• 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 Pre-biased Output Loads
• Regulators are 180° Out of Phase
• LM26420-Q0: AEC-Q100 Grade 0 (Q0) Qualified (TJ = –40°C to 150°C) LM26420-Q1: AEC-Q100 Grade 1 (Q1) Qualified (TJ = –40°C to 125°C)
• Compliant with CISPR25 Class 5 Conducted Emissions

• 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
• Automotive Camera, Infotainment, and Clusters

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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.