TL5001CPS

Frequency - Switching:	20kHz ~ 500kHz
Base Part Number:	TL5001
Supplier Device Package:	8-SO
Package / Case:	8-SOIC (0.209", 5.30mm Width)
Operating Temperature:	-20°C ~ 85°C (TA)
Control Features:	Dead Time Control, Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	3.6 V ~ 40 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck, Boost, Flyback
Output Configuration:	Positive
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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TL5001CPS Application Field and Working Principle

The TL5001CPS is a low power, simple tailed PWM DC/DC controller is suited for a variety of space or weight-sensitive applications. The PWM output can be used to directly regulate input voltage to a higher output voltage, or connected in buck or boost configuration with an external output switch to regulate an external voltage.

Application Field

The TL5001CPS offers constant switching frequency, a 1% accurate duty cycle and adjustable current limit. The device can be used to drive low power buck converters, boost converters and inverters. It can also be used in linear regulators and DC-DC power converters. The small size makes it suitable for space sensitive applications such as laptop computers, cell phones, tablets and other portable devices.

Features

The TL5001CPS offers a wide range of features, such as:

• 2.5 to 6.0 V adjustable output voltage
• Integrated low-side power MOSFET
• 30 mA of output current
• Adjustable over-current protection
• Adjustable switching frequency up to 500 kHz
• Adjustable soft-start
• Internal pull-down transistors
• Low power operation

Working Principle

The TL5001CPS is an example of a dual-mode switching regulator. It is designed to regulate an output voltage from a given input voltage. It operates by adjusting its output voltage using a proportional-integral (PI)-type feedback loop.The key components of the TL5001CPS are a power MOSFET, a pulse-width modulator (PWM) and a feedback-enabled compensation network. The MOSFET acts as a switch, connecting and disconnecting the output voltage from the input voltage. The PWM adjusts the duty cycle of the switch, which in turn adjusts the output voltage. The compensation network utilizes feedback from the output voltage to establish a stable voltage regulation loop.The TL5001CPS has four main operating modes: continuous conduction mode (CCM), discontinuous conduction mode (DCM), forced continuous conduction mode (FCCM), and Burst Mode. In CCM and DCM, the MOSFET operates in an on-off switch mode, while in FCCM and in Burst Mode, the MOSFET operates in an open-drain mode. In each of these modes, the duty cycle of the switch is adjusted to regulate the output voltage.

Conclusion

The TL5001CPS is a versatile low-power, simple-tailed PWM DC/DC controller ideal for space or weight-sensitive applications. Its wide range of features, including adjustable output voltage, current limit, switching frequency and soft-start, make it suitable for powering buck converters, boost converters, inverters linear regulators, and DC/DC converters. The feedback-enabled compensation network ensures stable output voltage regulation, and its four operating modes provide a wide range of design flexibility.

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