Vishay FX5545G008 Data Handbook
Summary
This advanced DC/DC Buck Converter is a high-efficiency, programmable topology component designed for portable and industrial electronics power solutions. Featuring a low profile design, it handles up to 3A output with fine voltage control from 0.8V to 4.5V across a wide input range (2.5V to 6V). The manual provides comprehensive technical specifications, detailing operation in various modes—including high-efficiency PSM and PWM—for applications like cameras, microprocessors, cordless phones, and specialized battery backup supplies operating under extreme temperatures (-40°C to +85°C).
Page 1 Text Content
FX5545G008 Vishay
Low Profile 3mm DC/DC Buck Converter 0.8V to 4.5V*, 3A with 380W/in3 Power Density
Efficiency up to 95%
FEATURES Fully integrated DC/DC converter Advanced development of FX5545G305 High efficiency over large load range 100% duty cycle Power density - more than 380W/inch3 1µA shutdown current 2.5V to 6V input range (1Li+ and 3-cell Ni Cd or Ni MH cells) 0.8V to 4.5V* output voltage Programmable PWM/PSM controls Low output ripple BGA construction Temperature range: - 40°C to + 85°C No external components required Output power 10W Maximum current 3A Low profile *Note: For higher putput voltage please consult factory at Function [email protected]
The DC/DC converter is a programmable topology The DC/DC converter is available in 20-ports BGA package. synchronized Buck converter for today’s continuous In order to satisfy the stringent ambient temperature changing portable electronic market. The DC/DC converter requirements, the DC/DC converter is designed to handle provides flexibility of utilizing various battery configurations the industrial temperature range of - 40°C to + 85°C.
and chemistries such as Ni Cd, Ni MH, or Li+ with an input
APPLICATION
voltage range of 2.5V to 6V. An additional flexibility is
Cordless phones, PDAs and others
provided with topology programmability to power multiple
loads such as power amplifiers, microcontrollers, or Supply voltage source for low-voltage chip sets
baseband logic IC’s. For ultra-high efficiency, converters are Point of Load (POL) applications such as drivers for
designed to operate in synchronous rectified PWM mode FPGA’s, microprocessors, DSP’s amplifiers, etc.
under full load while transforming into externally controlled Portable computers pulse-skipping mode (PSM) under light load.
Battery back-up supplies Cameras
ORDERING INFORMATION
FX G008
FUNCTION
SIZE CIRCUIT IDENTIFIER - G008 or G018
OUTPUT VOLTAGE - Example: 1.2V should be written as 1V2 as the V indicates the decimal point or ADJ for adjustable version - self selectable output voltage. G018ADJ is only available in the adjustable version for Vout = 0.9V - 1.3V. For design considerations please see ANF110 PACKAGING - B1 = 10pcs in bulk; B5 = 50pcs in bulk; T1 = 13” reel; T2 = 7” reel.
For lead (Pb)-free solder please add E2 suffix.
www.vishay.com For technical questions, contact Function [email protected] Document Number: 10126
For marketing questions, contact Function [email protected] Revision: 01-Mar-05
Page Summary Contents For Vishay FX5545G008 Data Handbook
Manual Details
| Brand | Vishay |
|---|---|
| Pages | 6 |
| File Size | 667.65 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What is the operating temperature range of this converter?
The operation temperature range is -40°C to +85°C.
Is external circuitry required for basic use?
No, the device features no external components are required.
How does efficiency perform at different load levels?
It operates in PSM mode under light load and synchronous rectified PWM mode (POL) under full load for ultra-high efficiency.
What is the input voltage tolerance to handle various batteries?
The device handles an input voltage of 2.5V to 6V, supporting Li+, NiCd, or NiMH cells.