Jump to main content

RICOH


Global RICOH Co.,Ltd. Electronic Devices Company | Site Map |

Products & Solutions > Industrial Products > Electronic Devices > Power Management ICs
> DC/DC Converters > Step-down DC/DC Converter Lineup > RP500x Series
Products Distributors About Us Contact Us
* Products
* Power Management ICs
* Real-time clock ICs
* PC Interface
* Communication LSI / Image Processing LSI
* Manufacturing Service
* Product List
JapaneseEnglishchinese
Korean

Search
ricoh.com/LSI/
 



Main Content

RP500x Series


Step-Down DC/DC CONVERTER with Synchronous Rectifier




| * Outline | * Features | * Applications | * Documenets Download |



Outline


The RP500X Series are CMOS-based step-down DC/DC Converters with synchronous rectifier.

Each of these ICs consists of an oscillator, a switching control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, protection circuits, UVLO circuit, switching transistors, and so on. A low ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with only an inductor and capacitors. In terms of the output voltage, since the feedback resistances are built-in, the voltage is fixed internally.
50mV(custom-made) step output can be set by laser-trim and 1.5% or 24mV tolerance depending on the output voltage is guaranteed.

Mode alternative circuit works automatically for improving the efficiency. Considering fixed noise frequency, PWM fixed control type is also available. As protection circuits, the current limit circuit which limits peak current of Lx at each clock cycle, and the latch type protection circuit which works if the term of the over-current condition keeps on a certain time exist. The latch-type protection circuit works to latch an internal driver with keeping it disable. To release the condition of the protection, after disabling this IC with a chip enable circuit, enable it again, or restart this IC with power-on or make the supply voltage at UVLO detector threshold level or lower than UVLO.

Since packages are DFN(PLP)1820-6, SOT23-6, WLCSP-6 (0.16φ), high density mounting on boards is possible.

*To Top

Features


*Input Voltage Range 2.55V to 5.50V
*Output Voltage 1.1V to 3.3V
(It is possible in the range from1.1V to 3.3V with a step 0.1V)
*High Accuracy Output Voltage ±1.5% (Vout≥1.6V)
±24mV (Vout<1.6V)
*Supply Current Typ.400μA(at PWM mode)
Typ.100μA(at PFM mode)
*Oscillator Frequency Typ. 1.2MHz
*Built-in Soft-start Function Typ.0.1ms
*Built-in Latch type Protection Typ. 1.5ms
*Built-in UVLO Function Typ. 2.2V
*Two choices of Switching Mode Automatic PWM/PFM mode change / PWM fixed
*Package DFN(PLP)1820-6, SOT23-6W, WLCSP-6 (0.16φ)
*To Top

Applications

Power source for portable equipment such as cellular, PDA, DSC, Notebook PC
Power source for HDD
Power source for Li-ion battery-used equipment
*To Top

Documents Download


Data Sheet
(PDF)
Package Info.
(PDF)
Mark Info.
(PDF)

Quality Assurance Data
(PDF)

*RP500x Series
EA-155-080522(473KB)
*DFN(PLP)1820-6
to be prepared *Reliability
*SOT-23-6W
to be prepared *Reliability
*WLCSP-6-P2
to be prepared *Reliability

* All PDF files are less than 1MB unless otherwise stated.
* If you don't have Adobe Reader, you can download free.
* Get Adobe Reader
Get Adobe Reader

*To Top


Technical Info.

* Application Note

Application Note

Technical Information on Ricoh Power Management ICs.
*

Quick Links

* Quality Assurance System
(PDF:175KB)
* Inductor Information
(PDF:70KB)


Product Catalog

Selection Guide
Selection guide is available for download in PDF format.



Non-promotion / Discontinued Products

* Power Management ICs
* Real-time clock ICs


Lead (Pb) Free Information

All of the Lead-free products comply with RoHS Directive. RoHS Compliant


Contact Us

Distributors
Our sales activities
Contact US
Other Inquiries






| Privacy | Terms of Use | About the Use of Technical Information in this website. | Copyright (C) 2000-2008 Ricoh Co., Ltd. All Rights Reserved.