LTC4221CGN#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management and Control
• Characteristics: High Voltage Ideal Diode Controller
• Package: 16-Lead SSOP
• Essence: Provides an ideal diode function for power management applications
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.8V to 18V
• Operating Temperature Range: -40°C to 85°C
• Quiescent Current: 20µA
• Reverse Leakage Current: 10nA
• Voltage Drop: 50mV at 1A
• Fault Output Voltage: 5V
• Power Supply Rejection Ratio: 60dB
• Output Current Limit: 4A

Detailed Pin Configuration

The LTC4221CGN#TRPBF has a 16-lead SSOP package with the following pin configuration:

1. GATE1: Gate Drive Output for Channel 1
2. SOURCE1: Source Connection for Channel 1
3. GND: Ground
4. VCC: Positive Power Supply
5. GATE2: Gate Drive Output for Channel 2
6. SOURCE2: Source Connection for Channel 2
7. FLT1: Fault Output for Channel 1
8. FLT2: Fault Output for Channel 2
9. SENSE1: Sense Input for Channel 1
10. SENSE2: Sense Input for Channel 2
11. REF: Reference Voltage Output
12. FB: Feedback Input
13. VEE: Negative Power Supply
14. NC: No Connection
15. NC: No Connection
16. NC: No Connection

Functional Features

• Provides an ideal diode function for power management applications
• Controls external N-channel MOSFETs to emulate ideal diodes
• Enables low-loss power ORing and supply holdup applications
• Allows hot-swapping of power sources
• Provides reverse current protection
• Offers adjustable current limit and fault response time

Advantages and Disadvantages

Advantages

• Low voltage drop (50mV at 1A) minimizes power loss
• Wide input voltage range (2.8V to 18V) allows versatile applications
• Adjustable current limit provides flexibility in different scenarios
• Fault output signals enable system monitoring and protection
• High power supply rejection ratio ensures stable operation

Disadvantages

• Limited to two channels, may not be suitable for applications requiring more channels
• Requires external N-channel MOSFETs for operation, increasing component count

Working Principles

The LTC4221CGN#TRPBF is designed to provide an ideal diode function by controlling external N-channel MOSFETs. It emulates the behavior of a diode while offering additional features such as adjustable current limit and fault detection.

When both input sources are present, the LTC4221CGN#TRPBF turns on the MOSFETs to create a low-resistance path for current flow. If one source fails or its voltage drops below a certain threshold, the corresponding MOSFET is turned off, preventing reverse current flow and protecting the system.

The device continuously monitors the input sources and adjusts the gate drive to maintain a low voltage drop across the MOSFETs, minimizing power loss. The fault outputs provide signals to the system controller for fault detection and appropriate actions.

Detailed Application Field Plans

The LTC4221CGN#TRPBF finds applications in various power management scenarios, including:

1. Power ORing: It enables the connection of multiple power sources in parallel, providing redundancy and load sharing capabilities.
2. Supply Holdup: The device ensures uninterrupted power supply during input source transitions or failures, preventing system downtime.
3. Hot-Swapping: It allows for safe insertion and removal of power sources while the system is operational, avoiding disruptions.
4. Battery Backup Systems: The LTC4221CGN#TRPBF can be used to switch between a primary power source and a backup battery, ensuring continuous operation during power outages.

Detailed and Complete Alternative Models

• LTC4357: Ideal Diode Controller with Reverse Input Protection
• LTC4412: Dual Low Loss PowerPath Controller
• LTC4370: High Voltage Surge Stopper with Ideal Diode
• LTC4366: Overvoltage and Reverse Supply Protection Controller

These alternative models offer similar functionality and can be considered based on specific application requirements.

Word count: 513 words