LM25116MHX/NOPB

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Output Type:	Transistor Driver
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Number of Outputs:	1
Output Phases:	1
Voltage - Supply (Vcc/Vdd):	6 V ~ 42 V
Frequency - Switching:	50kHz ~ 1MHz
Duty Cycle (Max):	--
Synchronous Rectifier:	Yes
Clock Sync:	Yes
Serial Interfaces:	--
Control Features:	Enable, Frequency Control, Ramp, Soft Start
Operating Temperature:	-40°C ~ 125°C (TJ)
Package / Case:	20-PowerTSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-HTSSOP
Base Part Number:	LM25116

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Introduction

LM25116MHX/NOPB is a high performance integrated DC/DC switching controller that operates from 2.97V to 30V. It is specially developed by Texas Instruments for multiple application fields. It offers superior efficiency, fast dynamic response and excellent load transient capabilities. The controller also includes multiple protection features ensuring the safety level required for any application. Its well-designed switching regulators, with several delay and timing control, offer a wide operating range of more than 250kHz with high power efficiency and flexibility.

Application Field and Working Principle

LM25116MHX/NOPB is suitable for a range of applications such as Power Supplies, Uninterruptible Power Supplies (UPS), Battery Charger, Point of Load (POL) regulators, Motor Drives, Cut-off Circuits and Step down converters. It is an intelligent controller integrating current mode control, digital power management and DC/DC synchronous buck switching regulators. The integrated architecture reduces the system components count, minimizes power dissipation and provides an optimal solution to any DC/DC power application.The schematic of the LM25116MHX/NOPB consist of a PWM Error Amplifier (EA), a Pulse Width Modulator (PWM), an Internal Voltage Reference, two Comparator and two fast Outputs (RESET & PGOOD).The PWM error amplifier compares the output voltage feedback and reference voltage inputs, and drives a PWL modulator to adjust the switching cycle length. When the desired output voltage is greater than the current output voltage, the PWM output will remain high; when the desired output voltage is lower than the current output voltage, the PWL output will remain low.The internal voltage reference is a precision low-power integrated circuit that provides a stable output voltage of 1V. The voltage reference has excellent temperature stability and impedance stability which greatly reduce the voltage drift. The two comparators have a fast response. these comparator compares the internal feedback voltage with the voltage reference and generates the PWM pulses. The pulse width is controlled by a digital register, while the frequency is indirectly controlled by Rgf resistor and Cgf capacitor. The outputs RESET and PGOOD are used to alert the power supply when the input voltage falls below the specified limits and to inform the output state.

Features and Benefits

LM25116MHX/NOPB is a high performance integrated DC/DC switching controller with a wide operating range from 2.97V to 30V. It provides superior efficiency, fast dynamic response, excellent load transient capabilities, and high power efficiency. The controller also includes multiple protection features ensuring the safety level required for any application.It has programmable top loop compensation that allows for efficient and precise control of the output voltage. It also includes over-current protection, over-temperature protection, and under-voltage lockout protection. The LM25116MHX/NOPB comes with a fast transient response and a high power efficiency which makes it suitable for applications such as PoL, motor drives, and cut-off circuits.

Conclusion

LM25116MHX/NOPB is an integrated DC/DC switching controller from Texas Instruments which is suitable for a wide range of applications. It has a wide operating range from 2.97 V to 30V and provides superior efficiency, fast dynamic response, excellent load transient capabilities and high power efficiency. The controller is an intelligent controller, integrating current mode control, digital power management and DC/DC synchronous buck switching regulators. It also includes multiple protection features ensuring the safety level required for any application. The LM25116MHX/NOPB has top loop compensation that allows for efficient and precise control of the output voltage.

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