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The RT8032 is a synchronous, step-down DC/DC converter with input current limit function. The average input current limit can be programmed by an external resistor. Its input voltage range is from 3V to 5.5V and provides an adjustable regulated output voltage from 0.8V to 5V while delivering up to 1.2A of output current. The internal synchronous low on-resistance power switches increase efficiency and eliminate the need for an external Schottky diode. Current mode operation with external compensation allows the transient response to be optimized over a wide range of loads and output capacitors.
The RT8032 is operated in forced continuous PWM Mode which minimizes ripple voltage and reduces the noise and RF interference. The 100% duty cycle in Low Dropout Operation can maximize the battery life.

Applications

  • Distributed Power Systems
  • Battery Charger
  • DSL Modems
  • Pre-Regulator for Linear Regulators
  • 3G/3.5G Data Card
Key Spec.
RT8032
Status EOL
Vin (min) (V) 3
Vin (max) (V) 5.5
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 5
Output Adj. Method Resistor
Iout (max) (A) 1.2
Current Limit (typ) (A) 1.9
Freq (typ) (kHz) 1200
Ext Sync No
Ron_HS (typ) (mOhm) 230
Ron_LS (typ) (mOhm) 230
Iq (typ) (mA) 0.55
Features 100% Duty Cycle;Adjustable Current Limit;Adjustable Soft-Start;Current Mode Control;Force PWM;OCP;Stable with Ceramic Capacitor;UVP
Package Type WDFN4x3-12
Features
  • Programmable Average Input Current Limit
  • 3V to 5.5V Input Range
  • 1.2A Output Current
  • Up to 95% Efficiency
  • 1.2MHz Switching Frequency
  • No Schottky Diode Required
  • Force Continues Mode Operation
  • Low RDS(ON) Internal Switches : 230mΩ
  • Small 12-Lead WDFN Package
  • External Compensation for Optimal Transient Response
  • External Soft-Start
  • Input Over-Voltage Protection
  • RoHS Compliant and Halogen Free
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
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