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LM22670MRE-ADJ Spanningsregelaar 3A SIMPLE SWITCHER PSOP-8

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€ 3,50

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Step-Down Voltage Regulator with Synchronization or Adjustable Switching Frequency

Wide input voltage range: 4.5V to 42V
■ Internally compensated voltage mode control
■ Stable with low ESR ceramic capacitors

■ Precision enable pin
■ Integrated boot diode
■ Integrated soft-start
■ Fully WEBENCH® enabled
■ Step-down and inverting buck-boost applications

LM22670MRE-ADJ Spanningsregelaar 3A SIMPLE SWITCHER  PSOP-8

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The LM22670 series of regulators are monolithic integrated
circuits which provide all of the active functions for a stepdown (buck) switching regulator capable of driving up to 3A
loads with excellent line and load regulation characteristics.
High efficiency (>90%) is obtained through the use of a low
ON-resistance N-channel MOSFET. The series consists of a
fixed 5V output and an adjustable version.
The SIMPLE SWITCHER® concept provides for an easy to
use complete design using a minimum number of external
components and National’s WEBENCH® design tool.
National’s WEBENCH® tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in. The switching
clock frequency is provided by an internal fixed frequency oscillator which operates at 500 kHz. The switching frequency
can also be adjusted with an external resistor or synchronized
to an external clock up to 1MHz. It is also possible to selfsynchronize multiple regulators to share the same switching
frequency. The LM22670 series also has built in thermal shutdown, current limiting and an enable control input that can
power down the regulator to a low 25 µA quiescent current
standby condition.

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