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2.0A Inductor Built-in Step-Down “micro DC/DC” Converters

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GreenOperation

Compatible

ETR28006-001

XCL211B082DR /XCL212B082DR

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TYPICAL PERFORMANCE

CHARACTERISTICS

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TYPICAL APPLICATION CIRCUIT

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GENERAL DESCRIPTION

The XCL211/XCL212series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in

one tiny package (3.1mm×4.7mm, h=1.3mm).

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 2.7V to 6.0V enables support for applications that require an externally set output voltage can

be selected. The XCL211/XCL212 series uses synchronous rectification at an operating frequency of 2.4MHz. PWM control

(XCL211) or automatic PWM/PFM switching control (XCL212) can be selected. The XCL211 series has a fixed frequency,

enabling the suppression of output ripple. The XCL212 series achieves high efficiency while holding down output ripple across the

full range of loads, from light to heavy, enabling the extension of battery operation time.

The series have a high speed soft-start as fast as 1ms 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 2.4V or lower. It’s suitable for

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FEATURES

Package Size

: 3.1mm×4.7mm, h=1.3mm

Input Voltage

: 2.7V～6.0V

Output Voltage

High Efficiency

Output Current

: 2.0A

Oscillation Frequency : 2.4MHz (±15%)

Maximum Duty Cycle

: 100%

Control Methods

: PWM (XCL211)

PWM/PFM (XCL212)

Functions

: Current Limit Circuit (automatic return)

Soft-Start Circuit Built-In

Output Capacitor

: Low ESR Ceramic Capacitor

Operating Ambient Temperature : -40℃～+85℃

Package

: USP-11B01

Environmental Friendly : EU RoHS Compliant, Pb Free

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APPLICATIONS

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Note PCs

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Printers

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Tablet PCs

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PND(Portable Navigation Device)

 

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XCL211

XCL212