RICOH R1245x Series 1.2A ∗ 30V Input PWM Step-down DC/DC Converter Manual

The R1245x series is a 30V input CMOS-based PWM step-down DC/DC converter with 1.2A* output current. R1245x includes a soft start circuit and latch or fold-back protection circuit. By simply using an inductor, resistors, a diode, and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. Due to current mode PWM control, the R1245x provides a fast response and high efficiency. Ceramic output capacitors can be used. Compared with R1240x, R1245x has a lot of variation of oscillator frequency and can select 330kHz. In case of 330kHz, R1245x can set VOUT lower than R1240x. The oscillator maximum duty cycle (Min.) of R1245x is larger than R1240x, so it is suitable for low dropout voltage situation. The noise characteristic has been improved rather than R1240x, and voltage accuracy is also improved. In addition to HSOP-8E package can be selected, so R1245S is suitable for high power dissipation case.

Brand: RICOH

File format: PDF

Size: 315 KB

MD5 Checksum: 9C6EBCD139A7FA6694147726F10C3438

Publication date: 10 July, 2012

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