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The RT9053A is a high performance, 400mA LDO regulator and ultra low dropout. The quiescent current is as low as 42μA, further prolonging the battery life. The RT9053A also works with low ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in handheld wireless devices.
The RT9053A consumes typically 0.7μA in shutdown mode. The other features include low dropout voltage, high output accuracy, and current limiting protection. The RT9053A is available in SOT-23-5 and WDFN-6L 2x2 packages.

Applications

  • Mega Sim Card
  • CDMA/GSM Cellular Handsets
  • Portable Information Appliances
  • Laptop, Palmtops, Notebook Computers
  • Hand-Held Instruments
  • Mini PCI& PCI-Express Cards
  • PCMCIA & New Cards
Key Spec.
RT9053A
Status Active
Vin (min) (V) 2.2
Vin (max) (V) 5.5
Vout (min) (V) 0.8
Vout (max) (V) 5
Output Adj. Method Resistor
Accuracy (+/- %) 1
Iout (max) (mA) 400
Iq (typ) (uA) 35
Vdropout @ rated current (typ) (mV) 230 @ 0.4A
Cout Type Ceramic
Features Enable Input;Fast Transient Response;Low Dropout;OCP;Output Discharge;Stable with Ceramic Capacitor
Package Type SOT-25;WDFN2x2-6
Features
  • Adjustable Output Voltage Down to 0.8V
  • Wide Operating Voltage Ranges : 2.2V to 5.5V
  • Low Dropout : 230mV at 400mA
  • Ultra Fast Response in Line/Load Transient
  • Current Limiting Protection
  • Thermal Shutdown Protection
  • Output Only 1μF Capacitor Required for Stability
  • RoHS Compliant and Halogen Free
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18
Richtek Featured Product Tree [Aug., 2023] Selection Guide2023/08/07
Additional Documents
Title Last Update ShareDownload
Power Management Introduction and Selection Guide 2020/12/07
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT9053AGBSOT-253,000 Request Digikey 12,645 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
RT9053AZQWWDFN2x2-62,500 Request Digikey 2,014 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
Please confirm with our distributor or sales representative for actual stock status.
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