- Input voltage range of 3.0V to 5.5V
- The output voltage range is 0.8V to 4.5V
- 2.0A output per output current
- High switching frequency
- 0.55MHz（LM26420Y）
- 75mΩPMOS switch
- 50MΩNMOS switch
- 0.8V, 1.5% internal reference voltage
- Internal soft start
- Each output is powered independently of the good
- Independent precision enables each output
- Current mode, PWM operation
- Thermal shutdown
- Overvoltage protection
- Boot into a prebiased output load
- The output is 180° out of phase
illustrate
The regulator LM26420 is a monolithic, high frequency, dual PWM step-down DC/DC converter in 16-pin LLP and 20-pin eTSSOP packages. It offers all the positive features, providing fast transient response and precise adjustment of local DC/DC conversion with minimal PCB area. With minimal external components, the LM26420 is easy to use. Capable of driving a 75mΩ internal PMOS top switch and an internal 50MΩNMOS switch on the bottom using advanced equipment, the best power density technology of the 0.5 micron BiCMOS process provides two 2.0A loads. World-class control circuitry achieves chip multiples to a low 30ns to support very high output voltages that are reduced to a minimum of 0.8V over the entire conversion 3V to 5.5V input operating voltage range. The switching frequency is internally set to 550 kHz or 2.2 MHz, allowing the use of very small surface mount inductors and chip capacitors. Even at high operating frequencies, efficiencies of up to 93% are easily achievable. External shutdown is included with ultra-low standby current. The LM26420 adopts functions such as current mode control and internal compensation, and is highly stable in a wide range of operating conditions. Other features include internal soft-start circuitry to reduce inrush current, pulse-pass pulse current limiting, thermal shutdown, power good indicator, precision enable, and overvoltage protection output.
apply
- Local 5V to core voltage buck converter
- Power at the core of the hard drive
- Stb
- USB powered devices
- DSL modem
- Core power and I/O voltage for FPGAs, CPLDs and ASICs
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