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XC9510

Torex Semiconductor
Part Number XC9510
Manufacturer Torex Semiconductor
Description Synchronous Step-Down DC/DC Converter
Published Apr 16, 2005
Detailed Description XC9510 Series Preliminary ! Input Voltage Range ! Output Voltage Range 2.4V ~ 6.0V DC/DC VR VD 0.9 ~ 4.0V ( ±2%) 0.9 ~ 4...
Datasheet PDF File XC9510 PDF File

XC9510
XC9510

Overview
XC9510 Series Preliminary ! Input Voltage Range ! Output Voltage Range 2.
4V ~ 6.
0V DC/DC VR VD 0.
9 ~ 4.
0V ( ±2%) 0.
9 ~ 4.
0V (±2%) 0.
9 ~ 5.
0V (±2%) 800mA 600mA October 28, 2003 Ver.
4 Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator In Series plus Voltage Detector ! Switching Frequency ! Output Current ! Ultra Small Packages ! Ceramic Capacitor Compatible 300kHz, 600kHz, 1.
2MHz DC/DC VR SOP-8 ! APPLICATIONS " CD-R / RW, DVD " HDD " PDAs, portable communication modem " Cellular phones " Palmtop computers " Cameras, video recorders ! GENERAL DESCRIPTION The XC9510 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in series with the DC/DC converter's output.
A voltage detector is also built-in.
A highly efficient, low noise output is possible since the regulator is steppeddown further from the DC/DC output.
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 XC9510 can deliver output currents up to 800mA at efficiencies over 90%.
The XC9510 is designed for use with small ceramic capacitors.
A choice of three switching frequencies are available, 300 kHz, 600 kHz, and 1.
2 MHz.
Output voltage settings for the DC/DC and VR are set-up internally in 0.
1V steps within the range of 0.
9V to 4.
0V ( ± 2.
0%).
For the VD, the range is of 0.
9V to 5.
0V (± 2.
0%).
The soft start time of the series is internally set to 5ms.
With the builtin U.
V.
L.
O.
(Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 1.
4 V or lower.
The operational states of the DC/DC and the regulator blocks can be changed by inputting three kinds of voltage level via the CE/MODE pin.
The functions of the MODE pin can be selected via the external control pin to switch the DC/DC control mode and the disable pin to shut down the regulator block.
! FEATURES Input Voltage Range : L...


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