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Datasheet Linear Technology LTC1728-5

ManufacturerLinear Technology
SeriesLTC1728-5

Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages

Datasheets

  • Download » Datasheet, PDF, 332 Kb, Revision: D, File uploaded 10-24-2017
    LTC1727/LTC1728 - Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages
    Docket ↓
    LTC1727/LTC1728
    Micropower Precision
    Triple Supply Monitors in 8-Lead MSOP
    and 5-Lead SOT-23 Packages
    DESCRIPTION FEATURES Monitors Three Inputs Simultaneously LTC1727-5: 5V, 3.3V and ADJ LTC1727-2.5: 2.5V, 3.3V and ADJ LTC1728-5: 5V, 3.3V and ADJ LTC1728-2.5: 2.5V, 3.3V and ADJ LTC1728-1.8: 3V, 1.8V and ADJ LTC1728-3.3: 3.3V, 1.8V and ADJ
    n ±1.5% Threshold Accuracy Over Temperature
    n Very Low Supply Current: 10µA Typ
    n 200ms Reset Time Delay
    n Active Low RESET Output
    n Power Supply Glitch Immunity
    n Guaranteed RESET for V
    CC3 ≥ 1V
    or VCC5 /VCC25/VCC18 ≥ 1V
    n LTC1727 Includes Monitor Output for Each Supply
    n LTC1727: 8-Lead MSOP and SO Packages
    n LTC1728: 5-Lead SOT-23 Package
    n APPLICATIONS n n n The LTC®1727 is a triple supply monitor intended for
    systems with multiple supply voltages. Each supply monitor has its own open-drain output for individual supply
    monitoring. A common open-drain reset output remains
    low until all three supplies have been in compliance for
    200ms. Tight 1.5% accuracy specifications and glitch
    immunity ensure reliable reset operation without false
    triggering. ...

Prices

Packaging

Parametrics

LTC1728ES5-5#PBFLTC1728ES5-5#TRMPBFLTC1728ES5-5#TRPBFLTC1728HS5-5#PBFLTC1728HS5-5#TRMPBFLTC1728HS5-5#TRPBF
Design ToolsLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice Model
Export Controlnononononono
FeaturesSupervisorSupervisorSupervisorSupervisorSupervisorSupervisor
Isupply, A151515151515
Minimum Reset Level, V111111
Number of Supplies333333
Operating Temperature Range, °C0 to 850 to 850 to 85-40 to 125-40 to 125-40 to 125
Power Fail Warningnononononono
Power Up/Down Resetyesyesyesyesyesyes
Reset Pulse Width200ms200ms200ms200ms200ms200ms
Reset Voltage5V5V5V5V5V5V
Second Reset Voltage3.3V3.3V3.3V3.3V3.3V3.3V
Third Reset VoltageAdjAdjAdjAdjAdjAdj
Threshold Accuracy, %1.51.51.51.51.51.5
Vs Max, V777777
Watchdog Timernononononono

Eco Plan

Other Options

LTC1727-2.5 LTC1727-5 LTC1728-1.8 LTC1728-2.5 LTC1728-3.3

Articles

  • Download » Articles - LT Journal, PDF, 204 Kb, File published 12-01-2003
    Hot Swap Controller with Power-Up Timeout Function Simplifies Hot Swapping Boards with Multiple Power Supplies
    Docket ↓
    DESIGN FEATURES Hot Swap Controller with
    Power-Up Timeout Function
    Simplifies Hot Swapping Boards
    with Multiple Power Supplies
    by Anthony Ng and YK Sim Introduction
    The LTC4212 is a Hot Swap controller that allows safe board insertion
    and removal from a live backplane.
    It features a supply range of 2.5V to
    16.5V, programmable soft-start with
    inrush current limiting, automatic retry or latched mode operation, a high
    side drive for an external N-channel
    MOSFET and dual level overcurrent
    fault protection.
    Unlike many Hot Swap controllers,
    the LTC4212 does not monitor the load
    side of the MOSFET directly. Instead,
    the LTC4212 interfaces with external
    power supply monitor ICs or directly
    with the PGOOD pin of a switching
    regulator. This permits the LTC4212 to
    monitor any number of supplies on the
    board. It has a power-up timeout function that disconnects a card from the
    backplane supply when the monitored ...
  • Download » Articles - LT Journal, PDF, 235 Kb, File published 05-01-2001
    Ramp Three Supplies with a Supply Monitor and Hot Swap Controller
    Docket ↓
    DESIGN IDEAS Ramp Three Supplies with a Supply
    Monitor and Hot Swap Controller
    by Mitchell Lee
    Many digital systems with multiple
    supply voltages require simultaneous
    ramping of supplies at power up. Since
    the power supply usually consists of
    separate regulators for each voltage,
    it is impossible to guarantee simultaneity of output. The circuit shown in
    Figure 1 ramps the outputs of three
    supplies and ensures tracking at
    power up and during recovery from a
    fault.
    Regulators invariably start up at
    different rates and different times
    based on current capability, filter
    capacitance and loop characteristics,
    so there are no guarantees as to how
    or when the outputs will rise to their
    respective voltages. In this case, an
    LTC1728-2.5 triple supply monitor
    keeps watch over each of three regulated supplies (1.8V, 2.5V and 3.3V).
    continued on page 27 Q1 1.8V/15A ...

Moldel Line

Series: LTC1728-5 (6)

Manufacturer's Classification

  • Monitor, Control and Protection > Supervisory Circuits > Triple Supply Monitors
  • Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) System Monitor

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