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 or 25–bump 2.5 x 2.5mm micro SMD 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 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 I 2C 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. Key Specification Step-Down DC/DC Converter (Buck) Linear Regulators (LDO) • 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 • Programmable VOUT of 1.0V–3.5V • (except “JJ11” and “FX6W” options) • ±3% output voltage accuracy • 300mA output current • 30mV (typ) dropout Applications • FPGA, DSP core power • Applications processors • Peripheral I/O power

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Datasheet

Title		Size	Date	Other Language
	LP3907 Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface	3084 Kbytes	22-Jul-09

Featured Application Notes

Title		Size	Date	Other Language
	AN-1619: Application Note 1619 Evaluation Kit for LP3907 — Programmable Power Management Unit with 1 2 C Compatible Interface	8282 Kbytes	4-Sep-07	中文

More Application Notes

Title		Size	Date	Other Language
	AN-1501: Application Note 1501 LP3905-30 Application Board Information	189 Kbytes	7-Mar-07	中文
	AN-1527: Application Note 1527 LP3905-A3 Application Board Information	158 Kbytes	5-Nov-07	中文
	AN-1532: Application Note 1532 LP3906 Evaluation Kit	5066 Kbytes	16-Mar-07