Analog Devices Inc. LTC1550LCGN#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 | 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 | 16-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 16-SSOP |
| ROHS |  |
The LTC1550LCGN from Analog Devices is a versatile charge pump DC-DC converter that generates an adjustable negative output voltage from -1.225V to -4.8V. It operates from a 2.7V to 5.5V input and delivers up to 20mA of output current. With a switching frequency of 900kHz, it enables the use of small external capacitors. This converter is ideal for applications requiring a customizable negative supply, such as tunable RF circuits, portable instruments, and audio equipment. The 16-SSOP package offers a compact footprint.
- Adjustable Output: Output voltage can be set from -1.225V to -4.8V, offering design flexibility.
- Wide Input Range: Accepts 2.7V to 5.5V, compatible with multiple battery configurations.
- High-Frequency Operation: 900kHz switching allows for small external components.
- Low Output Current: 20mA is sufficient for bias and reference applications.
Adjustable Negative Bias for Tunable Filters
In RF and microwave systems, tunable filters and varactor diodes require adjustable negative bias voltages. The LTC1550LCGN's output can be set from -1.225V to -4.8V via external resistors, providing flexibility for frequency tuning.
Battery-Powered Instrumentation
Portable instruments operating from a single Li-ion cell (2.7V to 4.2V) can use this charge pump to generate a negative rail for precision amplifiers, ensuring accurate measurements in field applications.
Optical Transceivers
Optical modules often need a negative supply for laser driver biasing. The LTC1550LCGN offers a compact solution with adjustable output, accommodating different laser diode requirements.
Audio Preamplifiers
High-end audio equipment uses dual supplies for low-noise preamps. This converter provides a clean negative rail, improving dynamic range and reducing distortion in audio signal chains.
Industrial Process Control
In process control loops, transmitters and signal isolators may require a bipolar supply. The LTC1550LCGN generates a stable negative voltage from a 3.3V or 5V source, enhancing system reliability.
- Q: What type of converter is the LTC1550LCGN?
- A: It is a charge pump DC-DC converter that generates 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 a 16-SSOP package with a width of 3.90mm.
LTC1550LCGN#TRPBF.pdf
- Q: What type of converter is the LTC1550LCGN?
- A: It is a charge pump DC-DC converter that generates 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 a 16-SSOP package with a width of 3.90mm.
