Overview
The LTC4359HMS8#PBF, produced by Analog Devices Inc., is a positive high voltage ideal diode controller designed to drive an external N-channel MOSFET, effectively replacing a Schottky diode. This device is optimized for applications requiring low power consumption, reduced heat dissipation, and minimal voltage loss. It ensures smooth current delivery without oscillation, even at light loads, and features a fast turn-off mechanism to minimize reverse current transients in case of power source failure or shorting.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN Operating Supply Range | 4 | 80 | V | ||
| IIN IN Current | IN = 12V, SHDN = 0V | 30 | 150 | µA | |
| Operating Ambient Temperature Range | −40°C to 125°C | °C | |||
| Storage Temperature Range | −65°C to 150°C | °C | |||
| Lead Temperature (Soldering, 10 sec) | 300°C | °C | |||
| Shutdown Quiescent Current | Load Switch | 9 | µA | ||
| Shutdown Quiescent Current | Ideal Diode | 14 | µA |
Key Features
- Drives an external N-channel MOSFET to replace a Schottky diode, reducing power consumption and heat dissipation.
- Ensures smooth current delivery without oscillation, even at light loads.
- Fast turn-off mechanism to minimize reverse current transients in case of power source failure or shorting.
- Shutdown mode reduces quiescent current to 9µA for load switch and 14µA for ideal diode applications.
- Wide operating voltage range (4V to 80V) and high temperature rating (−40°C to 125°C).
- Reverse input protection and the ability to withstand reverse input voltage.
- Supports automotive and telecom applications with controlled manufacturing for automotive reliability.
Applications
- Automotive systems: Ideal for applications requiring high reliability and wide operating temperature ranges.
- Telecom systems: Suitable for power management in telecommunications equipment.
- Load switching and inrush control: Can be used to control power flow in the forward direction while retaining ideal diode behavior in the reverse direction.
- Cable drop compensation and power-over-Ethernet (PoE) interface controllers.
- Hot swap controllers, high-side switches, and MOSFET drivers.
Q & A
- What is the primary function of the LTC4359HMS8#PBF?
The LTC4359HMS8#PBF is a positive high voltage ideal diode controller that drives an external N-channel MOSFET to replace a Schottky diode.
- What is the operating supply voltage range of the LTC4359HMS8#PBF?
The operating supply voltage range is from 4V to 80V.
- What is the shutdown quiescent current for load switch and ideal diode applications?
The shutdown quiescent current is 9µA for load switch applications and 14µA for ideal diode applications.
- What are the key benefits of using the LTC4359HMS8#PBF over traditional Schottky diodes?
The key benefits include reduced power consumption, heat dissipation, and voltage loss, along with smooth current delivery without oscillation.
- What are the typical applications of the LTC4359HMS8#PBF?
Typical applications include automotive systems, telecom systems, load switching, and inrush control, as well as cable drop compensation and PoE interface controllers.
- How does the LTC4359HMS8#PBF handle reverse current transients?
The device features a fast turn-off mechanism that connects the GATE to the SOURCE pin within 0.3µs, turning off the MOSFET to minimize reverse current transients.
- What is the temperature range for the LTC4359HMS8#PBF?
The operating ambient temperature range is from −40°C to 125°C.
- Is the LTC4359HMS8#PBF suitable for automotive applications?
Yes, versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications, designated with a #W suffix.
- How does the LTC4359HMS8#PBF ensure smooth current delivery?
The device controls the forward-voltage drop across the MOSFET to ensure smooth current delivery without oscillation, even at light loads.
- What is the lead temperature for soldering?
The lead temperature for soldering is 300°C for 10 seconds.
