IR3847MTR1PBF

Product Overview

• Category: Power Management IC
• Use: Voltage Regulator
• Characteristics: High efficiency, compact size, low power consumption
• Package: 40-Lead QFN
• Essence: Integrated voltage regulator for power management applications
• Packaging/Quantity: Tape and Reel, 250 units per reel

Specifications

• Input Voltage Range: 4.5V to 16V
• Output Voltage Range: 0.6V to 5.5V
• Output Current: Up to 25A
• Switching Frequency: 300kHz to 1MHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The IR3847MTR1PBF has a 40-lead QFN package with the following pin configuration:

1. VIN: Input voltage
2. PGND: Power ground
3. BOOT: Bootstrap capacitor connection
4. PHASE: Switching node connection
5. VDRV: Gate driver supply voltage
6. LGATE: Low-side gate driver output
7. UGATE: High-side gate driver output
8. COMP: Compensation pin for loop stability
9. SS/TRK: Soft-start/tracking control
10. FB: Feedback voltage input
11. VSENSE: Current sense input
12. VREF: Reference voltage output
13. AGND: Analog ground
14. EN: Enable pin
15. RT: Timing resistor connection
16. CT: Timing capacitor connection
17. OCSET: Overcurrent protection threshold setting
18. SS/TRK: Soft-start/tracking control
19. VCC: Supply voltage
20. PGND: Power ground

Functional Features

• Integrated high-efficiency synchronous buck regulator
• Adaptive voltage positioning for improved transient response
• Programmable soft-start and tracking control
• Overcurrent protection with adjustable threshold
• Voltage feed-forward compensation for stability
• Precision reference voltage output for external use
• Enable pin for power management control

Advantages and Disadvantages

Advantages

• High efficiency results in reduced power consumption
• Compact size allows for space-saving designs
• Wide input and output voltage ranges provide flexibility
• Adjustable overcurrent protection threshold enhances system safety
• Adaptive voltage positioning improves transient response

Disadvantages

• Limited output current compared to some other models
• Higher cost compared to non-integrated solutions

Working Principles

The IR3847MTR1PBF is a voltage regulator that utilizes a synchronous buck converter topology. It takes an input voltage within the range of 4.5V to 16V and converts it to a regulated output voltage between 0.6V and 5.5V. The integrated circuit incorporates high-efficiency power MOSFETs, gate drivers, and control circuitry to achieve efficient power conversion.

The device operates by switching the power MOSFETs on and off at a high frequency, typically between 300kHz and 1MHz. This switching action controls the energy transfer from the input to the output, allowing for voltage regulation. The feedback loop continuously monitors the output voltage and adjusts the duty cycle of the switches to maintain the desired output voltage.

Detailed Application Field Plans

The IR3847MTR1PBF is suitable for various power management applications, including but not limited to:

1. Servers and data centers
2. Telecommunications equipment
3. Industrial automation systems
4. Gaming consoles and graphics cards
5. Automotive electronics
6. LED lighting systems
7. Portable electronic devices

Detailed and Complete Alternative Models

1. IR3846MTR1PBF: Similar to IR3847MTR1PBF but with a lower output current rating of 20A.
2. IR3899MTRPBF: Higher power variant with an output current rating of up to 40A.
3. IR3810MTRPBF: Lower power variant with an output current rating of up to 10A.

These alternative models offer different output current capabilities to suit specific application requirements while maintaining similar features and characteristics to the IR3847MTR1PBF.

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