MIC49300-1.2BR TR

Voltage Dropout (Max):	0.4V @ 3A
Base Part Number:	MIC49300
Supplier Device Package:	S-PAK-5
Package / Case:	SPak-5 (5 leads + Tab)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	--
Current - Output:	3A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.2V
Voltage - Input (Max):	6.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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MIC49300-1.2BR TR Application Field and Working Principle
PMIC – Voltage Regulators – LinearThe MIC49300-1.2BR TR is a member of the standard and extended-temperature operation family of 20-V switch mode power supply (SMPS) regulators from Micrel. This device is suitable for a wide range of applications from 0.9-V to 5.5-V. It is capable of supplying up to 3.8 A of output current with a very low quiescent current of 130 µA and a maximum standby current of 32 µA.The MIC49300-1.2BR TR provides a compact, low profile solution optimized for small size with its 5 mm × 5 mm QFN package. The device is protected by undervoltage lockout (UVLO) and cycle-by-cycle current-limit protection. The MIC49300-1.2BR TR is also an efficiency-optimized device with its high-frequency switching modes and integrated power switch.The application field of the MIC49300-1.2BR TR includes but not limited to: wired/wireless communication infrastructure, routers, base transceiver stations, telecom, wide area networks, distributed base band routers, WiMAX, set-top boxes, point-of-sale terminals, digital video recorders, networking and automotive.Given its linear-like regulation, the MIC49300-1.2BR TR is a linear voltage regulator (LVR) suitable for automotive, industrial and communications applications in environments with wide temperature range and low output current needs. This type of regulator requires relatively simple, straightforward circuitry to achieve the desired output voltage.The main working principle behind the MIC49300-1.2BR TR is a closed loop voltage regulator circuit. A fixed reference voltage is applied to the non-inverting input of an operational amplifier. The differential voltage between the output terminal and the inverting input of the operational amplifier is then amplified, thus forming a closed loop circuit. The output terminal is then adjusted to compensate for variations in input voltage, load current, and temperature.Notable features of the MIC49300-1.2BR TR include precision output voltage, excellent accuracy with a 0.2%, and a wide temperature range of -40°C to 125°C. It is also a low dropout (LDO) regulator with a low-noise and a fast transient response. Additionally, the device includes an output voltage range as low as 0.9 V, a maximum output current of 3.8 A, and an adjustable output of 1.2 to 5.5 V.The MIC49300-1.2BR TR is designed to maximize power efficiency and conserve the valuable board space. The device is optimized for improved transient response and reduced EMI, providing a lower total system cost. With its wide temperature range, high ripple rejection, and fast start-up time, the MIC49300-1.2BR TR is a solid choice for high-precision linear voltage regulators.

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