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The RT9172 series of low dropout linear regulators operate from a 2.25V to 6V input supply. A wide range of preset output voltage options is available. These low dropout linear regulators respond very fast to step changes in load, which are suitable for low voltage microprocessor applications. The RT9172 uses an internal P-MOSFET as the pass device, which does not cause extra GND current in heavy load and dropout condition. The shutdown mode of low operation current makes the IC suitable for power-saving systems. The other features include current limiting and over temperature protection.

Applications

  • Microprocessor Power Supplies
  • GTL, GTL+, BTL, and SSTL Bus Terminators
  • Power Supplies for DSPs
  • SCSI Terminator
  • Post Regulators
  • High Efficiency Linear Regulators
  • Battery Chargers
  • Other Battery Powered Applications
Key Spec.
RT9172 RT9172F RT9172N RT9172S
Status Active Active Active Active
Vin (min) (V) 2.25 2.25 2.25 2.25
Vin (max) (V) 5.5 5.5 5.5 5.5
Vout (min) (V) 1.5 1.5 1.5 1.5
Vout (max) (V) 3.3 3.3 3.3 3.3
Output Adj. Method Fixed Fixed Fixed Fixed
Accuracy (+/- %) 1.5 1.5 1.5 1.5
Iout (max) (mA) 3000 3000 3000 3000
Iq (typ) (uA) 1200 1200 1200 1200
Vdropout @ rated current (typ) (mV) 400 @ 3A 400 @ 3A 400 @ 3A 400 @ 3A
Cout Type Electrolytic;Tantalum Electrolytic;Tantalum Electrolytic;Tantalum Electrolytic;Tantalum
Features Enable Input;Low Dropout;OCP;Power Good Enable Input;Low Dropout;OCP;Power Good Enable Input;Low Dropout;OCP;Power Good Enable Input;Low Dropout;OCP;Power Good
Package Type TO-263
Features
  • Low Dropout Voltage
  • Low Ground Pin Current
  • Load Regulation of 0.4% at 3A
  • 0.5mA Quiescent Current in Shutdown Mode
  • Guaranteed Output Current of 3A DC
  • Available in TO-263 and TO-220 Packages
  • Output Voltage Accuracy ±1.5%
  • Error Flag Indicates Output Status
  • Sense Option Improves Better Load Regulation
  • Extremely Low Output Capacitor Requirements
  • Over Temperature/Over- Current Protection
  • RoHS Compliant and 100% Lead (Pb)-Free
Datasheet
TitleLast UpdateDownload
3A Fixed Output Voltage LDO Regulator2015/04/29
Please confirm with our distributor or sales representative for actual stock status.
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