Skip to main content Skip to first level navigation
Skip to main content First level navigation Menu
Contact Us About Us ricoh.com
Breadcrumbs
Facebook (Open link in new window) YouTube (Open link in new window) LinkedIn (Open link in new window)
Main content
Main content

R1200 Series

PWM Step-up DC/DC Converter for PMOLED and General Use with Shutdown Function

  • Consumer
  • RoHS

The R1200 Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive PMOLED or white LEDs with constant current. The R1200 includes an under-voltage lockout circuit (UVLO), a soft-start circuit, and an over-voltage protection circuit (OVP). By simply using an inductor, divider resistors, and capacitors as external components, PMOLEDs and white LEDs can be driven with high efficiency.

At the standby mode, the internal NPN transistor can separate the output from the input. (Shutdown function) By this shutdown function, the LED current can be completely shutdown, and output voltage for PMOLED can be completely cut off, therefore, the R1200 does not have bad impact on the life expectancy of PMOLED. The version with auto-discharge function is available.

Specs & Datasheets

  Consumer
Input Voltage Range 2.3 V to 5.5 V (6.5 V)
Operating Temperature Range -40°C to 85°C (125°C)
Supply Current Typ. 500 µA
Standby Current Typ. 0 µA
Output Voltage Range Max. 20 V (0.1 V step)
Feedback Voltage 1.0 V (Externally adjustable)
Feedback Voltage Accuracy ±1.5%
Feedback Voltage Temperature Coefficient ±150 ppm/°C
Driver ON-resistance Typ. 1.35 Ω
Oscillator Frequency Typ. 1200 kHz
Maximum Duty Cycle Typ. 91%
Package DFN1616-6, SOT-23-6

Download Datasheet

Protections / Functions

Functional Description

TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust
                   

Technical Documents

Typical Application

Typical Application

* R1, R2 : For setting output voltage, R3 : 2kΩ, C3 : 220pF
By simply using an inductor, divider resistors and capacitors as external components, a high-efficiency step-up DC/DC converter can be easily configured.

R1200 Efficiency vs. Output Current

R1200 Efficiency vs. Output Current

Quality & Packages

Product Name Compatibility Package Marking Reliability
R1200Lxxxx-TR
  • gradeConsumerC
DFN1616-6 R1200L R1200L
R1200Nxxxx-TR-FE
  • gradeConsumerC
SOT-23-6 R1200N R1200N-FE

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

Functional Description

TSD Thermal Shutdown Function
ILX LX Current Limit Function
OCP Overcurrent Protection
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Boost
VIN
min (V)
2.3
VIN
max (V)
5.5
VOUT
max (V)
20
ISS
(µA)
500