LTC3646HDE#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency - Low quiescent current - Wide input voltage range - Adjustable output voltage - Small package size

Package: DFN-10

Essence: The LTC3646HDE#TRPBF is a high-efficiency, low quiescent current synchronous buck regulator. It is designed for power management applications.

Packaging/Quantity: The LTC3646HDE#TRPBF is available in a DFN-10 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Maximum Output Current: 4A
• Switching Frequency: 1MHz
• Quiescent Current: 35µA
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LTC3646HDE#TRPBF has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. SW: Switching node pin
4. FB: Feedback pin
5. EN: Enable pin
6. SS: Soft-start pin
7. PG: Power good pin
8. VOUT: Output voltage pin
9. VCC: Internal supply voltage pin
10. BST: Bootstrap capacitor pin

Functional Features

• High efficiency synchronous buck regulator
• Adjustable output voltage through external resistors
• Power good indicator for output voltage monitoring
• Soft-start feature for controlled startup
• Overcurrent and overtemperature protection

Advantages

• High efficiency results in reduced power dissipation
• Wide input voltage range allows for versatile applications
• Small package size saves board space
• Adjustable output voltage provides flexibility
• Power good indicator ensures reliable operation

Disadvantages

• Limited maximum output current (4A)
• Requires external components for operation
• Higher cost compared to non-integrated solutions

Working Principles

The LTC3646HDE#TRPBF is a synchronous buck regulator that converts a higher input voltage to a lower output voltage. It uses high-frequency switching to efficiently regulate the output voltage. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle of the internal switches to maintain the desired output voltage.

The enable pin (EN) controls the regulator's operation, allowing it to be turned on or off as needed. The soft-start pin (SS) gradually ramps up the output voltage during startup to prevent excessive inrush current. The power good pin (PG) provides an indication when the output voltage is within the specified range.

The LTC3646HDE#TRPBF also incorporates various protection features such as overcurrent and overtemperature protection to ensure safe operation.

Detailed Application Field Plans

The LTC3646HDE#TRPBF can be used in various power management applications, including but not limited to: - Portable electronic devices - Battery-powered systems - Industrial equipment - Automotive electronics - Telecommunications equipment

Its wide input voltage range, adjustable output voltage, and high efficiency make it suitable for a wide range of applications where efficient power conversion is required.

Detailed and Complete Alternative Models

1. LTC3646IDE#TRPBF: Similar to LTC3646HDE#TRPBF, but available in an SO-10 package.
2. LTC3646MPDE#TRPBF: Similar to LTC3646HDE#TRPBF, but designed for military and aerospace applications.
3. LTC3646EUDE#TRPBF: Similar to LTC3646HDE#TRPBF, but available in a QFN-10 package.

These alternative models offer similar functionality and characteristics, providing options for different package preferences or specific application requirements.

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