R1215D Series


Data Sheet / Flyer
Data Sheet * Flyer

The R1215D is a CMOS-based PWM step-up DC/DC controller with low supply current. The R1215D consists of an oscillator, a PWM comparator circuit, a reference voltage unit, an error amplifier, a reference current unit, a protection circuit, and an under voltage lockout (UVLO) circuit. A low ripple, high efficiency step-up DC/DC converter can be composed of this IC with some external components, or an inductor, a diode, a power MOSFET, resisters, and capacitors.
The maximum duty cycle and the soft start time are easily adjustable with external resistors and capacitors. As for the protection circuit, after the soft-starting time, if the maximum duty cycle is continued for a certain period, the R1215D latches the external driver with its off state, or the latch-type protection circuit works.
The delay time for latch the state can be set with an external capacitor.
To release the protection circuit, restart with power-on (Voltage supplier is equal or less than UVLO detector threshold level).

Input Voltage Range 1.8 V to 5.5 V
Two Options of Basic Oscillator Frequency Typ. 700kHz, 1.4MHz
Built-in Latch-type Protection Function (Output Delay Time can be set with an external capacitor)
Maximum Duty Cycle/Soft-start time Adjustable with external capacitors
High Reference Voltage Accuracy ±1.5%
UVLO Threshold level Typ. 1.6 V/ 1.79 V by mask option
Small Temperature Coefficient of Reference Voltage Typ. ±150ppm/°C
Package SON-8 (t=Max. 0.9mm)
  • Constant Voltage Power Source for portable equipment.
  • Constant Voltage Power Source for LCD and CCD.

Data Sheet Flyer Package Info. Mark Info. Quality Assurance Data
R1215D Series
R1215D Series SON-8 R1215D Reliability

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