L6933H1.2

Current - Quiescent (Iq):	400µA
PSRR:	75dB (120Hz)
Control Features:	Enable, Power Good
Protection Features:	Over Temperature, Short Circuit
Operating Temperature:	-25°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Supplier Device Package:	8-HSO
Base Part Number:	L6933
Series:	--
Packaging:	Tube
Part Status:	Obsolete
Output Configuration:	Positive
Output Type:	Adjustable
Number of Regulators:	1
Voltage - Input (Max):	14V
Voltage - Output (Min/Fixed):	1.2V
Voltage - Output (Max):	5V
Voltage Dropout (Max):	--
Current - Output:	2A

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The portfolio of PMIC (Power Management IC) is vast, with wide array of choices in areas such as Voltage Regulators, Energy Management, Interface-level Control and System Monitoring. For many consumer and industrial applications, Linear Voltage Regulators offer a simple solutions to managing the power needs. The L6933H1.2 is an excellent example of a 2 A fixed-output linear regulator with integrated low-dropout capabilities.

Features of L6933H1.2

The device is designed around an advanced low-power CMOS process and is specifically intended to replace bulky diode-conducted solutions requiring little energy. The L6933H1.2 is available in a small but functional 10-pin MSOP surface-mount package, also known as PowerSO-10. The features of this particular voltage regulator include:

• Dropout voltage: 310 mV at I_out = 2 A
• 2 A constant current
• Low stand-by power (no current draw when not in use)
• Logic input control
• Small form factor
• Output voltage accuracy: ±2%
• Low startup current
• Thermal shutdown
• Undervoltage lockout

Application Fields for L6933H1.2

The L6933H1.2 is a particularly suitable voltage regulator for use in medium power supply designs, with its 2 A output current rating allowing for multiple applications. Applications fields for the device include low-power logic systems, industrial and automotive control systems, battery-powered mobile telecommunications equipment, PC motherboards and server systems, as well as LCD display screens and LED lighting. The small form factor and low power consumption makes the product particularly attractive to space and power-hungry applications alike.

Operating Principle

The L6933H1.2 is a low dropout linear regulator, meaning that it is designed to operate at a low input-output differential voltage of 310 mV at a 2 A output current. It works on the principle of controlling the amount of current that is allowed to flows from the input to the output based on the voltage differential between them. By controlling the voltage difference, the output voltage is therefore controlled. The device is equipped with a number of features for error detection, thermal protection and undervoltage lockout. An internal error amplifier senses the output voltage and compares it to the internally set voltage reference. This provides the voltage regulation function, allowing the device to work with a wide range of input and output voltages. The thermal shutdown feature prevents overheating of the device by shutting down the device if the temperature exceeds the preset threshold. The undervoltage lockout feature prevents the device from being started up when the input voltage is lower than the preset level.

Conclusion

The L6933H1.2 is an excellent example of a medium power linear voltage regulator with low dropout capabilities. Its integrated features like logic Input Control, Thermal Shutdown, Undervoltage Lockout and its small form factor, makes it an ideal choice for multiple applications in medium power supply designs.

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