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LT3028 - LT3028是Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulators with Independent Inputs

LT3028是LINEAR凌力尔特公司的一款正稳压器产品，LT3028是LT3028是Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulators with Independent Inputs，本站介绍了LT3028的封装应用图解、特点和优点、功能等，并给出了与LT3028相关的LINEAR元器件型号供参考。

LT3028 - LT3028是Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulators with Independent Inputs - 正稳压器 - 电源管理 - 凌力尔特

LT3028 - Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulators with Independent Inputs

LT3028 - Dual 100mA/500mA Low Dropout, Low Noise, Micropower Regulators with Independent Inputs - Linear Technology（凌力尔特）

功能描述

The LT3028 is a dual, micropower, low noise, low dropout regulator with independent inputs. With an external 0.01µF bypass capacitor, output noise is a low 20µVRMS over a 10Hz to 100kHz bandwidth. Designed for use in battery-powered systems, the low 30µA quiescent current per output makes it an ideal choice. In shutdown, quiescent current drops to less than 0.1µA. Shutdown control is independent for each output, allowing for flexibility in power management. The device is capable of operating over an input voltage range of 1.8V to 20V. Output 1 can supply 500mA of output current with a dropout voltage of 320mV. The device can supply 100mA of output current from Output 2 with a dropout voltage of 300mV. Quiescent current is well controlled in dropout.

The LT3028 regulator is stable with output capacitors as low as 1µF for the 100mA output and 3.3µF for the 500mA output. Small ceramic capacitors can be used without the series resistance required by other regulators.

Internal protection circuitry includes reverse-battery protection, current limiting and thermal limiting protection. The device is available as an adjustable device with a 1.22V reference voltage. The LT3028 regulator is available in the thermally enhanced 16-lead TSSOP and 16-lead, low profile (5mm × 3mm × 0.75mm) DFN packages.

Protected by U.S. Patents including 6118263, 6144250.

特点

Low Noise: 20µVRMS (10Hz to 100kHz)

Low Quiescent Current: 30µA/Output

Independent Inputs

Wide Input Voltage Range: 1.8V to 20V

Output Current: 100mA/500mA

Very Low Shutdown Current: <0.1µA

Low Dropout Voltage: 300mV/320mV at 100mA/500mA

Adjustable Outputs from 1.22V to 20V

Stable with as Low as 1µF/3.3µF Output Capacitor

Stable with Aluminum, Tantalum or Ceramic Capacitors

Reverse-Battery Protected

No Protection Diodes Needed

Overcurrent and Overtemperature Protected

Tracking/Sequencing Capability

Thermally Enhanced 16-Lead TSSOP and 16-Lead (5mm × 3mm) DFN Packages

应用

Cellular Phones

Pagers

Battery-Powered Systems

Frequency Synthesizers

Wireless Modems

Tracking/Sequencing 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)
LT3028EDHC	5x3 DFN-16	E	$3.15	$2.65
LT3028EDHC#PBF	5x3 DFN-16	E	$3.15	$2.65
LT3028EDHC#TR	5x3 DFN-16	E		$2.75
LT3028EDHC#TRPBF	5x3 DFN-16	E		$2.75
LT3028EFE	TSSOP-16	E	$3.04	$2.55
LT3028EFE#PBF	TSSOP-16	E	$3.04	$2.55
LT3028EFE#TR	TSSOP-16	E		$2.67
LT3028EFE#TRPBF	TSSOP-16	E		$2.67
LT3028IDHC	5x3 DFN-16	I	$3.78	$3.18
LT3028IDHC#PBF	5x3 DFN-16	I	$3.78	$3.18
LT3028IDHC#TR	5x3 DFN-16	I		$3.28
LT3028IDHC#TRPBF	5x3 DFN-16	I		$3.28
LT3028IFE	TSSOP-16	I	$3.64	$3.06
LT3028IFE#PBF	TSSOP-16	I	$3.64	$3.06
LT3028IFE#TR	TSSOP-16	I		$3.18
LT3028IFE#TRPBF	TSSOP-16	I		$3.18

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