LM3151MH-3.3/NOPB

Frequency - Switching:	250kHz
Base Part Number:	LM3151
Supplier Device Package:	14-HTSSOP
Package / Case:	14-TSSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	SIMPLE SWITCHER®
Voltage - Supply (Vcc/Vdd):	6 V ~ 42 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction

PMIC stands for Power Management Integrated Circuit (IC). It is a integrated device used to provide power supply control and voltage regulation in a single IC package. Voltage Regulators and DC to DC Switching Controllers are common PMICs. The LM3151MH-3.3/NOPB is a DC to DC switching controller device that provides a wide range of voltage regulation and power management capabilities in a single IC package.

Application Field

The LM3151MH-3.3/NOPB is ideally suited for use in applications where space and power are a premium, such as portable devices and handheld applications. This can include personal digital assistants (PDAs), laptop/notebook computers, and digital cameras. The flexible architecture also makes the LM3151MH-3.3/NOPB suitable for use in desktop and server computers, LCD monitors, and network hubs, switches and routers.In addition, the LM3151MH-3.3/NOPB can be used in low voltage (3.3V) and high current load applications, such as in battery charging, DDR memory power supplies and storage applications. The device is also capable of providing smooth, noiseless power conversion even in demanding switch-mode environments, as it is designed to provide high power density, low losses, and fast transient response.

Features and Benefits

The LM3151MH-3.3/NOPB offers some fantastic features, benefits and advantages which clearly set the device apart from other DC to DC controllers:

• High Conversion Efficiency: The LM3151MH-3.3/NOPB can achieve power conversion efficiency of up to 95% due to its high-efficiency architecture, fast switching transistors and integrated load current sensing.
• Polarity Protection: The LM3151MH-3.3/NOPB has input protection circuitry from a reverse-connected input source, making it suitable for a wide variety of applications with different power requirements.
• Programmable Regulation: The LM3151MH-3.3/NOPB comes with programmable regulation parameters that allow the user to configure the output voltage and current limits according to their specific requirements.
• Synchronous Rectification: The LM3151MH-3.3/NOPB features internal synchronous rectification, providing higher efficiency and better thermal performance compared to previous designs.
• High Reliability: The LM3151MH-3.3/NOPB has an absolute maximum operating junction temperature of 125 °C, making it a highly reliable power management device for use in a wide range of applications and environments.

Working Principle

The LM3151MH-3.3/NOPB works on the principle of voltage regulation. Voltage regulation is the process of maintaining a constant voltage across the output of a power supply while varying the load. When the load is increased, the DC to DC controller outputs more current, thereby maintaining the output voltage. The LM3151MH-3.3/NOPB is an output regulated DC-DC controller, which means it also has two independent control pins, operating in either a dual edge mode, or single edge mode. In dual edge mode, the two control pins work in opposite cycles, to increase the resolution of the output voltage level. The LM3151MH-3.3/NOPB has fast switching MOSFETs, current sense MOSFETs, and an internal synchronous rectifier for increased efficiency. Additionally, the device includes input protection circuitry from a reverse-connected input source. The LM3151MH-3.3/NOPB is also capable of operating over a wide input voltage range of 4-24V.

Conclusion

The LM3151MH-3.3/NOPB is a DC to DC switching controller that is designed to provide efficient, high-performance, low-cost and reliable power source in a variety of applications. Its high conversion efficiency and programmable regulation parameters enable the user to configure the output voltage and current limits according to the specific requirements of their application. The device also achieves low heat dissipation and low losses, making it ideal for industries where power and space are a premium.

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