Datasheet LTC3446 (Analog Devices) - 6

LTC3446
Typical perForMance characTerisTics Buck PMOS Switch On-Resistance Buck NMOS Switch On-Resistance
200 200 180 180 160 160 ANCE (mΩ) ANCE (mΩ) 140 140 120 120 PMOS RESIST VIN = 2.7V NMOS RESIST VIN = 2.7V 100 VIN = 3.6V 100 VIN = 3.6V VIN = 4.2V VIN = 4.2V VIN = 5.5V VIN = 5.5V 80 80 –45 –20 5 30 55 80 105 130 –45 –20 5 30 55 80 105 130 TEMPERATURE (°C) TEMPERATURE (°C) 3446 G13 3446 G14
Buck Transient Response with Buck Transient Response with Burst Mode Defeated Burst Mode Enabled
BUCK OUTPUT BUCK OUTPUT VOLTAGE VOLTAGE 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED 500mA 500mA LOAD LOAD CURRENT CURRENT 50mA 50mA 100µs/DIV 3446 G15 100µs/DIV 3446 G16 FRONT PAGE APPLICATION CIRCUIT FRONT PAGE APPLICATION CIRCUIT
VLDO Rejection of Buck DC/DC VLDO Transient Response Burst Mode Ripple
VLVIN = BUCK VOUT VLDO OUTPUT 20mV/DIV VOLTAGE AC-COUPLED 20mV/DIV AC-COUPLED VLVOUT 10mV/DIV 300mA AC-COUPLED LOAD CURRENT 2µs/DIV 3446 G18 30mA VLVIN = BUCK VOUT = 1.8V V 100µs/DIV 3446 G17 IN = 4.2V VLVOUT = 1.5V LVOUT = 1.5V OR 1.2V ILVOUT = 50mA FRONT PAGE APPLICATION CIRCUIT CLVOUT = 2.2µF 3446ff 6 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts