CS51031

Features:

·1A Totem Pole Output river
·High Speed Oscillator 700kHz max)
·No Stability ompensation Required
·Lossless Short Circuit rotection
·VCC Monitor
·2% Precision Reference
·Programmable Soft Start


Pinout




Specifications

Power Supply Voltage, V_CC....................................................................................................................................20V
Driver Supply Voltage, V_C.......................................................................................................................................20V
Driver Output Voltage, V_GATE ................................................................................................................................20V
C_OSC, C_S, V_FB (Logic Pins) .......................................................................................................................................6V
Peak Output Current.............................................................................................................................................1.0A
Steady State Output Current ...........................................................................................................................200mA
Operating Junction Temperature, T_J....................................................................................................................150
Operating Temperature Range, T_A...........................................................................................................-40¡ to 125
Storage Temperature Range, T_S...............................................................................................................-65 to 150
ESD (Human Body Model).......................................................................................................................................2kV
Lead Temperature Soldering Wave Solder (through hole styles only) ..................................10 sec. max, 260 peak
Reflow (SMD styles only) ..................................................................................60 sec. max above 183, 230 peak


Description

The CS51031 is a switching controller for use in DC-DC converters. It can be used in the buck topology with a minimum number of external components. The CS51031 consists of a VCC monitor for controlling the state of the device, 1.0A power driver for controlling the gate of a discrete P-channel transistor, fixed frequency oscillator, short circuit protection timer, programmable soft start, precision reference, fast output voltage monitoring comparator, and output stage driver logic with latch. The high frequency oscillator allows the use of small inductors and output capacitors, minimizing PC board area and systems cost.

The programmable soft CS51031 start reduces current surges at start up. The short circuit protection timer significantly reduces the duty cycle o approximately 1/30 of its cycle uring short circuit conditions.

The CS51031 is available in 8L SO nd 8L PDIP plastic packages.