Orient-chip OCP2030 free download

File name OCP2020.pdf

OCP2020 Switching Buck Regulator General Description The OCP2020 is a buck topology of switching regulator for wide operating voltage applications field. The OCP2020 includes a high current P-MOSFET, high precision reference (0.5V) for comparing output voltage with feedback amplifier, an internal dead-time control and oscillator for controlling the maximum duty cycle and PWM frequency, and has power-on programmable soft start time and short circuit PMOS turn-off and auto re-start protection functions. Features Precision feedback reference voltage: 0.5V (2%) Wide supply voltage operating range: 3.6 to 20V Low current consumption: 3mA Internal fixed oscillator frequency: Typ. 340KHz Programmable Soft-Start function (SS) Short Circuit Shutdown and Auto Re-start function(ARSCP) Built-in P-MOSFET for 2A loading capability Over Current Protection Package: SOP8 Pin Configuration Top View 1 2 3 4 OCP2020 8 7 6 5 Name VCC SS/SCP INFB GND LX No. 1 2 3 4 5 6 7 8 Status P I I O P O Description IC Power Supply (PMOS Source) Connecting with a Soft-start & ARSCP timing capacitor Error Amplifier Inverting Input Error Amplifier Compensation Output IC Ground PMOS High Current Output Block Diagram VCC 1 Reference Regulator 1.25V Oscillator Thermal Shuntdown IN- 3 36K 500 0.5V 0.8V Output drive control circuits FB 4 Soft start&Auto Re-start S.C.P Circuits Over Current Protection 5 GND 6 GND 2 SCP 7 LX 8 LX Page 1 - 1 Contact Information: For more detail information , please direct any inquiries and/or comments to [email protected]. Rev.1.3 Mar.17, 2008