LTC4359C

Part: LTC4359 — Analog Devices (formerly Linear Technology)

Type: Ideal Diode Controller

Description: A positive high voltage ideal diode controller that drives an external N-channel MOSFET to replace a Schottky diode, featuring a wide 4V to 80V operating range, reverse input protection to -40V, and low 9μA shutdown current.

Operating Conditions:

• Supply voltage: 4–80 V
• Operating temperature: -40 to 85 °C (suffix-dependent — see Order Information table for grade-specific ranges)

Absolute Maximum Ratings:

• Max supply voltage (IN, SOURCE, SHDN): 100 V
• Max output voltage (OUT): 100 V
• Max IN - OUT differential voltage: 100 V
• Max GATE - SOURCE differential voltage: 10 V
• Max storage temperature: 150 °C

Key Specs:

• Operating Supply Range (V IN): 4–80 V
• IN Current (Operating): 150 μA (typ)
• IN Current (Shutdown, IN = OUT = 12V): 9 μA (typ)
• Gate Drive (GATE-SOURCE, IN = 8V to 80V): 10–15 V
• Source-Drain Regulation Voltage (IN -OUT): 20–45 mV (typ 30 mV)
• Gate Turn-Off Delay Time: 0.3 μs (typ)
• SHDN Pin Input Threshold: 0.6–2 V
• Reverse SOURCE Threshold for GATE Off: -0.9 to -2.7 V (typ -1.8 V)

Features:

• Reduces Power Dissipation by Replacing a Power Schottky Diode
• Wide Operating Voltage Range: 4V to 80V
• Reverse Input Protection to -40V
• Low 9μA Shutdown Current
• Low 150μA Operating Current
• Smooth Switchover without Oscillation
• Controls Single or Back-to-Back N-Channel MOSFETs
• AEC-Q100 Qualified for Automotive Applications

Applications:

• Automotive Battery Protection
• Redundant Power Supplies
• Supply Holdup
• Telecom Infrastructure
• Computer Systems/Servers
• Solar Systems

Package:

• 6-Lead (2mm × 3mm) Plastic DFN
• 8-Lead Plastic MSOP
• 8-Lead Plastic SO

• n Reduces Power Dissipation by Replacing a Power Schottky Diode
• n Wide Operating Voltage Range: 4V to 80V
• n Reverse Input Protection to - 40V
• n Low 9μA Shutdown Current
• n Low 150μA Operating Current
• n Smooth Switchover without Oscillation
• n Controls Single or Back-to-Back N-Channel MOSFETs
• n Available in 6-Pin (2mm × 3mm) DFN, 8-Lead MSOP and 8-Lead SO Packages
• n AEC-Q100 Qualified for Automotive Applications

• n Automotive Battery Protection
• n Redundant Power Supplies
• n Supply Holdup
• n Telecom Infrastructure
• n Computer Systems/Servers
• n Solar Systems

The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T A = 25°C, IN = 12V, SOURCE = IN, unless otherwise noted.

Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.

Note 2. All currents into pins are positive; all voltages are referenced to VSS unless otherwise specified.

Note 3. An internal clamp limits the OUT pin to a minimum of 100V above VSS . Driving this pin with more current than 1mA may damage the device.

Note 4. An internal clamp limits the GATE pin to a minimum of 10V above IN or 100V above V SS . Driving this pin to voltages beyond the clamp may damage the device.

(Notes 1, 2)

IN, SOURCE, SHDN

................................... -40V to 100V

OUT (Note 3) ................................................-2V to 100V

IN - OUT ..................................................-100V to 100V

IN - SOURCE .................................................-1V to 80V

GATE - SOURCE (Note 4) .........................-0.3V to +10V

12V, 20A Automotive Reverse-Battery Protection