LM3241_13 datasheet(4/23 Pages) TI1

部品番号	LM3241

部品情報	LM3241 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers

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LM3241

SNOSB38B – JANUARY 2009 – REVISED APRIL 2013

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ELECTRICAL CHARACTERISTICS

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Feedback voltage at minimum

VFB,MIN

PWM mode, VCON = 0.24V

0.58

0.6

0.62

setting

V

Feedback voltage at maximum

PWM mode, VCON = 1.36V, VIN =

VFB,MAX

3.332

3.4

3.468

setting

3.9V

EN = SW = VCON = 0V

ISHDN

Shutdown supply current

0.1

2

µA

(4)

PWM mode, No switching

IQ_PWM

PWM mode Quiescent current

VCON = 0V, FB = 1V

620

750

(5)

µA

ECO mode, No switching

IQ_ECO

ECO mode Quiescent current

VCON = 0.8V, FB = 2.05V

45

60

(5)

VIN = VGS = 3.6V

RDSON (P)

Pin-pin resistance for PFET

160

250

ISW = 200 mA

m

Ω

VIN = VGS = 3.6V

RDSON (N)

Pin-pin resistance for NFET

110

200

ISW = −200 mA

ILIM

PFET switch peak current limit

(6)

1300

1450

1600

mA

FOSC

Internal oscillator frequency

5.7

6

6.3

MHz

VIH

EN Logic high input threshold

1.2

V

VIL

EN Logic low input threshold

0.4

Gain

VCON to VOUT gain

0.24V

≤ VCON ≤ 1.36V

2.5

V/V

ICON

VCON pin leakage current

VCON = 1.0V

±1

µA

(1)

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

(2)

Min and Max limits are specified by design, test, or statistical analysis.

(3)

The parameters in the electrical characteristics table are tested under open loop conditions at VIN = 3.6V unless otherwise

specified. For performance over the input voltage range and closed-loop results, refer to the datasheet curves.

(4)

Shutdown current includes leakage current of PFET.

(5)

IQ specified here is when the part is not switching under test mode conditions. For operating quiescent current at no load, refer to

datasheet curves.

(6)

Current limit is built-in, fixed, and not adjustable.

4

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