CS51031 Fast PCh FET Buck Controller The CS51031 is a switching controller for use in DCDC converters. It can be used in the buck topology with a minimum number of external components. The CS51031 consists of a V CC CS51031 ORDERING INFORMATION Operating Temperature Range Device Package Shipping CS51031YD8 SOIC8 98 Units / Rail CS51031YD8G SOIC8 98 Units / Rail (PbFree) 40C < T < 85C A CS51031YDR8 SOIC8 2500 / Tape & Reel CS51031YDR8G SOIC8 2500 / Tape & Reel (PbFree) CS51031GD8 SOIC8 98 Units / Rail CS51031GD8G SOIC8 98 Units / Rail (PbFree) 0C < T < 70C A CS51031GDR8 SOIC8 2500 / Tape & Reel CS51031GDR8G SOIC8 2500 / Tape & Reel (PbFree) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. MAXIMUM RATINGS Rating Value Unit Power Supply Voltage, V 20 V CC Driver Supply Voltage, V 20 V C Driver Output Voltage, V 20 V GATE C , CS, V (Logic Pins) 6.0 V OSC FB Peak Output Current 1.0 A Steady State Output Current 200 mA Operating Junction Temperature, T 150 C J Operating Temperature Range, T 40 to 85 C A Storage Temperature Range, T 65 to 150 C S ESD (Human Body Model) 2.0 kV Lead Temperature Soldering: Wave Solder: (through hole styles only) (Note 1) 260 peak C Reflow (SMD styles only) (Note 2) 230 peak C Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. 10 sec. maximum. 2. 60 sec. max above 183C. PACKAGE LEAD DESCRIPTION Package Pin Number Pin Symbol Function 1 V Driver pin to gate of external PCh FET. GATE 2 PGND Output power stage ground connection. 3 C Oscillator frequency programming capacitor. OSC 4 GND Logic ground. 5 V Feedback voltage input. FB 6 V Logic supply voltage. CC 7 CS SoftStart and fault timing capacitor. 8 V Driver supply voltage. C