RT9503AGQW

Description：IC BATT CHG LI-ION 1CELL 16WQFN
Series：-
Mfr：Richtek USA Inc.
Package：Tape & Reel (TR)

SKU:a60270647d41 Category: Battery Chargers Brand: Richtek USA Inc.

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Product introduction

Product Detailed Parameters

Description：IC BATT CHG LI-ION 1CELL 16WQFN
Series：-
Mfr：Richtek USA Inc.
Package：Tape & Reel (TR)
Battery Chemistry：Lithium Ion
Voltage - Supply (Max)：12V
Operating Temperature：-20°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：16-WFQFN Exposed Pad
Supplier Device Package：16-WQFN (3x3)
Number of Cells：1
Current - Charging：Constant - Programmable
Programmable Features：Timer
Fault Protection：Over Voltage
Charge Current - Max：1A
Battery Pack Voltage：4.2V
Interface：USB
Grade：-
Qualification：-

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RT9503AGQW

Overview

The RT9503AGQW is a fully integrated linear single-cell Li-Ion battery charger manufactured by Richtek USA Inc. It supports AC adapter and USB port inputs, automatically detecting the power source. The device features a control algorithm with preconditioning and fast charge modes, terminating when current drops below a preset threshold. USB input current is selectable at 100mA or 500mA, while AC adapter current is programmable up to 1A via an external resistor. It includes internal thermal feedback for ambient temperature regulation. Maximum ratings are 18V for AC adapter and 7V for USB input. The component operates within a temperature range of -20°C to 85°C and utilizes a 16-pin WQFN EP package.

Feature Summary

Fully integrated linear architecture for single-cell Li-Ion batteries
Automatic detection and selection between AC adapter and USB power sources
Internal thermal feedback circuitry for temperature regulation
Programmable charge current via external resistor

Applications

Portable electronic devices requiring single-cell Li-Ion charging
USB-powered consumer electronics
AC adapter powered handheld gadgets

Procurement Notes

Verify the specific suffix AGQW against the manufacturer's official datasheet to confirm pinout and package dimensions. Ensure compatibility with the target PCB footprint, specifically the 16-pin WQFN EP configuration. Confirm RoHS compliance status if required by regional regulations. Cross-reference the part number with the latest Richtek documentation to avoid obsolete variants.

Selection Notes

Select this component for applications requiring a low-cost, linear charging solution for single-cell Li-Ion batteries. It is suitable where automatic source detection between USB and AC adapters is necessary. Consider the thermal performance and maximum input voltage ratings relative to the system design. Verify that the programmable current range meets the battery specifications.

Part Context

The RT9503A series belongs to Richtek's portfolio of battery management ICs designed for portable electronics. This specific model focuses on linear charging technology, offering integration benefits over discrete solutions. It is distinct from switching chargers in the same family, which may offer higher efficiency but different complexity.