LT8309IS5#TRMPBF
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Analog Devices Inc. LT8309IS5#TRMPBF

Manufacturer No:
LT8309IS5#TRMPBF
Manufacturer:
Analog Devices Inc.
Package:
Tape & Reel (TR)
Description:
IC REG FLYBACK ISO ADJ TSOT23-5
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The LT8309IS5#TRMPBF, produced by Analog Devices Inc., is a secondary-side synchronous rectifier driver designed to replace the output rectifier diode in flyback topologies. This component enhances efficiency and reduces heat constraints associated with traditional diodes by utilizing an N-channel MOSFET. It operates in both discontinuous conduction mode (DCM) and critical conduction mode (CrCM), making it versatile for various high-efficiency flyback applications.

Key Specifications

Parameter Value Unit
VCC Range 4.5V to 40V V
Maximum MOSFET Voltage Up to 150V V
Turn-Off Propagation Delay 26ns ns
Gate Driver Pull-Down Resistance 0.8Ω Ω
Quiescent Current 400µA µA
Package Type 5-Lead Plastic TSOT-23
Operating Temperature Range –40°C to 125°C (LT8309I), –40°C to 150°C (LT8309H) °C

Key Features

  • Works with DCM and BCM/CrCM conduction modes
  • Supports up to 150V MOSFETs
  • Accurate minimum on and off timers for reliable operation
  • Adjustable and accurate trip point: +5mV to –30mV
  • Fast turn-off propagation delay of 26ns
  • Low quiescent current of 400µA for high efficiency at low output currents
  • Gate driver with 0.8Ω pull-down resistance for fast turn-offs
  • Overtemperature protection

Applications

  • High output current flybacks
  • High efficiency flybacks
  • Isolated telecom supplies
  • Other applications requiring high efficiency and low heat generation in flyback topologies

Q & A

  1. What is the primary function of the LT8309IS5#TRMPBF?

    The LT8309IS5#TRMPBF is a secondary-side synchronous rectifier driver that replaces the output rectifier diode in flyback topologies.

  2. What are the supported conduction modes for the LT8309?

    The LT8309 supports both discontinuous conduction mode (DCM) and critical conduction mode (CrCM).

  3. What is the maximum MOSFET voltage supported by the LT8309?

    The LT8309 supports up to 150V MOSFETs.

  4. What is the turn-off propagation delay of the LT8309?

    The turn-off propagation delay of the LT8309 is 26ns.

  5. What is the quiescent current of the LT8309?

    The quiescent current of the LT8309 is 400µA.

  6. What is the operating temperature range for the LT8309I and LT8309H versions?

    The operating temperature range is –40°C to 125°C for the LT8309I and –40°C to 150°C for the LT8309H.

  7. What type of package does the LT8309 come in?

    The LT8309 comes in a 5-Lead Plastic TSOT-23 package.

  8. Does the LT8309 have overtemperature protection?
  9. What are some typical applications of the LT8309?

    Typical applications include high output current flybacks, high efficiency flybacks, and isolated telecom supplies.

  10. How does the LT8309 improve efficiency in flyback topologies?

    The LT8309 improves efficiency by replacing the output rectifier diode with an N-channel MOSFET, reducing heat constraints and improving overall efficiency.

Product Attributes

Applications:Secondary-Side Controller
Voltage - Input:- 
Voltage - Supply:4.5V ~ 40V
Current - Supply:300 µA
Operating Temperature:-40°C ~ 125°C
Mounting Type:Surface Mount
Package / Case:SOT-23-5 Thin, TSOT-23-5
Supplier Device Package:TSOT-23-5
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Similar Products

Part Number LT8309IS5#TRMPBF LT8309IS5#TRPBF LT8309ES5#TRMPBF LT8309HS5#TRMPBF
Manufacturer Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc.
Product Status Active Active Active Active
Applications Secondary-Side Controller Secondary-Side Controller Secondary-Side Controller Secondary-Side Controller
Voltage - Input - - - -
Voltage - Supply 4.5V ~ 40V 4.5V ~ 40V 4.5V ~ 40V 4.5V ~ 40V
Current - Supply 300 µA 300 µA 300 µA 300 µA
Operating Temperature -40°C ~ 125°C -40°C ~ 125°C -40°C ~ 125°C -40°C ~ 150°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case SOT-23-5 Thin, TSOT-23-5 SOT-23-5 Thin, TSOT-23-5 SOT-23-5 Thin, TSOT-23-5 SOT-23-5 Thin, TSOT-23-5
Supplier Device Package TSOT-23-5 TSOT-23-5 TSOT-23-5 TSOT-23-5

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