XC95103SL

Features:

Input Voltage Range     : 2.4V ~ 6.0V
Load Capacitors            : Ceramic Capacitors Compatible
VD Function                   : Detects output voltage from the VDOUT pin
                                       while sensing either VDD, DCOUT,
                                       or VROUT internally.
                                       Nch Open Drain Output
<DC/DC Converter>
Output Voltage Range   : 0.9 ~ 4.0V (Accuracy ±2%)
Output Current              : 800mA
Controls                         : PWM Control
                                       PWM, PWM / PFM Automatic
                                       Switching External
Oscillation Frequency     : 300kHz, 600kHz, 1.2MHz
<Regulator>
Output Voltage Range   : 0.9 ~ 4.0V (Accuracy ±2%)
Current Limit 600mA
Dropout Voltage            : 240mV @ IOUT=300mA (VOUT=2.8V)
High Ripple Rejection     60dB @1kHz (VOUT=2.8V)


Application

·CD-R / RW, DVD
·HDD
·PDAs, portable communication modem
·Cellular phones
·Palmtop computers
·Cameras, video recorders


Pinout




Specifications

PARAMETER	SYMBOL	RATINGS	UNITS
VDD Pin Voltage	AVDD	- 0.3 ~6.5	V
DCOUT Pin Voltage	DCOUT	- 0.3 ~VDD + 0.3	V
VROUT Pin Voltage	ROUT	- 0.3 ~VDD + 0.3	V
VDOUT Pin Voltage	VDOUT	- 0.3 ~VDD + 0.3	V
LX Pin Voltage	LX	- 0.3 ~ VDD + 0.3	V
CE/MODE Pin Voltage	CE/MODE	- 0.3 ~ VDD + 0.3	V
Continuous Power Dissipation (*1)SOP-8	Pd	650	mW
Operating Temperature Range	Topr	- 40 ~ + 85
Storage Temperature Range	Tstg	- 55 ~+ 125

Description

The XC9510 series XC95103SL 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 XC95103SL 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 XC95103SL 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.