LP3906SQ-JXXI Datasheet, PDF (1/47 Pages) Texas Instruments – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C ompatible

LP3906
www.ti.com
SNVS456M – AUGUST 2006 – REVISED MAY 2013
Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible
Interface
Check for Samples: LP3906
FEATURES
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•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 5 × 4 × 0.8 mm WQFN Package
• Software Programmable Regulators
APPLICATIONS
• FPGA, DSP Core Power
• Applications Processors
• Peripheral I/O Power
KEY SPECIFICATIONS
• DC/DC Converter (Buck)
– 1.5A Output Current
– Programmable V_OUT from:
– Buck1 : 0.8V–2.0V
– Buck2 : 1.0V–3.5V
– Up to 96% Efficiency
– 2 MHz PWM Switching Frequency
– ±3% Output Voltage Accuracy
– Automatic Soft Start
• Linear Regulators (LDO)
– Programmable V_OUT of 1.0V–3.5V
– ±3% Output Voltage Accuracy
– 300 mA Output Currents
– 25 mW (Typ) Dropout
DESCRIPTION
The LP3906 is a multi-function, programmable Power
Management Unit, optimized for low power FPGAs,
Microprocessors and DSPs.
Typical Application Circuits
0.47 PF
1 PF
1 PF
0.47 PF
EN_T
ENLDO1
ENLDO2
ENSW1
ENSW2
LDO1
VINLDO1
VINLDO2
LDO2
SDA
SCL
GND_L
GND_C
VINLDO12
SYNC
VIN1
LP3906
SW1
FB1
GND_SW1
VIN2
DAP
SW2
FB2
GND_SW2
AVDD
1 PF
10 PF
2.2 PH
10 PF
10 PF
2.2 PH
10 PF
1 PF
Figure 1. Typical Application Circuit
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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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