AP3421B Datasheet PDF - BCD Semiconductor Dual 1.0A Synchronous Step-down Converters Specs

AP3421B - Dual 1.0A Synchronous Step-down Converters

This page provides the datasheet information for the AP3421B, a member of the AP3421 Dual 1.0A Synchronous Step-down Converters family.

Datasheet Summary

Description

The AP3421/A/B is a fully integrated dual output voltage regulator.

The two converters are current mode and internally compensated.

The converters include integrated control and synchronous rectifier switches.

Features

VO1=1.8 to 3.6V at 1A.
VO2=1.0 to 3.6V at 1A.
Switching Frequency: 1.3MHz.
180° Phase Shifted Switching.
No Rectifier Diode Required.
Optional External Clocking (2× Clock Required).
Light Load Pulse Skipping.
Enable/Sleep State.
Internal Soft-start.
Open-drain Power On Reset Monitors Input and.
Outputs.
Discharge-Before-Turn-On (For AP3421/A).
Pre-bias Function (For AP3421B).

Datasheet Details

Part number	AP3421B
Manufacturer	BCD Semiconductor
File Size	504.93 KB
Description	Dual 1.0A Synchronous Step-down Converters
Datasheet	AP3421B Datasheet
Additional preview pages of the AP3421B datasheet.

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Full PDF Text Transcription

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Preliminary Datasheet 1.3MHz, Dual 1.0A Synchronous Step-down Converters AP3421/A/B General Description The AP3421/A/B is a fully integrated dual output voltage regulator. The two converters are current mode and internally compensated. The converters include integrated control and synchronous rectifier switches. The outputs are both rated for up to 1A. Both outputs are adjustable using external resistors. The step-down converters operate at 1.3MHz fixed switching frequency under normal load and in a pulse skipping mode for light loads. The switching clock is shifted 180° for SW2. The E/S pin provides an enable function and allows the converter to be synchronized to an external clock. With E/S held low, the AP3421/A/B draws less than 10µA current.

Published: Aug 17, 2015 |