LTC1624CS datasheet(1/28 Pages) LINER

部件名	LTC1624CS

功能描述	High Efficiency SO-8 N-Channel Switching Regulator Controller

PDF	28 Pages

Scroll/Zoom	100%

制造商	LINER [Linear Technology]

网页	http://www.linear.com

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LTC1624

FEATURES

DESCRIPTION

s

N-Channel MOSFET Drive

s

Implements Boost, Step-Down, SEPIC

and Inverting Regulators

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Wide VIN Range: 3.5V to 36V Operation

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Wide VOUT Range: 1.19V to 30V in Step-Down

Configuration

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±1% 1.19V Reference

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Low Dropout Operation: 95% Duty Cycle

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200kHz Fixed Frequency

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Low Standby Current

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Very High Efficiency

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Remote Output Voltage Sense

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Logic-Controlled Micropower Shutdown

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Internal Diode for Bootstrapped Gate Drive

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Current Mode Operation for Excellent Line and

Load Transient Response

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Available in an 8-Lead SO Package

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Notebook and Palmtop Computers, PDAs

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Cellular Telephones and Wireless Modems

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Battery-Operated Digital Devices

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DC Power Distribution Systems

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Battery Chargers

TYPICAL APPLICATION

The LTC

®1624 is a current mode switching regulator

controller that drives an external N-channel power MOSFET

using a fixed frequency architecture. It can be operated in

all standard switching configurations including boost,

step-down, inverting and SEPIC. Burst Mode

TM operation

provides high efficiency at low load currents. A maximum

high duty cycle limit of 95% provides low dropout operation

which extends operating time in battery-operated systems.

The operating frequency is internally set to 200kHz, allowing

small inductor values and minimizing PC board space. The

operating current level is user-programmable via an external

current sense resistor. Wide input supply range allows

operation from 3.5V to 36V (absolute maximum).

A multifunction pin (ITH / RUN) allows external

compensation for optimum load step response plus

shutdown. Soft start can also be implemented with the

ITH/RUN pin to properly sequence supplies.

Figure 1. High Efficiency Step-Down Converter

+

SENSE–

ITH/RUN

VFB

GND

VIN

BOOST

TG

SW

LTC1624

1000pF

100pF

CC

470pF

RC

6.8k

D1

MBRS340T3

CB

0.1

µF

R2

35.7k

R1

20k

COUT

100

µF

10V

× 2

M1

Si4412DY

L1

10

µH

RSENSE

0.05

Ω

CIN

22

µF

35V

× 2

VOUT

3.3V

2A

VIN

4.8V TO 28V

1624 F01

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

Burst Mode is a trademark of Linear Technology Corporation.

High Efficiency SO-8

N-Channel Switching

Regulator Controller

APPLICATIONS

类似零件编号 - LTC1624CS

制造商	部件名	数据表	功能描述
Linear Technology	LTC1624	205Kb / 24P	High Voltage, Current Mode Switching Regulator Controller with Programmable Operating Frequency
	LTC1624	477Kb / 36P	Wide Input Range, No RSENSE Current Mode Boost, Flyback and SEPIC Controller
	LTC1624	764Kb / 32P	Wide Input Range, No RSENSE??Current Mode Boost, Flyback and SEPIC Controller
	LTC1624	408Kb / 28P	High Efficiency SO-8 N-Channel Switching Regulator Controller

More results

类似说明 - LTC1624CS

制造商	部件名	数据表	功能描述
National Semiconductor ...	LM3477	815Kb / 23P	High Efficiency High-Side N-Channel Controller for Switching Regulator
	LM3478	624Kb / 21P	High Efficiency Low-Side N-Channel Controller for Switching Regulator
	LM3487	2Mb / 22P	High Efficiency High-Side N-Channel Controller for Switching Regulator
	LM3478	507Kb / 22P	High Efficiency Low-Side N-Channel Controller for Switching Regulator
Texas Instruments	LM3478	1Mb / 32P	High-Efficiency Low-Side N-Channel Controller for Switching Regulator
Texas Instruments	LM3477	1Mb / 34P	High Efficiency High-Side N-Channel Controller for Switching Regulator
Linear Technology	LTC1624	408Kb / 28P	High Efficiency SO-8 N-Channel Switching Regulator Controller
Texas Instruments	LM3477	1Mb / 35P	LM3477 High Efficiency High-Side N-Channel Controller for Switching Regulator
	LM3478	1Mb / 38P	LM3478x/-Q1 High-Efficiency Low-Side N-Channel Controller for Switching Regulator
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