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LTC2921

Features: · Tracks Multiple Supplies with MOSFET Switches· Monitors 5 Input Voltages Including VCC· Guaranteed Threshold Accuracy: ±1% at 0.5V· Automatic Remote Sense Switching· Adjustable Supply Ramp Rate· Overvoltage Monitor· Adjustable Electronic Circuit Breaker· Adjustable Power-Good Delay· Av...

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SeekIC No. : 004402153 Detail

LTC2921: Features: · Tracks Multiple Supplies with MOSFET Switches· Monitors 5 Input Voltages Including VCC· Guaranteed Threshold Accuracy: ±1% at 0.5V· Automatic Remote Sense Switching· Adjustable Supply Ra...

LTC2921 Data Sheet

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Part Number:
LTC2921
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/21

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Product Details

Description



Features:

· Tracks Multiple Supplies with MOSFET Switches
· Monitors 5 Input Voltages Including VCC
· Guaranteed Threshold Accuracy: ±1% at 0.5V
· Automatic Remote Sense Switching
· Adjustable Supply Ramp Rate
· Overvoltage Monitor
· Adjustable Electronic Circuit Breaker
· Adjustable Power-Good Delay
· Available for VCC Supply Voltages of 5V, 3.3V and 2.5V
· Available in 16-Pin Narrow SSOP (LTC2921 Series) and 20-Pin TSSOP (LTC2922 Series)


Application

· Desktop Computers
· Plug-In Cards
· Telecom Infrastructure
· Supply Sequencing
· Instruments


Pinout

Connection Diagram


Specifications

VCC Supply Voltage ...................................... 0.3V to 7V
V1, V2, V3, V4 Voltages ................................ 0.3V to 7V
SENSE Voltage ............................................. 0.3V to 7V
TIMER Voltage .............................. 0.3V to (VCC + 0.3V)
Charge Pumped Output Voltages
    GATE, PG.................................................. 0.3V to 12V
Switch Voltages
    S0, D0, S4, D4 (LTC2922 Series) ............... 0.3V to 7V
    S1, D1, S2, D2, S3, D3 .............................. 0.3V to 7V
Switch Currents (DC, RMS)
    S0, D0, S4, D4 (LTC2922 Series) ........................ 30mA
    S1, D1, S2, D2, S3, D3 ........................................ 30mA
Operating Ambient Temperature Range
    LTC2921C/LTC2922C ............................... 0°C to 70°C
    LTC2921I/LTC2922I ..............................40°C to 85°C
Junction Temperature  .......................................... 125°C
Storage Temperature Range ..................65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C


Description

The LTC®2921 and LTC2922 monitor up to five supplies and force them to track on power-up in multiple supply systems. Using external N-channel pass transistors, the supplies can be ramped up at an adjustable rate. Automatic remote sense switching allows the DC/DC converters to compensate for series voltage drops in the wiring. An incorrect level on one or more of the supplies triggers disconnect of all supplies. Tight 1% accuracy and glitch immunity on the low 0.5V monitoring level ensure no false error disconnects.

The LTC2921 and LTC2922 each feature an adjustable electronic circuit breaker to protect the VCC supply against short circuits. Capacitance at the TIMER pin programs the delays in the monitoring sequence.

The LTC2921 includes three remote sense switches in a 16-pin narrow SSOP package, while the LTC2922 includes five remote sense switches in a 20-pin TSSOP package. Both parts are available for VCC supply voltages of 5V, 3.3V, and 2.5V.




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