LP8758-B0 Datasheet, PDF (1/56 Pages) Texas Instruments – LP8758-B0 Four-Phase DC-DC Step-Down Converter

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LP8758-B0
SNVSA06B – MARCH 2015 – REVISED MAY 2016
LP8758-B0 Four-Phase DC-DC Step-Down Converter
1 Features
•1 High-Efficiency Step-Down Four-Phase DC-DC
Converter Cores:
– Maximum Output Current 16 A
– Auto PWM-PFM and Forced-PWM Operations
– Auto Phase Adding/Shedding and Force Multi-
Phase Operations
– Remote Differential Feedback Voltage Sensing
– Programmable Output Voltage Slew-Rate from
30 mV/µs to 0.5 mV/µs
– V_OUT Range = 0.5 V to 3.36 V with DVS
• Programmable Start-up and Shutdown Delays
with Enable Signal
• I²C-Compatible Interface which Supports Standard
(100 kHz), Fast (400 kHz), Fast+ (1 MHz), and
High-Speed (3.4 MHz) Modes
• Interrupt Function with Programmable Masking
• Load Current Measurement
• Output Short-Circuit and Overload Protection
• Spread-Spectrum Mode and Phase Interleaving
for EMI Reduction
• Overtemperature Warning and Protection
• Undervoltage Lockout (UVLO)
2 Applications
• Smart Phones, eBooks and Tablets
• Gaming Devices
3 Description
The LP8758 is designed to meet the power
management requirements of the latest application
processors in mobile phones and similar portable
applications. The device contains four step-down DC-
DC converter cores, which are bundled together in a
single 4-phase buck converter. The device is
controlled by an I²C-compatible serial interface.
The automatic PWM-PFM (AUTO mode) operation,
together with the automatic phase adding/shedding,
maximizes efficiency over a wide output-current
range. The LP8758 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 LP8758 supports programmable start-up and
shutdown delays synchronized to Enable signal.
The protection features include short-circuit
protection, current limits, input supply UVLO, and
temperature warning and shutdown functions.
Several error flags are provided for status information
of the device. In addition, the LP8758 device supports
load current measurement without the addition of
external current sense resistors. During start-up and
voltage change, the device controls the output slew
rate to minimize output voltage overshoot and the
inrush current.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP8758-B0
DSBGA (35)
2.88 mm × 2.13 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
LP8758
VIN
VIN_B0
SW_B0
VIN_B1
SW_B1
VIN_B2
SW_B2
VIN_B3
SW_B3
VANA
NRST
SDA
SCL
nINT
EN1
EN2
FB_B0
FB_B1
FB_B2
FB_B3
GNDs
VOUT
LOAD
Efficiency vs Output Current (V_IN = 3.7 V)
95
90
85
80
75
70
65
60
55
50
0.001
0.01
0.1
1
Output Current (A)
1.2 V
1.0 V
10 20
D038
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.