400mA Synchronous Step-Down DC/DC Converters

The XC9245 series is a group of synchronous-rectification type step-down DC/DC converters with a built-in 0.65ΩP-ch MOS driver transistor and 0.45Ω N-ch MOS switching transistor, designed to allow the use of ceramic capacitors. Output current of 400mA (MAX.) to be configured using only a coil and capacitor connected externally.

The output voltage can be set from 0.8V to 4.0V in increments of 0.05V (±2.0%). With an internal switching frequency of 1.2MHz, small external components can be used. USPN-6 package is suitable for the application which requires low profile and small-footprint.

When stand-by mode, due to stop all operation, quiescent current is reduced to 1μA or less. The integrated CL discharge function which enables the electric charge at the output.

Capacitor CL to be discharged via the internal discharge switch located between the VOUT and VSS pins. The CL discharge function prevents malfunction on VOUT connecting application during stand-by mode.

The XC9245 series has a high speed soft-start as fast as 0.25ms in typical for quick turn-on. Current limiter circuit (Constant Current & Latching) is built-in for preventing from thermal destruction. With UVLO (Under Voltage Lock Out) function, the internal P channel driver transistor is forced OFF when input voltage becomes 2.25V or lower.

Feature

Driver Transistor0.65Ω P-ch Driver Transistor
0.45Ω N-ch Switching Transistor
Input Voltage Range2.3V～6.0V
Output Voltage Range0.8V～4.0V(0.05V increments)
High Efficiency90%(TYP.)
Output Current400mA
Oscillation Frequency1.2MHz(±15%)
Maximum Duty Cycle100%
FunctionsCurrent Limit(Constant Current & Latching),CL High Speed Auto Discharge,Soft-Start
CapacitorLow ESR Ceramic
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)
USPN-6 6 5,000 1.3 x 1.3 x 0.4

XC9245 Series Part Numbers

Part number Sample Type Output Voltage Oscillation Frequency Packages EDA Online Store
XC9245A08C7R-G With CL Discharge, UVLO, Thermal Shutdown 0.8V 1.2MHz USPN-6
XC9245A09C7R-G With CL Discharge, UVLO, Thermal Shutdown 0.9V 1.2MHz USPN-6
XC9245A0LC7R-G With CL Discharge, UVLO, Thermal Shutdown 0.85V 1.2MHz USPN-6
XC9245A0MC7R-G With CL Discharge, UVLO, Thermal Shutdown 0.95V 1.2MHz USPN-6
XC9245A10C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.0V 1.2MHz USPN-6
XC9245A11C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.1V 1.2MHz USPN-6
XC9245A12C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.2V 1.2MHz USPN-6
XC9245A13C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.3V 1.2MHz USPN-6
XC9245A14C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.4V 1.2MHz USPN-6
XC9245A15C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.5V 1.2MHz USPN-6
XC9245A16C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.6V 1.2MHz USPN-6
XC9245A17C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.7V 1.2MHz USPN-6
XC9245A18C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.8V 1.2MHz USPN-6
XC9245A19C7R-G With CL Discharge, UVLO, Thermal Shutdown 1.9V 1.2MHz USPN-6
XC9245A1AC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.05V 1.2MHz USPN-6
XC9245A1BC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.15V 1.2MHz USPN-6
XC9245A1CC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.25V 1.2MHz USPN-6
XC9245A1DC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.35V 1.2MHz USPN-6
XC9245A1EC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.45V 1.2MHz USPN-6
XC9245A1FC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.55V 1.2MHz USPN-6
XC9245A1HC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.65V 1.2MHz USPN-6
XC9245A1KC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.75V 1.2MHz USPN-6
XC9245A1LC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.85V 1.2MHz USPN-6
XC9245A1MC7R-G With CL Discharge, UVLO, Thermal Shutdown 1.95V 1.2MHz USPN-6
XC9245A20C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.0V 1.2MHz USPN-6
XC9245A21C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.1V 1.2MHz USPN-6
XC9245A22C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.2V 1.2MHz USPN-6
XC9245A23C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.3V 1.2MHz USPN-6
XC9245A24C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.4V 1.2MHz USPN-6
XC9245A25C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.5V 1.2MHz USPN-6
XC9245A26C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.6V 1.2MHz USPN-6
XC9245A27C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.7V 1.2MHz USPN-6
XC9245A28C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.8V 1.2MHz USPN-6
XC9245A29C7R-G With CL Discharge, UVLO, Thermal Shutdown 2.9V 1.2MHz USPN-6
XC9245A2AC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.05V 1.2MHz USPN-6
XC9245A2BC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.15V 1.2MHz USPN-6
XC9245A2CC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.25V 1.2MHz USPN-6
XC9245A2DC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.35V 1.2MHz USPN-6
XC9245A2EC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.45V 1.2MHz USPN-6
XC9245A2FC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.55V 1.2MHz USPN-6
XC9245A2HC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.65V 1.2MHz USPN-6
XC9245A2KC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.75V 1.2MHz USPN-6
XC9245A2LC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.85V 1.2MHz USPN-6
XC9245A2MC7R-G With CL Discharge, UVLO, Thermal Shutdown 2.95V 1.2MHz USPN-6
XC9245A30C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.0V 1.2MHz USPN-6
XC9245A31C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.1V 1.2MHz USPN-6
XC9245A32C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.2V 1.2MHz USPN-6
XC9245A33C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.3V 1.2MHz USPN-6
XC9245A34C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.4V 1.2MHz USPN-6
XC9245A35C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.5V 1.2MHz USPN-6
XC9245A36C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.6V 1.2MHz USPN-6
XC9245A37C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.7V 1.2MHz USPN-6
XC9245A38C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.8V 1.2MHz USPN-6
XC9245A39C7R-G With CL Discharge, UVLO, Thermal Shutdown 3.9V 1.2MHz USPN-6
XC9245A3AC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.05V 1.2MHz USPN-6
XC9245A3BC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.15V 1.2MHz USPN-6
XC9245A3CC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.25V 1.2MHz USPN-6
XC9245A3DC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.35V 1.2MHz USPN-6
XC9245A3EC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.45V 1.2MHz USPN-6
XC9245A3FC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.55V 1.2MHz USPN-6
XC9245A3HC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.65V 1.2MHz USPN-6
XC9245A3KC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.75V 1.2MHz USPN-6
XC9245A3LC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.85V 1.2MHz USPN-6
XC9245A3MC7R-G With CL Discharge, UVLO, Thermal Shutdown 3.95V 1.2MHz USPN-6
XC9245A40C7R-G With CL Discharge, UVLO, Thermal Shutdown 4.0V 1.2MHz USPN-6

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