Skip to main content Skip to first level navigation
Skip to main content First level navigation Menu
Contact Us About Us
Facebook (Open link in new window) YouTube (Open link in new window) LinkedIn (Open link in new window) E-mail Newsletter
Main content
Main content

R1290 Series

Triple Output DC/DC Converter for LCD/CCD

  • Consumer
  • Automotive
  • PLP
  • RoHS

The R1290 Series are triple output CMOS-based step-up/inverting DC/DC converters. R1290 consists of the inductor type PWM step-up DC/DC converter (DC/DC1) with an internal 2A Nch. driver and charge pump type positive/negative DC/DC converters (DC/DC2, DC/DC3). Triple output start-up sequence can be set by external capacitors. R1290 is ideally suitable for use in power source for equipment that requires sequence control such as LCD and CCD.

Specs & Datasheets

  Consumer Automotive
Input Voltage Range 2.0 V to 5.5 V (6.5 V)
Operating Temperature Range -40°C to 95°C (125°C) -40°C to 105°C (125°C)
Supply Current Typ. 3.5 mA
Standby Current Typ. 0.1 µA
Output Voltage Range Boost DC/DC: Max. 20 V (Externally Adjustable)
Feedback Voltage 1.0 V
Feedback Voltage Accuracy ±15 mV
Feedback Voltage Temperature Coefficient Typ. ±150 ppm/°C
Driver ON-resistance Typ. 150 mΩ
Oscillator Frequency Externally Adjustable: 180 kHz to 1.4 MHz
Package QFN0404-24
Charge-pump Output Voltage Adjustable with external resistors
Charge-pump VREF/CPPFB Voltage Temperature Coefficient VREF Voltage Temperature Coefficient: Typ. 150 ppm/°C
CPPFB Voltage Temperature Coefficient: Typ. 150 ppm/°C
Charge-pump Oscillator Frequency 1/4 of the main step-up DC/DC converter oscillator frequency

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

Typical Application

Typical Application

For external parts, please refer to the datasheet.

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
QFN0404-24 R1290K R1290K
  • gradeAutomotiveA
  • plpP
QFN0404-24 R1290K R1290K-AE

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Please contact us or our distributors for unpublished reliability information.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

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Boost
min (V)
max (V)
max (V)