LP87332B-Q1 Datasheet, PDF (1/73 Pages) Texas Instruments – Dual High-Current Buck Converter and Dual Linear Regulator

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LP87332B-Q1
SNVSAT2 – JUNE 2017
LP87332B-Q1 Dual High-Current Buck Converter and Dual Linear Regulator
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
• Two High-Efficiency Step-Down DC-DC
Converters:
– Output Voltage: 0.7 V to 3.36 V
– Maximum Output Current 3 A
– Programmable Output-Voltage Slew Rate from
0.5 mV/µs to 10 mV/µs
– 2-MHz Switching Frequency
– Spread-Spectrum Mode and Phase
Interleaving for EMI Reduction
• Two Linear Regulators:
– Input Voltage: 2.5 V to 5.5 V
– Output Voltage: 0.8 V to 3.3 V
– Maximum Output Current 300 mA
• Configurable General-Purpose Output Signals
(GPO, GPO2)
• 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)
• 28-pin, 5-mm × 5-mm VQFN Package with
Wettable Flanks
Simplified Schematic
VIN
VIN_B0
SW_B0
VIN_B1
FB_B0
VIN_LDO0
VIN_LDO1
VOUT_B0
LOAD
VANA
SDA
SW_B1
SCL
FB_B1
nINT
EN
VOUT_LDO0
VOUT_LDO0
CLKIN (GPO2)
GPO
VOUT_LDO1
VOUT_LDO1
PGOOD
GNDs
VOUT_B1
LOAD
Copyright © 2017, Texas Instruments Incorporated
2 Applications
• Automotive Head Unit and Cluster
• Surround View System ECU
• Radar System ECU
• Automotive Camera Module
• Automotive Display
3 Description
The LP87332B-Q1 is designed to meet the power
management requirements in automotive
applications. The device contains two step-down DC-
DC converters and two linear regulators and general-
purpose digital-output signals. The device is
controlled by an I²C-compatible serial interface and
by an enable signal.
The automatic PWM/PFM (AUTO mode) operation
gives high efficiency over a wide output-current
range. The LP87332B-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 LP87332B-Q1 device supports programmable
start-up and shutdown delays and sequences
including GPO signals synchronized to the enable
signal. During start-up and voltage change, the
device controls the output slew rate to minimize
output voltage overshoot and the in-rush current.
PART NUMBER
LP87332B-Q1
Device Information
PACKAGE
BODY SIZE (NOM)
VQFN (28)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
DC-DC Efficiency vs Output Current
100
90
80
70
60
50
0.001
Vin=3.7V, Vout=1.0V
Vin=3.7V, Vout=1.8V
Vin=3.7V, Vout=2.5V
0.01
0.1
Output Current (A)
1
3
D001
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.