LCVT datasheet(1/24 Pages) LINER

Teilenummer	LCVT

Bauteilbeschribung	36V, 2A, 2.8MHz Step-Down Switching Regulator

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Hersteller	LINER [Linear Technology]

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LT3684

1

3684f

36V, 2A, 2.8MHz Step-Down

Switching Regulator

The LT

®3684isanadjustablefrequency(300kHzto2.8MHz)

monolithic buck switching regulator that accepts input

voltages up to 34V (36V maximum). A high efﬁciency

0.18

Ω switch is included on the die along with a boost

Schottky diode and the necessary oscillator, control and

logic circuitry. Current mode topology is used for fast

transient response and good loop stability. The LT3684’s

high operating frequency allows the use of small, low cost

inductors and ceramic capacitors resulting in low output

ripple while keeping total solution size to a minimum.

The low current shutdown mode reduces input supply

current to less than 1µA while a resistor and capacitor on

the RUN/SS pin provide a controlled output voltage ramp

(soft-start). A power good ﬂag signals when VOUT reaches

90% of the programmed output voltage. The LT3684 is

available in 10-Pin MSOP and 3mm

× 3mm DFN packages

with Exposed Pads for low thermal resistance.

■ Automotive Battery Regulation

■ Power for Portable Products

■ Distributed Supply Regulation

■ Industrial Supplies

■ Wall Transformer Regulation

■ Wide Input Range: 3.6V to 34V Operating,

36V Maximum

■ 2A Maximum Output Current

■ Adjustable Switching Frequency: 300kHz to 2.8MHz

■ Low Shutdown Current: IQ < 1µA

■ Integrated Boost Diode

■ Power Good Flag

■ Saturating Switch Design: 0.18

Ω On-Resistance

■ 1.265V Feedback Reference Voltage

■ Output Voltage: 1.265V to 20V

■ Soft-Start Capability

■ Small 10-Pin Thermally Enhanced MSOP and

(3mm

× 3mm) DFN Packages

3.3V Step-Down Converter

Efﬁciency

FEATURES

DESCRIPTION

APPLICATIONS

TYPICAL APPLICATION

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

SW

BIAS

FB

VC

PG

RT

VIN

BD

VIN

4.5V TO

34V

VOUT

3.3V

2A

4.7

µF

0.47

µF

330pF

22

µF

200k

16.2k

60.4k

4.7

µH

324k

GND

OFF ON

LT3684

3684 TA01

RUN/SS

BOOST

LOAD CURRENT (A)

0

30

40

50

60

70

80

90

0.5

1

1.5

2

3684 TA01b

VIN = 12V

VOUT = 3.3V

L = 4.7

µH

f = 800kHz

Ähnliche Beschreibung - LCVT

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Linear Technology	LT3684	336Kb / 24P	36V, 2A, 2.8MHz Step-Down Switching Regulator
	LT3481	313Kb / 24P	36V, 2A, 2.8MHz Step-Down Switching Regulator with 50A Quiescent Current
	LT3681	378Kb / 24P	36V, 2A, 2.8MHz Step-Down Switching Regulator with Integrated Power Schottky Diode
	LT3681	372Kb / 24P	36V, 2A, 2.8MHz Step-Down Switching Regulator with Integrated Power Schottky Diode
	LT3481	299Kb / 24P	36V, 2A, 2.8MHz Step-Down Switching Regulator with 50關A Quiescent Current
	LT1912	310Kb / 24P	36V, 2A, 500kHz Step-Down Switching Regulator
	LT1912	375Kb / 24P	36V, 2A, 500kHz Step-Down Switching Regulator
	LT3685	281Kb / 24P	36V, 2A, 2.4MHz Step-Down Switching Regulator
	LT3685EMSE	281Kb / 24P	36V, 2A, 2.4MHz Step-Down Switching Regulator
	LT3685	812Kb / 24P	36V, 2A, 2.4MHz Step-Down Switching Regulator

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