OCP2030

OCP2030 SWITCHING BUCK REGULATOR „ General Description The OCP2030 is a buck topology of switching regulator for wide operating voltage applications field. The OCP2030 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 z Precision feedback reference voltage: 0.5V (2%) z Wide supply voltage operating range: 3.0 to 20V z Low current consumption: 5.5mA z Internal fixed oscillator frequency: Typ. 500KHz z Programmable Soft-Start function (SS) z Short Circuit Shutdown and Auto Re-start function(ARSCP) z Built-in P-MOSFET for 3A loading capability z Package: SOP8 „ Typical Application Circuit Vin + 1 VCC LX 8 LX 7 OCP2030 IN- 3 2 SCP FB GND GND 4 56 Vout + „ Pin Configuration Top View 18 27 3 OCP2030 6 45 Name VCC SS/SCP INFB GND LX No. Status 1P 2I 3I 4O 5 6 P 7 8 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 www.micro-bridge.com Page1 - 8 Rev. 1.0 Jan 09, 2007 „ Block Diagram 1 Reference Regulator 1.25V Oscillator 3 0.5V 4 36KΩ 500Ω 0.7V Soft start&Auto Re-start S.C.P Circuits OCP2030 SWITCHING BUCK ...