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NPI Body

STMicroelectronics A6902D

Up to 1 A step down switching regulator with adjustable current limit for automotive applications

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

STSW-eDSim - fast and powerful electrical simulation software for SMPS and analog ICs

eDSim is a fast and powerful electrical simulation tool for SMPS and analog ICs, integrated in the eDesignSuite tool. It features enhanced accuracy and higher convergence speed for SMPS, enabling a simulation time 10-50x faster than the classical analog SPICE simulators.

The tool is a specific version of the SIMPLIS/SIMetrix simulation environment paired with ST model components, for a full electrical simulation with no limitation of nodes and circuit size.

Design your analog circuit using the eDesignSuite engine, display a preview of it in few seconds with full annotated schematic and BOM, and then run the electrical simulation through eDSim to get fast and accurate simulations and reliable design validation, thus reducing the effort and risks related to hardware prototyping.

With the eDSim tool you can also create your schematic from scratch using ST models or simulate your SMPS and analog ICs from a list of predefined ST application schematics - test benches, that you can partially modify according to your needs.

Software release 2024.12 is now available.