Analog Devices Inc. LTC1550LIGN#TRPBF
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $16.40 | $16.40 |
| 15+ | $3.77 | $56.55 |
| 25+ | $3.69 | $92.25 |
| 50+ | $3.49 | $174.50 |
| 100+ | $3.08 | $308.00 |
| N+ | $0.62 | 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 | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 16-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 16-SSOP |
| ROHS |  |
The LTC1550LIGN is a precision charge pump DC-DC converter from Analog Devices, designed to generate a regulated negative output voltage from a positive input. It accepts an input from 2.7V to 5.5V and delivers up to 20mA at outputs from -1.225V to -4.8V. Operating at a fixed 900kHz switching frequency, it allows for small external components. This converter is ideal for biasing op-amps, LCD displays, and other circuits requiring a negative rail in portable and battery-powered systems.
- Precise Negative Output: Regulated output down to -4.8V ensures accurate biasing for analog circuits.
- High-Frequency Operation: 900kHz switching allows for tiny, low-profile external capacitors, saving board space.
- Wide Input Range: Operates from 2.7V to 5.5V, compatible with standard 3.3V and 5V logic supplies.
- Low Output Current Capability: Specifically designed for low-power biasing applications, minimizing quiescent current.
Negative Rail Generation for Op-Amps
Generate a precise negative supply from a positive 3.3V or 5V rail for precision analog circuits, instrumentation amplifiers, and audio applications. The low output current of 20mA is sufficient for many op-amp biasing needs.
Battery-Powered Portable Devices
In battery-operated systems (2.7V to 5.5V input), the LTC1550LIGN efficiently creates a negative bias voltage for LCD contrast control or sensor biasing, extending battery life with its 900kHz switching.
Biasing for GaAs FET Amplifiers
Provide a stable negative gate bias voltage for GaAs FET power amplifiers in RF transceivers. The regulated output ensures consistent amplifier performance across temperature and load variations.
Data Converter Negative Supplies
Supply the negative analog rail for high-performance ADCs and DACs that require dual supplies. The low-noise charge pump design minimizes interference with sensitive conversion circuits.
Industrial Sensor Conditioning
Create a bipolar supply for signal conditioning circuits in industrial sensors, enabling accurate measurement of bipolar signals from a single positive supply rail.
- Q: What type of converter is the LTC1550LIGN?
- A: It is a charge pump (inverting) DC-DC converter, ideal for generating negative supply rails.
- 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 can be set from -1.225V down to -4.8V.
- Q: What is the maximum output current?
- A: The maximum output current is 20mA.
- Q: What is the switching frequency?
- A: It operates at a fixed 900kHz switching frequency.
- Q: What package is available?
- A: It comes in a 16-pin SSOP package (3.90mm width).
LTC1550LIGN#TRPBF.pdf
- Q: What type of converter is the LTC1550LIGN?
- A: It is a charge pump (inverting) DC-DC converter, ideal for generating negative supply rails.
- 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 can be set from -1.225V down to -4.8V.
- Q: What is the maximum output current?
- A: The maximum output current is 20mA.
- Q: What is the switching frequency?
- A: It operates at a fixed 900kHz switching frequency.
- Q: What package is available?
- A: It comes in a 16-pin SSOP package (3.90mm width).
