L5961| Datasheet

L5961, L5961PD

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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
PowerSSO-36 PowerSO-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 reverification 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 25uA current) and Ultra-zero power mode (5uA). 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
Package PowerSSO-36 PowerSO-36 Packing Tube Tube

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

Order code L5961 L5961PD

January 2008

Rev 1

1/7
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