Analog Devices Inc. LTC1550LCGN#PBF
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $16.00 | $16.00 |
| 15+ | $3.64 | $54.60 |
| 25+ | $3.56 | $89.00 |
| 50+ | $3.37 | $168.50 |
| 100+ | $2.97 | $297.00 |
| N+ | $0.59 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Analog Devices Inc. |
| Product Series | |
| Packaging | Tube | |
| 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 Linear Technology is a charge pump DC-DC converter designed to generate a negative output voltage from a positive input. Operating from 2.7V to 5.5V, it produces an adjustable output from -1.225V to -4.8V with up to 20mA of current. Switching at 900kHz, it requires only small external capacitors, making it ideal for space-constrained applications. The 16-SSOP package is suitable for portable electronics needing a negative rail for analog circuits.
- Negative Output Generation: Creates a negative rail from a positive supply without a transformer or inductor.
- Adjustable Output (-1.225V to -4.8V): Flexible for various analog and display biasing needs.
- 900kHz Switching: Enables small external capacitors, reducing board space.
- Low 20mA Current: Sufficient for op-amps, references, and LCD bias circuits.
- Wide Input Range (2.7V-5.5V): Compatible with Li-Ion and USB power sources.
Negative Rail Generation
The LTC1550LCGN generates a negative supply from a positive input, essential for op-amps and analog circuits that require dual supplies in portable instruments.
Bias for LCD Displays
Many LCD panels need a negative bias voltage. This charge pump provides a stable -1.225V to -4.8V output, adjustable to match display requirements.
Sensor Conditioning
For pressure or temperature sensors with differential outputs, a negative rail improves dynamic range and accuracy in signal conditioning circuits.
Audio Equipment
Portable audio codecs and amplifiers often need a negative supply for headphone drivers. The LTC1550LCGN delivers a clean, low-noise negative rail.
Data Converters
High-resolution ADCs and DACs sometimes require a negative reference voltage. This charge pump provides a precise negative output for reference circuits.
Battery-Powered Devices
With 2.7V to 5.5V input, it operates from a single Li-Ion cell, generating a negative rail without a bulky inductor, saving space in compact designs.
- Q: What type of converter is the LTC1550LCGN?
- A: It is a Charge Pump (inverting) DC-DC converter.
- Q: What is the input voltage range?
- A: The input voltage range is 2.7V to 5.5V.
- Q: What is the output voltage range?
- A: The output is negative, ranging 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 comes in a 16-SSOP package.
LTC1550LCGN#PBF.pdf
- Q: What type of converter is the LTC1550LCGN?
- A: It is a Charge Pump (inverting) DC-DC converter.
- Q: What is the input voltage range?
- A: The input voltage range is 2.7V to 5.5V.
- Q: What is the output voltage range?
- A: The output is negative, ranging 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 comes in a 16-SSOP package.
