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R5310L001B Datasheet

  • R5310L001B

  • Multi LDOs for Cellular-phone

  • 34頁

  • RICOH

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鈥?9.5.20
Multi LDOs for Cellular-phone
R5310L series
s
OUTLINE
The R5310L Series are Multi LDO regulators for power management of cellular phones. All of regulators are low noise and
extremely low quiescent current by CMOS process. Each of these ICs consists of eight LDOs, voltage detectors, battery
monitor, three LED drivers, and a ringer driver. Each of them can be controlled by CPU via 3-wire serial interface. These ICs
make it possible to integrate almost power management and analog drivers in cellular-phone systems. The output voltage of
two regulators are externally programmable, and other regulators are able to set different output voltage independently by laser
trim as well as detector thresholds.
A tiny 32-pin LQFP, 0.5mm lead pitch, is available.



s
FEATURES
Ultra Low Standby Current .................................................................. 10碌A(chǔ) TYP. with only VR6 is enabled at no load
High Accuracy Output Voltage and Detector Threshold ...................... 鹵2.0% except programmable VRs.
Output Voltage and Detector Threshold ............................................... Stepwise setting with a step of 0.1V is possible
except programmable VRs.
Low Temperature-Drift-Coefficients of Output Voltage and
Detector Threshold ............................................................................... TYP. 100ppm/擄C
Low Dropout Voltage ........................................................................... 150mV at 120mA for VR1
150mV at 80mA for VR2
High Ripple Rejection .......................................................................... 65dB at 1kHz for VR1, VR2 and VR5
60dB at 1kHz for VR6 and VR7
3-wire serial interface ........................................................................... Shut-down for each of regulators, except VR6,
detectors and drivers.
Adjusting output voltage for VR3/4 by 8 bit.
Battery voltage monitor........................................................................ Analog output for monitoring battery voltage
Package................................................................................................. LQFP 32pin with 0.5mm lead pitch






s
APPLICATIONS
Portable Phones such as GSM, PDC and CDMA as well as other analog phones.
Power supply for battery-powered appliances.
Rev.1.10
-1-

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