LTC2972 datasheet(43/112 Pages) LINER

Part #	LTC2972

Description	2-Channel PMBus Power System Manager Featuring Programmable Power Good Outputs

PDF	112 Pages

Scroll/Zoom	100%

Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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43 / 112 page

LTC2972

2972fa

For more information www.linear.com/LTC2972

When Mfr_config_track_en is enabled the channel is reconfigured to:

• Sequence down on fault, VIN_OFF, SHARE_CLK low or RESTORE_USER_ALL.

• Ignore UV during TOFF_DELAY. Note that ignoring UV during TON_RISE and TON_MAX_FAULT always happens

regardless of how this bit is set.

The following example illustrates configuring an LTC2972 with one master channel and one slave.

Master channel 0

TON_DELAY = Ton_delay_master

TON_RISE = Ton_rise_master

TOFF_DELAY = Toff_delay_master

Mfr_config_track_en = 0

Slave channel 1

TON_DELAY = Ton_delay_slave

TON_RISE = Ton_delay_master + Ton_rise_slave

TOFF_DELAY = Toff_delay_master + T_off_delay_slave

Mfr_config_track_en = 1

Where:

Ton_delay_master – Ton_delay_slave > RUN to TRACK setup time

Toff_delay_slave > time for master supply to fall.

The system response to a control pin toggle is illustrated in Figure 17.

The system response to a UV fault on a slave channel is illustrated in Figure 18.

PMBus COMMAND DESCRIPTION

LTC2972 Datasheet(PDF) 43 Page - Linear Technology