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

The 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 XCL209 series uses synchronous rectification at an operating frequency of 3MHz.

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.

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/PFM Auto
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

XCL209 Series Part Numbers

Part number Sample Type Output Voltage Oscillation Frequency Packages EDA Online Store
XCL209A103DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 1.0V 3.0MHz USP-10B03
XCL209A123DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 1.2V 3.0MHz USP-10B03
XCL209A153DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 1.5V 3.0MHz USP-10B03
XCL209A183DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 1.8V 3.0MHz USP-10B03
XCL209A253DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 2.5V 3.0MHz USP-10B03
XCL209A283DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 2.8V 3.0MHz USP-10B03
XCL209A2L3DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 2.85V 3.0MHz USP-10B03
XCL209A303DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 3.0V 3.0MHz USP-10B03
XCL209A333DR VIN≧2.0V, Fixed Output Voltage, No CL auto discharge, Standard soft-start 3.3V 3.0MHz USP-10B03
XCL209B103DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 1.0V 3.0MHz USP-10B03
XCL209B123DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 1.2V 3.0MHz USP-10B03
XCL209B153DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 1.5V 3.0MHz USP-10B03
XCL209B183DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 1.8V 3.0MHz USP-10B03
XCL209B253DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 2.5V 3.0MHz USP-10B03
XCL209B283DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 2.8V 3.0MHz USP-10B03
XCL209B2L3DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 2.85V 3.0MHz USP-10B03
XCL209B303DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 3.0V 3.0MHz USP-10B03
XCL209B333DR VIN≧2.0V, Fixed Output Voltage, CL auto discharge, High speed soft-start 3.3V 3.0MHz USP-10B03
XCL209F083DR 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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