Analog Devices Inc. LTC1550LCS8-2.5#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) | 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-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SO |
| ROHS |  |
The LTC1550LCS8-2.5 is a specialized charge pump inverter from Analog Devices, designed to produce a precise -2.5V output from a positive 3.05V to 5.25V input. With a 20mA output capability and a 900kHz switching frequency, it offers a compact, inductorless solution for generating negative supply rails. Its small 8-SOIC package is ideal for space-limited designs requiring a bipolar power supply.
- Precise Negative Voltage: Generates a stable -2.5V rail, essential for biasing analog and RF circuits.
- Inductorless Design: Uses only capacitors, reducing component count and avoiding EMI from magnetic components.
- High Switching Frequency (900kHz): Allows for small surface-mount capacitors, minimizing board space.
- Wide Positive Input Range: Operates from standard 3.3V or 5V logic supplies, simplifying system integration.
Biasing GaAs FET Amplifiers
In RF communication systems, this charge pump provides the necessary negative gate bias voltage (-2.5V) for Gallium Arsenide (GaAs) field-effect transistors, ensuring proper amplifier operation and linearity.
Op-Amp Negative Supply
For single-supply op-amp circuits that need a negative rail, the LTC1550LCS8-2.5 generates a clean -2.5V from a positive 3.3V or 5V supply, enabling true bipolar operation for improved dynamic range in signal conditioning.
LCD Contrast Adjustment
Many LCD displays require a negative voltage for contrast control. This converter can provide a stable -2.5V bias, ensuring consistent display quality in portable instruments and meters.
Sensor Excitation
Certain precision sensors and bridges require a negative excitation voltage. This charge pump offers a compact, efficient way to generate that rail from a standard positive supply in industrial or medical sensing equipment.
Audio Preamplifier Biasing
In high-fidelity audio equipment, a negative supply rail helps maintain a large signal swing and low distortion. This device can power the negative rail of a preamplifier stage from a single positive supply.
- Q: What type of converter is the LTC1550LCS8-2.5?
- A: It is a charge pump DC-DC converter that generates a negative -2.5V output.
- Q: What is the input voltage range?
- A: The input voltage range is from 3.05V to 5.25V.
- 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-SOIC package (0.154", 3.90mm Width).
- Q: Can it be used to generate a positive voltage?
- A: No, this specific model is designed to produce a negative -2.5V rail.
LTC1550LCS8-2.5#TRPBF.pdf
- Q: What type of converter is the LTC1550LCS8-2.5?
- A: It is a charge pump DC-DC converter that generates a negative -2.5V output.
- Q: What is the input voltage range?
- A: The input voltage range is from 3.05V to 5.25V.
- 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-SOIC package (0.154", 3.90mm Width).
- Q: Can it be used to generate a positive voltage?
- A: No, this specific model is designed to produce a negative -2.5V rail.
