Analog Devices Inc. LTC1550LCS8#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 | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.7V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | -1.225V |
| Voltage - Output (Max) | -4.8V |
| 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 is an adjustable charge pump inverter from Analog Devices, capable of generating a negative output from -1.225V to -4.8V. It accepts a wide input voltage from 2.7V to 5.5V and delivers up to 20mA. Operating at a 900kHz switching frequency, it allows for small external capacitors. This flexibility makes it a practical solution for creating negative supply rails in a variety of low-power applications.
- Adjustable Output (-1.225V to -4.8V): Offers design flexibility to meet specific negative voltage requirements.
- Wide Input Range (2.7V-5.5V): Compatible with multiple power sources, including single-cell batteries.
- High-Frequency Operation (900kHz): Enables the use of small, low-cost ceramic capacitors.
- Inductorless Charge Pump: Reduces EMI and simplifies the overall power supply design.
Adjustable Negative Bias Supply
The LTC1550LCS8's adjustable output (-1.225V to -4.8V) makes it highly versatile for setting precise negative bias voltages in various analog circuits, from simple op-amp rails to specialized sensor biasing.
Portable Battery-Powered Gear
With a low 2.7V minimum input, this charge pump can generate a negative rail from a single lithium-ion cell, enabling bipolar operation in compact, battery-powered audio devices or portable instruments.
LCD Display Contrast Control
By adjusting the external resistor divider, designers can set the optimal negative voltage for LCD contrast, ensuring clear visibility across different temperature ranges and viewing angles.
RF Switch and Attenuator Biasing
In RF front-ends, PIN diodes and GaAs switches often require negative control voltages. This adjustable inverter provides the flexibility to match the specific bias requirements of different RF components.
Industrial Process Control
For transducers and signal conditioners that need a negative reference, this converter offers a compact way to derive it from a positive supply rail, simplifying power supply design in industrial control loops.
- Q: What type of converter is the LTC1550LCS8?
- A: It is a charge pump DC-DC converter designed to generate a negative output voltage.
- Q: What is the input voltage range?
- A: The input voltage range is from 2.7V to 5.5V.
- Q: What is the output voltage range?
- A: The output voltage is adjustable from -1.225V to -4.8V.
- 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).
LTC1550LCS8#TRPBF.pdf
- Q: What type of converter is the LTC1550LCS8?
- A: It is a charge pump DC-DC converter designed to generate a negative output voltage.
- Q: What is the input voltage range?
- A: The input voltage range is from 2.7V to 5.5V.
- Q: What is the output voltage range?
- A: The output voltage is adjustable from -1.225V to -4.8V.
- 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).
