S1F71200 SeriesS1F71200 Series PWM Type Step-up/down DC/DC Switching Regulator
DESCRIPTION
S1F71200 is a step-up/step-down DC/DC converter control IC for which the CMOS process is used and to which a power transistor is connected outside. S1F71200 is composed of an oscillator, a reference voltage circuit, an error amplifier, a PWM circuit, a series regulator, a driver, etc. When this IC drives an external power transistor, S1F71200 can constitute a step- up/step-down DC/DC converter that operates as a [step- down] series regulator when the input voltage is High and that operates as a [step-up] switching regulator of pulse width modulation system (PWM) when the input voltage is Low.
S1F71200 is also provided with an overcurrent protection circuit and a soft start circuit. When receiving external signals, S1F71200 can stop the oscillator and the switching circuit and turn off the power, so that it can reduce wasteful current consumption at the time of system halt.
FEATURES
• | Input voltage | : 2.5V to 12.0V |
• | Output voltage | : 5.0V (S1F71200M0A0) |
| | 3.3V (S1F71200M0B0) |
• | Power off current | : 1.0μA |
• | Self current consumption | : 150μA |
| | (step-up portion) |
| | 15μA |
| | (step-down portion) |
•Frequency fixing (200kHz) PWM at step-up time
•Power off function (IC shutdown)
•Soft start function
•Overcurrent protection function
• Shipping pattern | : plastic package |
| (SSOP2-16 pin) |
*Radiation-resistant design has not been provided for this specification.
S1F70000 Series Technical Manual
