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LP3907 Datasheet(PDF) 1 Page - Texas Instruments |
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LP3907 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 57 page  LP3907 www.ti.com SNVS511N – JUNE 2007 – REVISED AUGUST 2011 Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C-Compatible Interface Check for Samples: LP3907 1 FEATURES and Buck2 (i.e., Power Good with delay function) 2 • Compatible with advanced applications • Undervoltage lock out detector to monitor processors and FPGAs input supply voltage • 2 LDOs for powering Internal processor • LP3907Q is an Automotive Grade product that functions and I/Os is AECQ-100 Grade 1 qualified • High-speed serial interface for independent control of device functions and settings APPLICATIONS • Precision internal reference • FPGA, DSP core power • Thermal overload protection • Applications processors • Current overload protection • Peripheral I/O power • 24-lead 4 × 4 × 0.8mm LLP or 25-bump 2.5 x 2.5mm micro SMD package • Software Programmable Regulators • External Power-on-reset function for Buck1 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. Package options include a tiny 4 x 4 x 0.8mm LLP 24-pin package and an even smaller 2.5 x 2.5mm micro SMD 25-bump package. Table 1. 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 (except “JJ11” and “FX6W” options) ±3% output voltage accuracy 300mA output current 30mV (typ) dropout 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2007–2011, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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