Analog Devices Inc. LTC1550LCMS8-2.5#TRPBF
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $13.85 | $13.85 |
| 15+ | $3.18 | $47.70 |
| 25+ | $3.11 | $77.75 |
| 50+ | $2.94 | $147.00 |
| 100+ | $2.60 | $260.00 |
| N+ | $0.52 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Analog Devices Inc. |
| Product Series | |
| Packaging | Tape & Reel (TR) | |
| Function | Step-Up/Step-Down |
| Output Configuration | Negative |
| Topology | Charge Pump |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 3.05V |
| Voltage - Input (Max) | 5.25V |
| Voltage - Output (Min/Fixed) | -2.5V |
| Voltage - Output (Max) | - |
| Current - Output | 20mA |
| Frequency - Switching | 900kHz |
| Synchronous Rectifier | No |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Supplier Device Package | 8-MSOP |
| ROHS |  |
The LTC1550L-2.5 is a charge pump DC-DC converter from Analog Devices, specifically designed to generate a fixed -2.5V output from a positive 3.05V to 5.25V input. It delivers up to 20mA of output current with a 900kHz switching frequency, allowing for small external capacitors. The device is housed in a compact 8-MSOP/TSSOP package, making it suitable for space-limited applications. This converter is ideal for generating negative bias rails in portable instruments, optical modules, and precision analog systems where a stable -2.5V supply is required.
- Fixed -2.5V Output: Eliminates the need for external resistor dividers, simplifying design and improving accuracy.
- 900kHz Switching Frequency: Allows for tiny ceramic capacitors, minimizing PCB area.
- Wide Input Range (3.05V-5.25V): Works with standard 3.3V and 5V rails, as well as Li-ion batteries.
- Low Output Current (20mA): Optimized for low-power analog bias applications, reducing unnecessary power consumption.
Fixed -2.5V Rail for Analog Circuits
The LTC1550L-2.5 provides a precise -2.5V output from a 3.3V or 5V supply, ideal for biasing operational amplifiers and analog-to-digital converters in data acquisition systems.
Portable Instrumentation
With 20mA output and 900kHz operation, this charge pump efficiently powers low-current negative rails in handheld multimeters and field transmitters.
Optical Transceiver Modules
In SFP/QSFP modules, the fixed -2.5V rail is used for laser driver bias circuits, and the compact MSOP package fits within tight module constraints.
Battery-Powered Audio Equipment
For portable audio codecs requiring a negative supply, the LTC1550L-2.5 delivers a clean -2.5V rail from a single Li-ion battery (3.0V-4.2V).
Industrial Sensor Transmitters
In 4-20mA loop-powered transmitters, this charge pump generates the negative supply needed for precision sensor amplifiers, operating from the loop's 3.3V regulator.
- Q: What type of converter is the LTC1550L-2.5?
- A: It is a Charge Pump DC-DC converter (inverting).
- Q: What is the input voltage range?
- A: The input voltage range is 3.05V to 5.25V.
- Q: What is the output voltage?
- A: The output voltage is fixed at -2.5V.
- Q: What is the maximum output current?
- A: The maximum output current is 20mA.
- Q: What is the switching frequency?
- A: The switching frequency is 900kHz.
- Q: What package is available?
- A: It is available in an 8-TSSOP or 8-MSOP package (3.00mm width).
LTC1550LCMS8-2.5#TRPBF.pdf
- Q: What type of converter is the LTC1550L-2.5?
- A: It is a Charge Pump DC-DC converter (inverting).
- Q: What is the input voltage range?
- A: The input voltage range is 3.05V to 5.25V.
- Q: What is the output voltage?
- A: The output voltage is fixed at -2.5V.
- Q: What is the maximum output current?
- A: The maximum output current is 20mA.
- Q: What is the switching frequency?
- A: The switching frequency is 900kHz.
- Q: What package is available?
- A: It is available in an 8-TSSOP or 8-MSOP package (3.00mm width).
