■ 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.

■ FEATURES

• Ultra Low Standby Current .................................................................. 10µA TYP. with only VR6 is enabled at no load

• High Accuracy Output Voltage and Detector Threshold ...................... ±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/°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

■ APPLICATIONS

Portable Phones such as GSM, PDC and CDMA as well as other analog phones.

Power supply for battery-powered appliances.