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Overview - S-8330/8331 series
Step-Up Switching Regulator (DC/DC Converter ICs) For LCD Bias Supply S-8330/8331 series
The S-8330/8331 series is a CMOS PWM-control step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage source, an oscillation circuit, a power MOS FET (for S-8330 series) , and an error amplifier. The output voltage can adjust by built-in Electric volume circuit , and equip with shutdown function. The S-8330 series is low current consumption because of CMOS structure , and a step-up switching regulator (DC/DC Converter ICs) constructed by externally connecting only a coil, a capacitor and a diode. This feature, along with its 8-Pin SSOP package and a few external components, makes the S-8330 series ideal for LCD bias generators of portable equipment. For applications requiring a high output current, products used with an external transistor (S-8331 series) are also available.
Features
- Maximum output voltage: 20V to 30V (2V step)
12V range can be adjusted by electric volume - Output voltage accuracy: ±2.4%
- Output current: 5mA (VIN= 5V, VOUT= 30V)
- Low current consumption:
During operation: 100 µA (typ.) (VIN= 5V 180 kHz)
During shutdown: 1.0 µA (max.) - Shutdown function: Stepping up operation is stopped, and Vout pin is shorted to GND while shutdown.
- Input voltage range: 2.0 to 9.0V
- Soft start function: 3 msec (typ.)
- Built-in CR oscillation circuit:
Oscillating frequency: 180 kHz (typ.) (A series)
Oscillating frequency: 50 kHz (typ.) (B series) - 8-pin SSOP plastic package
- 8-bit built-in electric volume circuit
- External transistor type is available (S-8331 series)
- Lead-free products
Applications
- Power supplies for medium type or large type LCD panel
- Power supplies for portable devices such as pagers, handy calculators, and remote controllers
- Constant voltage power supplies for cameras, video equipment, and communications equipment
Standard Circuit
