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17

FX5545G402

Vishay

Document Number: 10110

Revision 13-Mar-03

FEATURES

• Fully integrated DC/DC converter

• High efficiency over large load range

• 2MHz switching frequency

• 100% duty cycle

• Power density - more than 150W/inch

3

• 1uA shutdown current

• 2.5V to 6V input range (1Li+ and 3-cell NiCd or NiMH cells)

• 3.3V to 6V output voltage

• Programmable PWM/PSM controls

• Low output ripple

• BGA/LGA construction

• Temperature range: - 40

°C to + 85°C

• No external components needed

• Output power 5W.

• Maximum current 1000mA

• Low profile

The DC/DC converter provides fully integrated synchronous

boost converter solution for the latest one-cell lithium ion

cellular phones. Its input voltage is between 2.5V to 6V, capable

of delivering 1000mA of output current at 3.3V to 6V.

The DC/DC converter combines the 2MHz-switching

controller with fully integrated passive components needed

to deliver the smallest and most efficient converter available

today. The high switching frequency minimizes the output

capacitance with peak to peak output ripple as low as 20mV.

The DC/DC converter delivers efficiency up to 95%.

The programmable pulse-skipping mode (PSM) maintains

this high efficiency even during the standby and idle modes

to increase overall battery life and talktime. In order to extract

the last ounce of power from the battery, the DC/DC converter

is designed with 100% duty cycle control for this mode. This

function enables the DC/DC converter to operate like a

saturated linear regulator delivering the highest potential

FX

5545

G402

FUNCTION

SIZE

CIRCUIT IDENTIFIER

OUTPUT VOLTAGE-Example: 5.0V should be written as 5V0 as the V indicates the decimal point,

or ADJ for adjustable version - self selectable output voltage.

PACKAGING-B1 = 10pcs in bulk; B5 = 50pcs in bulk; T1 = 13” reel; T2 = 7” reel.

ORDERING INFORMATION

APPLICATION

• Cordless phones, PDAs and others

• Supply voltage source for low voltage chip sets

• Portable computers

• Battery back-up supplies

• Cameras

• Routers

• Fiber optics

• LANS

• Image processing

output voltage for longer talk time.

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.

Industry Smallest and Low Profile

5W 1A DC/DC Boost Converter

with High Output Density Power