LTC2924CGN#PBF Linear Technology, LTC2924CGN#PBF Datasheet - Page 13

• Manufacturer Part Number: LTC2924CGN#PBF
• Description: IC POWER SUPPLY SEQUENCER 16SSOP
• Manufacturer: Linear Technology

Specifications of LTC2924CGN#PBF

• Applications: Power Supply Sequencer
• Voltage - Supply: 3 V ~ 6 V
• Current - Supply: 1.5mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Input Voltage: 6V
• Output Current: 10µA
• Output Voltage: 4.5V
• No. Of Outputs: 4
• Supply Voltage Range: 3V To 6V
• No. Of Pins: 16
• Operating Temperature Range: 0°C To +70°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -

APPLICATIO S I FOR ATIO
Connecting Unused OUT and IN Pins
Figure 9 shows how to connect unused OUT and IN pins
on the LTC2924. Unused OUT-IN pairs must be connected
together to ensure proper operation.
Fault Detection
The LTC2924 has sophisticated fault detection which can
detect:
• Power On and Power Off sequence errors
• System controller command errors
• Power On timeout failure (with the power good timer
• Externally commanded faults (  F  A  U  L  T pin pulled low)
If any of the above faults are detected, the LTC2924
immediately pulls the OUT1-OUT4 pins low turning off
all of the power supplies. If the fault condition is detected
in one of the supplies controlled by the LTC2924 (an “in-
ternally generated” fault), the  F  A  U  L  T pin is immediately
pulled low indicating the fault condition.
enabled)
U
U
PS1
PS2
W
Figure 9. Connecting Unused OUT and IN Pins
U
IN1
IN2
IN3
IN4
LTC2924
OUT1
OUT2
OUT3
OUT4
Clearing the Fault Condition
In order to clear the fault condition within the LTC2924,
the following conditions must exist:
• All four IN pins must be below 0.61V
• The ON pin must be below 0.61V
• In the case of an externally generated fault, the
Fault Condition Indicator
If the LTC2924 receives a commanded fault (a cascaded
LTC2924 or an external source pulls down on the  F  A  U  L  T
pin) the LTC2924 will pull the TMR pin low. If the LTC2924
has detected the fault itself (from its internal fault detec-
tion circuits) it will indicate so by raising the TMR pin to
V
helpful while searching for the source of a fault condition
when multiple LTC2924s are cascaded.
If a fault occurs when the ON pin is high, the fault status
indication on the TMR pin will remain valid until the ON
pin goes low.
CC
 F  A  U  L  T pin must not be pulled down.
. This internal/external fault indicator can be especially
2924 F09
LTC2924
13
2924fa