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1.0A Inductor Built-in Step-Down “micro DC/DC” Converters

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GreenOperationCompatible

ETR28010-001

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GENERAL DESCRIPTION

The XCL219/XCL220 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 XCL219/XCL220 series uses synchronous

HiSAT-COT+PWM control (XCL219) or HiSAT-COT+automatic PWM/PFM switching control (XCL220) can be selected.

The series have a high speed soft-start as fast as 0.3ms 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,

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APPLICATIONS

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Note Book PC

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Tablet PC

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SSD(Solid State Drive)

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Mobile phone

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Digital still camera

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Portable game machine

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TYPICAL PERFORMANCE

CHARACTERISTICS

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TYPICAL APPLICATION CIRCUIT

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FEATURES

Input Voltage

: 2.5V～5.5V

Output Voltage

: 0.8V～3.6V(±2.0%)

Oscillation Frequency

: 3.0MHz

Output Current

: 1.0A

Efficiency

Control Methods

: HiSAT-COT

100% Duty Cycle

HiSAT-COT+PWM (XCL219)

HiSAT-COT+PWM/PFM (XCL220)

Circuit Protection

: Thermal Shut Down

Current Limit Circuit (Drop)

Short Circuit Protection (Latch)

Functions

: Soft-start Circuit Built-in

UVLO

Output Capacitor

: Low ESR Ceramic Capacitor

Operating Ambient Temperature : -40℃～+105℃

Package

: CL-2025-02

Environmental Friendly

: EU RoHS Compliant, Pb Free

1.0A

4.7μF

10μF

7

8

1

2

3

4

5

6

PGND

Lx

CE

AGND

0

20

40

60

80

100

0.1

1

10

100

1000

XCL219

XCL220