SiP12202 New Product Vishay Siliconix Synchronous Step Down Controller FEATURES DESCRIPTION 2.7 V to 5.5 V Input Voltage Range SiP12202 is a synchronous step down controller designed for use in dc-dc converter circuits requiring Adjustable Output Voltage - 0.6 to 5.5 V output currents as high as 10 amperes. SiP12202 is For Converter loads up to 10 A designed to require a minimum number of external High efficiency - 93% components, simplifying design and layout. It accepts Uses High Side P-Channel MOSFET input voltages from 2.7 V to 5.5 V, providing an adjust- Uses Low Side N-Channel MOSFET able output with voltage ranging from 0.6 V to 5.5 V. 500 kHz operation SiP12202 includes a combination Compensation/ Internal Soft Start Shutdown pin. Protection features include undervolt- Power Good Indication age lockout, Power Good output, output current limit, Shutdown Pin and thermal shutdown. Output Current Limit SiP12202 is available in a lead (Pb)-free MLP-33-10 Minimum External Components package and is specified to operate over the range of MLP33-10 Package - 40 C to 85 C. APPLICATIONS Distributed Power Desktop & Notebook Computers Battery Operated Equipment Point of Load Regulation DSP Cores TYPICAL APPLICATION CIRCUIT V IN V IN V IN DH LX V OUT PG Power Good DL Compensation/ COMP/SD Shutdown FB AGND PGND AGNDPGND GND Document Number: 73542 www.vishay.com S-52083Rev. A, 10-Oct-05 1SiP12202 New Product Vishay Siliconix ABSOLUTE MAXIMUM RATINGS Parameter Limit Unit V , LX to GND 6 IN V FB, P , Comp/SD to GND - 0.3 to 6 G a, b 560 mW Power Dissipation Maximum Junction Temperature 125 C Storage Temperature - 55 to + 150 Notes a. Device mounted with all leads soldered or welded to PC board b. Derate 14 mW/C above + 85 C Stresses beyond those listed underAbsolute Maximum Rating may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating/conditions for extended periods may affect device reliability. RECOMMENDED OPERATING RANGE Parameter Limit Unit Input Voltage Range 2.7 to 5.5 V Output Voltage Adjustment Range 0.6 to 5.5 Operating Temperature Range - 40 to + 85 C SPECIFICATIONS Limits Test Condition Unless Specified -40 to 85C Parameter Symbol Unit V = 5.0 IN a b a Min Typ Max Controller Input Voltage V 2.7 5.5 V IN Quiescent Current Non Switching 0.6 1 mA Switching Oscillator Frequency f kHz 400 500 600 OSC Oscillator Ramp Amplitude V V 1 OSC T = 25 C 0.591 0.600 0.609 A V Feedback Voltage V FB 0.585 0.615 FB input Bias Current I 100 nA FB Transconductance GM 2 mA/V Soft Start 4 ms Inputs and Outputs SD Input Voltage V 0.15 V IL Shutdown Current I A 30 60 IL MOSFET Drivers Break-before-make-time t ns 30 BBM Highside Driver Output Voltage V V 4.5 DH RDS V = 4.5 V 1.3 1.9 HH IN On resistance RDS V = 4.5 V 2.8 4.4 HL IN Rise time - PFET Turn On t V = 5 V, C = 2.7 nF 64 rH IN L ns Fall time - PFET Turn Off t V = 5 V, C = 2.7 nF 8 fH IN L Lowside Driver Output Voltage V V 4.5 DL RDS V = 4.5 V 5.5 8.2 LH IN On resistance RDS V = 4.5 V 0.85 1.4 LL IN Rise time - NFET Turn On t V = 5 V, C = 2.7 nF 83 rL IN L ns Fall time - NFET Turn Off t V = 5 V, C = 2.7 nF 6.6 fL IN L www.vishay.com Document Number: 73542 2 S-52083Rev. A, 10-Oct-05