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

The XCL208 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 series uses synchronous rectification at an operating frequency of 3MHz. The XCL208 series has a fixed frequency, enabling the suppression of output ripple.

Soft start and on/off functions with CL discharge are provided, and the IC can be put in the standby state by inputting a Low level signal into the CE pin.

Feature

Input Voltage Range1.8V～6.0V(TypeF)
2.0V～6.0V(TypeA/B)
Output Voltage Range0.8V～4.0V(±2.0%)(Fixed)
High Efficiency90%(VIN=4.2V,VOUT=3.3V)
Output Current400mA
Oscillation Frequency3.0MHz(±15%)
CE FunctionActive High
Soft-start Circuit Built-in
CL High Speed Auto Discharge
Protection CircuitsCurrent Limiter Built-in(Constant Current & Latching)
Control MethodsPWM
Operating Ambient Temperature-40℃～+85℃
Environmentally FriendlyEU RoHS compliant, Pb free

Typical Application Circuit

Quality Reports

Technical Document

Packages

Package Number of Pins Pcs/Reel Package Size(mm)
USP-10B03 10 3,000 2.15 × 2.5 x 1.05

XCL208 Series Part Numbers

Part number Sample Type Output Voltage Oscillation Frequency Packages EDA Online Store
XCL208A103DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 1.0V 3.0MHz USP-10B03
XCL208A123DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 1.2V 3.0MHz USP-10B03
XCL208A153DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 1.5V 3.0MHz USP-10B03
XCL208A183DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 1.8V 3.0MHz USP-10B03
XCL208A253DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 2.5V 3.0MHz USP-10B03
XCL208A283DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 2.8V 3.0MHz USP-10B03
XCL208A2L3DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 2.85V 3.0MHz USP-10B03
XCL208A303DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 3.0V 3.0MHz USP-10B03
XCL208A333DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 3.3V 3.0MHz USP-10B03
XCL208B103DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 1.0V 3.0MHz USP-10B03
XCL208B123DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 1.2V 3.0MHz USP-10B03
XCL208B153DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 1.5V 3.0MHz USP-10B03
XCL208B183DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 1.8V 3.0MHz USP-10B03
XCL208B253DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 2.5V 3.0MHz USP-10B03
XCL208B283DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 2.8V 3.0MHz USP-10B03
XCL208B2L3DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 2.85V 3.0MHz USP-10B03
XCL208B303DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 3.0V 3.0MHz USP-10B03
XCL208B333DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 3.3V 3.0MHz USP-10B03
XCL208F083DR VIN≧2.0V, Output Voltage External Setting, CL auto discharge, High speed soft-start FB=0.8V 3.0MHz USP-10B03

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