Analog Devices Inc. LTC1550LCS8-2#TRPBF
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $12.40 | $12.40 |
| 15+ | $2.85 | $42.75 |
| 25+ | $2.79 | $69.75 |
| 50+ | $2.64 | $132.00 |
| 100+ | $2.33 | $233.00 |
| N+ | $0.47 | 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) | 2.7V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | -2V |
| 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-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SO |
| ROHS |  |
The LTC1550LCS8-2 from Analog Devices is a charge pump DC-DC converter that generates a fixed -2V output from a 2.7V to 5.5V input. Capable of delivering 20mA, it operates at a 900kHz switching frequency, allowing for very small external capacitors. It is ideal for GaAs FET biasing, LCD contrast, and negative rail generation in compact, battery-powered systems.
- Fixed -2V Output: No external resistors required, simplifying the design and ensuring accurate output voltage.
- High Switching Frequency: 900kHz operation minimizes capacitor size, enabling ultra-compact PCB layouts.
- Wide Input Compatibility: Operates from 2.7V to 5.5V, suitable for both 3.3V and 5V systems.
- Low Output Noise: Charge pump design provides a clean negative rail for sensitive analog and RF circuits.
GaAs FET Gate Bias
The LTC1550LCS8-2 provides a precise -2V bias for GaAs FETs in RF amplifiers, ensuring optimal linearity and gain in cellular and wireless transmitters.
LCD Contrast Control
Many LCD modules require a -2V rail for contrast adjustment. This charge pump delivers a fixed -2V from a 2.7V-5.5V input, simplifying display driver designs.
Negative Supply for Op-Amps
In single-supply systems, this converter generates a -2V rail for op-amps that need a negative supply for true zero-output capability or level shifting.
Battery-Powered Instruments
Portable test equipment can use the LTC1550LCS8-2 to create a negative reference voltage for analog circuits, with the 900kHz frequency enabling small external components.
Sensor Biasing
Certain photodiodes and thermopiles require a negative bias to operate in the reverse-biased mode. This converter provides a stable -2V source for such sensors.
Audio Level Shifters
Audio circuits sometimes need a negative rail for headroom optimization. The LTC1550LCS8-2 offers a compact solution for generating -2V in portable audio devices.
- Q: What type of converter is the LTC1550LCS8-2?
- A: It is a charge pump DC-DC converter that generates a fixed -2V output.
- Q: What is the input voltage range?
- A: The input voltage range is 2.7V to 5.5V.
- 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 comes in an 8-SOIC (0.154", 3.90mm Width) package.
- Q: Is the output voltage fixed?
- A: Yes, this version has a fixed -2V output.
LTC1550LCS8-2#TRPBF.pdf
- Q: What type of converter is the LTC1550LCS8-2?
- A: It is a charge pump DC-DC converter that generates a fixed -2V output.
- Q: What is the input voltage range?
- A: The input voltage range is 2.7V to 5.5V.
- 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 comes in an 8-SOIC (0.154", 3.90mm Width) package.
- Q: Is the output voltage fixed?
- A: Yes, this version has a fixed -2V output.
