LM3691TLX-1.0 datasheet(6/29 Pages) TI1

No. de pieza	LM3691TLX-1.0

Descripción Electrónicos	High-Accuracy, Miniature 1-A Step-Down DC-DC Converter

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Fabricante Electrónico	TI1 [Texas Instruments]

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LM3691

SNVS506J – MAY 2008 – REVISED DECEMBER 2015

www.ti.com

7.5 Electrical Characteristics

Unless otherwise specified, specifications apply to the LM3691 open-loop Typical Application Circuit with VIN = EN = 3.6 V;

typical limits are for TA = 25°C and minimum and maximum limits apply over the operating ambient temperature range (−30°C

≤ TA = TJ ≤ +85°C).

(1) (2) (3)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

PWM mode

–1%

1%

no load VOUT = 1.1 V to 3.3 V

VFB

Feedback voltage

PWM mode

–10

10

mV

no load VOUT = 0.75 V to 1 V

ISHDN

Shutdown supply current

EN = 0 V

0.03

1

µA

IQ_ECO

ECO mode IQ

ECO mode

64

80

µA

IQ_PWM

PWM mode IQ

PWM mode

490

600

µA

RDSON (P)

Pin-pin resistance for PFET

VIN = VGS = 3.6 V, IO = 200 mA

160

250

m

Ω

RDSON (N)

Pin-pin resistance for NFET

VIN = VGS = 3.6 V, IO = −200 mA

115

180

m

Ω

ILIM

Switch peak current limit

Open loop

1250

1500

1700

mA

VIH

Logic high input

1.2

V

VIL

Logic low input

0.4

V

IEN,MODE

Input current

0.01

1

µA

FSW

Switching frequency

PWM mode

3.6

4

4.4

MHz

VIN rising, TA = 25°C

2.2

2.29

V

VON

UVLO threshold(4)

VIN falling

2.1

V

TSTARTUP

Start time(5)

TA = 25°C

70

145

300

µs

(1)

All voltages are with respect to the potential at the GND pin.

(2)

Minimum and maximum limits are specified by design, test or statistical analysis. Typical numbers represent the most likely norm.

(3)

The parameters in the electrical characteristic table are tested under open-loop conditions at VIN = 3.6 V unless otherwise specified. For

performance over the input voltage range and closed loop condition, refer to the datasheet curves.

(4)

The UVLO rising threshold minus the falling threshold is always positive.

(5)

Specified by design. Not production tested.

6

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