Key facts
- Brand
- Ricoh
- Model
- R1245X
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-10
Start here
Ricoh R1245x Series Step Down DC/DC Converter Datasheet
The R1245x series are current mode operating type DC/DC converters designed to provide fast response and high efficiency. These ICs consist of an oscillator, PVVM control circuit, voltage reference unit, error amplifier, phase compensation circuit, slope compensation circuit, soft-start circuit, protection circuits, an internal voltage regulator, and a switch for the bootstrap circuit.
The series supports adjustable output voltages of 0.8V or more with external resistors and offers multiple oscillator frequency options ranging from 330kHz to 2400kHz depending on the version. Built-in protections include Lx peak current limit, thermal shutdown, under-voltage lockout (UVLO), and short-circuit protection via latch or fold-back functions.
Ricoh R1245X specifications
| Operating Voltage | 4.5V to 30V |
|---|---|
| Internal N-channel MOSFET Ron | 0.35Q Typ. |
| Peak Current Limit | Typ. 2.0A |
| UVLO Released Voltage | Typ. 4.0V |
| Operating Frequency (A/B) | 330kHz |
| Operating Frequency (E/F) | 1000kHz |
| Operating Temperature Range | -40 to 105 °C |
| Storage Temperature Range | -55 to 125 °C |
Source: Ricoh R1245x Series Step Down DC/DC Converter Datasheet
All Ricoh R1245X documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What packages are available for the R1245x series?
The R1245 series is available in HSOP-8E, DFN(PLP)2020-8, and SOT23-6W packages.
From: Ricoh R1245x Series Step Down DC/DC Converter Datasheet
What type of capacitors are recommended for input and output?
Ceramic type capacitors are recommended for use with the R1245X series.
From: Ricoh R1245x Series Step Down DC/DC Converter Datasheet
What external components are required to configure the R1245x?
The converter can be configured using an inductor, resistors, a diode, and capacitors as external components.
From: Ricoh R1245x Series 1.2A 30V Input PWM Step-down DC/DC Converter Datasheet
What protection circuits are included in the R1245x series?
The series includes a soft start circuit and either a latch or fold-back protection circuit.
From: Ricoh R1245x Series 1.2A 30V Input PWM Step-down DC/DC Converter Datasheet