LT1931IS5 is a DC-DC converter produced by Analog Devices

• High-Speed Switching: Fixed switching frequency of 1.2MHz enables use of small, low-cost capacitors and inductors with height ≤2mm.
• Negative Output Generation: Can produce -5V output at 350mA or -12V output at 150mA from 5V input.
• Dual-Inductor Topology: Filters both input-side and output-side currents, achieving ≈1mV(P-P) ripple with ceramic capacitors.
• Fixed-Frequency Switching: Ensures clean output without low-frequency noise typical in charge-pump solutions.
• Wide Input Range: 2.6V to 16V input voltage range with 36V switch allowing 34V differential between V_IN and V_OUT.
• Low-Impedance Output: Maintains within 1% of nominal value during large load steps.
• Current-Mode Control: Constant-frequency scheme provides excellent voltage/load regulation with 1.2A current limit.
• Compact Design: 5-pin ThinSOT package for space-constrained applications.

• Disk Drive MR Head Bias
• Digital Camera CCD Bias
• LCD Bias
• GaAs FET Bias
• Local Low-Noise/Low-Impedance Negative Supply