Overview
The LTM4644IY#PBF is a quad DC/DC step-down µModule regulator produced by Analog Devices Inc. This device features four independent output channels, each capable of delivering up to 4A of continuous current and 5A of peak current. The outputs can be paralleled to achieve a combined output current of up to 16A. The regulator includes switching controllers, power FETs, inductors, and support components, making it a comprehensive power management solution. It operates over an input voltage range of 4V to 14V or 2.375V to 14V with an external bias supply and supports an output voltage range of 0.6V to 5.5V. The high-efficiency design and compact BGA package make it suitable for space-constrained applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN | Input DC Voltage | 4 | 14 | V | |
| VOUT(RANGE) | Output Voltage Range | 0.6 | 5.5 | V | |
| IOUT | Output Current per Channel | 4A (continuous), 5A (peak) | A | ||
| VRUN | RUN Pin On Threshold | 1.1 | 1.2 | 1.3 | V |
| IQ(SVIN) | Input Supply Bias Current | 6 mA (VIN = 12V, VOUT = 1.5V, MODE = INTVCC) | mA | ||
| Temperature Range | –40°C to 125°C (LTM4644IY) | °C | |||
| Package | BGA-77 |
Key Features
- Quad Output Step-Down µModule Regulator with 4A per Output
- Wide Input Voltage Range: 4V to 14V or 2.375V to 14V with External Bias
- Output Voltage Range: 0.6V to 5.5V
- Up to 16A Combined Output Current by Paralleling Outputs
- High Efficiency Design with Synchronous Rectification
- ±1.5% Total Output Voltage Regulation
- Current Mode Control with Fast Transient Response
- Output Voltage Tracking and Margining
- Internal Temperature Sensing
- External Frequency Synchronization
- Overvoltage, Current, and Temperature Protection
- Internal Soft-Start Reduces In-Rush Current
- Output Short-Circuit Protection with Auto-Recovery
- Thermal Foldback Protection for Overtemperature
- Package-Level Thermal Monitoring (PTM)
Applications
- Multirail Point of Load Regulation
- FPGAs, DSPs, and ASICs
- Efficient Power Delivery Systems
- Customizable Voltage Output Applications
- Stable Power Conversion in Electronic Devices
- 4V to 14V Input, Quad Output Configurations (e.g., 1.2V, 1.5V, 2.5V, 3.3V)
- 2.375V to 5V Input, Quad Output Configurations (e.g., 1V, 1.2V, 1.5V, 1.8V)
- 4-Phase Designs with Temperature Monitoring
- Separate Input Rails for Different Output Voltages (e.g., 12V and 5V inputs for 1.2V and 3.3V outputs)
Q & A
- What is the input voltage range of the LTM4644IY#PBF?
The input voltage range is 4V to 14V or 2.375V to 14V with an external bias supply.
- What is the output voltage range of the LTM4644IY#PBF?
The output voltage range is 0.6V to 5.5V.
- How much current can each output channel deliver?
Each output channel can deliver up to 4A continuous and 5A peak current.
- Can the outputs be paralleled for higher current?
- What type of package does the LTM4644IY#PBF use?
- What are some key protection features of the LTM4644IY#PBF?
- Does the LTM4644IY#PBF support external frequency synchronization?
- What is the operating temperature range of the LTM4644IY#PBF?
- Does the LTM4644IY#PBF have internal temperature sensing?
- What are some typical applications of the LTM4644IY#PBF?
