Very Low Dropout Regulator outputs 500 mA.
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Press Release Summary:
Featuring input voltage capability down to 0.9 V and adjustable output voltage down to 0.2 V, Model LT3021 operates across entire voltage range of single cell alkaline and NiMH batteries. Regulator maintains 160 mV dropout voltage up to 500 mA of operating current, and offers micropower operation with 120 µA of quiescent current and less than 3 µA in shutdown. Unit includes 0.05% line regulation, 0.2% load regulation, and reverse-battery protection.
Original Press Release:
500mA VLDO(TM) Operates Down to 0.2V from 0.9V Input
MILPITAS, CA - April 7, 2005 - Linear Technology Corporation announces the LT3021, the power industry's first 500mA VLDO (very low dropout regulator), featuring input voltage capability down to 0.9V and adjustable output voltage down to 0.2V. The LT3021's low input voltage enables operation across the entire voltage range of both single cell alkaline and NiMH batteries (1.4V to 0.9V). This low VIN capability is also important for emerging applications using a 1.5V main rail that require output voltages from 1.25V to 0.5V to drive low voltage microprocessor and microcontroller cores. The LT3021 maintains its 160mV dropout voltage up to 500mA of operating current, making it ideal for applications requiring a low VIN to VOUT differential. Additionally, it offers micropower operation with only 120uA of quiescent current and less than 3uA in shutdown, maximizing run time in handheld applications.
The LT3021 regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 3.3uF. Other LT3021 features include 0.05% line regulation and 0.2% load regulation. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting with hysteresis, and reverse-current protection. The LT3021 regulator is available in a low profile (0.75mm) 16-lead DFN 5mm x 5mm package with exposed pad, and an 8-lead SOIC package, both offering compact solution footprints.
Both LT3021EDH (16-lead DFN) and the LT3021ES8 (SOIC-8) are available from stock. 1,000-piece pricing starts at $2.25 each.
Summary of Features: LT3021
o VIN Range: 0.9V to 10V
o VOUT Range: 0.2V to 9.5V (adjustable)
o Dropout Voltage: 160mV
o Output Current: 500mA
o Stable with Low ESR, Ceramic Output Capacitors (3.3uF Minimum)
o 0.2% Load Regulation from 0mA to 500mA
o Quiescent Current: 120uA ISD < 3uA
o Current Limit Protection
o Reverse-Battery Protection, No Reverse Current
o 16-Lead DFN (5mm x 5mm x 0.75mm) Package
o 8-Lead SOIC Package
COMPANY BACKGROUND: Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
For more information, contact:
Doug Dickinson, Media Relations Manager
Linear Technology Corporation
1630 McCarthy Boulevard
Milpitas, CA 95035-7417
ddickinson@linear.com
408-432-1900
