Skip to main content Skip to first level navigation

RICOH imagine. change.

RICOH ELECTRONIC DEVICES CO., LTD.

Skip to main content First level navigation Menu
Main content

RP503 Series
600mA PWM/VFM Step-down DCDC Converter with Synchronous Rectifier

Product Specifications

The RP503 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP503 is PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. The efficiency in low output current (VFM mode) improved compared with existing products. RP503 includes a soft start circuit, an under-voltage lockout circuit (UVLO), and a latch protection circuit. By simply using an inductor and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured.

FEATURES

Input Voltage Range (Maximum Rating) 2.5 V to 5.5 V (6.5 V)
Supply Current Typ. 20 µA (at VFM mode, at no load)
Standby Current Typ. 0 µA
Output Voltage Range 0.8 V to 2.5 V (0.1 V steps)
Output Voltage Accuracy ±1.5% (VOUT≥1.2V), ±18 mV (VOUT<1.2V)
Temperature-Drift Coefficient of Output Voltage ±100 ppm/°C
Oscillator Frequency Typ. 2.0 MHz
Oscillator Maximum Duty Cycle Min. 100%
Built-in Driver ON Resistance Typ. Pch. 0.34Ω, Nch. 0.43Ω (VIN=3.6V)
UVLO Detector Threshold Typ. 2.2 V
Soft Start Time Typ. 0.15 ms
Lx Current Limit Typ. 800 mA
Latch type Protection Circuit Typ. 1.5 ms
Packages DFN1616-6, SOT-23-5

APPLICATION INFORMATION

RP503L

TYPICAL CHARACTERISTICS

RP503x25xA Efficiency vs. Output Current

PIN DESCRIPTION

DFN1616-61.6 mm × 1.6 mm

DFN1616-6

1 CE
2 AGND
3 VIN
4 Lx
5 PGND
6 VOUT

*) The tab is substrate level (GND).

SOT-23-52.9 mm × 2.8 mm

SOT-23-5

1 VOUT
2 GND
3 Lx
4 VIN
5 CE

RP503 Series for Consumer

APPLICATIONS

  • Power source for battery-powered equipment
  • Power source for hand-held communication equipment, cameras, VCRs, camcorders
  • Power source for HDD, portable equipment

SELECTION GUIDE

The output voltage, auto discharge function, and package for the ICs can be selected at the user’s request.

Product Name   Package Quantity per Reel
RP503Lxx#A-TR Consumter DFN1616-6 5,000
RP503Nxx#A-TR-FE Consumter SOT-23-5 3,000
  • xx … The output voltage can be designated in the range from 0.8V(08) to 2.5V(25) in 0.1V steps. (0.05 V step is also available as a custom code.)
  • # … The auto discharge function at off state are options as follows.
    1: without auto discharge function at off state
    2: with auto discharge function at off state

DOCUMENT/CONTACT

Purchase

Technical Support

Package *1 Marking Reliability *2
DFN1616-6 RP503L RP503L
SOT-23-5 RP503N RP503N (-FE)

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

Inquiry about products

Technical Support

Inquiries (SSL Form)

Inquiry about business

Purchase, Request for Samples and Documents

Distributors

Sample Online

Online Distributors