The KTZ8812 is a dual output power supply IC used in portable appliances where both a positive and negative supply is required. The positive and negative output rails provide bias supplies for TFT LCD panels, OPA, Audio Amplifiers, DAC etc. The device only requires a single inductor, thereby minimizing the total PCB area.

It features an integrated step-up DC-DC converter with input voltage range from 2.7V to 5.5V. An LDO and charge pump generate dual regulated outputs, whose voltages can be programmed via an I2C compatible interface. Optimized step-up, LDO and charge pump converters maximize conversion efficiency, exceeding 85%.

KTZ8812 integrates all compensation and soft-start circuitry, which results in a simpler and smaller solution with much fewer external components. High switching frequency (1.8MHz) allows the use of a smaller inductor and capacitor to further reduce the solution size.

The I2C compatible interface allows control of the positive and negative outputs from +4.0V to +6.3V and from -4.0V to -6.3V, respectively, as well as programming additional registers on the device.

KTZ8812 is available in a RoHS compliant 15-bump 2.2mm x 1.45mm x 0.62mm WLCSP.


  • Input voltage range (2.7V to 5.5V)
  • Dual output regulator with single inductor
  • High efficiency above 85%
  • Charge pump with PFM mode at light load
  • Programmable output voltages
  • Positive output voltage range
    • +4.0V to +6.3V (100mV/step)
  • Negative output voltage range
    • -4.0V to -6.3V (100mV/step)
  • Programmable regulator offset voltage
  • 1.0% output voltage accuracy
  • Regulated output current up to 150mA
  • Programmable active discharge
  • I2C compatible interface
  • 1 µA shutdown supply current
  • Pb-free WLCSP-15 package
  • -40°C to +85°C Temperature Range


  • Smartphone or Tablet TFT-LCD
  • Operational Amplifiers
  • Audio Amplifier Power
  • Digital to Analog converters
  • General Dual Power Supply Applications

Packaging Information

Package Dimensions Bumps Package Type
WLCSP35-15 2.20mm x 1.45mm x 0.62mm 15 UO


Vin (min)  Vin (max)  Control Type
2.5V 5.5V I2C

Technical Documentation

Description Documents Type
Package Outline DrawingWLCSP35-15 UO PODPDF


Part Number Marking1 Operating Temperature Package
KTZ8812EUO-TR IRYYZZ -40°C to +85°C WLCSP-15
KTZ8812BEUO-TR MEYYZZ -40°C to +85°C WLCSP-15
Purchase Options
Buy from Digi-Key
Buy from Mouser