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R1283 Series

PWM Step-up/Inverting DC/DC Converter for CCD/LCD

  • Consumer
  • PLP
  • RoHS

The R1283 Series are dual output CMOS-based PWM step-up/inverting DC/DC converters. R1283 includes a soft start circuit, an under-voltage lockout circuit (UVLO), and a latch protection circuit. By simply using inductors, resistors, capacitors, and diodes as external components, a high-efficiency step-up/inverting DC/DC converter can be easily configured.

R1283 has internal 400mΩ ON resistance transistors for both step-up and inverting. Start-up sequence of two DC/DC converters can be selected. Since the shutdown sequence can also be set by the auto-discharge function of the inverting DC/DC converter, the products are ideally suitable for applications that require setting of power supply start-up/shutdown sequence for CCD, LCD, and OLED.

Specs & Datasheets

Input Voltage Range 2.5 V to 5.5 V (6.5 V)
Operating Temperature Range -40°C to 85°C (125°C)
Supply Current Typ. 2 mA
Standby Current Typ. 0.1 µA
Output Voltage Range Boost: Max. 20 V (Externally Adjustable)
Inverting: VCC-20 V(Externally Adjustable)
Output Voltage Accuracy ±1.5% (Ta = 25°C)
Driver ON-resistance Boost Nch driver: Typ. 400 mΩ
Inverting Pch driver: Typ. 400 mΩ
Oscillator Frequency Typ. 300 kHz, 700 kHz, 1.4 MHz
Maximum Duty Cycle Typ. 91%
Package DFN(PLP)2730-12

Download Datasheet

Protections / Functions

Functional Description

TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust

Technical Documents

Design Support

Typical Application

Typical Application

Efficiency vs. Output Current

Efficiency vs. Output Current

Efficiency vs. Output Current

Efficiency vs. Output Current

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
DFN(PLP)2730-12 R1283K R1283K

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Please contact us or our distributors for unpublished reliability information.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

Functional Description

TSD Thermal Shutdown Function
ILX LX Current Limit Function
OCP Overcurrent Protection
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
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

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