LTC4355CMS#PBF

Product Overview

Category: Integrated Circuits (ICs)

Use: Power Management IC

Characteristics: - Ideal diode controller - Low quiescent current - Wide input voltage range - Overvoltage protection - Reverse current blocking - Adjustable undervoltage lockout - Fault flag output - Small package size

Package: 10-MSOP (0.118", 3.00mm Width)

Essence: The LTC4355CMS#PBF is an integrated circuit that functions as an ideal diode controller. It provides a low quiescent current solution for power management applications.

Packaging/Quantity: The LTC4355CMS#PBF is available in a 10-MSOP package and is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4V to 80V
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to 85°C
• Fault Flag Threshold: 1.2V
• Reverse Current: 20mA
• Overvoltage Protection Threshold: 100mV

Pin Configuration

The LTC4355CMS#PBF has the following pin configuration:

```

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| | --| EN/UVLO 1 |-- --| GATE 2 |-- --| VIN 3 |-- --| FLT 4 |-- --| GND 5 |-- --| GND 6 |-- --| GND 7 |-- --| GND 8 |-- --| VOUT 9 |-- --| VOUT 10 |-- |___________| ```

Functional Features

1. Ideal Diode Controller: The LTC4355CMS#PBF acts as an ideal diode, allowing current flow in one direction while blocking reverse current.
2. Low Quiescent Current: With a quiescent current of only 50µA, the LTC4355CMS#PBF minimizes power consumption.
3. Wide Input Voltage Range: It can handle input voltages ranging from 4V to 80V, making it suitable for various applications.
4. Overvoltage Protection: The LTC4355CMS#PBF provides overvoltage protection by limiting the output voltage to a safe level.
5. Adjustable Undervoltage Lockout: The undervoltage lockout threshold can be adjusted to suit specific requirements.
6. Fault Flag Output: A fault flag output pin indicates when a fault condition occurs.
7. Small Package Size: The 10-MSOP package offers a compact form factor, saving board space.

Advantages and Disadvantages

Advantages: - Efficient ideal diode functionality - Low power consumption - Wide input voltage range - Overvoltage protection - Adjustable undervoltage lockout

Disadvantages: - Limited to a maximum reverse current of 20mA - Requires external components for complete power management solution

Working Principles

The LTC4355CMS#PBF works by controlling the gate voltage of an external N-channel MOSFET to emulate an ideal diode. When the input voltage is higher than the output voltage, the MOSFET is turned on, allowing current flow. In the reverse direction, the MOSFET is turned off, blocking any reverse current. The device also incorporates overvoltage protection and adjustable undervoltage lockout features to ensure safe operation.

Detailed Application Field Plans

The LTC4355CMS#PBF is commonly used in various power management applications, including:

1. Battery charging systems
2. Solar power systems
3. Uninterruptible Power Supplies (UPS)
4. Automotive electronics
5. Industrial control systems

Detailed and Complete Alternative Models

1. LTC4355IMS#PBF: Similar to LTC4355CMS#PBF, but in an 8-MSOP package.
2. LTC4355HMS#PBF: High temperature version of LTC4355CMS#PBF, suitable for harsh environments.
3. LTC4355CMS#TRPBF: Tape and reel packaging option for automated assembly.

These alternative models offer similar functionality with slight variations in package size or operating conditions.

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