GENERAL DESCRIPTION
Two integrated low-voltage linear regulators follow this output and provide two independent preset output voltages of 3.3V and 1.8V, or adjustable output voltages. High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. Operation to 100% duty cycle minimizes dropout voltage (250mV at 500mA). The low-dropout linear regulators use an internal P-channel metal-oxide (PMOS) pass transistor to minimize supply current and deliver up to 160mA each of continuous current. The MAX1534 includes a power-OK (POK) signal that indicates all outputs are in regulation. The 4% accurate threshold of the SHDN input permits its use as a lowbattery detector. The MAX1534 is available in a small 16-pin thin QFN (4mm ✕ 4mm) package, occupying 33% less board space than discrete solutions. FEATURES
o One Switching and Two Linear Regulators o Switching Regulator +4.5V to +24V Input Voltage Range Over 95% Efficiency Up to 500mA Output Curren...
Maxim Integrated
