The LM2698 SIMPLE SWITCHER® 1.35A Boost Regulator is a switching power supply chip produced by National Semiconductor. It has a rated output current of 1.9A, a working voltage range of 2.2V-17V, and an input voltage range of 2.2V-12V. It has good line and load regulation, and is suitable for 3.3V-5V, 5V-12V voltage conversion applications.
The LM2698 is a general‑purpose PWM boost converter that operates from 2.2 V to 12 V input and can deliver up to 1.35 A output current. It features a pin‑selectable switching frequency (600 kHz or 1.25 MHz), a shutdown pin for low quiescent current, and an external compensation pin for flexible frequency control.
The device is supplied in a low‑profile 8‑lead MSOP package (MUA08A) and includes detailed electrical characteristics, absolute maximum ratings, and typical performance graphs for efficiency, switching frequency, and thermal resistance.
| Input Voltage Range | 2.2 V to 12 V |
|---|---|
| Maximum Switch Current | 1.9 A |
| Package | 8‑lead MSOP (MUA08A) |
| Quiescent Current (FB pin, no switching) | 0.5 nA |
| Shutdown Pin Current | 0.01 pA to 0.1 pA |
The LM2698 operates with an input voltage from 2.2 V up to 12 V.
It is supplied in an 8‑lead plastic MSOP package (MUA08A).
The SHDN pin provides a shutdown control input; when active low it suspends the device and reduces quiescent current.