L149H

Current - Output:	4A
Base Part Number:	L149
Supplier Device Package:	5-PENTAWATT
Package / Case:	Pentawatt-5 (Horizontal, Bent and Staggered Leads)
Mounting Type:	Through Hole
Operating Temperature:	--
Protection Features:	Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	--
Current - Quiescent (Iq):	400µA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	--
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	--
Output Configuration:	--
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The L149H is a linear voltage regulator that operates with an input voltage of up to 16V and provides a regulated output voltage of 5V with a maximum output current of 1.5A. It has a wide temperature range of -40°C to +85°C. This makes it suitable for a range of applications such as automotive, industrial, and consumer.

Application Field

The L149H is suitable for applications that require a regulated 5V output with a wide input voltage and temperature range. It is often used for powering associated power management ICs (PMICs) found in automotive, industrial, and consumer electronics. Its wide temperature range also makes it suitable for use in outdoor and extreme temperature applications.Additionally, the L149H\'s fast-acting response time and low dropout voltage of only 1V at 1A load make it an excellent choice for low power applications such as Wi-Fi, Bluetooth, and Zigbee modules. The L149H also has built-in overcurrent protection and thermal shutdown to protect against potential damage from overload or thermal events.

Working Principle

The L149H linear voltage regulator converter works by using a linear voltage regulator to reduce the input voltage to the required regulated 5V output. The input voltage is first dropped across an internal series resistor, and then the voltage is regulated by the internal linear regulator. This ensures a steady output voltage despite any fluctuations in the input voltage.The L149H also offers current limiting and thermal shutdown features that protect the device from overload and thermal events. The current limit function limits the output current to 800mA, while the thermal shutdown feature shuts down the regulator when temperatures reach 135°C.

Conclusion

The L149H is a linear voltage regulator that operates with an input voltage of up to 16V and provides a regulated output voltage of 5V with a maximum output current of 1.5A. Its wide temperature range of -40°C to +85°C and fast-acting response time make it suitable for a range of applications such as automotive, industrial, and consumer. It also offers current limiting and thermal shutdown features that protect the device from overload and thermal events.

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