This is information on a product in full production.
September 2013 DocID7510 Rev 2 1/18
L5951
Triple output multifunction voltage regulator
for car radio with IDR/class2 interface
Datasheet - production data
Features
3 voltage regulators:
3.3 V (100 mA) standby regulator
5 V (100 mA) stand-by regulator
7.8 V (100 mA)
Out of regulation detection for 5 V standby
regulator
Wide operating supply voltage range from
4.5 V up to 26.5 V for transient 34 V
Very low standby quiescent current (<150 µA)
Input to output signal transfer function
programmable
LVS function
TTL and CMOS compatible inputs
Output current limitation
Controlled output slope for low EMI
Overtemperature shut-down
Able to survive under loss of ground or battery
ESD protected
Description
The L5951 is a monolithic triple regulator
integrated with a SAE J1850 Integrated Driver /
Receiver realized in advanced Multipower-BCD
technology. It is intended to drive single wire
J1850 communications, and offer microcontroller
power and power management for automotive or
industrial applications.
SO-24
Table 1. Device summary
Order code Package Packing
L5951 SO-24 Tube
www.st.com
Obsolete Product(s) - Obsolete Product(s)
Contents L5951
2/18 DocID7510 Rev 2
Contents
1 Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 REG1 output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 REG2 output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 REG3 output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.6 Protocol description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 BUS timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Typical reset circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Obsolete Product(s) - Obsolete Product(s)
DocID7510 Rev 2 3/18
L5951 Block diagram and pins description
18
1 Block diagram and pins description
1.1 Block diagram
Figure 1. Block diagram
SUPPLY
SELECTOR
BANDGAP
REFERENCE
3V
STANDBY
5V
STANDBY
RESET
ENABLE/
PROTECTION
LOGIC
7.8V
BUS DRIVER
WAVESHAPING
FILTER
4XEN AND
LOOPBACK
DIGITAL OUTPUT
DRIVER
LOSS
OF GND
PROTECTION
LOAD
GND
BUS
REG3
RESET
REG2
REG1
VBAT
LVS
EN
SLEEP
TX
4X
LOOP
RX
D99AU991
Obsolete Product(s) - Obsolete Product(s)

L5951

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
Linear Voltage Regulators 3-Output 3.3/5/7.8V
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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