Datasheet

TPS5450
www.ti.com SLVS757C –MARCH 2007–REVISED OCTOBER 2013
RECOMMENDED OPERATING CONDITIONS
MIN NOM MAX UNIT
V
I
Input voltage range 5.5 36 V
T
J
Operating junction temperature –40 125 °C
ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 125°C, VIN = 5.5 V - 36 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VIN PIN)
VSENSE = 2 V, Not switching,
3 4.4 mA
PH pin open
I
Q
Quiescent current
Shutdown, ENA = 0 V 18 50 μA
UNDERVOLTAGE LOCK OUT (UVLO)
Start threshold voltage, UVLO 5.3 5.5 V
Hysteresis voltage, UVLO 330 mV
VOLTAGE REFERENCE
T
J
= 25°C 1.202 1.221 1.239
Voltage reference accuracy V
I
O
= 0 A – 5 A 1.196 1.221 1.245
OSCILLATOR
Internally set free-running frequency 400 500 600 kHz
Minimum controllable on time 150 200 ns
Maximum duty cycle 87 89 %
ENABLE (ENA PIN)
Start threshold voltage, ENA 1.3 V
Stop threshold voltage, ENA 0.5 V
Hysteresis voltage, ENA 450 mV
Internal slow-start time (0~100%) 6.6 8 10 ms
CURRENT LIMIT
Current limit 6.0 7.5 9.0 A
Current limit hiccup time 13 16 20 ms
THERMAL SHUTDOWN
Thermal shutdown trip point 135 162 °C
Thermal shutdown hysteresis 14 °C
OUTPUT MOSFET
VIN = 5.5 V 150
r
DS(on)
High-side power MOSFET switch mΩ
110 230
Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: TPS5450