LT1777是Low Noise Step-Down Switching Regulator

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LT1777 - LT1777是Low Noise Step-Down Switching Regulator

LT1777是Linear公司的一款超低噪声稳压器产品，LT1777是Low Noise Step-Down Switching Regulator，本站介绍了LT1777的封装应用图解、特点和优点、功能等，并给出了与LT1777相关的凌力尔特元器件型号供参考。

LT1777 - Low Noise Step-Down Switching Regulator

LT1777 - Low Noise Step-Down Switching Regulator - Linear Technology（凌力尔特）

功能描述

The LT®1777 is a Buck (step-down) regulator designed for noise sensitive applications. It contains a dI/dt limiting circuit programmed via a small external inductor in the switching path. Internal circuitry also generates controlled dV/dt ramp rates.The monolithic die includes all oscillator, control and protection circuitry. The part can accept operating input voltages as high as 48V, and contains an output switch rated at 700mA peak current. Current mode control offers excellent dynamic input supply rejection and short-circuit protection. The internal control circuitry is normally powered via the VCC pin, thereby minimizing power drawn directly from the VIN supply (see Applications Information). The fused-lead SO16 package and 100kHz switching frequency allow for minimal PC board area requirements.

特点

Programmable dI/dt Limit

Internally Limited dV/dt

High Input Voltage: 48V Max

700mA Peak Switch Rating

True Current Mode Control

100kHz Fixed Operating Frequency

Synchronizable to 250kHz

Low Supply Current in Shutdown: 30µA

Low Thermal Resistance 16-Pin SO Package

应用

Automotive Cellular and GPS Receivers

Telecom Power Supplies

Industrial Instrument Power Supplies

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)
LT1777CS	SO-16	C	$3.10	$2.65
LT1777CS#PBF	SO-16	C	$3.10	$2.65
LT1777CS#TR	SO-16	C		$2.71
LT1777CS#TRPBF	SO-16	C		$2.71
LT1777IS	SO-16	I	$3.75	$3.15
LT1777IS#PBF	SO-16	I	$3.75	$3.15
LT1777IS#TR	SO-16	I		$3.21
LT1777IS#TRPBF	SO-16	I		$3.21