LM2734ZMK/NOPB Integrated Circuits (ICs)

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LM2734ZMK/NOPB Application Field and Working Principle

The LM2734ZMK/NOPB is a comprehensive ultra-low quiescent current (IQ) DC/DC step-down regulator that performs many of the power functions required in industrial, automotive and consumer electronic applications. This cost-effective, featured packed device reduces cost and complexity by providing single chip solutions for many power-supply related applications. At its heart is an adaptive on-time, peak current mode control. LM2734ZMK/NOPB simplifies design and supports low output voltages from 0.6V to 12V.

LM2734ZMK/NOPB is a member of the LM2734 family of ultra-low quiescent current DC/DC step-down regulators. It is designed to provide a cost-effective, single-chip solution for power requirements corresponding to those of applications such as LED lighting, smart phones, and tablet PCs. This regulator features an integrated FET, output voltage setting synchronization, programmable current limit, and output voltage range of 0.6V to 12V, enabling optimal switching of small output voltages.

The LM2734ZMK/NOPB is a member of the LM2734 family of ultra-low quiescent current DC/DC step-down regulators. It is designed to provide a cost-effective, single-chip solution for power requirements corresponding to those of applications such as LED lighting, smart phones, and tablet PCs. This regulator features an integrated FET, output voltage setting synchronization, programmable current limit, and output voltage range of 0.6V to 12V, enabling optimal switching of small output voltages.

The LM2734ZMK/NOPB belongs to the PMIC (Power Management Integrated Circuit) product group in the Voltage Regulators and DC/DC Switching Regulators product families. It is a comprehensive ultra-low quiescent current (IQ) DC/DC step-down regulator. It reduces cost and complexity by providing single chip solutions for many power-supply related applications. It features an adaptive on-time, peak current mode control, internal startup circuitry, and an 8-pin TSSOP-8 package.

The simplicity and flexibility of the LM2734ZMK/NOPB\'s peak current mode architecture allows for very fast transient response, resulting in low output voltage ripple. It provides excellent line and load transient response, low output noise and stability with a wide range of external components. The input voltage can be up to 25V, but you can also configure it to work with just 3.3V. It features internal PWM voltage control, adjustable current limit, and synchronizable switching frequency.

The LM2734ZMK/NOPB has an adaptive on-time control which enables fast and abrupt transitions with simplistic FET gate control resulting in faster response and better efficiency. Its adaptive on-time control also automatically adjusts the on-time based on the output voltage, input voltage, and the inductor current. This all results in lower peak inductor current and, in turn, lower EMI and improved efficiency. In some states of voltage, current, and load conditions, the LM2734ZMK/NOPB automatically reduces the switching frequency. The LM2734ZMK/NOPB also has a built-in over-current protection that shuts down the device and prevents output short circuit.

The LM2734ZMK/NOPB includes inherent thermal shutdown, overtemperature protection (OTP), and undervoltage lockout (UVLO). The device’s OTP feature is exceptionally helpful in protecting the device from thermal runaway. The device also acts as an optimized soft-start by keeping the VOUT in regulation as it ramps up. The device also has a sedentary sleep mode, in which no switching takes place and the FET is disabled. This feature contributes to the device’s extremely low quiescent current (IQ).

The LM2734ZMK/NOPB is suitable for various applications, such as industrial automation and control, automotive, and consumer electronics. It is designed to directly drive a variety of loads, including relatively noisy high current strands of LEDs, and always provides clean, regulated power with very low power consumption even in extreme battery conditions.

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