LTC1707是High Efficiency Monolithic Synchronous Step-Down Switching Regulator

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LTC1707 - LTC1707是High Efficiency Monolithic Synchronous Step-Down Switching Regulator

LTC1707是Linear公司的一款内部开关电源降压产品，LTC1707是High Efficiency Monolithic Synchronous Step-Down Switching Regulator，本站介绍了LTC1707的封装应用图解、特点和优点、功能等，并给出了与LTC1707相关的凌力尔特元器件型号供参考。

LTC1707 - High Efficiency Monolithic Synchronous Step-Down Switching Regulator

LTC1707 - High Efficiency Monolithic Synchronous Step-Down Switching Regulator - Linear Technology（凌力尔特）

功能描述

The LTC?1707 is a high efficiency monolithic current mode synchronous buck regulator using a fixed frequency architecture. The operating supply range is from 8.5V down to 2.85V, making it suitable for both single and dual lithium-ion battery-powered applications. Burst Mode operation provides high efficiency at low load currents. 100% duty cycle provides low dropout operation, extending operating time in battery-powered systems.The switching frequency is internally set at 350kHz, allowing the use of small surface mount inductors. For noise sensitive applications it can be externally synchronized up to 550kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low preventing low frequency ripple from interfering with audio circuitry. Soft-start is provided by an external capacitor.The internal synchronous MOSFET switch increases efficiency and eliminates the need for an external Schottky diode, saving components and board space. Low output voltages down to 0.8V are easily achieved due to the 0.8V internal reference. The LTC1707 comes in an 8-lead SO package.

特点

600mA Output Current (VIN >/= 4V)

High Efficiency: Up to 96%

Constant Frequency: 350kHz Synchronizable to 550kHz

2.85V to 8.5V VIN Range

0.8V Feedback Reference Allows Low Voltage Outputs: 0.8V ?</= VOUT ?</= VIN

No Schottky Diode Required

1.19V ±1% Reference Output Pin

Selectable Burst Mode™ Operation/Pulse Skipping Mode

Low Dropout Operation: 100% Duty Cycle

Precision 2.7V Undervoltage Lockout

Current Mode Control for Excellent Line and Load Transient Response

Low Quiescent Current: 200µA

Shutdown Mode Draws Only 11µA Supply Current

Available in 8-Lead SO Package

应用

Cellular Telephones

Portable Instruments

Wireless Modems

RF Communications

Distributed Power Systems

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)
LTC1707CS8	SO-8	C	$2.44	$2.05
LTC1707CS8#PBF	SO-8	C	$2.44	$2.05
LTC1707CS8#TR	SO-8	C		$2.11
LTC1707CS8#TRPBF	SO-8	C		$2.11
LTC1707IS8	SO-8	I	$4.35	$3.05
LTC1707IS8#PBF	SO-8	I	$4.35	$3.05
LTC1707IS8#TR	SO-8	I		$3.11
LTC1707IS8#TRPBF	SO-8	I		$3.11