LM22677QTJE-ADJ/NOPB

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The LM22677QTJE-ADJ/NOP is a family of advanced high-efficiency switching regulators that can be used in a wide range of applications, ranging from portable environmental control systems to complex industrial power supplies. These switching regulators feature a positive error amplifier with a single resistor for the reference voltage point and use a two-stage architecture for low noise and fast transient response. Additionally, the LM22677QTJE-ADJ/NOP features an adjustable output voltage from 4V to 60V and typical operating efficiency up to 95%.

The LM22677QTJE-ADJ/NOP is a part of the PMIC Voltage Regulators DC DC Switching Regulators family, and its working principle is based on the Pulse Width Modulation (PWM) technique. A PWM signal is generated, whose duty cycle is modulated according to the input feedback signal, to keep the output voltage at the desired level. The LM22677QTJE-ADJ/NOP\'s PWM signal is generated by a high speed comparator with hysteresis and feed-forward current limit. The hysteretic feedback loop works to reduce instability caused by external noise and circuit variations, while the feed-forward loop limits the switching current. Once generated, the PWM signal is used to drive a MOSFET switch, which then drives the inductor and output capacitor, to regulate the output voltage.

The LM22677QTJE-ADJ/NOP features an adjustable switching frequency from 250kHz to 1.2MHz, allowing designers to optimize efficiency for the required application. The device also features current mode control and integrates built-in over-current protection, under-voltage detection, thermal shutdown, and output overload protection, helping to ensure that the device will operate safely under all conditions. The input voltage range of the LM22677QTJE-ADJ/NOP is 4.75V to 32V, making it suitable for a wide range of applications.

The LM22677QTJE-ADJ/NOP is ideal for applications that require high power efficiency and low noise operation, such as LED backlighting, USB portable power, handheld wireless communications and communications infrastructure. The device is offered in the 5 lead TSOT-23 package, making it a cost-effective solution for these applications.

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