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50 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The LT1931AES5TRMPBF is an inverting current mode DC/DC converter from Linear Technology, designed for high power applications in a small footprint. It operates at a fixed switching frequency of 1.2MHz (LT1931) or 2.2MHz (LT1931A), enabling the use of small surface mount components. This device supports a wide input voltage range from 2.6V to 16V and can generate negative output voltages such as -5V at 350mA or -12V at 150mA from a 5V input.
The converter utilizes a dual inductor inverting topology, filtering both input and output currents to achieve very low output voltage ripple, approaching 1mVP-P when ceramic capacitors are used. The integrated 1A switch has a low VCESAT of 400mV at 1A. The LT1931AES5TRMPBF is available in a low profile (1mm) 5-lead ThinSOT package, suitable for surface mounting.
Key applications include disk drive MR head bias, digital camera CCD bias, LCD bias, and GaAs FET bias, providing a local low noise, low impedance negative supply. It is pin-for-pin compatible with the LT1611, offering an upgrade path for higher power requirements.
The input voltage range is 2.6V to 16V.
The device is available in a SOT-23-5 Thin surface mount package.
The switching frequency is 2.2MHz (typical).
The typical feedback voltage is -1.255V.
The device can deliver up to 300mA (e.g., -5V at 300mA from 5V input).
The output ripple is 1mVP-P typical.
Yes, it is pin-compatible with the LT1611.