TPS40051PWPG4

Frequency - Switching:	500kHz
Base Part Number:	TPS40051
Supplier Device Package:	16-HTSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, Frequency Control, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	94%
Series:	--
Voltage - Supply (Vcc/Vdd):	8 V ~ 40 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Not For New Designs
Packaging:	Tube

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TPS40051PWPG4 Application Field and Working Principle

Introduction to TPS40051PWPG4

TPS40051PWPG4 is a high performance, advanced synchronous buck controller which CAN operate at high input supply voltage and current. It is designed with fully integrated gate drivers, step-up controller, digital control logic and other building blocks to control step down buck converters working at high switching frequencies with current mode control. It is the right choice for digital power system designs due to its integrated digital interface allowing precise computer control of power system output voltage and current during operation.

Application Fields of TPS40051PWPG4

The TPS40051PWPG4 is widely used in application areas such as X86 and ARM Microprocessors, FPGA and ASIC, Cellular Base Station, Automotive, and DSP/microcontroller Core Power Supply. By using this device user can achieve improved efficiency and cost savings. The device can be used for both High efficiency and low component count power supply design.

Working Principle of TPS40051PWPG4

The TPS40051PWPG4 contains TWO integrated gate drivers, pulse density modulation and pulse width modulation modes of operation. It operates in fixed-frequency current mode to provide a highly regulated output voltage with fast response, low ripple and minimal output load current variation. This device consists of two main building blocks: The PWM controller and the PWM modulator (pulse density modulator). The PWM controller works in fixed frequency current mode, in order to control the duty cycle (D), the output voltage (EOUT)and the switching frequency(SF) of the converters. The PWM modulator (pulse density modulator) is an analog circuitry that modulates the pulses of the PWM controller in order to deliver the output voltage at a certain frequency, which is set by the user.The PWM controller also features protection features, it consists of an under voltage lock out (UVLO), an output over-current protection (OCP) circuit, an under voltage protection circuit (UVP), a temperature protection circuit (TCP) and a cycle-by-cycle current limit.

Conclusion

The TPS40051PWPG4 is a highly advanced, high performance voltage regulator ideal for digital power system designs. It provides a low component count and high efficiency power supply design. With its integrated digital interface, precise computer control of the output voltage and current is possible. Its various protection features help protect the device as well as other components connected to it.

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