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 start reduces current surges at start up. The short circuit protection timer significantly reduces the duty cycle to approximately 1/30 of its cycle during short circuit conditions. The CS51031 is available in 8L SO and 8L PDIP plastic packages.
The CS51031 is a switching controller designed for use in DC-DC converters, specifically optimized for the buck topology with a minimum number of external components. It integrates a Vcc monitor, a 1.0A power driver for controlling a discrete P-channel transistor, a fixed frequency oscillator, and programmable soft start functionality. The device is available in 8L SO and 8L PDIP plastic packages.
| Oscillator Frequency | 160 to 240 kHz |
|---|---|
| Maximum Duty Cycle | 80.0 to 83.3 % |
| Regulator Threshold Voltage | 1.225 to 1.275 V |
| Fault Threshold Voltage | 1.12 to 1.17 V |
| GATE DC Low Saturation Voltage | 1.2 to 1.5 V |
| GATE DC High Saturation Voltage | 1.5 to 2.1 V |
| Rise Time | 25 to 60 ns |
| Fall Time | 25 to 60 ns |
| Vcc Monitor Turn On Threshold | 4.200 to 4.600 V |
| Current Drain (Switching) | 4.5 to 6.0 mA |
No, the control scheme does not require any loop stability compensation.
The maximum duty cycle is limited to 80%.
The CS51031 is available in 8L SO and 8L PDIP plastic packages.
No, it features lossless short circuit protection since no current sense resistor is required.