R1286K Series

2ch DCDC (Step Up DC/DC and Inverting DC/DC)

Data Sheet / Flyer
Data Sheet * Flyer

The R1286 2ch DC/DC converter is designed for AMOLED display power source. It contains a step up DC/DC converter and an inverting DC/DC converter.
Step up DC/DC converter generates boosted output voltage to 4.6V ~ 5.8V(Selectable). Inverting DC/DC converter generates negative voltage down to -2.0V ~ -6.0V(Selectable) that is dynamically adjustable with single wire interface signal. R1286 consist of a voltage reference, error amplifiers, an oscillator, PWM control circuits, over current protection circuits, short protection circuits, an under voltage lockout circuit (UVLO), thermal shutdown circuit, a NMOS driver and a synchronous PMOS switch for boost converter, a PMOS driver and a synchronous NMOS switch for inverting converter, and so on. High efficiency boost and inverting DC/DC converters can be composed with two external inductors and three capacitors.

  • Operating Voltage
2.3V to 5.5V
  • Step Up DC/DC (CH1)
  Output Voltage (VOUTP) 4.6V to 5.8V (Selectable / 0.1V Step) [ R1286KxxxX ]
Adjustable VOUT from 4.6V to 5.8V with external resistors [ R1286K001B ]
Output Current (IOUTP) 250mA [ R1286K0xxX/R1286K001B]
300mA [ R1286K1xxX]
  • Inverting DC/DC (CH2)
  Dynamically adjustable Output Voltage (VOUTN) -2.0V to -6.0V (Range is fixed 3.0V / 0.1V Step)
Single wire (S-Wire) interface (Default Value is Selectable / 0.1V Step) [ R1286KxxxX ]
Adjustable VOUT from -2.0V to -6.0V with external resistors [ R1286K001B ]
Output Current (IOUTN) 250mA [ R1286K0xxX/R1286K001B]
300mA [ R1286K1xxX]
  • Control and Protection
  Internal start up sequence control with soft start operation
Auto discharge operation for both outputs
  • Over current protection
Typ.1.0A(boost) / 1.5A(inverting) [ R1286K0xxX ]
Typ.1.1A(boost) / 1.8A(inverting) [ R1286K1xxX ]
  Short circuit protection
  UVLO(Under voltage lock out) protection 2.05V
  Thermal shutdown 150°C
  Operating frequency 1750kHz
  Maximum Duty Cycle 85% for boost converter / 90% for inverting converter
  • Package
DFN(PLP)2730-12
  • Fixed voltage power supply for portable equipment
  • Fixed voltage power supply for AMOLED, LCD
Data Sheet Flyer Design Guide Package Info. Quality Assurance
Data
R1286K Series R1286K Series R1286Kxxxx Series DFN(PLP)2730-12 Reliability

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