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

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.

Features

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

Typical Application

Applications

Cellular Phones
Pagers
Battery-Powered Systems
Frequency Synthesizers
Wireless Modems
Tracking/Sequencing Power Supplies

Packaging

Order Information

Part Number	Package	Temp	Price(1-99)	Price (1k)*
LT3028EDHC#PBF	5x3 DFN-16	E	$3.15	$2.65
LT3028EDHC#TRPBF	5x3 DFN-16	E		$2.75
LT3028EFE#PBF	TSSOP-16	E	$3.04	$2.55
LT3028EFE#TRPBF	TSSOP-16	E		$2.67
LT3028IDHC#PBF	5x3 DFN-16	I	$3.78	$3.18
LT3028IDHC#TRPBF	5x3 DFN-16	I		$3.28
LT3028IFE#PBF	TSSOP-16	I	$3.64	$3.06
LT3028IFE#TRPBF	TSSOP-16	I		$3.18

Demo Boards

Part Number	Description	Price
DC832A	LT3028DHC Demo Board \| Dual Input, Dual Output Linear Regulator, 2.3V ≤ VIN ≤ 20V, Vout1 = 2.5V/3.3V/5V @ 500mA, Vout2 = 2.5V/3.3V/5V @ 100mA	$125.00