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400mA Inductor Built-in Step-Down “micro DC/DC” Converters

■GENERAL DESCRIPTION

The XCL208/XCL209 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in

one tiny package (2.5mm×2.15mm, h=1.05mm). A stable power supply with an output current of 400mA is configured using only

two capacitors connected externally.

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 1.8V (2.0V) to 6.0V enables support for applications that require an alkaline battery (2-cell) or

AC adapter (5V) power supply. An internally fixed output voltage (0.8V to 4.0V) or an externally set output voltage can be selected.

The XCL208/XCL209 series uses synchronous rectification at an operating frequency of 3.0MHz. PWM control (XCL208) or

automatic PWM/PFM switching control (XCL209) can be selected. The XCL208 series has a fixed frequency, enabling the

suppression of output ripple. The XCL209 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.

signal into the CE pin.

■APPLICATIONS

●

Mobile phones, Smart phones

●

Bluetooth Headsets

●

Tablet PCs

●

PND

●

PC peripheral devices

●

DSC, Camcorders

■

FEATURES

Input Voltage

: 1.8V ~ 6.0V (Type F)

: 2.0V ~ 6.0V (Type A/B)

Fixed Output Voltage

: 0.8V ~ 4.0V (±2.0%)

High Efficiency

Output Current

: 400mA

Oscillation Frequency

: 3.0MHz (±15%)

CE Function

: Active High

Soft-start Circuit Built-in

Protection Circuits

: Current Limiter Built-in

(Constant Current & Latching)

Control Methods

: PWM (XCL208)

PWM/PFM (XCL209)

Operating Ambient Temperature : -40℃∼+85℃

Package

: USP-10B03

Environmentally Friendly

: EU RoHS Compliant, Pb Free

■

TYPICAL APPLICATION CIRCUIT

ETR28003-001a

■ TYPICAL PERFORMANCE

CHARACTERISTICS

●

Efficiency vs. Output Current

XCL208x333DR/XCL209x333D

☆GreenOperation Compatible

0

20

40

60

80

100

0.01

0.1

1

10

100

1000

V

XCL209(PWM/PFM)

XCL208(PWM)

5.0V

XCL208A / XCL208B / XCL209A / XCL209B Type

XCL208F / XCL209F Type