LTC3407EDD#TRPBF datasheet, PDF

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LTC3407EDD#TRPBF: DescriptionConv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5V 0.6A/0.6A 10-Pin DFN EP T/R; File Size214KB，16 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC3407EDD#TRPBF Overview

Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5V 0.6A/0.6A 10-Pin DFN EP T/R

LTC3407EDD#TRPBF Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
Type	Synchronous Step Down
Output Type	Adjustable
Switching Frequency (kHz)	1200 to 1800
Switching Regulator	Yes
Number of Outputs	2
Output Voltage (V)	0.6 to 5
Maximum Output Current (A)	0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6\|0.6
Minimum Input Voltage (V)	2.5
Maximum Input Voltage (V)	5.5
Operating Supply Voltage (V)	2.5 to 5.5
Typical Quiescent Current (uA)	40
Line Regulation	0.5%/V
Load Regulation	0.5%(Typ)
Efficiency (%)	96
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	85
Supplier Temperature Grade	Extended
Packaging	Tape and Reel
Pin Count	10
Standard Package Name	DFN
Supplier Package	DFN EP
Mounting	Surface Mount
Package Height	0.75(Max)
Package Length	3
Package Width	3
PCB changed	10
Lead Shape	No Lead

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FEATURES

LTC3407

Dual Synchronous, 600mA,

1.5MHz Step-Down

DC/DC Regulator

DESCRIPTION

The LTC

3407 is a dual, constant frequency, synchronous

step down DC/DC converter. Intended for low power ap-

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

range and has a constant 1.5MHz switching frequency,

allowing the use of tiny, low cost capacitors and inductors

2mm or less in height. Each output voltage is adjustable

from 0.6V to 5V. Internal synchronous 0.35Ω, 1A power

switches provide high efﬁciency without the need for

external Schottky diodes.

A user selectable mode input is provided to allow the user

to trade-off ripple noise for low power efﬁciency. Burst

Mode

operation provides high efﬁciency at light loads,

while pulse-skipping mode provides low ripple noise 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.

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.

High Efﬁciency: Up to 96%

Very Low Quiescent Current: Only 40μA

1.5MHz Constant Frequency Operation

High Switch Current: 1A on Each Channel

No Schottky Diodes Required

Low R

DS(ON)

Internal Switches: 0.35Ω

Current Mode Operation for Excellent Line

and Load Transient Response

Short-Circuit Protected

Low Dropout Operation: 100% Duty Cycle

Ultralow Shutdown Current: I

< 1μA

Output Voltages from 5V down to 0.6V

Power-On Reset Output

Externally Synchronizable Oscillator

Small Thermally Enhanced MSOP and 3mm

3mm

DFN Packages

APPLICATIONS

PDAs/Palmtop PCs

Digital Cameras

Cellular Phones

Portable Media Players

PC Cards

Wireless and DSL Modems

TYPICAL APPLICATION

= 2.5V

TO 5.5V

10μF

RUN2

RUN1

POR

2.2μH

SW1

C4, 22pF

100k

RESET

EFFICIENCY (%)

LTC3407 Efﬁciency Curve

100

442k

887k

10μF

= 3.3V

Burst Mode OPERATION

NO LOAD ON OTHER CHANNEL

100

LOAD CURRENT (mA)

1000

3407 TA02

2.5V

1.8V

MODE/SYNC

2.2μH

SW2

C5, 22pF

LTC3407

OUT2

= 2.5V

AT 600mA

OUT1

= 1.8V

AT 600mA

10μF

887k

FB2

280k

GND

FB1

C1, C2, C3: TAIYO YUDEN JMK316BJ106ML

L1, L2: MURATA LQH32CN2R2M33

3407 TA01

Figure 1. 2.5V/1.8V at 600mA Step-Down Regulators

3407fa

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