LP3917RL-M NSC [National Semiconductor], LP3917RL-M Datasheet

LP3917RL-M

Manufacturer Part Number

LP3917RL-M

Description

CDMA Cellular Phone Power Management Unit

Manufacturer

NSC [National Semiconductor]

Datasheet

1.LP3917RL-M.pdf (6 pages)

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BOSTOCK HK LIMITED

Part Number:

LP3917RL-M(V05)

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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 inter-

face 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 suit-

ed for supplying voltage to RF section.

Two comparators can be used for detecting external acces-

sories like ear plug etc.

LP3917 can use interrupt for alerting BB processor of status

changes instead of using inefficient status polling.

Key Specifications

■

System Diagram

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

201762

Features

■

Applications

■

Please contact NSC Sales for a full datasheet for the device.

Two high efficiency Synchronous Magnetic Buck

Regulators, I

High efficiency PFM mode @ low I

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

CDMA Handsets

OUT

800 mA and 600 mA

20176201

OUT

December 2006

www.national.com

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LP3917RL-M Summary of contents

Page 1

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 ...

Page 2

Typical Application Diagram www.national.com 2 20176202 ...

Page 3

... TOP VIEW Package Part Number Marking LP3917RL-S 250 units tape and reel V01 LP3917RLX-S 1000 units tape and reel LP3917RL-M 250 units tape and reel V05 LP3917RLX-M 1000 units tape and reel LP3917RL-Q 250 units tape and reel V04 LP3917RLX-Q 1000 units tape and reel ...

Page 4

Physical Dimensions www.national.com 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 4 ...

Page 5

Notes 5 www.national.com ...

Page 6

THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE ...

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