S-8533 - SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER
4 Seiko Instruments Inc.
STEP-DOWN, www.DataSheet4U.com Rev.2.3_00 SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8533 Series * Absolute Maximum Ratings Table 2 Parameter VIN pin voltage VOUT pin voltage ON/OFF pin voltage CSS pin voltage NDRV pin voltage PDRV pin voltage NDRV
Rev.2.3_00 www.DataSheet4U.com STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8533 Series The S-8533 Series is a synchronous PWM control CMOS step-down switching regulator controller that includes a reference voltage source, synchronous circuit, oscillation circuit, error amplifier, phase compensation circuit, and PWM controller.
An efficient step-down switching regulator can be realized simply by adding external P-channel and N-channel power MOS FETs, one coil, and three
S-8533 Features
* Synchronous rectification system realizing high efficiency (typ. 94%)
* Use at maximum duty ratio = 100% and use of a battery up to maximum life is possible by using P-channel and Nchannel power MOS FETs externally.
* Oscillation frequency : 300 kHz typ.
* Input vol
