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XC9509

Torex Semiconductor
Part Number XC9509
Manufacturer Torex Semiconductor
Description Synchronous Step-Down DC/DC Converter
Published May 30, 2007
Detailed Description XC9509 Series Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector ETR10...
Datasheet PDF File XC9509 PDF File

XC9509
XC9509

Overview
XC9509 Series Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector ETR1006_001 GENERAL DESCRIPTION The XC9509 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in parallel with the DC/DC converter's output.
A voltage detector is also built-in.
Since the input for the LDO voltage regulator block comes from the input power supply, it is suited for use with various applications.
The DC/DC converter block incorporates a P-channel driver transistor and a synchronous N-channel switching transistor.
With an external coil, diode and two capacitors, the XC9509 can deliver output currents up to 600mA at efficiencies over 90%.
The XC9509 is designed for use with small ceramic capacitors.
A choice of three switching frequencies are available, 300kHz, 600kHz, and 1.
2MHz.
Output voltage settings for the DC/DC and VR are set-up internally in 100mV steps within the range of 0.
9V to 4.
0V (± 2.
0%).
For the VD, the ra...


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