TPS62743_16 datasheet(5/25 Pages) TI1

No de pièce	TPS62743

Description	300/400 mA High Efficiency Buck Converter with Ultra-low Quiescent Current

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Fabricant	TI1 [Texas Instruments]

Site Internet	http://www.ti.com

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TPS62743, TPS627431

www.ti.com

SLVSCQ0A – JUNE 2015 – REVISED MAY 2016

Product Folder Links: TPS62743 TPS627431

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(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report, SPRA953.

8.4 Thermal Information

THERMAL METRIC(1)

TPS62743

UNIT

YFP

8 PINS

RθJA

Junction-to-ambient thermal resistance

103

°C/W

RθJCtop

Junction-to-case (top) thermal resistance

1.0

°C/W

RθJB

Junction-to-board thermal resistance

20

°C/W

ψJT

Junction-to-top characterization parameter

0.3

°C/W

ψJB

Junction-to-board characterization parameter

20

°C/W

RθJCbot

Junction-to-case (bottom) thermal resistance

N/A

°C/W

8.5 Electrical Characteristics

VIN = 3.6V, TA = –40°C to 85°C typical values are at TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY

IQ

Operating

quiescent current

EN = VIN, IOUT = 0µA, VOUT = 1.8V, device not switching

360

1800

nA

EN = VIN, IOUT = 0mA, VOUT = 1.8V , device switching

460

ISD

Shutdown current

EN = GND, shutdown current into VIN

70

1000

nA

VTH_ UVLO+

Undervoltage

lockout threshold

Rising VIN

2.075

2.15

V

VTH_UVLO-

Falling VIN

1.925

2

INPUTS (EN, VSEL1-3 )

VIH TH

High level input

threshold

2.2V

≤ VIN ≤ 5.5V

1.1

V

VIL TH

Low level input

threshold

2.2V

≤ VIN ≤ 5.5V

0.4

V

IIN

Input bias Current

10

25

nA

POWER SWITCHES

RDS(ON)

High side

MOSFET on-

resistance

IOUT = 50mA

0.45

1.12

Ω

Low Side

MOSFET on-

resistance

0.22

0.65

ILIMF

High side

MOSFET switch

current limit

TPS62743 3.0V

≤ VIN ≤ 5.5V

480

600

720

mA

TPS627431 3.0V

≤ VIN ≤ 5.5V

590

650

800

Low side MOSFET

switch current limit

TPS62743

600

TPS627431

650

OUTPUT VOLTAGE DISCHARGE

RDSCH_VOS

MOSFET on-

resistance

EN = GND, IVOS = -10mA into VOS pin

30

65

Ω

IIN_VOS

Bias current into

VOS pin

EN = VIN, VOUT = 2V

40

1010

nA

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