LP3917RLX-N

LP3917 CDMA Cellular Phone Power Management Unit December 2006 LP3917 CDMA Cellular Phone Power Management Unit General Description LP3917 is a complete Power Management Unit designed for CDMA cellular phones. LP3917 PMU contains 9 low noise low dropout voltage regulators, 2 buck regulators, an USB Transceiver, two comparators and a high speed serial interface to program on/off conditions and output voltages of individual regulators, and to read status information of the PMU. Buck regulators have an automatic switch to PFM mode at low load conditions allowing very good efficiency also at low output currents. LDO regulators provide very low noise, 35 uV typ, ideally suited for supplying voltage to RF section. Two comparators can be used for detecting external accessories like ear plug etc. LP3917 can use interrupt for alerting BB processor of status changes instead of using inefficient status polling. Features ■ Two high efficiency Synchronous Magnetic Buck Regulators, IOUT 800 mA and 600 mA High efficiency PFM mode @ low IOUT Auto Mode PFM/PWM switch Low inductance 2.2 uH @ 2 MHz clock 9 Low Noise LDO's 3 x 300 mA 5 x 150 mA 1 x 80 mA SW controllable LDO outputs USB 2.0 compatible Transceiver (12 Mbps) Thermal Shutdown with Early Warning Alarm Very low Sleep mode current Battery Voltage Monitor output Interrupt Request for reducing SW polling Ultra small 3.5x3.5 mm Micro SMDxt 49 bump package ■ ■ Key Specifications ■ ■ ■ ■ ■ 3.0V to 5.5V Input Voltage Range 170 mV typ Dropout Voltage on LDO's @ 300 mA 2% (typ) Output Voltage accuracy on LDO's 35 µV noise on LDO's 800/600 mA Buck regulators with 3% (typ) Accuracy and up to 90% efficiency ■ ■ ■ ■ ■ ■ ■ Applications ■ CDMA Handsets Please contact NSC Sales for a full datasheet for the device. System Diagram 20176201 © 2006 National Semiconductor Corporation 201762 www.national.com LP3917 Typical Application Diagram 20176202 www.national.com 2 LP3917 Device Pin Diagram 20176203 TOP VIEW Package Marking Information 20176204 Ordering Information Startup Sequential Non-Sequential Sequential Sequential Non-Sequential Non-Sequential HF_PWR trigger Edge Edge Level Level Level Level LK Option No No No Yes No Yes Part Number LP3917RL-S LP3917RLX-S LP3917RL-M LP3917RLX-M LP3917RL-Q LP3917RLX-Q LP3917RL-QL LP3917RLX-QL LP3917RL-N LP3917RLX-N LP3917RL-NL LP3917RLX-NL Package Marking V01 V05 V04 V06 V03 V07 Supplied As 250 units tape and reel 1000 units tape and reel 250 units tape and reel 1000 units tape and reel 250 units tape and reel 1000 units tape and reel 250 units tape and reel 1000 units tape and reel 250 units tape and reel 1000 units tape and reel 250 units tape and reel 1000 units tape and reel RLA49 NSC Drawing 3 www.national.com LP3917 Physical Dimensions inches (millimeters) unless otherwise noted Micro SMDxt 49 Package NS Package Number MKT-RLA49AAA X1 = 3.465mm ± 0.030mm X2 = 3.465mm ± 0.030mm X3 = 0.650mm ± 0.075mm www.national.com 4 LP3917 Notes 5 www.national.com LP3917 CDMA Cellular Phone Power Management Unit Notes THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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