XCL222 Datasheet, PDF (1/20 Pages) Torex Semiconductor – 0.5A Inductor Built-in Step-Down “micro DC/DC” Converters

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
: 2.5V～5.5V
: 0.8V～3.6V(±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)
Functions
: 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 (V_OUT=1.8V)
CL
0.5A _10μF
7
1 Lx
V_IN ⁶
2 ^AGND PGND 5
3 V_OUT
CE 4
8
C_IN
4.7μF
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