FAN5355UC03X

$0.43

Description：IC REG BUCK PROG 1A 12WLCSP
Series：-
Mfr：Fairchild Semiconductor
Package：Bulk

SKU:d41cbc0cfb0a Category: Voltage Regulators - DC DC Switching Regulators Brand: Fairchild Semiconductor

Consult the customer manager about the wholesale price.

consultation hotline：86-132-6715-2157

email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.

Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.

Product introduction

FAN5355UC03X is listed in the Voltage Regulators - DC DC Switching Regulators range at ChipApex. The manufacturer field lists Fairchild Semiconductor. Its product description is IC REG BUCK PROG 1A 12WLCSP. Review the specifications below when checking this part for your BOM.

Voltage Regulators - DC DC Switching Regulators specifications for FAN5355UC03X

Description：IC REG BUCK PROG 1A 12WLCSP
Series：-
Mfr：Fairchild Semiconductor
Package：Bulk
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Programmable
Number of Outputs：1
Voltage - Input (Min)：2.7V
Voltage - Input (Max)：5.5V
Voltage - Output (Min/Fixed)：0.75V
Voltage - Output (Max)：1.54V
Current - Output：1A
Frequency - Switching：3MHz
Synchronous Rectifier：Yes
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：12-UFBGA, WLCSP
Supplier Device Package：12-WLCSP (2.23x1.46)
Grade：-
Qualification：-

Voltage Regulators - DC DC Switching Regulators datasheet and documents for FAN5355UC03X

FAN5355UC03X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5355UC03X is a synchronous step-down DC-DC converter from the TinyBuck family, manufactured by Fairchild Semiconductor and later onsemi. It delivers up to 1 A output current with a fixed 3 MHz switching frequency. The device accepts an input voltage range of 2.7 V to 5.5 V and provides a digitally programmable output voltage between 0.75 V and 1.975 V via an I2C-compatible interface. It utilizes a 12-bump CSP package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

Supports high-frequency operation at 3 MHz for compact passive component sizing
Features smooth transition between PWM and PFM modes for light-load efficiency
Includes I2C-compatible digital interface for programmable output voltage control

Voltage Regulators - DC DC Switching Regulators Applications

Cell phones and smart phones
3G, WiFi, WiMAX, and WiBro data cards
Netbooks and ultra-mobile PCs
SmartReflex-compliant power supplies
Mobile graphic processors and memory modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify manufacturer status as Fairchild Semiconductor was acquired by onsemi. Confirm datasheet version matches the specific production lot requirements. Check for RoHS compliance documentation relevant to the manufacturing date code. Ensure the 12-bump CSP package dimensions align with the target PCB footprint design constraints.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring small inductor solutions due to the 3 MHz switching frequency. It is suitable for systems needing precise digital voltage adjustment via I2C. Consider the 1 A current limit when designing for peak load conditions. Evaluate the 2.7 V minimum input voltage against the system's battery discharge curve.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the FAN5355 series of digitally programmable regulators. It shares architectural similarities with other variants in the lineup but is distinguished by its specific 1 A current rating and 12-bump CSP packaging. The series targets portable electronics requiring efficient power management in minimal space.