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STMicroelectronics Electronic Components Datasheet

L5965SQ Datasheet

Power management

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L5965
Datasheet
Power management for automotive vision and radar systems
Features
VFQFPN-48 (7x7 mm)
Product status link
L5965
Product summary
GAPGPS03203
AEC-Q100 qualified
Pre SMPS BUCK1 regulator controller, adjustable via OTP to 0.8 V, 1.0 V, 1.1 V,
1.2 V, 1.8 V, 3.3 V, 3.8 V, 5.0 V @ 0.4 MHz
Pre SMPS BUCK2 regulator, adjustable via OTP to 1.0 V, 1.1 V, 1.2 V, 1.35 V,
1.5 V, 3.3 V, 3.6 V, 5.0 V @ 1.35/2.6 A min peak current limit, 0.4/2.4 MHz
Post SMPS BUCK3 regulator, adjustable via OTP to 1.0 V, 1.2 V, 1.35 V, 1.8 V,
2.0 V, 2.3 V, 2.5 V, 3.3 V @ 1.4 A min peak current limit, 2.4 MHz
Post SMPS BUCK4 regulator, adjustable via OTP to 1.1 V, 1.12 V, 1.2 V, 1.25 V,
1.3 V, 1.35 V, 1.8 V, 3.3 V @ 1 A min peak current limit, 2.4 MHz
Post SMPS BOOST regulator, adjustable via OTP to 5.0 V @ 0.3 A max load
current, 7.0 V @ 0.2 A max load current, 2.4 MHz
Post Linear regulator LDO, adjustable via OTP to 1.2 V, 1.25 V, 1.3 V, 1.8 V,
2.5 V, 2.8 V, 3.3 V, 5.0 V @ 300/600 mA max load current
Precise Voltage reference, adjustable via OTP to 1.8 V, 2.5 V, 3.3 V,
4.1 V @ 20 mA max load current
SPI interface with CRC
Programmable slew rate/soft start
Voltage supervisors
Spread frequency spectrum
Reset and reset activation list
Adjustable window watchdog supervisors
Power up phase programmable via OTP
Short circuit protected outputs and Fault detection pin to Microcontroller
Low external components number
Thermal shutdown junction temperature 175 °C
Order code Package Packing
L5965SQ-V0Y
VFQFPN-48
L5965SQ-V0T
Tray
Tape and
reel
Description
L5965 is a multiple voltage regulator composed by two battery compatible BUCK pre-
regulators (one of which is a controller), two BUCK post regulators with internal
compensation, one BOOST, one LDO and a precise voltage reference regulator. All
the regulators, except the BUCK1 pre-regulator, have internal power switches.
OTP (One Time Programmable) cells are used for the main device parameters
programming (output voltages and currents, switching frequencies) and to configure
power up sequence.
An SPI interface can be used to enable or disable the single voltage regulators, for
diagnostic information and to program internal blocks parameters (monitor and
Power Good thresholds, slew rate, etc.).
The device offers a set of features to support applications that need to fulfill functional
safety requirements as defined by Automotive Safety Integrity Level (ASIL) A-B-C-D.
DS12567 - Rev 2 - May 2019
For further information contact your local STMicroelectronics sales office.
www.st.com


STMicroelectronics Electronic Components Datasheet

L5965SQ Datasheet

Power management

No Preview Available !

L5965
Overview
1
Overview
L5965 is a multichannel voltage regulator able to offer flexibility and ease to use, together with a set of features
that make it compliant to car passenger applications that require a certain level of safety. The product includes
input and output monitors, independent band-gaps, ground loss monitors, internal compensation networks, that
also help reduce the BOM, digital and analog BIST, fault pin.
In this product, there are 7 different regulators. A first battery-compatible regulator, a controller that can supply
several current flow thanks to the use of external MOSs. A second regulator with integrated MOS that can be
used as a pre-regulator for currents up to about 2.6 A. Two bucks, post regulators, one boost that can be used to
supply, for example, a CAN bus, one LDO and a 1% accurate reference voltage for the microcontroller.
All output voltages can be selected via memory cells (OTP) that can be programmed before using the PMIC. This
guarantees precision and safety, since output voltages are not susceptible to variations due to the external
environment. It also contributes to reducing the number of external components. Through the OTP it is also
possible to decide the switching frequency of some regulators, the current limitation, select the main buck and the
system power-on sequence.
Programming can also be done at customer’s production line.
There is also an SPI bus, used to program the PMIC and to communicate with the microcontroller. Through this
bus it is possible to set overvoltage and undervoltage thresholds, enable the spread spectrum, select the soft start
time and many other things. The SPI is also used to communicate the status of the bucks in case of fault, over-
temperature or other events.
The maximum free run switching frequency of the bucks is 2.4 MHz, modifiable through external synchronization
signals.
The PMIC can manage watchdog and reset signals.
1.1
Simplified block diagram
WKUP
Figure 1. Simplified block diagram
VBAT INDEPENDENT SUPPLIES
Voltage
references
Pre-BUCK1
controller
Buck pre/post regulator compatible to battery V
5-3.8-3.3-1.8-1.2-1.1-1.0-0.8 V @ 0.4 MHz
FAULT
Safety
management
RESETB
Watchdog &
Reset
SPI
SYNC_IN
SYNC_OUT
SPI
OTP
Diagnostics
Oscillator
Pre-BUCK2
BUCK3
Internal
compensation
BUCK4
Internal
compensation
BOOST
Supervisors
LDO
Supervisors
VREF
Supervisors
Buck pre/post regulator compatible to battery V
5.0-3.6-3.3-1.5-1.35-1.2-1.1-1.0 V @ 1.35-2.6 A ● 0.4-2.4 MHz
Buck post regulator compatible to 5.5 V max
3.3-2.5-2.3-2.0-1.8-1.35-1.2-1.0 V @ 1.4 A ● 2.4 MHz
Buck post regulator compatible to 5.5 V max
3.3-1.8-1.35-1.3-1.25-1.2-1.12-1.1 V @ 1 A ● 2.4 MHz
Boost post regulator compatible to 5.5 V max
7 V @ 0.2 A, 5 V @ 0.3 A ● 2.4 MHz
Linear post regulator compatible to 5.5 V max
5-3.3-2.8-2.5-1.8-1.3-1.25-1.2 V @ 300-600 mA
Internally connected to the battery
4.1 - 3.3 - 2.5 - 1.8 V @ 20 mA
Note: Buck min peak currents.
GAPG1005181515PS
DS12567 - Rev 2
page 2/85


Part Number L5965SQ
Description Power management
Maker STMicroelectronics
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