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DC/DC Power Solution
RT9041A/RT9041B
500mA, Low Voltage, Low Dropout LDO with External Bias Supply
General Description

The RT9041A/B are low voltage, low dropout linear regulators with an external bias supply input. The bias supply drives the gate of the internal N-Channel pass transistor, making these devices ideal for applications that require low voltage outputs from low voltage inputs. RT9041A and RT9041B provide the fixed version from 1V to 2V with 0.1V increment. Besides, RT9041B provides more feature by using external resistors as adjustable output voltage. The RT9041A/B include a current limit and thermal shutdown that protects the regulator in the event of a fault condition.
The RT9041A/B is available in a SOT-23-6 package.

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Ordering Info


Note :
Richtek Green products are :
►RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
►Suitable for use in SnPb or Pb-free soldering processes.

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Features
• ±2% Output Voltage Accuracy
• No Minimum Load Current Required
• 1V to 5.5V Input Supply Voltage
• 3V to 5.5V Input Bias Supply Voltage
• PGOOD Open-Drain Output (RT9041A)
• Support both Fixed/Adjustable Mode (RT9041B)
• Low Supply Current
• 5mA (max) Shutdown Supply Current
• RoHS Compliant and Halogen Free
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Application
• Notebook Computers
• VID Power Supplies
• PDAs
• Cell Phones
• Low Dropout Regulators with External Bias Supply
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Pin Configurations

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RT9041A


RT9041B

SOT-23-6

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Typical Applications Circuit



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