LM4132CMFX-1.8/NOPB

Noise - 0.1Hz to 10Hz:	170µVp-p
Base Part Number:	LM4132
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Current - Supply:	100µA
Voltage - Input:	2.2 V ~ 5.5 V
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	20ppm/°C
Tolerance:	±0.2%
Current - Output:	20mA
Voltage - Output (Min/Fixed):	1.8V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction The LM4132CMFX-1.8/NOPB is a Programmable Micropower Quasi-Resistor (PMQR) designed by Texas Instruments, and belongs to the class of power management integrated circuits (PMICs) applications, specifically as a Voltage Reference. The LM4132CMFX-1.8/NOPB is a voltage reference that employs a very low quiescent current, thus allowing it to be used in very low power applications such as Class 2 low voltage power supplies, memories caches and VCOs. The LM4132CMFX-1.8/NOPB has a wide operating temperature range of -40°C to +125°C, and its input voltage range is 2.5V to 5.5V.Application FieldThe LM4132CMFX-1.8/NOPB is particularly advantageous in Class 2 low voltage power supplies, memories caches, and VCOs. It is also used in other PMICs such as the LM2931CMFX-3.3/NOPB, which is a 5V 1A Linear Regulator, and the LM3804CMFX-5.0/NOPB, which is a 500mA-4A Low Dropout (LDO) Regulator. Furthermore, it can be used in systems requiring a reference voltage, such as LCD displays, mobile phones and medical devices.Working Principle The LM4132CMFX-1.8/NOPB uses a circuit topology which is a Quasi-Resistor. This circuit topology has two essential components, one of which is the NPN transistor and the other is the N-Channel MOSFET. The NPN transistor is used as a reference voltage source, while the N-Channel MOSFET is used as a switch in order to control the output. The circuit operates in the following 3 modes: 1. Off Mode: In this mode, the switch is off and the reference voltage is isolated from the output voltage.2. Low Impedance (Linear) Mode: In this mode, the switch turns on, and the output voltage tracks the reference voltage, with very low output impedance.3. High Impedance (Pulse) Mode: In this mode, the switch turns on and off periodically, creating a high impedance output which maintains the reference voltage, while allowing much higher frequency signal voltage than would normally be possible with the low impedance mode.ConclusionThe LM4132CMFX-1.8/NOPB is a power management integrated circuit (PMIC) designed by Texas Instruments, and is used as a voltage reference to provide a stable reference voltage source to a variety of systems. The LM4132CMFX-1.8/NOPB uses a circuit topology which is a Quasi-Resistor, with two essential components, a NPN transistor and a N-Channel MOSFET. The circuit operates in the Off, Low Impedance (Linear) and High Impedance (Pulse) modes. It is particularly advantageous in Class 2 low voltage power supplies, memories caches, and VCOs.

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