L5961
MOST power management device (PMD)
Data Brief
Features
■ 5V or 3.3V / 650mA DC-DC Converter with
external sync
■ 5V or 3.3V/ 40mA standby voltage regulator
■ 5V or 3.3V / 60mA switchable voltage regulator
PowerSO-36
■ Very low quiescent current (zero power mode
and ultra zero power mode feature)
■ Power management fully compatible to MOST
PowerSSO-36
specification
■ Provides power supply for physical layer and
for the physical layer, the Network Controller and
the External Host Controller of a MOST Node.
control unit
■ Switch to power pulse generator
The L5961 also allows the implementation of a
generic MOST node design that can be
reproduced "as is" in any other project, thus
avoiding the activities of redesign and re-
verification of MOST PMD compliance
■ Reacts on four different wake-up events
–
–
–
–
Switch to power pulse (STPP)
Light ON (for status)
Activity on Diagnostic_I/O
ON/OFF switch
The L5961 implements complete monitoring of
the supply voltage (over-voltage, under-voltage,
critical voltage), moreover it supports multiple
power modes like Zeropower-mode (where one
complete MOST node sinks around 25µA current)
and Ultra-zero power mode (5µA). All the
diagnostic protocols from major carmakers are
supported and the device reacts to many different
wake-up events.
2
■ I C interface
■ Programmable system configuration
■ Reset generator
■ Intrinsic diagnostic transceiver
(standard LIN2.0)
■ 3 battery detectors for battery voltage
monitoring
The L5961 is completely configurable through its
2
■ Watchdog circuit
I C bus and fully compatible with MOST
specifications.
■ PowerSS0-36 and PowerSO-36 packages
options
L5961 has been specified in cooperation with
SMSC and represents a "chipset" solution when
used with SMSC's MOST network interface
controllers (INIC or NIC).
Description
The L5961 MOST PMD integrates all the discrete
circuitry usually necessary to implement power
supplies and power management for a MOST
node. It includes intrinsic MOST specific power
management together with sophisticated
Table 1.
Order code
L5961
L5961PD
Device summary
Package
Packing
PowerSSO-36
PowerSO-36
Tube
Tube
diagnostic and fail-safe functions. The MOST
PMD is designed to provide direct power supply
January 2008
Rev 1
1/7
For further information contact your local STMicroelectronics sales office.
www.st.com
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