XC9201_1 Datasheet, PDF (1/24 Pages) Torex Semiconductor – PWM Controlled Step-Down DC/DC Controllers

XC9201 Series
PWM Controlled Step-Down DC/DC Controllers
ETR0502_004
■GENERAL DESCRIPTION
The XC9201 series are step-down 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 3.0A. With output voltage fixed internally, output voltage is
selectable in 100mV increments (semi-custom) within a 1.2V ~ 16.0V range. (±2.5%).
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 100kHz~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 resistors and capacitors.
During shutdown (CE pin =L), consumption current can be reduced to as little as 0.5μA (TYP.) or less and with U.V.L.O.
(Under Voltage Lock Out) built-in, the external transistor will be automatically shut off below the regulated voltage.
■APPLICATIONS
●Mobile, Cordless phones
●Palm top computers, PDAs
●Portable games
●Cameras, Digital cameras
●Notebook computers
■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
: 1.2V ~ 16V
Oscillation Frequency Range : 100kHz ~ 600kHz
Output Current
: Up To 3.0A
Package
: MSOP-8A
■TYPICAL APPLICATION CIRCUIT
■TYPICAL PERFORMANCE
CHARACTERISTICS
VOUT:5.0V FOSC:330kHz
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