R1200x Series

STEP-UP DC/DC CONVERTER FOR OLED BACK LIGHT with SHUTDOWN FUNCTION

Data Sheet / Flyer
Data Sheet * Flyer

R1200x series are CMOS-based control type step-up DC/DC converter with low supply current ICs. Each of these ICs consists of a Nch MOSFET, NPN transistor, an oscillator, PWM comparator, a voltage reference unit, an error amplifier, a current limit circuit, an under voltage lockout circuit (UVLO), an over voltage protection circuit (OVP), and a soft start circuit. As the external components, an inductor, resistances or capacitors are necessary to make a constant output voltage of step-up DC/DC converter with the R1200x. At standby mode, the NPN transistor can separate the output from the input. During the situation of that, there are two versions.

R1200xxxxA: the output of VOUT is generated to 0V by the low resistance (with the auto discharge function).

R1200xxxxB does not generate the output of VOUT (without the auto discharge function).

The soft-start time (Typ. 1.5ms) and the maximum duty cycle (Typ. 91%) are set internally. For the protection functions of R1200x series are the current limit function of the LX peak current, the OVP function for detection the over voltage of output and the UVLO function for protective miss-operation by the low voltage. (The threshold of OVP is selectable from 17V, 19V or 21V.)

Since the packages for these ICs are DFN1616-6, DFN(PLP)1820-6, SOT-23-6 and WLCSP-6-P1 (Non-promotion), therefore high density mounting of the ICs on boards is possible.

Note : Discontinued Products
WLCSP-6-P1 (R1200Z Series) will be discontinued at the end of January, 2014.
Supply Current Typ. 500µA
Standby Current Max. 3µA
Input Voltage Range 2.3V to 5.5V
Feedback Voltage 1.0V (Externally adjustable)
Feedback Voltage Accuracy ±1.5%
Temperature-Drift Coefficient of Feedback Voltage ±150ppm/°C
Oscillator Frequency Typ. 1.2MHz
Maximum Duty Cycle Typ. 91%
Switch ON Resistance Typ. 1.35Ω
UVLO Detector Threshold Typ. 2.0V
Soft-start Time Typ. 1.5ms
Lx Current Limit Protection Typ. 700mAv
OVP Detector Threshold 17V, 19V, 21V
Switching Control PWM
Built-in a 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,
WLCSP-6-P1 (Non-promotion)
Ceramic capacitors are recommended 1µF
  • OLED power supply for portable equipment
  • White LED Backlight for portable equipment

Data Sheet Flyer Design Guide
R1200x Series R1200x Series R1200x Series
Package Info. Mark Info. Quality Assurance Data
DFN1616-6 R1200L Reliability
DFN(PLP)1820-6 R1200K Reliability
SOT-23-6 R1200N Reliability

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