TPS728185295YZUT

Current - Output:	200mA
Base Part Number:	TPS728185295
Supplier Device Package:	5-DSBGA (1x1.37)
Package / Case:	5-UFBGA, DSBGA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	65dB ~ 40dB (100Hz ~ 100kHz)
Current - Supply (Max):	120µA
Current - Quiescent (Iq):	80µA
Series:	--
Voltage Dropout (Max):	0.4V @ 200mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.85V, 2.95V
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

TPS728185295YZUT is Texas Instrument’s high current, low dropout linear regulator with a dropout of only 175mV (at 250mA). This voltage regulator has low quiescent current and can support up to 1.5A output current without external components. It has a wide input voltage range (1.40V to 5.5V) and is specifically designed for battery-powered applications.

Application field

TPS728185295YZUT can be used in a variety of applications such as cellular/femtocell base stations, wireless LAN/GPS devices, routers/gateways, point-of-sales terminals and industrial instruments. It has low quiescent current and can support battery life from 20 hours to 6 months depending on the application. In addition, it can simplify the power system design for these applications since only two external components are required compared to costlier multi-phase solutions.

Working principle

TPS728185295YZUT uses a linear regulator principle in which the output voltage is regulated by the difference between the input and output voltages. The device uses an internal P-channel MOSFET, a control circuit and a reference voltage to maintain a constant output voltage. When the output voltage is below the reference voltage, the error amplifier increases the gate voltage of the P-channel MOSFET and the MOSFET conductivity increases. This provides a path for current flow from the input to the output, which increases the output voltage. When the output voltage reaches the reference voltage, the gate voltage of the MOSFET is reduced and it goes into a low impedance cut-off state. The increased gate voltage also increases the power consumption at the input and this is how the linear regulator principle works.

Conclusion

In conclusion, TPS728185295YZUT is a high current, low dropout linear regulator designed for use in battery-powered applications. It has a wide input voltage range and low quiescent current, making it an ideal solution for applications requiring long battery life and high output current. Additionally, it requires only two external components, making it simple to use and cost-effective. Understanding the principles behind its operation helps designers make the best use of this voltage regulator in their applications.

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