Datasheet LTC1625 (Analog Devices) - 4

LTC1625
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Input Voltage, Efficiency vs Input Voltage, Efficiency vs Load Current V V OUT = 5V OUT = 3.3V
100 100 100 FIGURE 1 CIRCUIT FIGURE 1 CIRCUIT BURST 95 I 95 LOAD = 2A 90 MODE OPERATION ILOAD = 2A CONTINUOUS MODE 90 90 80 ILOAD = 200mA 85 85 ILOAD = 200mA 70 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 80 80 60 VIN = 10V 75 75 VOUT = 5V EXTVCC = VOUT 50 70 70 0.001 0.01 0.1 1 10 0 5 10 15 20 25 30 0 5 10 15 20 25 30 LOAD CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1625 G01 1625 G02 1625 G02
VIN – VOUT Dropout Voltage Load Regulation I vs Load Current TH Pin Voltage vs Load Current
0 3.0 400 FIGURE 1 CIRCUIT FIGURE 1 CIRCUIT FIGURE 1 CIRCUIT VIN = 20V VOUT = 5V – 5% DROP 2.5 V – 0.05 OUT = 5V 300 2.0 – 0.10 CONTINUOUS (mV) (%) (V) MODE 1.5 OUT 200 OUT ITHV – V ∆V –0.15 INV 1.0 Burst Mode 100 – 0.20 OPERATION 0.5 – 0.25 0 0 0 1 2 3 4 5 0 1 2 3 4 5 6 7 0 1 2 3 4 5 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 1625 G04 1625 G05 1625 G06
Input and Shutdown Current EXTVCC Switch Drop vs Input Voltage INTV vs INTV CC Load Regulation CC Load Current
1000 50 0 500 EXTVCC OPEN SHUTDOWN CURRENT ( 800 40 – 0.5 400 µA) (mV) 600 30 –1.0 CC 300 (%) SHUTDOWN CC – INTV 400 20 ∆INTV –1.5 CC 200 INPUT CURRENT ( µA) EXTV 200 10 EXTV – 2.0 100 CC = 5V 0 0 – 2.5 0 0 5 10 15 20 25 30 35 0 10 20 30 40 50 0 10 20 30 40 50 INPUT VOLTAGE (V) INTV INTV CC LOAD CURRENT (mA) CC LOAD CURRENT (mA) 1625 G07 1625 G08 1625 G09 4