FX5545G008
Vishay
Low Profile 3mm DC/DC Buck Converter
0.8V to 4.5V*, 3A with 380W/in
3
Power Density
Efficiency up to 95%
www.vishay.com For technical questions, contact Function
PA K @vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
Document Number: 10126
22 Revision: 01-Mar-05
FEATURES
• Fully integrated DC/DC converter
• Advanced development of FX5545G305
• High efficiency over large load range
• 100% duty cycle
• Power density - more than 380W/inch
3
• 1µA shutdown current
• 2.5V to 6V input range (1Li+ and 3-cell NiCd or NiMH 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
FunctionPAK@Vishay.com
The DC/DC converter is a programmable topology
synchronized Buck converter for today’s continuous
changing portable electronic market. The DC/DC converter
provides flexibility of utilizing various battery configurations
and chemistries such as NiCd, NiMH, or Li+ with an input
voltage range of 2.5V to 6V. An additional flexibility is
provided with topology programmability to power multiple
loads such as power amplifiers, microcontrollers, or
baseband logic IC’s. For ultra-high efficiency, converters are
designed to operate in synchronous rectified PWM mode
under full load while transforming into externally controlled
pulse-skipping mode (PSM
) under light load.
The DC/DC converter is available in 20-ports BGA package.
In order to satisfy the stringent ambient temperature
requirements, the DC/DC converter is designed to handle
the industrial temperature range of - 40°C to + 85°C.
APPLICATION
• Cordless phones, PDAs and others
• Supply voltage source for low-voltage chip sets
• Point of Load (POL) applications such as drivers for
FPGA’s, microprocessors, DSP’s amplifiers, etc.
• Portable computers
• Battery back-up supplies
• Cameras
ORDERING INFORMATION
FX 5545 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.
