Description

The A6902D is a complete step down switching regulator with adjustable current limit. Based on a voltage mode structure it integrates an additional current error amplifier to implement both a constant voltage and constant current control.

The current limit programming is very simple and accurate (± 5) selecting the proper sensing resistor.

The DC-DC converter can be used either as a voltage source with adjustable current limit (set by using the external sense resistor) or as current source to charge NiMH / NiCd batteries or drive voltage load like LEDs.

The internal P-Channel DMOS transistor (typ. RDSON 250 mΩ) assures high efficiency and minimum dropout even at high output current level.

Features

• Qualified following the AEC-Q100 requirements

• Up to 1 A DC output current

• Operating input voltage from 8 V to 36 V

• Output voltage adjustable from 1.235 V to 35 V

• Precise 3.3 V (±2 ) reference voltage

• 250 kHz Internally fixed frequency

• Voltage feedforward

• Zero-load current operation

• Internal current limiting

• Protection against feedback disconnection

• Thermal shutdown

Applications

• Automotive applications

• Adjustable current generator

• Simple step-down converters with adjustable current limit