Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX1534
Edited by the Electronicstalk Editorial Team on 10 December 2002
Three-output supply chip keeps notebooks
on
The MAX1534 is a high-efficiency triple-output power supply for keep-alive (always on) voltage rails.
The MAX1534 is a high-efficiency triple-output power supply for keep-alive (always on) voltage rails The MAX1534's 450mA buck-regulator with an internal current-limited 0.5ohm PMOS transistor steps down the battery or wall adapter supply rail to a fixed 5V or an adjustable output voltage
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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Two integrated low-voltage linear regulators follow this output and provide two independent preset output voltages of 3.3 and 1.8V, or adjustable output voltages.
A power-OK signal that indicates when all outputs are in regulation is also included.
The MAX1534's buck-regulator uses a peak current-limit, pulse-frequency modulation (PFM) architecture for highest light-load efficiency to conserve battery life, and high switching frequencies allow the use of tiny surface-mount inductors and output capacitors.
The low-dropout linear regulators use an internal P-channel pass transistor to deliver up to 160mA continuous current and to minimise supply current.
The MAX1534 is available in a small 16-pin thin QFN (4 x 4mm), occupying 33% less board space than discrete solutions.
Prices for the MAX1534 start at $2.90 (1000-up, FOB USA).
An evaluation kit is available with recommended external components to reduce design time.
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