1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter


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The RT8016 is a high-efficiency Pulse-Width-Modulated (PWM) step-down DC-DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8016 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.
Two operating modes are available including : PWM/Low-Dropout autoswitch and shut-down modes, the Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.
The RT8016 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper PMOS. The RT8016 enters shut-down mode and consumes less than 0.1μA when EN pin is pulled low. The RT8016 also offers a range of 1V to 3.3V with 0.1V per step or adjustable output voltage by two external resistor.
The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small WDFN-6L 2x2 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.


  • Mobile Phones
  • Personal Information Appliances
  • Wireless and DSL Modems
  • MP3 Players
  • Portable Instruments
Key Spec.
Status Active
Vin (min) (V) 2.5
Vin (max) (V) 5.5
Number of Outputs 1
Vout (min) (V) 0.6
Vout (max) (V) 5.5
Output Adj. Method Fixed;Resistor
Iout (max) (A) 1
Current Limit (typ) (A) 2
Freq (typ) (kHz) 1500
Freq (min) (kHz) 1200
Freq (max) (kHz) 1800
Ext Sync No
Ron_HS (typ) (mOhm) 280
Ron_LS (typ) (mOhm) 250
Iq (typ) (mA) 0.05
Features 100% Duty Cycle;Current Mode Control;Enable Input;Force PWM;OCP;OTP
Package Type WDFN2x2-6
  • +2.5V to +5.5V Input Range
  • Adjustable Output From 0.6V to VIN
  • 1A Output Current
  • 95% Efficiency
  • No Schottky Diode Required
  • 1.5MHz Fixed-Frequency PWM Operation
  • Small 6-Lead WDFN Package
  • RoHS Compliant and 100% Lead (Pb)-Free
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