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The R1286 Series are CMOS-based PWM step-up/inverting DC/DC converters featuring 250mA×2 output current with synchronous rectifier. R1286 includes a soft start circuit, an under-voltage lockout circuit (UVLO), a latch protection circuit, a thermal shutdown circuit, and a shutdown circuit. By simply using two inductors and three capacitors as external components, a high-efficiency step-up/inverting DC/DC converter can be easily configured.
R1286 is available in two types: R1286K001B is the type to which the output voltage (VOUTP and VOUTN) can be adjusted by external resistors. R1286KxxxA/C to N are the type to which the step-up output voltage (VOUTP) is internally fixed and the inverting output voltage (VOUTN) can be adjusted dynamically by the single wire interface. The R1286 has a sequenced start up. After the CE pin is enabled, the step-up output is starting up followed by the inverting output after a delay time. As for shutdown, both outputs will be turned off by the auto-discharge function. R1286 is used for applications such as LCD and AMOLED displays.
Specs & Datasheets
|Input Voltage Range||2.3 V to 5.5 V (6.0 V)|
|Operating Temperature Range||-40°C to 85°C (125°C)|
|Supply Current||Typ. 1.2 mA|
|Standby Current||Typ. 0.1 µA|
|Output Voltage Range||Boost: 4.6 V to 5.8 V (Internally fixed or Externally Configurable)
Inverting: -2.0 V to -6.0 V (Internally fixed or Externally Configurable)
|Output Voltage Accuracy||Boost: ±0.9% / Inverting: ±70 mV|
|Feedback Voltage||Boost: 1.0 V / Inverting: 0 V|
|Feedback Voltage Accuracy||Boost: ±15 mV / Inverting: ±25 mV|
|Output Current||Boost: 250 mA / Inverting: 250 mA|
|Oscillator Frequency||Typ. 1.75 MHz|
|Maximum Duty Cycle||Boost: Typ. 85% / Inverting: Typ. 90%|
|TSD||ILX||OCP||OVP||UVLO||OVLO||Reverse||Shutdown||Soft Start||SSCG||PGOOD||Auto Discharge||Anti-ringing||Sequencing||Max Duty||Ext. Phase||LED Adjust|
Quality & Packages
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Please contact us or our distributors for unpublished reliability information.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
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
|TSD||Thermal Shutdown Function|
|ILX||LX Current Limit Function|
|UVLO||Undervoltage Lockout Protection|
|OVLO||Overvoltage Lockout Protection|
|Reverse||Reverse Current Protection Circuit|
|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|