The LT1054IS8#TRPBF from Analog Devices is a monolithic bipolar switched-capacitor voltage converter and regulator. It uses a charge-pump architecture that requires no external inductor and can be configured as a voltage inverter, regulated converter, positive voltage doubler, or negative voltage doubler.
The device operates from a 3.5V to 15V input-voltage range and delivers up to 100mA of output current. At a 100mA load, its typical total voltage loss is 1.1V, while typical quiescent current is 2.5mA. An adaptive switch-driver architecture optimizes efficiency across a wide range of output currents.
An integrated voltage reference and error amplifier allow the device to produce a regulated output using an external resistor divider. Grounding the feedback pin places the device into shutdown, reducing supply current to less than 100μA.
The internal oscillator runs at a nominal frequency of 25kHz. The OSC pin allows switching-frequency adjustment or synchronization to an external clock. Multiple devices can be connected in parallel, and the LT1054 is pin-compatible with the LTC1044 and ICL7660.
The LT1054IS8#TRPBF is an industrial-temperature model supporting a junction-temperature range of -40°C to +100°C. It is supplied in a narrow 8-lead SOIC surface-mount package. The “#TRPBF” suffix identifies the lead-free tape-and-reel ordering option.
Key Specifications:
- Manufacturer: Analog Devices
- Manufacturer Part Number: LT1054IS8#TRPBF
- Device Type: Switched-Capacitor Voltage Converter and Regulator
- Converter Architecture: Charge Pump
- Input-Voltage Range: 3.5V to 15V
- Absolute Maximum Supply Voltage: 16V
- Maximum Output Current: 100mA
- Typical Voltage Loss: 1.1V at 100mA
- Typical Quiescent Current: 2.5mA
- Nominal Oscillator Frequency: 25kHz
- Nominal Internal Reference: 2.5V
- Shutdown Supply Current: Less Than 100μA
- Supported Functions: Inverting, Regulating and Voltage Doubling
- External Synchronization: Supported
- Parallel Operation: Supported
- Pin Compatibility: LTC1044 and ICL7660
- Junction-Temperature Range: -40°C to +100°C
- Package: Narrow 8-Lead SOIC
- Mounting Type: Surface Mount
- Packaging: Lead-Free Tape and Reel
Typical Applications:
Suitable for negative supply generation, auxiliary analog power rails, voltage inversion, regulated charge-pump supplies, positive and negative voltage doubling, instrumentation, and other low-power conversion circuits where an inductor-free design is preferred. Capacitor ESR, output ripple, load current, thermal performance, and input-to-output voltage conditions should be evaluated in the final design.
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