LMR24220

LMR24220 SIMPLE SWITCHER® 42Vin, 2.0A Step-Down Voltage Regulator in micro SMD October 5, 2011 LMR24220 SIMPLE SWITCHER® 42Vin, 2.0A Step-Down Voltage Regulator in micro SMD Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Input voltage range of 4.5V to 42V Output voltage range of 0.8V to 24V Output current up to 2.0A Integrated low RDS(ON) synchronous MOSFETs for high efficiency Up to 1 MHz switching frequency Low shutdown Iq, 25 µA typical Programmable soft-start No loop compensation required COT architecture with ERM 28 bump micro SMD (2.45 x 3.64 x 0.60 mm) packaging Fully enabled for WEBENCH®™ Power Designer System Performance Efficiency vs Load Current (VOUT = 3.3V) 100 90 EFFICIENCY (%) 80 70 60 50 40 0.0 VIN = 4.5V VIN = 9V VIN = 12V VIN = 24V VIN = 42V 0.4 0.8 1.2 1.6 LOAD CURRENT (A) 2.0 30167670 Performance Benefits ■ Tiny overall solution reduces system cost ■ Integrated synchronous MOSFETs provides high efficiency at low output voltages ■ COT with ERM architecture requires no loop compensation, reduces component count, and provides ultra fast transient response ■ Stable with low ESR capacitors VOUT Regulation vs Load Current (VOUT = 3.3V) 0.8 0.6 0.4 ΔVOUT (%) 0.2 0.0 -0.2 -0.4 -0.6 -0.8 0.0 0.4 0.8 1.2 1.6 LOAD CURRENT (A) 2.0 30167671 Applications ■ ■ ■ ■ Point-of-Load Conversions from 5V, 12V and 24V Rails Space Constrained Applications Industrial Distributed Power Applications Power Meters VIN = 4.5V VIN = 9V VIN = 12V VIN = 24V VIN = 42V SIMPLE SWITCHER® is a register...