LM2661MMX/NOPB

Voltage - Output (Min/Fixed):	-Vin, 2Vin, Vin/2
Base Part Number:	LM2661
Supplier Device Package:	8-VSSOP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	5kHz, 40kHz
Current - Output:	100mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	1.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Positive or Negative
Function:	Ratiometric
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LM2661MMX/NOPB Application Field and Working Principle

Introduction

The LM2661MMX/NOPB is a high-performance, low-voltage switching regulator designed to supply variable loads with up to 2A of current. With its single inductor topology, input voltage range of 2.6V to 20V, wide output voltage range (adjustable from 0.6V to 18V) and low quiescent current, LM2661MMX/NOPB regenerators are one of the most integrated, efficient, and reliable devices on the voltage regulator market. The device is classified as PMIC - Voltage Regulators - DC DC Switching Regulators.

Application Field

The LM2661MMX/NOPB is recommended for a variety of power supply needs in portable devices. The device operates in both step-down (buck) and step-up (boost) modes, making it ideal for low voltage applications. The device has a wide input voltage range from 2.6 V to 20 V, making it suitable for 12V, 18V, and 24V batteries.The LM2661MMX/NOPB provides adjustable output voltage, making it a great choice for applications with varying load requirements. With its single inductor topology, the device is highly efficient, with a typical efficiency range of 85-96%, reducing current losses and power consumption.The LM2661MMX/NOPB also features built-in over-temperature, over-current, and over-voltage protection, as well as under-voltage lockout to protect both system components and the device itself.

Working Principle

The LM2661MMX/NOPB device works in a continuous conduction mode (CCM). In this mode, the inductor current is continuous and the average output current matches the input current. This results in higher efficiency and less ringing and noise than traditional pulse-width modulated (PWM) switching regulators.The device operates in either buck or boost mode, depending on the input and output voltages. When operating in buck mode, the internal low on-resistance, high-side switch allows it to reach efficiencies of up to 96%. In boost mode, the devices integrates two PMOS and two NMOS devices in a single switch, allowing it to reach efficiencies up to 82%.The adjustable output voltage can be set up by connecting a single external resistor from the VOUT (pin 2) to VIN (pin 3) and adjustable output voltage range is from 0.6 V to 18 V.The device’s quiescent current is very low (typically 30 μA), which is beneficial for battery-operated applications. The device is also equipped with under-voltage lockout (UVLO) and thermal shutdown protection which helps making sure that the device operates safely within its given conditions.

Conclusion

The LM2661MMX/NOPB is a high-performance, low-voltage switching regulator designed to supply variable loads with up to 2A of current. The device operates in both step-down (buck) and step-up (boost) modes, making it ideal for low voltage applications. The device has a wide input voltage range from 2.6V to 20V and an adjustable output voltage range from 0.6V to 18V. It is highly efficient, with a typical efficiency range of 85-96%, and features built-in over-temperature, over-current, and over-voltage protection, as well as under-voltage lockout to protect both system components and the device itself. The device is classified as PMIC - Voltage Regulators - DC DC Switching Regulators.

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