LM2734Z

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

V_{IN...............vvv..} -0.5V to 24V
SW Voltage ..........66-0.5V to 24V
Boost Voltage.......... -0.5V to 30V
Boost to SW Voltage...... -0.5V to 6.0V
FB Voltage ...........-0.5V to 3.0V
EN Voltage .......-0.5V to (V_IN + 0.3V)
Junction Temperature ........150°C
ESD Susceptibility (Note 2) .......2kV
Storage Temp. Range -...65°C to 150°C
Soldering Information
Infrared/Convection Reflow (15sec) .220°C
Wave Soldering Lead Temp. (10sec) .260°C

The LM2734Z regulator is a monolithic, high frequency, PWM step-down DC/DC converter assembled in a 6-pin Thin SOT23 and LLP non pull back package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components and online design support through WEBENCH^® ™, the LM2734Z is easy to use. The ability to drive 1A loads with an internal 300m NMOS switch using state-of-the-art 0.5m BiCMOS technology results in the best power density available. The world class control circuitry allows for on-times as low as 13ns, thus supporting exceptionally high frequency conversion over the entire 3V to 20V input operating range down to the minimum output voltage of 0.8V. Switching frequency is internally set to 3MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 85% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30nA. The LM2734Z utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection.