Ricoh R1242S Manuals

Key facts

Brand: Ricoh
Model: R1242S
Industry: Industrial
Documents: 2
Languages: EN
Last added: 2012-07-10

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Ricoh R1242S Series 30V Input 3A Buck DC/DC Converter Datasheet

Datasheet 25 pages · 580 KB · EN

The Ricoh R1242S Series are CMOS-based synchronous rectified step-down DC/DC converters with a built-in high-side switch. These ICs are designed to supply a maximum 3A output current and operate with a current mode topology that does not require a sense resistor, achieving high speed and efficiency. The series supports an operating voltage range of 5V to 30V and includes various protection functions such as peak current limit, latch, fold back, thermal shutdown, and undervoltage lockout.

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Ricoh R1242S specifications

Operating Voltage	5V ~ 30V
Supply Current	Typ. 0.8mA
Output Current	3A
Peak Current Limit	Typ. 4.5A
Adjustable Output Voltage	0.8V ~ 15V
Feedback Voltage Accuracy	1.5%
Soft Start Time	Typ. 0.5ms
Maximum Duty Cycle	Typ. 88%
Thermal Shutdown Temperature	Typ. 160°C
Operating Temperature Range	-40 ~ 85 °C

Source: Ricoh R1242S Series 30V Input 3A Buck DC/DC Converter Datasheet

All Ricoh R1242S documents by type

Datasheet 2

Ratings, dimensions and ordering codes, for selection and design work.

Questions answered in these manuals

What is the maximum output current of the R1242S Series?

The R1242S Series can supply a maximum 3A output current.

From: Ricoh R1242S Series 30V Input 3A Buck DC/DC Converter Datasheet

Does the R1242S Series require a sense resistor?

No, it operates with Current Mode Topology which does not require any sense resistor.

From: Ricoh R1242S Series 30V Input 3A Buck DC/DC Converter Datasheet

What is the input voltage range for the R1242S?

The input voltage range is 0V to 30.0V.

From: Ricoh R1242S Series 3A 30V Input PWM Step-down DC/DC Converter Datasheet

Can ceramic output capacitors be used with this converter?

Yes, ceramic output capacitors can be used.