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Fairchild Semiconductor FAN5403UCX

IC BATT CHG LI-ION 1CELL 20WLCSP

Answer first: this page is a purchasing reference for the exact part number FAN5403UCX from Fairchild Semiconductor. Use it to start datasheet, package, manufacturer and RFQ verification; do not treat page text as a live stock, price or lead-time promise.

Manufacturer: Fairchild Semiconductor Part number: FAN5403UCX Package: 20-UFBGA, WLCSP RFQ verification required

Key Parameters

Part NumberFAN5403UCX
ManufacturerFairchild Semiconductor
CategoryBattery Chargers
package20-UFBGA, WLCSP
series-
packagingBulk
product statusActive
param 1Lithium Ion
param 21
param 3Constant - Programmable
param 4Current, Timer, Voltage
param 5Over Temperature, Over Voltage, Short Circuit
param 61.25A
param 74.5V (Max)
param 86V
param 9I2C, USB
param 10-30°C ~ 85°C (TA)
param 11-
param 12-
param 13Surface Mount
param 1420-WLCSP (1.96x1.56)

Parameters are provided for purchasing review. Confirm package, suffix, lifecycle status, datasheet revision and approved substitutes before ordering.

How to Verify FAN5403UCX Before Ordering

Datasheet and parameter checks

  • Confirm the full manufacturer part number, not only a shortened search keyword.
  • Compare package, pinout, dimensions, voltage or rating fields, temperature range and compliance wording against the released BOM.
  • Use the manufacturer datasheet or drawing for electrical and mechanical limits before approving a substitute.

RFQ fields SENICO needs

  • Send exact part number, manufacturer, quantity, target delivery date, destination and required packaging.
  • State whether alternates are allowed, and list any date-code, certificate, traceability or customer AVL requirement.
  • Keep exact stock, factory lead time and proposed alternatives in separate quote lanes.

For FAN5403UCX, SENICO recommends checking manufacturer marking, package, date code, requested quantity, approved vendor requirements and replacement risk before issuing a purchase order. If a supplier suggests an equivalent, record the changed fields and approval owner before comparing price.

We do not treat displayed data as a real-time stock or price commitment. The RFQ reply is the verified commercial reference.

Related buying guides: stock and lead-time verification, equivalent IC comparison, and BOM RFQ preparation.