LM26420XSQ/NOPB

The LM26420 regulator is a monolithic, high - efficiency dual PWM step - down DC/DC converter. This device has the ability to drive two 2 - A loads with an internal 75 - mΩ PMOS top switch and an internal 50 - mΩ NMOS bottom switch using state - of - the - art BICMOS technology results in the best power density available. The world - class control circuitry allow on times as low as 30 ns, thus supporting exceptionally high - frequency conversion over the entire 3 - V to 5.5 - V input operating range down to the minimum output voltage of 0.8 V. Although the operating frequency is high, efficiencies up to 93% are easy to achieve. External shutdown is included, featuring an ultra - low standby current. The LM26420 utilizes current - mode control and internal compensation to provide high performance regulation over a wide range of operating conditions.

Applications

• Local 5 V to Vcore of FPGAs
• Core Power in HDDs and Set - Top Boxes
• USB Powered Devices
• Powering Core and I/O Voltages for CPUs and ASICs

Key features

• Compliant with CISPR25 Class 5 Conducted Emissions
• Input Voltage Range of 3 V to 5.5 V
• Output Voltage Range of 0.8 V to 4.5 V
• 2 - A Output Current per Regulator
• High Switching Frequency: 2.2 MHz (LM26420X), 0.55 MHz (LM26420Y)
• 0.8 V, 1.5% Internal Voltage Reference
• Internal Soft Start
• Independent Power Good and Precision Enable for Each Output
• Current Mode, PWM Operation
• Thermal Shutdown
• Overvoltage Protection
• Start - up into Prebiased Output Loads
• Regulators are 180° Out of Phase
• Create a Custom Design Using the LM26420 With the WEBENCH Power Designer