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LP3927 Datasheet Cellular/pcs System Power Management

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LP3927 Cellular/PCS System Power Management IC August 2002 LP3927 Cellular/PCS System Power Management.

General Description

The LP3927 system power management IC is designed for cellular/PCS handsets as well as other portable systems that require intelligent power management.

Each device contains five low-dropout linear regulators (LDO’s), a reset timer, a power-up control logic, a general-purpose open drain output that can be used to light LEDs, and a CMOS rail-to-rail input/output operational amplifier.

Each linear regulator

Key Features

  • an extremely low dropout voltage of 100 mV (typ) at maximum output current. LDO1 and LDO2 are powered on and off by either the KYBD or the VEXT pin. LDO3, LDO4 and LDO5 each have its independent enable pin. LDO1 and LDO4 are rated at 150 mA each, LDO2 and LDO5 are rated at 200 mA each and LDO3 is rated at 100 mA. All LDO’s are optimized for low noise and high isolation. The open drain output current sink can be programmed up to 150 mA by using an external low cost resistor. A single supply, low.

More Datasheets from National Semiconductor (now Texas Instruments)

Part Number Description
LP3921 Battery Charger Management/Regulator
LP3923 Cellular Phone Power Management
LP3928 High Speed Bi-Directional Level Shifter and Ultra Low-Dropout CMOS Voltage Regulator
LP3929 High Speed Bi-Directional Level Shifter and Ultra Low-Dropout CMOS Voltage Regulator
LP3905 Power Management Unit For Low Power Handheld Applications
LP3906 Dual High Current Step Down DC/DC and Dual Linear Regulator
LP3907 Dual High-Current Step-Down DC/DC and Dual Linear Regulator
LP3910 Power Management
LP3913 Power Management
LP3917 CDMA Cellular Phone Power Management

LP3927 Distributor