Overview
The LTM4657IY from Analog Devices Inc. is a complete 8A step-down switching mode µModule (micromodule) regulator. It is packaged in a compact 6.25mm × 6.25mm × 3.87mm BGA package, making it ideal for space-constrained applications. The module includes the switching controller, power FETs, inductor, and all necessary support components, simplifying the design process. It operates over an input voltage range of 3.1V to 20V and supports an output voltage range of 0.5V to 5.5V, adjustable via a single external resistor.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Input Voltage Range | 3.1 to 20 | V |
| Output Voltage Range | 0.5 to 5.5 | V |
| Output Current | 8 | A |
| Switching Frequency | 500 kHz | |
| Total DC Output Voltage Error | ±1.5% | |
| Operating Temperature Range | -40°C to 125°C | |
| Package Type | 49-lead BGA | |
| Package Dimensions | 6.25mm × 6.25mm × 3.87mm |
Key Features
- High efficiency design delivering up to 8A continuous output current.
- Current mode control with fast transient response to line and load changes.
- External frequency synchronization and adjustable switching frequency.
- Selectable discontinuous mode operation and output voltage tracking for supply rail sequencing.
- Differential remote sensing amplifier.
- Power good indicator.
- Fault protection features including overvoltage, overcurrent, and overtemperature protection.
- Multiphase parallel current sharing with multiple LTM4657s.
Applications
- Telecom and datacom equipment.
- Networking equipment.
- Industrial equipment.
- Medical diagnostic equipment.
- Data storage rack units and cards.
- Test and debug systems.
Q & A
- What is the input voltage range of the LTM4657IY?
The input voltage range is from 3.1V to 20V.
- What is the output voltage range of the LTM4657IY?
The output voltage range is from 0.5V to 5.5V, adjustable via a single external resistor.
- What is the maximum output current of the LTM4657IY?
The maximum output current is 8A.
- What is the switching frequency of the LTM4657IY?
The default switching frequency is 500 kHz, but it can be adjusted and externally synchronized.
- Does the LTM4657IY have fault protection features?
Yes, it includes overvoltage, overcurrent, and overtemperature protection.
- What is the operating temperature range of the LTM4657IY?
The operating temperature range is from -40°C to 125°C.
- What type of package does the LTM4657IY come in?
The LTM4657IY comes in a 49-lead BGA package.
- Can the LTM4657IY be used in multiphase configurations?
Yes, it supports multiphase parallel current sharing with multiple LTM4657s.
- Does the LTM4657IY have a power good indicator?
Yes, it includes a power good indicator.
- What are some typical applications for the LTM4657IY?
Typical applications include telecom, datacom, networking, industrial equipment, medical diagnostic equipment, and data storage rack units.
