LTC3414-EFE Linear Technology Corporation, LTC3414-EFE Datasheet

LTC3414-EFE

Manufacturer Part Number

LTC3414-EFE

Description

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC3414IFEPBF.pdf (16 pages)

Specifications of LTC3414-EFE

Case

TSSOP20

Date_code

0637+

Current page: 1 of 16
Download datasheet (269Kb)

FEATURES

TYPICAL APPLICATIO

■

APPLICATIO S

■

Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Protected by U.S. Patents, Including 5481178, 6580258, 6304066, 6127815, 6498466,

6611131, 6724174

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

High Efficiency: Up to 95%

4A Output Current

Low Quiescent Current: 64μA

Low R

Programmable Frequency: 300KHz to 4MHz

2.25V to 5.5V Input Voltage Range

±2% Output Voltage Accuracy

0.8V Reference Allows Low Output Voltage

Selectable Forced Continuous/Burst Mode

with Adjustable Burst Clamp

Synchronizable Switching Frequency

Low Dropout Operation: 100% Duty Cycle

Power Good Output Voltage Monitor

Overtemperature Protected

Available in 20-Lead Exposed TSSOP Package

Point-of-Load Regulation

Notebook Computers

Portable Instruments

Distributed Power Systems

2.7V TO 5.5V

1000pF

*Burst Mode OPERATION: C

DS(ON)

FORCED CONTINUOUS: C

2.2M

470pF

Figure 1. 2.5V/4A Step-Down Regulator

Internal Switch: 67mΩ

294k

ITH

OUT

SYNC/MODE

75k

OUT

RUN/SS

= (2) 100μF TDKC4532X5ROJ107M, R

= 470μF SANYO POSCAP 4TPB470M, R

LTC3414

110k

22μF

PGOOD

PGND

SGND

392k

0.47μH

Synchronous Step-Down Regulator

Operation

3414 F01a

ITH

= 12.1k

OUT

2.5V AT 4A

= 20k

OUT

DESCRIPTIO

The LTC

nous, step-down DC/DC converter utilizing a constant

frequency, current mode architecture. It operates from an

input voltage range of 2.25V to 5.5V and provides a

regulated output voltage from 0.8V to 5V while delivering

up to 4A of output current. The internal synchronous

power switch with 67mΩ on-resistance increases effi-

ciency and eliminates the need for an external Schottky

diode. Switching frequency is set by an external resistor or

can be synchronized to an external clock. 100% duty cycle

provides low dropout operation extending battery life in

portable systems. OPTI-LOOP

transient response to be optimized over a wide range of

loads and output capacitors.

The LTC3414 can be configured for either Burst Mode

operation or forced continuous operation. Forced continu-

ous operation reduces noise and RF interference while

Burst Mode operation provides high efficiency by reduc-

ing gate charge losses at light loads. In Burst Mode

operation, external control of the burst clamp level allows

the output voltage ripple to be adjusted according to the

requirements of the application.

3414 is a high efficiency monolithic synchro-

4A, 4MHz, Monolithic

100

0.001

LTC3414 Efficiency Curve

Burst Mode OPERATION

0.01

LOAD CURRENT (A)

compensation allows the

0.1

FORCED

CONTINUOUS

1.0

LTC3414

3414 F01b

3414fb

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