LM2734_15 datasheet(5/37 Pages) TI

Part #	LM2734

Description	LM2734 Thin SOT 1-A Load Step-Down DC-DC Regulator

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Manufacturer	TI [Texas Instruments]

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LM2734

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SNVS288J – SEPTEMBER 2004 – REVISED DECEMBER 2014

6.5 Electrical Characteristics

VIN = 5V, VBOOST - VSW = 5V unless otherwise specified. Datasheet min/max specification limits are ensured by design, test, or

statistical analysis.

TJ = 25°C

TJ = -40°C to 125°C

PARAMETER

TEST CONDITIONS

UNIT

MIN(1)

TYP(2)

MAX(1)

MIN

TYP

MAX

VFB

Feedback Voltage

0.800

0.784

0.816

V

ΔVFB/Δ

Feedback Voltage Line

VIN = 3V to 20V

0.01

% / V

VIN

Regulation

Feedback Input Bias

Sink/Source

IFB

10

250

nA

Current

Undervoltage Lockout

VIN Rising

2.74

2.90

UVLO

Undervoltage Lockout

VIN Falling

2.3

2.0

V

UVLO Hysteresis

0.44

0.30

0.62

LM2734X

1.6

1.2

1.9

FSW

Switching Frequency

MHz

LM2734Y

0.55

0.40

0.66

LM2734X

92

85%

DMAX

Maximum Duty Cycle

LM2734Y

96

90%

LM2734X

2%

DMIN

Minimum Duty Cycle

LM2734Y

1%

RDS(ON) Switch ON Resistance

VBOOST - VSW = 3V

300

600

m

Ω

ICL

Switch Current Limit

VBOOST - VSW = 3V

1.7

1.2

2.5

A

IQ

Quiescent Current

Switching

1.5

2.5

mA

Quiescent Current

VEN = 0V

30

nA

(shutdown)

LM2734X (50% Duty

2.5

3.5

Cycle)

IBOOST

Boost Pin Current

mA

LM2734Y (50% Duty

1.0

1.8

Cycle)

Shutdown Threshold

VEN Falling

0.4

Voltage

VEN_TH

V

Enable Threshold

VEN Rising

1.8

Voltage

IEN

Enable Pin Current

Sink/Source

10

nA

ISW

Switch Leakage

40

nA

(1)

Specified to Average Outgoing Quality Level (AOQL).

(2)

Typicals represent the most likely parametric norm.

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