LT1611是Inverting 1.4MHz Switching Regulator in 5-Lead SOT-23

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LT1611 - LT1611是Inverting 1.4MHz Switching Regulator in 5-Lead SOT-23

LT1611是Linear公司的一款负输出稳压器产品，LT1611是Inverting 1.4MHz Switching Regulator in 5-Lead SOT-23，本站介绍了LT1611的封装应用图解、特点和优点、功能等，并给出了与LT1611相关的凌力尔特元器件型号供参考。

LT1611 - Inverting 1.4MHz Switching Regulator in 5-Lead SOT-23

LT1611 - Inverting 1.4MHz Switching Regulator in 5-Lead SOT-23 - Linear Technology（凌力尔特）

功能描述

The LT1611 is the industry's first inverting 5-lead SOT-23 current mode DC/DC converter. Intended for use in small, low power applications, it operates from an input voltage as low as 1.1V and switches at 1.4MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Its small size and high switching frequency enable the complete DC/DC converter function to consume less than 0.25 square inches of PC board area. Capable of generating -5V at 150mA from a 5V supply or -5V at 100mA from a 3V supply, the LT1611 replaces nonregulated "charge pump" solutions in many applications. The LT1611 operates in a dual inductor inverting topology which filters the input side as well as the output side of the DC/DC converter. Fixed frequency switching ensures a clean output free from low frequency noise typically present with charge pump solutions. No load quiescent current of the LT1611 is 3mA, while in shutdown quiescent current drops to 0.5μA. The 36V switch allows VIN to VOUT differential of up to 33V. The LT1611 is available in the 5-lead SOT-23 package.

特点

Very Low Noise: 1mVP–P Output Ripple

–5V at 150mA from a 5V Input

Better Regulation Than a Charge Pump

Effective Output Impedance: 0.14Ohms

Uses Tiny Capacitors and Inductors

Internally Compensated

Fixed Frequency 1.4MHz Operation

Low Shutdown Current: <1μA

Low VCESAT Switch: 300mV at 300mA

Tiny 5-Lead SOT-23 Package?

应用

MR Head Bias

Digital Camera CCD Bias

LCD Bias

GaAs FET Bias

Positive-to-Negative Conversion

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)
LT1611CS5	SOT-23	C	$2.46
LT1611CS5#PBF	SOT-23	C	$2.46
LT1611CS5#TR	SOT-23	C	$2.46	$2.00
LT1611CS5#TRM	SOT-23	C	$2.46	$2.02
LT1611CS5#TRMPBF	SOT-23	C	$2.46	$2.02
LT1611CS5#TRPBF	SOT-23	C	$2.46	$2.00