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PWM Controlled Step-Up DC/DC Controllers

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GENERAL DESCRIPTION

The XC9101 series are step-up multiple current and voltage feedback DC/DC controller ICs.

Current sense, clock

frequencies and amp feedback gain can all be externally regulated.

A stable power supply is possible with output currents of up to 1.5A.

For output voltages outside this range, we recommend the FB version, which has a 0.9V internal reference voltage. Using this

version, the required output voltage can be set-up using 2 external resistors.

Switching frequencies can also be set-up externally within a range of 100 ~ 600kHz and therefore frequencies suited to your

particular application can be selected.

With the current sense function, peak currents (which flow through the driver transistor and the coil) can be controlled.

Soft-start time can be adjusted using external resistor and capacitor.

During shutdown (CE pin=L), consumption current can be reduced to as little as 0.5μA (TYP.) or less.

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APPLICATIONS

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Mobile, Cordless phones

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Palm top computers, PDAs

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Portable games

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Cameras, Digital cameras

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Note book PCs

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TYPICAL APPLICATION CIRCUIT

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FEATURES

Stable Operations via Current & Voltage

Multiple Feedback

Unlimited Options for Peripheral Selection

Current Protection Circuit

Ceramic Capacitor Compatible

Input Voltage Range

: 2.5V ~ 20V

Output Voltage Range : 2.5V ~ 16V

(Fixed Voltage Type)

: 30V + (Adjustable Type)

Oscillation Frequency Range

: 100kHz ~ 600kHz

Output Current

: Up to 1.5A

Package

: MSOP-8A, SOP-8

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TYPICAL PERFORMANCE

CHARACTERISTICS

ETR0403_003