RT8540AGQW

Description：IC LED DRIVER RGLTR NO 4A 20WQFN
Series：-
Mfr：Richtek USA Inc.
Package：Bulk

SKU:746588fdc7c3 Category: LED Drivers IC Brand: Richtek USA Inc.

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Product introduction

Product Detailed Parameters

Description：IC LED DRIVER RGLTR NO 4A 20WQFN
Series：-
Mfr：Richtek USA Inc.
Package：Bulk
Type：DC DC Regulator
Topology：Step-Up (Boost)
Internal Switch(s)：Yes
Number of Outputs：1
Voltage - Supply (Min)：2.8V
Voltage - Supply (Max)：5.5V
Voltage - Output：3.83V ~ 5.45V
Current - Output / Channel：4A
Frequency：2MHz
Dimming：No
Applications：Camera Flash
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：20-WFQFN Exposed Pad
Supplier Device Package：20-WQFN (4x4)
Grade：-
Qualification：-

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RT8540AGQW

Overview

The RT8540AGQW is a DC-DC step-up regulator IC designed for camera flash applications. It operates with an input voltage range of 2.7V to 5.5V and provides a regulated output voltage between 3.83V and 5.45V. The device supports a maximum switch current of 4A and integrates a 2MHz switching frequency. It features no dimming capability and operates within a temperature range of -40°C to 85°C. The component is housed in a 20-WQFN (4x4) package.

Feature Summary

Integrated boost converter architecture optimized for high-current LED flash driving
Fixed internal switching frequency for simplified external component selection
Regulated output voltage control suitable for consistent flash intensity

Applications

Camera flash power supplies
Mobile device LED illumination systems
Compact electronic lighting modules

Procurement Notes

Verify the exact suffix 'GQW' against the manufacturer's official datasheet to confirm pinout and thermal pad configuration. Ensure the operating voltage requirements align with the specified 3.83V to 5.45V output range. Confirm package dimensions match the 20-WQFN (4x4) specification before integration into PCB layouts.

Selection Notes

Select this component when a compact, high-efficiency boost solution is required for single-cell battery-powered camera flashes. It is appropriate for designs needing a fixed 2MHz frequency to minimize inductor size. Consider the 4A current limit when sizing external components for peak flash loads.

Part Context

This part belongs to Richtek's line of LED driver integrated circuits. It is distinct from other models like the RT8561AGQW, which offers multi-channel capabilities. The RT8540AGQW focuses on single-output high-current regulation for specific flash applications rather than general backlighting or multi-zone lighting.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify compatibility with existing board layouts if considering alternative manufacturers.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

Mode of Transportation

We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.

Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.