Analog Devices Inc. LTC1550LCMS8#PBF
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $7.72 | $7.72 |
| 15+ | $7.48 | $112.20 |
| 25+ | $7.32 | $183.00 |
| 50+ | $6.91 | $345.50 |
| 100+ | $6.10 | $610.00 |
| N+ | $1.22 | 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 | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Supplier Device Package | 8-MSOP |
| ROHS |  |
The LTC1550LCMS8 is a low-noise, inverting charge pump DC-DC converter from Analog Devices. It operates from a 2.7V to 5.5V input and produces a regulated negative output from -1.225V to -4.8V, with a maximum output current of 20mA. Its 900kHz switching frequency allows for small external capacitors, making it an ideal solution for generating negative rails in space-constrained, battery-powered applications. The 8-MSOP package is compact and suitable for portable devices.
- Low Noise Operation: Provides a clean negative rail, critical for sensitive analog and audio circuits.
- No Inductor Required: Uses only capacitors, reducing EMI and simplifying the design.
- Small Footprint: The 8-MSOP package and minimal external components save significant board space.
- Wide Input Range (2.7V-5.5V): Compatible with standard 3.3V and 5V logic supplies.
Negative Rail Generation for Op-Amps
The LTC1550LCMS8 generates a negative supply rail from a positive input, ideal for powering operational amplifiers in single-supply systems. This enables the use of dual-supply op-amps in battery-powered devices.
Bias Supplies for LCD Displays
Many LCD displays require a negative bias voltage for proper contrast. This charge pump provides a simple, low-noise solution to generate that negative rail from a 3V or 5V supply.
Portable Instrumentation
In handheld multimeters and sensors, the LTC1550LCMS8 can create a negative reference voltage for analog-to-digital converters (ADCs), improving measurement accuracy.
Audio Equipment
For portable audio devices, a negative supply is often needed for headphone amplifiers. This charge pump offers a compact, efficient way to generate that rail without a bulky inductor.
Battery-Powered Medical Monitors
In low-power medical devices, the LTC1550LCMS8 provides a reliable negative supply for biosignal amplifiers, ensuring accurate readings from ECG or EEG sensors.
- Q: What type of converter is the LTC1550LCMS8?
- A: It is a charge pump DC-DC converter, specifically an inverting charge pump.
- 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 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 is available in an 8-TSSOP/MSOP package.
LTC1550LCMS8#PBF.pdf
- Q: What type of converter is the LTC1550LCMS8?
- A: It is a charge pump DC-DC converter, specifically an inverting charge pump.
- 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 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 is available in an 8-TSSOP/MSOP package.
