The LTC1148 series is a family of synchronous step-down switching regulator controllers featuring automatic Burst Mode operation to maintain high efficiencies at low output currents.
The LTC1148 series is a family of high‑efficiency synchronous step‑down switching regulator controllers featuring current‑mode operation, burst‑mode for low‑load efficiency, and a low standby current of 160 µA. The device drives external power MOSFETs and supports input voltages up to 16 V (20 V for the HV version) with efficiencies exceeding 95 %.
The document includes absolute maximum ratings, electrical characteristics, typical performance graphs, functional diagrams, and application guidance. Package options are a 14‑lead narrow‑body PDIP and a 14‑lead narrow‑body plastic small‑outline (SO) package. Related parts and reference designs are also listed.
| Efficiency | Over 95 % |
|---|---|
| Continuous Output Current (Pins 1, 14) | 0 … 50 mA |
| Operating Ambient Temperature Range | 0 °C to 70 °C |
| Standby Current (Sleep Mode) | 160 µA |
| Package (PDIP) | 14‑Lead PDIP (Narrow 0.300) |
| Package (SO) | 14‑Lead Plastic Small Outline (Narrow 0.150) |
The standby (sleep) current can be as low as 160 µA at light loads.
The LTC1148 series provides ultrahigh efficiency of over 95 %.