General Description
The Channel 1 is a step-down DC/DC converter, and own the ability of driving a 3A load without additional transistor component. Due to reducing the number of external component, the board space can be saved easily. The external shutdown function can be controlled by logic level and then come into standby mode. The internal compensation makes feedback control have good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. If current limit function occurred and VFB is down to 0.5V below, the switching frequency will be reduced. The switching frequency of 150KHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed +4% tolerance on output voltage under specified input voltage and output load conditions, and +20% on the oscillator frequency.
The channel 2 is a 1A regulator with extremely low dropout voltage. This product is specifically designed to provide well regulated supply for applications requiring 2.8V or lower voltages from 3.3V power supplies where high efficiency of a switcher can be achieved without the cost and complexity associated with switching regulator.

Features
*Channel 1: simple switch
-Adjustable version output voltage range, 1.23V to 18V+4% & Fixed 3.3V version
-150KHz +20% fixed switching frequency
-Voltage mode non-synchronous PWM control
-ON/OFF shutdown control input
-Operating voltage can be up to 20V
-Output load current: 3A
-Low power standby mode
*Channel 2: ultra low drop regulator
-Adjustable output voltage
-0.6V Maximum Dropout voltage at 1.0A Load current
-Fast transient response
-Good noise rejection
*Channel 1 & Channel 2
-SOP-16L Pb-free package
-Built-in switching transistor on chip
-Thermal-shutdown and current-limit protection of each channel

Applications
*PC Motherboard
*LCD Monitor
*Graphic Card
*DVD-Video Player
*NIC/Switch
*Telecom Equipment
*ADSL Modem
*Printer and other Peripheral Equipment

AP1516-33S, AP1516-33SA

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