AN7708SP-E1

Current - Output:	1.2A
Base Part Number:	AN7708
Supplier Device Package:	SP-3SUA
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	25°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	--
PSRR:	66dB (120Hz)
Current - Quiescent (Iq):	5mA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	8V
Voltage - Input (Max):	19V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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AN7708SP-E1 application field and working principle

The AN7708SP-E1 is a voltage regulator from the family of linear fixed single output regulators. It is a regulator that offers high performance and low rate of heat dissipation in a space saving package of SOP-8. It offers protection features as overvoltage protection (OVP) and external shutdown (SHDN). It also offers ultra-low dropout via integrated P-channel MOSFETs. It operates between a voltage range of 8V to 24V and provides a fixed output voltage of 5.0V.

Features

The main features of the AN7708SP-E1 include:

• Integrated P-channel MOSFETs for ultra-low dropout
• Overvoltage protection (OVP) and external shutdown (SHDN)
• SOP-8 package for space-saving use
• Fixed output voltage of 5.0V
• Low rate of heat dissipation
• Voltage range of 8V to 24V

Applications

The AN7708SP-E1 is ideal for use in applications that require ultra-low dropout and external shutdown capability. Such applications include power supply systems, network communications, home appliances, industrial machinery and instrumentation.

Working principle

The AN7708SP-E1 is built of a series of voltage regulating circuits. The input voltage is applied to the input capacitor and then applied to an on-chip P-Channel MOSFET which is connected to the ground reference. This P-Channel MOSFET has very low resistance, thus the input voltage drop is minimized. The voltage is then applied to a voltage error amplifier, which is used to compare the output voltage with the reference voltage and form an error signal. This error signal is fed to a voltage feedback circuit, which amplifies it and drives the MOSFET gate voltage. The amplified error signal drives the P-Channel MOSFET and then regulates the output voltage.The output voltage is adjusted by a voltage trim circuit. This circuit uses an adjustable resistance connected to the output pin, which sets the output voltage by slop compensation. The output voltage can be adjusted from 5.0V to 24V.The AN7708SP-E1 also includes a thermal protection circuit which shuts down the device if it detects an internal temperature over the set limit.

Conclusion

The AN7708SP-E1 is a voltage regulator from the family of linear fixed output regulators. It is designed to offer high performance and low rate of heat dissipation in a space saving SOP-8 package. It has features such as overvoltage protection (OVP) and external shutdown (SHDN), making it ideal for use in power supply systems, network communications, home appliances, industrial machinery, and instrumentation. The working principle of the AN7708SP-E1 is based on a series of voltage regulating circuits, including an on-chip P-Channel MOSFET, a voltage error amplifier, and a voltage feedback circuit. It also includes a thermal protection circuit for added reliability.

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