TPS65280_15 datasheet(9/34 Pages) TI

No. de pieza	TPS65280

Descripción Electrónicos	DUAL POWER DISTRIBUTION SWITCH AND MONOLITHIC SYNCHRONOUS BUCK REGULATOR WITH 5.5-V TO 18-V INPUT VOLTAGE, FIXED 5-V OUTPUT VOLTAGE AND REGULATOR WITH 5.5-V TO 18-V INPUT VOLTAGE, FIXED 5-V OUTPUT VOLTAGE AND

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Fabricante Electrónico	TI [Texas Instruments]

Página de inicio	http://www.ti.com

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VEN_SWx

VOUT_SWx

tD_on tr

90%

10%

50%

90%

tD_off

10%

tf

TPS65280

www.ti.com

SLVSBE4A – JUNE 2012 – REVISED SEPTEMBER 2012

ELECTRICAL CHARACTERISTICS (continued)

TJ = 25°C, VIN = 12 V, fSW = 600 kHz, RnFAULTx = 100 kΩ (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Fault assertion or de-assertion due to over-

tDEGLITCH(OCP)

Switch over current fault deglitch

7

10

13

ms

current condition

VL_nFAULT

nFAULTx pin output low voltage

InFAULTx = 1 mA

150

mV

VEN_SWH

EN_SWx high level input voltage

EN_SW1, EN_SW2

2

V

VEN_SWL

EN_SWx high level input voltage

EN_SW1, EN_SW2

0.4

V

RDIS

Discharge resistance

VSW_IN = 5 V, EN_SW1/EN_SW2 = 0 V

100

Ω

THERMAL SHUTDOWN

TTRIP_BUCK

Thermal protection trip point

Rising temperature

160

°C

THYST_BUCK

Thermal protection hysteresis

20

°C

Figure 1. Power Switches Test Circuit and Voltage Waveforms

Figure 2. Response Time to Short Circuit Waveform

Figure 3. Output Voltage vs Current Limit Threshold

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