The UTC L2800 is a single-channel switching regulator control IC for low voltage applications incorporating a soft start function and short circuit detection function.
The UTC L2800 is a linear integrated circuit that provides switching regulator control for low‑voltage devices such as battery‑operated electronics. It includes a soft‑start circuit, timer‑latch short‑circuit detection, a totem‑pole output, and a standby mode with low current consumption.
The device operates from 1.8 V to 15 V, supports up to 1 MHz switching frequency, and offers output source/sink currents up to ±50 mA. Its functional blocks include a temperature‑compensated reference, a sawtooth wave oscillator, an error amplifier, a PWM comparator, and a protective short‑circuit circuit.
| Supply Voltage Range | 1.8 V – 15 V |
|---|---|
| Low Current Consumption | Typical 5.5 mA in operation |
| Maximum Switching Frequency | 1 MHz |
| Output Source Current | -50 mA (max) |
The device operates from 1.8 V up to 15 V.
At power‑on, the capacitor Cre on the SCP pin charges, and the PWM comparator uses this voltage to control the ON duty until the soft‑start period is complete.