) (1)
VIN = 4.5 V, Capacitive load = 1000 pF
15
ns
Deadtime (1)
VIN = 12 V
60
ns
Driver ON resistance
VIN = 4.5 V sink/source
7.5
Driver ON resistance
VIN = 12 V sink/source
5
OUTPUT POWER MOSFETS (PH PIN)
Phase node voltage when disabled
DC conditions and no load, ENA = 0 V
0.5
V
Voltage drop, low side FET and diode
VIN = 4.5 V, Idc = 100 mA
1.13
1.42
V
Voltage drop, low side FET and diode
VIN = 12 V, Idc = 100 mA
1.08
1.38
V
rDS(ON)
High side power MOSFET switch (2)
VIN = 4.5 V, BOOT−PH = 4.5 V, IO = 0.5 A
150
300
m
rDS(ON)
High side power MOSFET switch (2)
VIN = 12 V, BOOT−PH = 8 V, IO = 0.5 A
100
200
m
(1) Ensured by design, not production tested.
(2) Resistance from VIN to PH pins.


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