XC9221 Torex Semiconductor, XC9221 Datasheet

XC9221

Manufacturer Part Number

XC9221

Description

16V Input Voltage, Step-Down DC/DC Controller ICs.

Manufacturer

Torex Semiconductor

Datasheet

1.XC9221.pdf (22 pages)

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Download datasheet (514Kb)

XC9220/XC9221

16V Input Voltage, Step-Down DC/DC Controller ICs.

C E

■GENERAL DESCRIPTION

The XC9220/XC9221 series is a group of multi-purpose step-down DC/DC controller ICs. The ICs enable a high efficiency,

stable power supply with an output current up to 3A to be configured using only a transistor, a coil, a diode, and two capacitors

connected externally. Low ESR capacitors such as a ceramic capacitor can be used as an output capacitor.

The XC9220/XC9221 series has a 0.9V (±1.5%) reference voltage, and using externally connected resistors, the output

voltage can be set freely. With an internal switching frequency of 300kHz and 500kHz 1.0MHz, small external components

can also be used. The XC9220 series is PWM control, and the XC9221 series is PWM/PFM mode, which automatically

switches from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of load conditions.

As for the soft-start time, the XC9220/XC9221A and C series is internally set to 4msec and the XC9220/XC9221B and D

series can be externally set-up. With the built-in U.V.L.O. (Under Voltage Lock Out) function, the internal P-channel driver

transistor is forced OFF when input voltage becomes 2.3V or lower.

■APPLICATIONS

●Set top boxes

●Digital TVs

●DVD/HDD recorders

●Portable information terminals

●Notebook computers

■TYPICAL APPLICATION CIRCUIT

* RSENSE : Tantalum and electrolytic capacitors can be used, in w hich case,

RSENSE becomes unnecessary.

SBD

MOSFET

Pch

( f or ceramic CL )

RS ENS E

FB1

FB2

Series

OUT

■TYPICAL PERFORMANCE

■FEATURES

Operating Voltage Range

Output Voltage Range

Output Voltage Externally Set : 0.9V (accuracy +1.5%)

Output Current

Oscillation Frequency

Control Methods

Soft-Start Function

Protection Circuits

Low ESR

Capacitor Compatible

Packages

CHARACTERISTICS

●Efficiency vs. Output Current

PchMOSFET: CPH3308 (SANYO), CDD=1.0μF (ceramic), RIN=10Ω

100

0.1

XC9221A095MR (VOUT=3.3V, FOSC=500kHz)

VIN=5.0V

Output Current　IOUT (mA)

CIN=47μF (OS-Con), CL=47μF (OS-Con),

VIN=12.0V

: 2.8V ~ 16.0V

: 1.2V or more

: Less than 3.0A

: 300kHz, 500kHz, and 1.0MHz

: PWM control (XC9220)

: 4ms, internally set

: Integral protection (1.0 ms)

: Ceramic capacitor

: SOT-25

(XC9220/XC9221 Aand B series)

PWM/PFM automatic switching

(XC9221)

(XC9220/XC9221A, 500kHz)

Externally set (XC9220/XC9221B)

USP-6C

Short-circuit protection

L=10μH (CDRH8D43, SUMIDA)

100

VIN=16.0V

1000

ETR0511_007

10000

1/22

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