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.
For all available packages, see the orderable addendum at the end of the data sheet.
Qualified for Automotive Applications
AEC Q100-Qualified With the Following Results:
Device Temperature Grade 0 (Q0): –40°C to +150°C Ambient Operating Temperature Range
Device Temperature Grade 1 (Q1): –40°C to +125°C Ambient Operating Temperature Range
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
