LM26420XSQX

• Input voltage range from 3.0V to 5.5V
• The output voltage range is 0.8V to 4.5V
• 2.0A output current, each output
• High switching frequency

• 2.2MHz (LM26420X)

• 0.55MHz（LM26420Y）
• 75mΩ PMOS switch
• 50MΩ NMOS switch
• 0.8V, 1.5% internal reference voltage
• Internal soft start
• The independent power supply for each output is good
• Independent precision to make each output
• Current mode, PWM operation
• Thermal shutdown
• Overvoltage protection
• Start into the pre-biased output load
• The output is 180° out of phase

illustrate

LM26420 regulator is a monolithic high-frequency, dual PWM step-down DC/DC converter in a 16-pin LLP and 20-pin eTSSOP package. It offers all the positive features, providing fast transient response and precise adjustment of local DC/DC conversion in the smallest possible PCB area. LM26420 are minimal external elements and easy to use. The driver internal 75 mOhm PMOS top switch and internal 50MΩ NMOS bottom switch use the country's most advanced 0.5 micron BiCMOS process technology in the best power density result of two 2.0A load capabilities. The world-class control circuitry allows for a time as low as 30ns, thus supporting very high slewing frequencies with a minimum output voltage of 0.8V over the entire input voltage range of 3V to 5.5V. Internally set to a switching frequency of 550 kHz or 2.2 MHz, it allows for the use of very small surface-mount inductors and capacitors. Even at high operating frequencies, efficiency of up to 93% is easy to achieve. Includes external shutdown with ultra-low standby current. LM26420 current mode control and internal compensation provide a wide range of operating conditions high-performance regulation. Other features include an internal soft-start circuit to reduce inrush current, pulse through pulse current limiting, thermal shutdown, good power condition indicator, precision enablement, and output overvoltage protection.

apply

• Local 5V Vcore step-down converter
• At the heart of the hard drive
• Stb
• USB-powered devices
• DSL modem
• The power supply core and I/O voltages are FPGA, CPLD and ASIC