Key facts
- Brand
- Ricoh
- Model
- R1211X
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-09
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Ricoh R1211x Series PWM Step-Up DC/DC Controller Datasheet
The R1211x Series are CMOS-based PWM step-up DC/DC converter controllers featuring low supply current. The series includes an oscillator, PWM control circuit, reference voltage unit, error amplifier, and protection circuits. Phase compensation is internal for B/D versions and external for A/C versions.
Read onlineRicoh R1211X specifications
| Input Voltage Range | 2.5V to 6.0V |
|---|---|
| Oscillator Frequency | 300kHz, 700kHz |
| Maximum Duty Cycle | Typ. 90% |
| Operating Temperature Range | -40 ~ +85 °C |
Source: Ricoh R1211x Series PWM Step-Up DC/DC Controller Datasheet
All Ricoh R1211X documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the typical soft-start time for the 700kHz version?
The soft-starting time is typically set at 9ms for the A/B, 700kHz version.
From: Ricoh R1211x Series PWM Step-Up DC/DC Controller Datasheet
What is the typical soft-start time for the 300kHz version?
The soft-starting time is typically set at 10.5ms for the C/D, 300kHz version.
From: Ricoh R1211x Series PWM Step-Up DC/DC Controller Datasheet
What are the two main versions of the R1211x Series?
The series includes A/C versions with adjustable phase compensation and B/D versions with internal phase compensation.
From: Ricoh R1211x Series PWM Step-up DC/DC Controller Datasheet
Does the R1211x include an internal output transistor?
No, it does not include an internal output transistor and requires external components like a power MOS.
From: Ricoh R1211x Series PWM Step-up DC/DC Controller Datasheet