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Ricoh launches 4A PWM step-down DCDC converter for industrial, automotive and consumer applications

Ricoh Europe, Amstelveen, the Netherlands, 18 January, 2017 – Ricoh Europe (Netherlands) B.V. Semiconductor Support Centre has launched the new 4A synchronous buck DC/DC converter RP510 with an input voltage range up to 5.5V and an optional fixed or adjustable output voltage range from 0.8V to 3.3V. The DC/DC converter supports Power Supplies or Point of Load converters for Microprocessors, FPGAs or DSPs.

Point of Load power supplies solve the challenge of high peak current demands and low noise margins, required by high-performance processors, by placing individual power supply regulators close to their point of use.PR21_Ricoh_RP510_2016_17oLogos.png

The device features a range of protection circuits contributing to the safe operation of the application. A Power-Good (PG) output provides a fault signal to the system when the device is not ready for regular operation or when any of the protection circuits or states are active.

  • An Under Voltage Lock Out (UVLO) function disables the chip below a minimum input voltage level.
  • The Thermal Shutdown function protects the device during an overload condition and disables it when exceeding a temperature threshold.
  • The Output Over Voltage Detection (OVD) and Under Voltage Detection (UVD) indicate a fault signal when the output voltage is 20% above or below the regular setting value.
  • With the Over Current protection option, the designer can either select from a latched mode or fold-back version, depending on the application requirements. Latched over current protection shuts down the chip after detecting an excessive high load for a specified time and requires a reboot of the power supply to resume to normal operation after removing the excessive load. The fold-back protection circuit is triggered in a similar way but reduces the switching frequency in order to lower the excessive load current, the circuit will be released automatically after removing the excessive load.

The adjustable Soft Start Time provides a smooth output voltage ramp up, by using an external capacitor. The oscillator frequency is internally fixed at 2.3MHz and the RP510 requires a small inductor of 1µH. RP510 is available in a compact 3 x 3mm DFN3030-12 package, convenient to be used on high density boards.

RP510 Features:

Input Voltage Range 2.5V to 5.5V
Output Voltage Range 0.8V to 3.3V
Output Voltage Accuracy ±1% (Vset ≥ 1.2V), ±12mV (Vset < 1.2V)
Feedback Voltage Accuracy ±6mV (Vfb = 0.6 V)
Output/Feedback Voltage Temperature Coefficient ±100ppm/°C
Standby Current Typ.0.35μA (RP510LxxN), Typ.0.01μA or less (RP510LxxG/H/J)
Oscillator Frequency Typ. 2.3MHz
Built-in Driver On-resistance (Pch./Nch.) Typ.40mΩ (VIN=3.6V)
Maximum Duty Cycle Min. 100%
Operating Temperature Range  −40°C to 85°C
Protection Features UVLO, LX Peak Current Limit, Latch/Foldback Overcurrent Protection,Thermal Shutdown
Power Good Output NMOS Open-drain Output
Package DFN3030-12

Above details refer to consumer version, please visit our website for industrial and automotive specifications

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About Ricoh
Ricoh is a global technology company that has been transforming the way people work for more than 80 years. Under its corporate tagline – imagine. change. – Ricoh continues to empower companies and individuals with services and technologies that inspire innovation, enhance sustainability and boost business growth. These include document management systems, IT services, production print solutions, visual communications systems, digital cameras, and industrial systems.

Headquartered in Tokyo, Ricoh Group operates in approximately 200 countries and regions. In the financial year ending March 2016, Ricoh Group had worldwide sales of 2,209 billion yen (approx. 19.6 billion USD).

In March 2001 Ricoh Europe (Netherlands) B.V. established the Semiconductor Support Centre to support European distributors and electronics designers and manufacturers with their applications or other enquiries about Power Management and Real Time Clock ICs.