LTC3407EMSE2TRPBF Linear Technology Corporation, LTC3407EMSE2TRPBF Datasheet

LTC3407EMSE2TRPBF

Manufacturer Part Number

LTC3407EMSE2TRPBF

Description

MSOP

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC3407EMSE2TRPBF.pdf (16 pages)

Specifications of LTC3407EMSE2TRPBF

Date_code

09+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3407EMSE2TRPBF

Manufacturer:

SHARP

Quantity:

5 693

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FEATURES

APPLICATIONS

TYPICAL APPLICATION

OUT2

AT 800mA

High Efﬁ ciency: Up to 95%

Very Low Quiescent Current: Only 40μA

2.25MHz Constant-Frequency Operation

High Switch Current: 1.2A on Each Channel

No Schottky Diodes Required

Low R

Current Mode Operation for Excellent Line

and Load Transient Response

Short-Circuit Protected

Low Dropout Operation: 100% Duty Cycle

Ultralow Shutdown Current: I

Output Voltages from 5V down to 0.6V

Power-On Reset Output

Externally Synchronizable Oscillator

Small Thermally Enhanced MSOP and 3mm × 3mm

DFN Packages

PDAs/Palmtop PCs

Digital Cameras

Cellular Phones

Portable Media Players

PC Cards

Wireless and DSL Modems

= 2.5V

10μF

Figure 1. 2.5V/1.8V at 800mA Step-Down Regulators

TO 5.5V

= 2.5V*

DS(ON)

C1, C2, C3: TAIYO YUDEN JMK316BJ106ML

C5, 22pF

887k

Internal Switches: 0.35Ω

10μF

2.2μH

280k

OUT

CONNECTED TO V

MODE/SYNC

SW2

RUN2

FB2

LTC3407-2

GND

RUN1

FOR V

< 1μA

SW1

POR

L1, L2: MURATA LQH32CN2R2M33

FB1

301k

2.8V

2.2μH

100k

C4, 22pF

RESET

604k

10μF

AT 800mA

OUT1

= 1.8V

3407 TA01

Dual Synchronous, 800mA,

DESCRIPTION

The LTC

nous step down DC/DC converter. Intended for low power

applications, it operates from 2.5V to 5.5V input voltage

range and has a constant 2.25MHz switching frequency,

allowing the use of tiny, low cost capacitors and inductors

with a proﬁ le ≤1.2mm. Each output voltage is adjustable

from 0.6V to 5V. Internal synchronous 0.35Ω, 1.2A power

switches provide high efﬁ ciency without the need for

external Schottky diodes.

A user selectable mode input is provided to allow the user

to trade-off noise ripple for low power efﬁ ciency. Burst

Mode

while pulse-skipping mode provides low noise ripple at

light loads.

To further maximize battery life, the P-channel MOSFETs

are turned on continuously in dropout (100% duty cycle),

and both channels draw a total quiescent current of only

40μA. In shutdown, the device draws <1μA.

L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective

owners.

operation provides high efﬁ ciency at light loads,

3407-2 is a dual, constant-frequency, synchro-

2.25MHz Step-Down

100

LTC3407-2 Efﬁ ciency Curve

Burst Mode OPERATION

NO LOAD ON OTHER CHANNEL

DC/DC Regulator

= 3.3V

LOAD CURRENT (mA)

100

1.8V

LTC3407-2

2.5V

3407 TA02

1000

34072fc

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