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LT1956 - LT1956是High Voltage, 1.5A, 500kHz Step-Down Switching Regulators

LT1956是LINEAR凌力尔特公司的一款内部开关电源降压产品，LT1956是LT1956是High Voltage, 1.5A, 500kHz Step-Down Switching Regulators，本站介绍了LT1956的封装应用图解、特点和优点、功能等，并给出了与LT1956相关的LINEAR元器件型号供参考。

LT1956 - LT1956是High Voltage, 1.5A, 500kHz Step-Down Switching Regulators - 内部开关电源降压 - 电源管理 - 凌力尔特

LT1956 - High Voltage, 1.5A, 500kHz Step-Down Switching Regulators

LT1956 - High Voltage, 1.5A, 500kHz Step-Down Switching Regulators - Linear Technology（凌力尔特）

功能描述

The LT?1956/LT1956-5 are 500kHz monolithic buck switching regulators with an input voltage capability up to 60V. A high efficiency 1.5A, 0.2 Ohm switch is included on the die along with all the necessary oscillator, control and logic circuitry. A current mode architecture provides fast transient response and good loop stability.

Special design techniques and a new high voltage process achieve high efficiency over a wide input range. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch. Patented circuitry maintains peak switch current over the full duty cycle range*. A shutdown pin reduces supply current to 25μA and the device can be externally synchronized from 580kHz to 700kHz with a logic level input.

The LT1956/LT1956-5 are available in fused-lead 16-pin SSOP and thermally enhanced TSSOP packages.

特点

Wide Input Range: 5.5V to 60V

1.5A Peak Switch Current

Small 16-Pin SSOP Package or Thermally Enhanced TSSOP Package

Saturating Switch Design: 0.2 Ohms

Peak Switch Current Maintained Over Full Duty Cycle Range

Constant 500kHz Switching Frequency

Effective Supply Current: 2.5mA

Shutdown Current: 25µA

1.2V Feedback Reference (LT1956)

5V Fixed Output (LT1956-5)

Easily Synchronizable

Cycle-by-Cycle Current Limiting

应用

High Voltage, Industrial and Automotive

Portable Computers

Battery-Powered Systems

Battery Chargers

Distributed Power Systems

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)
LT1956EFE	TSSOP-16	E	$5.36	$3.75
LT1956EFE-5	TSSOP-16	E	$5.36	$3.75
LT1956EFE-5#PBF	TSSOP-16	E	$5.36	$3.75
LT1956EFE-5#TR	TSSOP-16	E		$3.87
LT1956EFE-5#TRPBF	TSSOP-16	E		$3.87
LT1956EFE#PBF	TSSOP-16	E	$5.36	$3.75
LT1956EFE#TR	TSSOP-16	E		$3.87
LT1956EFE#TRPBF	TSSOP-16	E		$3.87
LT1956EGN	SSOP-16	E	$4.32	$3.65
LT1956EGN-5	SSOP-16	E	$4.32	$3.65
LT1956EGN-5#PBF	SSOP-16	E	$4.32	$3.65
LT1956EGN-5#TR	SSOP-16	E		$3.71
LT1956EGN-5#TRPBF	SSOP-16	E		$3.71
LT1956EGN#PBF	SSOP-16	E	$4.32	$3.65
LT1956EGN#TR	SSOP-16	E		$3.71
LT1956EGN#TRPBF	SSOP-16	E		$3.71
LT1956IFE	TSSOP-16	I	$6.36	$4.45
LT1956IFE-5	TSSOP-16	I	$6.36	$4.45
LT1956IFE-5#PBF	TSSOP-16	I	$6.36	$4.45
LT1956IFE-5#TR	TSSOP-16	I		$4.57
LT1956IFE-5#TRPBF	TSSOP-16	I		$4.57
LT1956IFE#PBF	TSSOP-16	I	$6.36	$4.45
LT1956IFE#TR	TSSOP-16	I		$4.57
LT1956IFE#TRPBF	TSSOP-16	I		$4.57
LT1956IGN	SSOP-16	I	$5.15	$4.35
LT1956IGN-5	SSOP-16	I	$5.15	$4.35
LT1956IGN-5#PBF	SSOP-16	I	$5.15	$4.35
LT1956IGN-5#TR	SSOP-16	I		$4.41
LT1956IGN-5#TRPBF	SSOP-16	I		$4.41
LT1956IGN#PBF	SSOP-16	I	$5.15	$4.35
LT1956IGN#TR	SSOP-16	I		$4.41
LT1956IGN#TRPBF	SSOP-16	I		$4.41

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