ONSEMI FAN5903UCX

Manufacturer No:

FAN5903UCX

Manufacturer:

ONSEMI

Package:

9-UFBGA, WLCSP

Description:

Buck Converter with Bypass Mode for 3G/3.5G and 4G PAs

Quantity:

Delivery:

Payment:

In Stock :Available

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FAN5903UCX information

ONSEMI FAN5903UCX technical specifications, attributes, parameters and parts with similar specifications to ONSEMI FAN5903UCX.

Type
Parameter

Container Qty.
3000

Topology
Step-Down

Control Mode
Voltage Mode

fSW Typ (kHz)
3000 to 6000

Container Type
REEL

MSL Temp (°C)
260

VO Typ (V)
Adjustable

VCC Max (V)
5.5

IO Typ (A)
1

Efficiency (%)
96

Package Type
WLCSP-9

MSL Type
1

VCC Min (V)
2.7

Download datasheets and manufacturer documentation for ONSEMI FAN5903UCX.

Datasheet:

2c6409b610266f0c8166ee9f0399d05b.pdf

FAN5903 is a high-efficiency, low-noise, synchronous, step-down, DC-DC converter designed for powering 3G/3.5G/4G RF Power Amplifiers (PAs) in handsets and other mobile applications.The output voltage may be dynamically varied from 0.40 V to 3.50 V, proportional to an analog input VCON, ranging from 0.16 V to 1.40 V provided by an external DAC. This allows the PA to be supplied with the voltage that enables maximum power-added efficiency.An integrated bypass FET automatically switches on when battery voltage drops close to the desired output voltage (VOUT=VBAT-200 mV). The DC-DC switches back to Synchronous Mode when the voltage dropout exceeds 375 mV. The integrated bypass FET is also enabled when VCON is nominally greater than to 1.5V.The FAN5903 offers fast transition times, enabling changes to the output voltage in less than 10µs for power transitions. Moreover, a Current-Mode control loop with fast transient response ensures excellent line and load regulation.Light-load efficiency is optimized by operating in PFM Mode for load currents typically less than 100mA.The switching frequency may be set to 3 MHz or 6 MHz, enabling further optimization of system performance. The FAN5903 typically uses a single, small-form-factor inductor of 540nH. Efficiency may be further optimized using a 1.0 µH inductor when running at 3 MHz.When output regulation is not required, the FAN5903 may be placed in Sleep Mode by setting VCON nominally to 50 mV. This ensures a very low IQ (< 70 µA) while enabling a fast return to output regulation. The FAN5903 enables significant current reduction and increased talk time and is available in a 1.34 mm x 1.29 mm, 9-bump, 0.40 mm-pitch, WLCSP package.

Application

Feature

2.7 V to 5.5 V Input Voltage Range
V_OUT Range from 0.4 V to 3.5 V (or V_IN)
Small Form Factor Inductor
2012 540 nH for Minimal PCB Area
2520 1.0 µH for Higher Efficiency
Bypass Dropout at 500 mA, 60 mV Typical
100% Duty Cycle for Low Dropout Operation
Input Under-Voltage Lockout / Thermal Shutdown
1.34 mm x 1.29 mm, 9-Bump, 0.4 mm-Pitch WLCSP
3 MHz / 6 MHz Selectable Switching Frequency to Facilitate System Optimization
High-Efficiency PFM Operation at Low Power
Sleep Mode for Very Low IQ Operation
Up to 96% Efficient Synchronous Operation at High-Power Conditions
10 µs Output Voltage Step Response for Early Power Loop Settling

User Guide

PURCHASE

Please verify all part numbers, quantities, and packaging preferences before placing your order. If substitutions are acceptable, please indicate this clearly. For time-sensitive projects, confirm estimated delivery dates and stock availability in advance. Once submitted, changes or cancellations may not be possible, especially for items marked as non-cancellable/non-returnable (NCNR). For international shipments, please ensure all import documentation is complete and accurate to avoid delays.

MEANS OF PAYMENT

For your convenience, we accept multiple payment methods in USD, including PayPal, Credit Card, and Wire Transfer. Net terms may be available for qualified customers upon approval.

RFQ (REQUEST FOR QUOTATIONS)

Please ensure the part numbers and quantities are accurate and complete when submitting your RFQ.
Provide target prices and acceptable alternatives, if any, to speed up the quotation process.

IMPORTANT NOTICE

Quotations are subject to stock availability and may vary with market conditions. Prices and lead times are not guaranteed until a purchase order is confirmed. Ensure your contact details are correct to avoid delays in response.

Step1：Prepare product

Step2：Desiccant Protection

Step3：Vacuum Packaging

Step4：Individual Package

Step5：Anti-collision Filling

Step6：Packaging Box

SHIPPING COST

1. Shipping starts at $40, but some countries will exceed $40. For example (South Africa, Brazil, India, Pakistan, Israel, etc.).
2. Some specific products need to reach the minimum order quantity.
3. It may cost additional remote fees for delivery if you are in a remote area.

SHIPPING METHOD

Currently, our products are shipped through DHL, FedEx, SF, and UPS.

DELIVERY TIME

1. Once the goods are shipped, estimated delivery time depends on the shipping methods you chose: FedEx International, 5-7 business days.
2. For in-stock parts, orders normally could be shipped out within 1-2days.