LP8754 Datasheet, PDF (1/53 Pages) Texas Instruments – LP8754 Multi-Phase Six-Core Step-Down Converter

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LP8754
SNVS861A – FEBRUARY 2014 – REVISED AUGUST 2014
LP8754 Multi-Phase Six-Core Step-Down Converter
1 Features
•1 Six High-Efficiency Step-Down DC/DC Converter
Cores:
– Max Output Current 10 A
– Cores Bundled to a 6-Phase Converter
– Load Current Reporting
– Programmable Overcurrent Protection (OCP)
– Auto PWM/PFM and Forced-PWM Operations
and Automatic Low Power-Mode Setting
– Automatic Phase Adding/Shedding
– Remote Differential Feedback Voltage Sensing
– Output Voltage Ramp Control
– V_OUT Range = 0.6 V to 1.67 V
• I²C-Compatible Interface which Supports Standard
(100 kHz), Fast (400 kHz), and High-Speed (3.4
MHz) Modes
• Four Selectable I²C Addresses
• Interrupt Function with Programmable Masking
• Output Short-Circuit and Input Overvoltage
Protection (OVP)
• Spread Spectrum and Phase Control for EMI
Reduction
• Overtemperature Protection (OTP)
• Undervoltage Lock-out (UVLO)
2 Applications
• Smart Phones, eBooks and Tablets
• GSM, GPRS, EDGE, LTE, CDMA and WCDMA
Handsets
• Gaming Devices
3 Description
The LP8754 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 Dynamic Voltage Scaling (DVS)
interface or an I²C-compatible serial interface.
The automatic PWM/PFM operation together with the
automatic phase adding/shedding maximizes
efficiency over a wide output current range. The
LP8754 supports remote differential voltage sensing
to compensate IR drop between the regulator output
and the point-of-load thus improving the accuracy of
the output voltage.
The protection features include short-circuit
protection, current limits, 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
LP8754 has the ability to sense current being
delivered to the load without the addition of current
sense resistors. During start-up, the device controls
the output voltage slew rate to minimize overshoot
and the inrush current.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (MAX)
LP8754
DSBGA (49)
3.022 mm x 2.882 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs. Load Current
100
Low-Power PFM Mode
PFM Mode
90
PWM Mode
80
70
60
50
1
V_IN = 3.7 V, V_OUT = 1.1 V
10
100
1000
OUTPUT CURRENT (mA)
10000
C027
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.