LP87524B-Q1 Datasheet, PDF (1/71 Pages) Texas Instruments – 4-A + 2.5-A + Two 1.5-A Buck Converters with Integrated Switches

Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
LP87524B-Q1
SNVSAW2 – APRIL 2017
LP87524B-Q1 4-A + 2.5-A + Two 1.5-A Buck Converters with Integrated Switches
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
• 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:
– Total Output Current Up To 10 A
– Output Voltage Slew-Rate 3.8 mV/µs
• 4-MHz Switching Frequency
• Spread-Spectrum Mode and Phase Interleaving
• Configurable General Purpose I/O (GPIOs)
• 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
• 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
space
3 Description
The LP87524B-Q1 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 4 single
phase outputs. The device is controlled by an I²C-
compatible serial interface and by enable signals.
The automatic PFM/PWM (AUTO mode) operation
maximizes efficiency over a wide output-current
range. The LP87524B-Q1 supports remote voltage
sensing to compensate IR drop between the regulator
output and the point-of-load (POL) thus improving the
accuracy of the output voltage. In addition the
switching clock can be forced to PWM mode and also
synchronized to an external clock to minimize the
disturbances.
The LP87524B-Q1 device supports load-current
measurement without the addition of external current-
sense resistors. In addition, the LP87524B-Q1 device
supports programmable start-up and shutdown
delays and sequences synchronized to enable
signals. The sequences can also 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 the in-rush
current.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP87524B-Q1
VQFN (26)
4.50 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
VIN
SW_B0
VIN_B0
FB_B0
VIN_B1
VIN_B2
VIN_B3
VANA
SW_B1
FB_B1
NRST
SDA
SCL
nINT
SW_B2
FB_B2
CLKIN
EN1 (GPIO1)
EN2 (GPIO2)
EN3 (GPIO3)
SW_B3
FB_B3
PGOOD
GNDs
VOUT1
LOAD
VOUT2
LOAD
VOUT3
LOAD
VOUT4
LOAD
Efficiency vs Output Current
100
90
80
70
60
50
0.001
1PH, VOUT = 1V, AUTO
1PH, VOUT = 1.8V, AUTO
1PH, VOUT = 2.5V, AUTO
0.01
0.1
1
5
Output Current (A)
D922
Copyright © 2017, Texas Instruments Incorporated
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.