Output Current (A)
Efficiency (%)
0.001 0.01 0.1 1 10
50
60
70
80
90
100
D531
4PH, Vout=1.8V, Vin=3.7V
3PH, Vout=1.8V, Vin=3.7V
2PH, Vout=1.8V, Vin=3.7V
1PH, Vout=1.8V, Vin=3.7V
SW_B0
SW_B1
SW_B2
SW_B3
FB_B0
FB_B1
Configurable
multi-phase
1 - 4
Outputs
FB_B2
FB_B3
VIN_B0
VIN_B1
VIN_B2
VIN_B3
VANA
V
IN
NRST
SDA
SCL
nINT
CLKIN
EN1 (GPIO1)
EN2 (GPIO2)
EN3 (GPIO3) GNDs
PGOOD
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.
LP87521-Q1
LP87522-Q1
,
LP87523-Q1
,
LP87524-Q1
,
LP87525-Q1
SNVSB23 –MARCH 2018
LP8752x-Q1 10-A Buck Converter With Integrated Switches
1
1 Features
1
• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C4B
• Input Voltage: 2.8 V to 5.5 V
• Output Voltage: 0.6 V to 3.36 V
• Four High-Efficiency Step-Down DC/DC Converter
Cores:
– Maximum Output Current: 10 A
• Switching Frequency: 2 MHz
• Spread-Spectrum Mode and Phase Interleaving
• Configurable General Purpose I/O (GPIOs)
• I
2
C-Compatible Interface That Supports Standard
(100 kHz), Fast (400 kHz), Fast+ (1 MHz), and
High-Speed (3.4 MHz) Modes
• Interrupt Function With Programmable Masking
• Programmable Power-Good Signal (PGOOD)
• Output Short-Circuit and Overload Protection
• Overtemperature Warning and Protection
• Overvoltage Protection (OVP) and Undervoltage
Lockout (UVLO)
2 Applications
Automotive Infotainment, Cluster, Radar, and
Camera Power Applications
space
Simplified Schematic
3 Description
The LP8752x-Q1 device is designed to meet the
power-management requirements of the latest
processors and platforms in various automotive
power applications. The device contains four step-
down DC/DC converter cores, which are configured
as a 4-phase output, 3-phase and 1-phase outputs,
2-phase and 2-phase outputs, one 2-phase and two
1-phase outputs, or four 1-phase outputs. The device
is controlled by an I
2
C-compatible serial interface and
by enable signals.
The automatic pulse-width-modulation (PWM) to
pulsed-frequency-modulation (PFM) operation (AUTO
mode), together with the automatic phase adding and
phase shedding, maximizes efficiency over a wide
output-current range. The LP8752x-Q1 supports
remote differential-voltage sensing for multiphase
outputs to compensate IR drop between the regulator
output and the point-of-load (POL) improving the
accuracy of the output voltage. The switching clock
can be forced to PWM mode and also synchronized
to an external clock to minimize the disturbances.
The LP8752x-Q1 device supports load-current
measurement without the addition of external current-
sense resistors. The device also supports
programmable start-up and shutdown delays and
sequences synchronized to enable signals. The
sequences can include GPIO signals to control
external regulators, load switches, and processor
reset. During start-up and voltage change, the device
controls the output slew rate to minimize output-
voltage overshoot and in-rush current.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
LP87521-Q1
VQFN-HR (26) 4.50 mm × 4.00 mm
LP87522-Q1
LP87523-Q1
LP87524-Q1
LP87525-Q1
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency vs Output Current
