Overview
The LTM4651EY#PBF, produced by Analog Devices Inc., is an ultralow noise, 58V, 24W DC/DC μModule inverting topology regulator. This device is designed to regulate a negative output voltage (VOUT–) from a positive input supply voltage (VIN), making it suitable for a variety of applications requiring high efficiency and low noise. The LTM4651 is packaged in a 15mm × 9mm × 5.01mm BGA package with either SnPb or RoHS compliant terminal finish, ensuring compliance with environmental standards.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage Range | 3.6V to 58V |
| Output Voltage Range | –26.5V to –0.5V |
| Output Current Capability | Up to 4A (2.25A at –24VOUT) |
| Output Power | 24W (from 12VIN to –24VOUT) |
| Switching Frequency Range | 250kHz to 3MHz (400kHz default) |
| Package Type | 15mm × 9mm × 5.01mm BGA |
| Operating Temperature Range | –40°C to 125°C |
| EMI Compliance | EN55022 Class B Compliant |
| Total DC Output Voltage Error | ±1.67% over line, load, and temperature (–40°C to 125°C) |
Key Features
- Ultralow noise operation
- Constant-frequency current mode control
- Frequency synchronization range: 250kHz to 3MHz
- Power Good Indicator and programmable soft-start
- Overcurrent, overvoltage, and overtemperature protection
- Parallel and current share capability with multiple LTM4651s
- No level shift circuitry needed for RUN, PGOOD, or CLKIN pins
- Compliant with EN55022 Class B radiated emissions requirements
Applications
- Avionics
- Industrial Control and Test Equipment
- Video, Imaging, and Instrumentation
- 48V Telecom and Network Power Supplies
- RF Systems
Q & A
- What is the input voltage range of the LTM4651?
The input voltage range of the LTM4651 is from 3.6V to 58V.
- What is the output voltage range of the LTM4651?
The output voltage range of the LTM4651 is from –26.5V to –0.5V.
- What is the maximum output current capability of the LTM4651?
The LTM4651 can provide up to 4A of output current, with 2.25A at –24VOUT.
- Is the LTM4651 compliant with any EMI standards?
Yes, the LTM4651 is compliant with EN55022 Class B radiated emissions requirements.
- What is the switching frequency range of the LTM4651?
The switching frequency range of the LTM4651 is from 250kHz to 3MHz, with a default frequency of 400kHz.
- Can the LTM4651 be synchronized to an external clock?
Yes, the LTM4651 can synchronize to an external clock within its frequency range.
- What kind of protection features does the LTM4651 have?
The LTM4651 includes overcurrent, overvoltage, and overtemperature protection.
- Can multiple LTM4651s be used in parallel?
Yes, multiple LTM4651s can be used in parallel and can share current.
- What is the operating temperature range of the LTM4651?
The operating temperature range of the LTM4651 is from –40°C to 125°C.
- What type of package does the LTM4651 come in?
The LTM4651 comes in a 15mm × 9mm × 5.01mm BGA package.
