Overview
The LTM4657IY#PBF, manufactured by Analog Devices Inc., is a highly integrated 8A step-down switching mode μModule (micromodule) regulator. This device is packaged in a compact 6.25mm × 6.25mm × 3.87mm BGA package, making it ideal for space-constrained applications. The LTM4657 includes the switching controller, power FETs, inductor, and support components, providing a complete solution for DC/DC power conversion. 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
| Specification | Value |
|---|---|
| Input Voltage Range | 3.1V to 20V |
| Output Voltage Range | 0.5V to 5.5V |
| Output Current | Up to 8A |
| Switching Frequency | 500kHz (default) |
| Package Type | 6.25mm × 6.25mm × 3.87mm BGA |
| Operating Temperature Range | -40°C to 125°C |
| Quiescent Current | 70 mA |
| Output Voltage Error | ±1.5% Maximum Total DC Output Voltage Error Over Line, Load and Temperature |
Key Features
- High efficiency design delivering up to 8A continuous output current.
- Current mode control with fast transient response to line and load changes.
- Selectable discontinuous mode operation and output voltage tracking for supply rail sequencing.
- External frequency synchronization and multiphase parallel current sharing with multiple LTM4657s.
- Power Good indicator and fault protection features including overvoltage, overcurrent, and overtemperature protection.
- Differential remote sensing amplifier for precise output voltage regulation.
Applications
The LTM4657IY#PBF is suitable for a variety of applications requiring high current and compact form factor, such as:
- Point of Load (PoL) power supplies in data centers, cloud computing, and telecommunications equipment.
- High-performance computing and storage systems.
- Medical devices and diagnostic equipment.
- Aerospace and defense systems.
- Industrial control and automation systems.
Q & A
- What is the input voltage range of the LTM4657IY#PBF?
The input voltage range is from 3.1V to 20V.
- What is the maximum output current of the LTM4657IY#PBF?
The maximum output current is up to 8A.
- What is the default switching frequency of the LTM4657IY#PBF?
The default switching frequency is 500kHz.
- Does the LTM4657IY#PBF support external frequency synchronization?
Yes, it supports external frequency synchronization within ±30% of the set frequency.
- What type of package does the LTM4657IY#PBF come in?
The device is packaged in a 6.25mm × 6.25mm × 3.87mm BGA package.
- What are the operating temperature ranges for the LTM4657IY#PBF?
The operating temperature range is from -40°C to 125°C.
- Does the LTM4657IY#PBF have built-in fault protection features?
Yes, it includes overvoltage, overcurrent, and overtemperature protection.
- Can the LTM4657IY#PBF be used in multiphase configurations?
Yes, it supports multiphase parallel current sharing with multiple LTM4657s.
- How is the output voltage set on the LTM4657IY#PBF?
The output voltage is set via a single external resistor.
- Does the LTM4657IY#PBF have a Power Good indicator?
Yes, it includes a Power Good indicator.
