LTC1627是Monolithic Synchronous Step-Down Switching Regulator

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LTC1627 - LTC1627是Monolithic Synchronous Step-Down Switching Regulator

LTC1627是Linear公司的一款内部开关电源降压产品，LTC1627是Monolithic Synchronous Step-Down Switching Regulator，本站介绍了LTC1627的封装应用图解、特点和优点、功能等，并给出了与LTC1627相关的凌力尔特元器件型号供参考。

LTC1627 - Monolithic Synchronous Step-Down Switching Regulator

LTC1627 - Monolithic Synchronous Step-Down Switching Regulator - Linear Technology（凌力尔特）

功能描述

The LTC1627 is a monolithic current mode synchronous buck regulator using a fixed frequency architecture. The operating supply range is from 8.5V down to 2.65V, making it suitable for one or two lithium-ion battery-powered applications. Burst Mode operation provides high efficiency at low load currents. 100% duty cycle provides low dropout operation, which extends operating time in battery-operated systems. The operating frequency is internally set at 350kHz, allowing the use of small surface mount inductors. For switching noise sensitive applications it can be externally synchronized up to 525kHz. The SYNC/FCB control pin guarantees regulation of secondary windings regardless of load on the main output by forcing continuous operation. Burst Mode operation is inhibited during synchronization or when the SYNC/FCB pin is pulled low to reduce noise and RF interference. Soft-start is provided by an external capacitor. Optional bootstrapping enhances the internal switch drive for single lithium-ion cell applications. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode, saving components and board space. The LTC1627 comes in an 8-lead SO package.

特点

High Efficiency: Up to 95%

Constant Frequency 350kHz Operation

2.65V to 8.5V VIN Range

VOUT from 0.8V to VIN, IOUT to 500mA

No Schottky Diode Required

Synchronizable Up to 525kHz

Selectable Burst Mode™ Operation

Low Dropout Operation: 100% Duty Cycle

Precision 2.5V Undervoltage Lockout

Secondary Winding Regulation

Current Mode Operation for Excellent Line and Load Transient Response

Low Quiescent Current: 200µA

Shutdown Mode Draws Only 15µA Supply Current

±1.5% Reference Accuracy

Available in 8-Lead SO Package

应用

Cellular Telephones

Portable Instruments

Wireless Modems

RF Communications

Distributed Power Systems

Scanners

Single and Dual Cell Lithium

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC1627CS8	SO-8	C	$2.35	$2.05
LTC1627CS8#PBF	SO-8	C	$2.35	$2.05
LTC1627CS8#TR	SO-8	C		$2.11
LTC1627CS8#TRPBF	SO-8	C		$2.11
LTC1627IS8	SO-8	I	$3.55	$3.05
LTC1627IS8#PBF	SO-8	I	$3.55	$3.05
LTC1627IS8#TR	SO-8	I		$3.11
LTC1627IS8#TRPBF	SO-8	I		$3.11