Voltage Dropout (Max):	0.6V @ 3A
Supplier Device Package:	TO-263-5
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	--
Current - Quiescent (Iq):	250µA
Current - Output:	3A
Series:	--
Voltage - Output (Max):	4.9V
Voltage - Output (Min/Fixed):	1.24V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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RT9033GM5 Application Field and Working Principle

Introduction

RT9033GM5 is a 3-terminal ultra-low-power linear voltage regulator integrated circuit, which can provide up to 120mA load current. It is advanced from the previous type, with the advantage of having higher efficiency and lower output noise. The product is mainly used for low-power and portable applications such as digital cameras, laptops and hand-held devices. The output voltage range is from 0.7V to 4.2V, with an external output capacitor of 0.22µF to 10µF.

Features

RT9033GM5 has the following features:

• 3-Terminal Ultra-Low-power Linear Voltage Regulator
• Provide up to 120mA Load Current
• Output Voltage Range from 0.7V to 4.2V
• Ultra-low Quiescent Current (5μA Typ, 10μA Max)
• Low Output Voltage Ripple
• Internal Current Limiting and Overtemperature Shut Down
• External Output Capacitor0.22µF to 10µF

Applications

RT9033GM5 is mainly used in applications that need low-power and ultra-low quiescent current such as digital cameras, laptop computers and hand-held devices.

Working Principle

The basic working principle of RT9033GM5 is to reduce the input voltage and then regulate the output voltage to the desired level. The voltage reduction is achieved by using a switch-mode power converter, which comprises an N-channel MOSFET and a P-channel MOSFET. When the load demands more current, the RT9033GM5 switches ON the N-channel MOSFET and OFF the P-channel MOSFET, allowing the input voltage to pass through the N-channel MOSFET and reduce the output voltage.The RT9033GM5 also includes a voltage feedback sensing circuit, which senses the output voltage and compares it to the reference voltage. Depending on the difference between the two voltages, the RT9033GM5 adjusts the on-time of the N-channel MOSFET to maintain the output voltage at the desired level.In addition, the RT9033GM5 also features built-in current limiting and overtemperature shut down. The current limiting function prevents excessive current draw by shutting off the output when the current reaches a preset level. The overtemperature shut down feature helps to prevent thermal overheating by shutting off the output when the temperature reaches a preset level.

Conclusion

The RT9033GM5 is a 3-terminal ultra-low-power linear voltage regulator integrated circuit, which can provide up to 120mA load current. It has ultra-low quiescent current, low output voltage ripple, internal current limiting and overtemperature shut down. It is mainly used for low-power and portable applications such as digital cameras, laptops and hand-held devices. The RT9033GM5 works by reducing the input voltage and then regulating the output voltage to the desired level. It also includes a voltage feedback sensing circuit, which senses the output voltage and adjusts the on-time of the N-channel MOSFET to maintain the output voltage at the desired level.

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