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LP3907

National Semiconductor
Part Number LP3907
Manufacturer National Semiconductor
Description Dual High-Current Step-Down DC/DC and Dual Linear Regulator
Published Jan 25, 2010
Detailed Description LP3907 Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface August 2007 LP3907 Du...
Datasheet PDF File LP3907 PDF File

LP3907
LP3907

Overview
LP3907 Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface August 2007 LP3907 Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface General Description The LP3907 is a multi-function, programmable Power Management Unit, optimized for low power FPGAs, microprocessors and DSPs.
This device integrates two highly efficient 1A/ 600mA step-down DC/DC converters with dynamic voltage management (DVM), two 300mA linear regulators and a 400kHz I2C compatible interface to allow a host controller access to the internal control registers of the LP3907.
The LP3907 additionally features programmable power-on sequencing and a tiny 4 x 4 x 0.
8mm 24–pin LLP pin package.
Features ■ Compatible with advanced applications processors and FPGAs ■ 2 LDOs for powering Internal processor functions and I/Os ■ High speed serial interface for independent control of device functions and settings Precision internal reference Thermal overload protection Current overload protection 24-lead 4 × 4 × 0.
8mm LLP package Software Programmable Regulators External Power-on-reset function for Buck1 and Buck2 (i.
e.
, Power Good with delay function) ■ Undervoltage lock out detector to monitor input supply voltage Key Specifications Step-Down DC/DC Converter (Buck) ■ 1A/600mA output current ■ Programmable VOUT from: — Buck1 : 0.
8V–2.
0V @ 1A — Buck2 : 1.
0V–3.
5V @ 600mA ■ Up to 96% efficiency ■ 2.
1MHz PWM switching frequency ■ PWM - PFM automatic mode change under low loads ■ ±3% output voltage accuracy ■ Automatic soft start Linear Regulators (LDO) ■ Programmable VOUT of 1.
0V–3.
5V ■ ±3% output voltage accuracy ■ 300mA output current www.
DataSheet4U.
com ■ 30mV (typ) dropout ■ ■ ■ ■ ■ ■ Applications ■ FPGA, DSP core power ■ Applications processors ■ Peripheral I/O power © 2007 National Semiconductor Corporation 300178 www.
national.
com LP3907 Typical Application Circuit 30017801 FIGURE 1.
Application Circuit www.
DataSheet4U.
com ...


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