Datasheet LTC4126 (Analog Devices) - 7

LTC4126
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. DC/DC Switching Frequency vs DC/DC Switching Frequency in DC/DC Switching Frequency in Battery Voltage 3:1 Mode vs Temperature 2:1 Mode vs Temperature
90 52 76 51 75 75 50 74 49 73 60 48 72 45 47 71 2:1 MODE 46 70 FREQUENCY (kHz) 30 FREQUENCY (kHz) 45 FREQUENCY (kHz) 69 3:1 STEP–DOWN MODE 44 68 15 VBAT = 3.5V VBAT = 3.8V 43 67 VBAT = 4.4V VBAT = 3.1V 0 42 66 3 3.3 3.6 3.9 4.2 4.5 –20 –5 10 25 40 55 70 85 –20 –5 10 25 40 55 70 85 VBAT (V) TEMPERATURE (°C) TEMPERATURE (°C) 4126 G13 4126 G14 4126 G19
BAT No-Load Quiescent Current BAT Quiescent Current DC/DC Output Transient Response (DC/DC On) vs Battery Voltage (DC/DC Off) vs Temperature to Load Step
30 6.0 40 50 VCC = 0V 25 5.5 20 40 LOAD CURRENT (mA) 3:1 STEP-DOWN MODE 20 5.0 0 30 (REGULATED) 3:1 MODE 15 (OPEN 4.5 –20 20 LOOP) CURRENT (µA) 10 CURRENT (µA) 4.0 (AC-COUPLED) (mV) –40 10 2:1 MODE VBAT = 3.1V V OUT 5 V 3.5 BAT = 3.8V –60 0 VBAT = 4.4V V I OUT OUT = 0 COUT = 2.2µF LOAD CURRENT 0 3.0 –80 –10 3 3.3 3.6 3.9 4.2 4.5 –20 –5 10 25 40 55 70 85 TIME (800µs/DIV) VBAT (V) TEMPERATURE (°C) 4126 G18 4126 G16 4126 G17 Rev. 0 For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts