Datasheet LTC1735-1 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | High Efficiency Synchronous Step-Down Switching Regulator |
| Pages / Page | 28 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Efficiency vs Load Current (3 … |
| File Format / Size | PDF / 356 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Efficiency vs Load Current (3 Operating Modes). Efficiency vs Load Current
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Text Version of Document
LTC1735-1
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Load Current (3 Operating Modes) Efficiency vs Load Current Efficiency vs Input Voltage
100 100 100 EXTVCC OPEN EXTVCC = 5V EXTVCC = 5V 90 VOUT = 1.6V VOUT = 1.6V 90 95 FIGURE 1 BURST 80 VIN = 5V SYNC 80 90 70 I CONT VIN = 15V OUT = 5A 60 70 VIN = 24V 85 IOUT = 0.5A EFFICIENCY (%) 50 EFFICIENCY (%) 60 EFFICIENCY (%) 80 40 VIN = 10V VOUT = 3.3V 50 75 30 RS = 0.01Ω fO = 300kHz 20 40 70 0.001 0.01 0.1 1 10 10mA 100mA 1A 10A 0 5 10 15 20 25 30 LOAD CURRENT (A) LOAD CURRENT (A) INPUT VOLTAGE (V) 1735-1 G01 1735-1 G02 1735-1 G03
VIN – VOUT Dropout Voltage Efficiency vs Input Voltage Load Regulation vs Load Current
100 0 500 EXTV R CC OPEN FCB = 0V SENSE = 0.005Ω V V OUT = 1.6V VIN = 15V OUT = 5V – 5% DROP 95 FIGURE 1 FIGURE 1 400 –0.1 90 (%) IOUT = 5A OUT (mV) 300 85 –0.2 OUT I – V OUT = 0.5A 200 IN EFFICIENCY (%) 80 V NORMALIZED V –0.3 100 75 70 –0.4 0 0 5 10 15 20 25 30 0 2 4 6 8 10 0 2 4 6 8 10 INPUT VOLTAGE (V) LOAD CURRENT (A) LOAD CURRENT (A) 1735-1 G04 1735-1 G05 1735-1 G06
Input and Shutdown Currents EXTVCC Switch Drop vs Input Voltage INTVCC Line Regulation vs INTVCC Load Current
500 100 6 500 1mA LOAD EXTVCC OPEN SHUTDOWN CURRENT ( 5 400 80 400 µA) 4 (mV) 300 60 CC 300 3 VOLTAGE (V) – INTV 200 40 CC CC 200 2 INPUT CURRENT ( µ INTV SHUTDOWN A) EXTV 100 20 100 1 EXTVCC = 5V 0 0 0 0 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 0 10 20 30 40 50 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INTVCC LOAD CURRENT (mA) 1735-1 G07 1735-1 G08 1735-1 G09 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Load Current (3 Operating Modes) Efficiency vs Load Current Efficiency vs Input Voltage
100 100 100 EXTVCC OPEN EXTVCC = 5V EXTVCC = 5V 90 VOUT = 1.6V VOUT = 1.6V 90 95 FIGURE 1 BURST 80 VIN = 5V SYNC 80 90 70 I CONT VIN = 15V OUT = 5A 60 70 VIN = 24V 85 IOUT = 0.5A EFFICIENCY (%) 50 EFFICIENCY (%) 60 EFFICIENCY (%) 80 40 VIN = 10V VOUT = 3.3V 50 75 30 RS = 0.01Ω fO = 300kHz 20 40 70 0.001 0.01 0.1 1 10 10mA 100mA 1A 10A 0 5 10 15 20 25 30 LOAD CURRENT (A) LOAD CURRENT (A) INPUT VOLTAGE (V) 1735-1 G01 1735-1 G02 1735-1 G03
VIN – VOUT Dropout Voltage Efficiency vs Input Voltage Load Regulation vs Load Current
100 0 500 EXTV R CC OPEN FCB = 0V SENSE = 0.005Ω V V OUT = 1.6V VIN = 15V OUT = 5V – 5% DROP 95 FIGURE 1 FIGURE 1 400 –0.1 90 (%) IOUT = 5A OUT (mV) 300 85 –0.2 OUT I – V OUT = 0.5A 200 IN EFFICIENCY (%) 80 V NORMALIZED V –0.3 100 75 70 –0.4 0 0 5 10 15 20 25 30 0 2 4 6 8 10 0 2 4 6 8 10 INPUT VOLTAGE (V) LOAD CURRENT (A) LOAD CURRENT (A) 1735-1 G04 1735-1 G05 1735-1 G06
Input and Shutdown Currents EXTVCC Switch Drop vs Input Voltage INTVCC Line Regulation vs INTVCC Load Current
500 100 6 500 1mA LOAD EXTVCC OPEN SHUTDOWN CURRENT ( 5 400 80 400 µA) 4 (mV) 300 60 CC 300 3 VOLTAGE (V) – INTV 200 40 CC CC 200 2 INPUT CURRENT ( µ INTV SHUTDOWN A) EXTV 100 20 100 1 EXTVCC = 5V 0 0 0 0 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 0 10 20 30 40 50 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INTVCC LOAD CURRENT (mA) 1735-1 G07 1735-1 G08 1735-1 G09 4
