LN8105 Datasheet | natlinear

Description LN8105 consists of step-down switching regulator with PWM control. These devices include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc. LN8105 provides low-ripple power, high efficiency,and excellent transient characteristics. The PWM control circuit is able to very the duty ratio linearly from 0 up to 100%. This converter also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup. An enable function,an over current protect function and a short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be reduced from 300KHz to 60KHz. Also, an internal pensation block is built in to minimum external ponent count. With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators. They serve as ideal power supply units for portable devices when coupled with the SOP-8 mini-package, providing such outstanding features as low current consumption. Since this converter can acmodate an input voltage up to 23V, it is also suitable for the operation via an AC adapter. - Features - Input voltage: 4.2V to 23V. - Output voltage: 0.8V to VIN. - Duty ratio: 0% to 100% PWM control - Oscillation frequency: 300KHz typ. - Soft-start, Current limit, Enable function - Thermal Shutdown function - Built-in internal P-channel MOS - SOP-8 Package. - Applications - PC Motherboard - LCD Monitor - Graphic Card - DVD-Video Player - Tele Equipment - ADSL Modem - Printer and other Peripheral Equipment - Microprocessor core supply - Networking power supply - Package - SOP-8 FB 1 EN 2 OCSET 3 VIN 4 8 GND 8 GND 7 GND 7 GND 6 SW 6 SW 5 SW 5 SW SOP-8 (Top View) - Ordering Information LN8105 ①②③ Designator ① ② Symbol M P Description Oscillation Frequency 300KHz Package Types: SOP-8 Designator ③ Symbol S R Description Embossed Tape :Standard Feed...