LP3907-Q1 Datasheet, PDF (1/53 Pages) Texas Instruments – Dual High-Current Step-Down DC-DC And Dual Linear Regulator

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LP3907-Q1
SNVSA55A – DECEMBER 2014 – REVISED MAY 2015
LP3907-Q1 Dual High-Current Step-Down DC-DC And Dual Linear Regulator With I²C
Interface
1 Features
•1 Input Voltage Range: 2.8 V to 5.5 V
• 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
• Software Programmable Regulators
• External Power-On-Reset Function for Buck1 and
Buck2 (Power Good with Delay Function)
• Undervoltage Lockout Detector to Monitor Input
Supply Voltage
• Step-Down DC-DC Converter (Buck)
– Programmable V_OUT from:
– Buck1 : 0.8 V - 2 V at 1 A
– Buck2 : 1 V - 3.5 V at 600 mA
– Up to 96% Efficiency
– 2.1-MHz PWM Switching Frequency
– PWM-to-PFM Automatic Mode Change
Under Low Loads
– ±3% Output Voltage Accuracy
– Automatic Soft Start
• Linear Regulators (LDO)
– Programmable V_OUT of 1 V to 3.5 V
– ±3% Output Voltage Accuracy
– 300-mA Output Current
– 30-mV (typical) Dropout
2 Applications
• FPGA, DSP Core Power
• Applications Processors
• Peripheral I/O Power
3 Description
The LP3907-Q1 is a multi-function, programmable
Power Management Unit, optimized for low power
FPGAs, microprocessors, and DSPs. This device
integrates two highly efficient 1-A/600-mA step-down
DC-DC converters with dynamic voltage management
(DVM), two 300-mA linear regulators, and a 400-kHz
I²C interface to allow a host controller access to the
internal control registers of the device. The LP3907-
Q1 additionally features programmable power-on
sequencing. This device is an Automotive-Grade
Product that is AECQ-100 Grade 1 Qualified.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP3907-Q1
WQFN (24)
DSBGA (25)
4.00 mm x 4.00 mm
2.49 mm x 2.49 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Circuit
0.47 2F
1 2F
1 2F
0.47 2F
EN_T
ENLDO1
ENLDO2
VINLDO12
VDD
100k
nPOR
1 2F
ENSW1
ENSW2
LDO1
VIN1
SW1
10 2F
2.2 2H
FB1
10 2F
VINLDO1
GND_SW1
LP3907-Q1
VINLDO2
VIN2
LDO2
SDA
SCL
GND_L
SW2
FB2
GND_SW2
10 2F
2.2 2H
10 2F
GND_C
DAP
AVDD
1 2F
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.