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Torex Semiconductor

XCL221 Datasheet Preview

XCL221 Datasheet

0.5A Inductor Built-in Step-Down Converters

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XCL221/XCL222 Series
ETR28008-001
0.5A Inductor Built-in Step-Down “micro DC/DC” Converters
GENERAL DESCRIPTION
GreenOperationCompatible
The XCL221/XCL222 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a
control IC in one tiny package (2.0mm×2.5mm, h=1.0mm). An internal coil simplifies the circuit and enables minimization of
noise and other operational trouble due to the circuit wiring. A wide operating voltage range of 2.5V to 5.5V enables support
for applications that require an internally fixed output voltage (0.8V to 3.6V). The XCL221/XCL222 series uses synchronous
rectification at an operating frequency of 1.2MHz. The XCL221/XCL222 series uses HiSAT-COT (*) synchronous rectification.
HiSAT-COT+PWM control (XCL221) or HiSAT-COT+automatic PWM/PFM switching control (XCL222) can be selected.
The series have a high speed soft-start as fast as 0.25ms (TYP.) in typical for quick turn-on. With the built-in UVLO (Under
Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower.
When CE=Low, the integrated CL discharge function which enables the electric charge at the output capacitor CL to be
discharged via the internal discharge switch located between the LX and PGND pins. The power consumption will be less than
1.0μA.
(*) HiSAT-COT is an original Torex term for High Speed Transient Response.
APPLICATIONS
Wearable Device
Bluetooth Module
SSD(Solid State Drive)
Mobile phone
Digital still camera
Portable game devices
FEATURES
Input Voltage
Output Voltage
Oscillation Frequency
Output Current
Efficiency
Control Methods
Circuit Protection
Functions
: 2.5V5.5V
: 0.8V3.6V(±2.0%)
: 1.2MHz
: 500mA
: 93% (VIN=5.0V, VOUT=3.3V/200mA)
: HiSAT-COT
100% Duty Cycle
PWM (XCL221)
PWM/PFM (XCL222)
: Thermal Shut Down
Current Limit Circuit (Drop)
Short Circuit Protection (Latch)
: Soft-start Circuit Built-in
UVLO
CL Discharge
Output Capacitor
: Low ESR Ceramic Capacitor
Operating Ambient Temperature : -40+105
Package
: CL-2025-02
Environmental Friendly : EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE
CHARACTERISTICS
XCL222B181ER-G (VOUT=1.8V)
0.5A
CL
10μF
7
1 Lx
VIN 6
2 AGND PGND 5
3 VOUT
8
CE 4
CIN
4.7μF
1/20




Torex Semiconductor

XCL221 Datasheet Preview

XCL221 Datasheet

0.5A Inductor Built-in Step-Down Converters

No Preview Available !

XCL221/XCL222 Series
BLOCK DIAGRAM
L2
Inductor
VOUT
AGND
CE
R1 CFB
Phase
Compensation
Short
Protection
R2
Error
Amp.
Comparator
Vref with
Soft Start
S
Q
R
High Side
Current Limit
Logic
Synch
Buffer
Drive
CE Control Logic,
UVLO
Thermal Shutdown
Minimum
On Time
Generator
VIN
VOUT
PWM/PFM
Selector
L1
VIN
Lx
PGND
* The XCL221 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.
The XCL222 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM automatic
switching” internally.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
PRODUCT CLASSIFICATION
Ordering Information
XCL221①②③④⑤⑥-
XCL222①②③④⑤⑥-
DESIGNATOR
PWM
PWM/PFM Automatic switching control
ITEM
SYMBOL
DESCRIPTION
Type
B Refer to Selection Guide
②③
Output Voltage
0836
Output Voltage options
e.g.)1.2V =1, =2
1.25V =1, =C
0.05V Increments:
0.05=A,0.15=B,0.25=C,0.35=D,0.45=E,0.55=F,0.65=H,
0.75=K,0.85=L,0.95=M
Oscillation Frequency
1 1.2MHz
⑤⑥-(*1)
Package (Order Unit)
ER-G CL-2025-02 (3,000pcs/Reel)
(*1) The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
Selection Guide
TYPE
OUTPUT
VOLTAGE
B Fixed
CL AUTO-
DISCHARGE
Yes
LATCH or
SHORT
PROTECTION
Yes
UVLO
Yes
CHIP
ENABLE
Yes
CURRENT
LIMIT
Yes
SOFT-
START
Fixed
THERMAL
SHUTDOWN
Yes
2/20


Part Number XCL221
Description 0.5A Inductor Built-in Step-Down Converters
Maker Torex Semiconductor
Total Page 20 Pages
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