LP3907_14 Datasheet, PDF (1/57 Pages) Texas Instruments – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C-Compatible Interface

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
FEATURES
1
•2 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
• LP3907Q is an Automotive Grade product that
is AECQ-100 Grade 1 qualified
APPLICATIONS
• FPGA, DSP core power
• Applications processors
• Peripheral I/O power
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 V_OUT 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 V_OUT of 1.0V–3.5V
(except “JJ11” and “FX6W” options)
±3% output voltage accuracy
300mA output current
30mV (typ) dropout
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2
PRODUCTION DATA information is current as of publication date.
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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