L5961_08 Datasheet, PDF (1/7 Pages) STMicroelectronics – MOST power management device (PMD)

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
■ Very low quiescent current (zero power mode
and ultra zero power mode feature)
■ Power management fully compatible to MOST
specification
■ Provides power supply for physical layer and
control unit
■ Switch to power pulse generator
■ Reacts on four different wake-up events
– Switch to power pulse (STPP)
– Light ON (for status)
– Activity on Diagnostic_I/O
– ON/OFF switch
■ I²C interface
■ Programmable system configuration
■ Reset generator
■ Intrinsic diagnostic transceiver
(standard LIN2.0)
■ 3 battery detectors for battery voltage
monitoring
■ Watchdog circuit
■ PowerSS0-36 and PowerSO-36 packages
options
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
diagnostic and fail-safe functions. The MOST
PMD is designed to provide direct power supply
PowerSO-36
PowerSSO-36
for the physical layer, the Network Controller and
the External Host Controller of a MOST Node.
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
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.
The L5961 is completely configurable through its
I²C bus and fully compatible with MOST
specifications.
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).
Table 1. Device summary
Order code
Package
L5961
PowerSSO-36
L5961PD
PowerSO-36
Packing
Tube
Tube
January 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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