LP8755_14 Datasheet, PDF (1/51 Pages) Texas Instruments – Multi-Phase 6-Core Step-Down Converter

LP8755
www.ti.com
SNVSA20 – NOVEMBER 2013
Multi-Phase 6-Core Step-Down Converter
Check for Samples: LP8755
FEATURES
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•23 Six High-Efficiency Step-Down DC/DC
Converter Cores:
– Max Output Current 15A
– Cores Bundled to a 6-Phase Converter
– Load Current Reporting
– Programmable Over-Current Protection
(OCP)
– Auto PWM/PFM and Forced-PWM
Operations and Automatic Low Power-
Mode Setting
– Auto Phase Adding/Shedding
– Remote Differential Feedback Voltage
Sensing
– Ramp Control
– V_OUT Range = 0.6V to 1.67V
• I²C-Compatible Interface which Supports
Standard (100 kHz), Fast (400 kHz), and High-
Speed (3.4 MHz) Modes
• Four Pin-Selectable I²C Addresses
• Interrupt Function with Programmable
Masking
• Output Short-Circuit and Input Over-voltage
Protection
• Spread Spectrum for EMI Reduction
• Over-Temperature Protection (OTP)
• Under-Voltage Lock-out (UVLO)
• 49-Bump 0.4 mm Pitch DSBGA Package,
2.99 mm x 2.85 mm
APPLICATIONS
• Smart Phones, eBooks and Tablets
• GSM, GPRS, EDGE, LTE, CDMA and WCDMA
Handsets
• Gaming Devices
DESCRIPTION
The LP8755 is designed to meet the power
management requirements of the latest applications
processors in mobile phones and similar portable
applications. The device contains six step-down
DC/DC converter cores, which are bundled together
in a 6-phase buck converter. The device is fully
controlled by a SmartReflex™-compatible interface or
an I²C-compatible serial interface.
The LP8755 focuses on high-efficiency, step-down
conversion over a wide output current range. The
step-down converter enters a low-power mode at light
load for maximum efficiency. The regulator supports
remote differential voltage sensing to compensate I*R
drop between the regulator output and the load. A
selectable spread spectrum mode reduces radiated
emissions.
The protection features include short-circuit
protection, current limits, output OVP, input OVP,
UVLO, temperature warning, and shutdown functions.
Several error flags are provided for status information
of the IC. In addition, I²C read-back includes total
load current and load current for each buck core: The
LP8755 has the ability to sense current being
delivered to the load without the addition of current
sense resistors. During startup, the device controls
the output slew rate to minimize output voltage
overshoot and the inrush current.
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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.
SmartReflex is a trademark of Texas Instruments Incorporated.
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All other trademarks are the property of their respective owners.
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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.
Copyright © 2013, Texas Instruments Incorporated