S-1167A15-M5T1U Integrated Circuits (ICs)

Current - Output:	150mA
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	Over Current
Control Features:	Enable
PSRR:	70dB (1kHz)
Current - Supply (Max):	16µA
Current - Quiescent (Iq):	900nA
Series:	S-1167
Voltage Dropout (Max):	0.58V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.5V
Voltage - Input (Max):	6.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The S-1167A15-M5T1U is a 3-phase step-down DC-DC synchronous buck converter that utilizes a proprietary architecture to deliver 24V at up to 15A and includes an additional feature that allows for current sensing for accurate power limit control and improved thermal capability. This device is a linear voltage regulator and is used to convert a higher input voltage to a lower output voltage, in accordance with a defined voltage regulation profile. This profile is determined by resistances connected between the input voltage and the output voltage and the amount of current, typically referred to as load or output current, flowing from the output to input.

S-1167A15-M5T1U Applications

The S-1167A15-M5T1U is used in a wide range of applications, including network infrastructure equipment, automotive electronics, industrial equipment, and consumer products. It is an ideal choice for system designs which require the combination of high power density, efficiency and high current accuracy.To meet the wide range of requirements in different applications, the S-1167A15-M5T1U is available in two versions – one with a fixed output voltage and one with a variable output voltage. The fixed version is pre-programmed with a specific output voltage for specific power requirements, while the variable version can be programmed by the user to achieve a desired voltage level based on their requirements.

Working Principle

The S-1167A15-M5T1U provides excellent current accuracy over a wide load range. It utilizes a FET and an optimized inductor to achieve an efficient voltage conversion. During the switching operation, energy is stored in the inductor when the FET is switched on and released when the FET is switched off. The output voltage is monitored and regulated by an internal voltage regulator. As the load current increases, the voltage regulator senses the higher current requirement and increases the switching frequency of the device to provide the additional current required. The S-1167A15-M5T1U is capable of operating at switching frequencies as high as 1.1MHz with a wide input-to-output differential of up to 24V.

Conclusion

The S-1167A15-M5T1U is a 3-phase step-down DC-DC synchronous buck converter with an additional feature for current sensing. It is capable of delivering 24V at up to 15A with excellent current accuracy over a wide range. The S-1167A15-M5T1U is used in a wide range of applications, including network infrastructure equipment, automotive electronics, industrial equipment, and consumer products. The working principle of this device is based on the switches, an optimized inductor and an internal voltage regulator. Its switching frequency is adjustable to provide the additional current required depending on the load.

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