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R1200 Series
PWM Step-up DCDC Converter for PMOLED and General Use with Shutdown Function

Product Specifications

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.

FEATURES

Input Voltage Range (Maximum Rating) 2.3 V to 5.5 V (6.5 V)
Supply Current Typ. 500 µA
Standby Current Typ. 0 µA
Feedback Voltage 1.0V (Externally adjustable)
Feedback Voltage Accuracy ±1.5%
Temperature-Drift Coefficient of Feedback Voltage ±150 ppm/°C
Oscillator Frequency Typ. 1.2 MHz
Maximum Duty Cycle Typ. 91%
Switch ON Resistance Typ. 1.35 Ω
UVLO Detector Threshold Typ. 2.0 V
Soft-start Time Typ. 1.5 ms
Lx Current Limit Protection Typ. 700 mA
OVP Detector Threshold 17 V, 19 V, 21 V
Switching Control PWM
Built-in Rectifier NPN transistor at standby mode, complete shutdown is possible.
Built-in Auto discharge function A version
Packages DFN1616-6, DFN(PLP)1820-6, SOT-23-6
Ceramic capacitors are recommended 1 µF

APPLICATION INFORMATION

By simply using an inductor, divider resistors and capacitors as external components, a high-efficiency step-up DC/DC converter can be easily configured.

* R1, R2 : For setting output voltage, R3 : 2kΩ, C3 : 220pF

TYPICAL CHARACTERISTICS

R1200x Efficiency vs. Output Current

PIN DESCRIPTION

DFN1616-61.6 mm × 1.6 mm

DFN1616-6

1 CE
2 VFB
3 Lx
4 GND
5 VIN
6 VOUT

*) The tab is substrate level (GND).

DFN(PLP)1820-61.8 mm × 2.0 mm

DFN(PLP)1820-6

1 CE
2 VFB
3 Lx
4 GND
5 VIN
6 VOUT

*) The tab is substrate level (GND).

SOT-23-62.9 mm × 2.8 mm

SOT-23-6

1 CE
2 VOUT
3 VIN
4 Lx
5 GND
6 VFB

R1200 Series for Consumer

APPLICATIONS

  • OLED power supply for portable equipment
  • White LED Backlight for portable equipment

SELECTION GUIDE

The OVP threshold voltage, auto discharge function, and the package for the ICs can be selected at the user's request.

Product Name   Package Quantity per Reel
R1200Lxxx#-TR Consumter DFN1616-6 5,000
R1200Kxxx#-TR Consumter DFN(PLP)1820-6 5,000
R1200Nxxx#-TR-FE Consumter SOT-23-6 3,000
  • xxx … Designation of OVP detector threshold
    001: 17V
    002: 19V
    003: 21V
  • # … The auto discharge function at off state are options as follows.
    A: with auto discharge function at off state
    B: without auto discharge function at off state

DOCUMENT/CONTACT

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Technical Support

Package *1 Marking Reliability *2
DFN1616-6 R1200L R1200L
DFN(PLP)1820-6 R1200K R1200K
SOT-23-6 R1200N R1200N (-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.

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