Datasheet LTC1771 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 10µA Quiescent Current High Efficiency Step-Down DC/DC Controller |
| 页数 / 页 | 16 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Active Mode Quiescent Current. Sleep … |
| 文件格式/大小 | PDF / 243 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS. Active Mode Quiescent Current. Sleep Quiescent Current. Load Regulation. vs Input Voltage
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LTC1771
W U TYPICAL PERFOR A CE CHARACTERISTICS Active Mode Quiescent Current Sleep Quiescent Current Load Regulation vs Input Voltage vs Input Voltage
0.4 200 12 FIGURE 1 CIRCUIT µA) 0.2 T Burst Mode OPERATION A = 100°C µA) 10 TA = 100°C DISABLED 150 0 TA = 25°C VIN = 15V 8 TA = –50°C TA = 25°C –0.2 (%) TA = –50°C Burst Mode 100 6 OUT VIN = 5V –0.4 ∆V OPERATION ENABLED 4 –0.6 50 2 –0.8 SLEEP QUIESCENT CURRENT ( ACTIVE MODE QUIESCENT CURRENT ( –1.0 0 0 0 0.5 1.0 1.5 2.0 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 10 12 14 16 18 20 LOAD CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1771 G04 1771 G05 1771 G06
Shutdown Quiescent Current Current Sense Voltage vs Input Voltage Run/SS Current vs Input Voltage vs Temperature
8 5 200 VIN = 10V µA) TA = –50°C MAXIMUM 4 150 6 µA) TA = –50°C 3 100 4 TA = 25°C BURST THRESHOLD 2 T 50 A = 25°C 2 T SOFT-START CURRENT ( A = 100°C 1 CURRENT SENSE VOLTAGE (mV) 0 MINIMUM SHUTDOWN QUIESCENT CURRENT ( TA = 100°C 0 0 –50 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 10 12 14 16 18 20 –50 –25 0 25 50 75 100 INPUT VOLTAGE (V) INPUT VOLTAGE (V) TEMPERATURE (°C) 1771 G07 1771 G08 1771 G09
Reference Voltage vs Temperature Load Step Transient Response Burst Mode Operation
1.25 VIN = 10V V V OUT OUT 50mV/DIV 1.24 100mV/DIV 1.23 INDUCTOR INDUCTOR CURRENT CURRENT 1A/DIV 0.5A/DIV REFERENCE VOLTAGE (V) 1.22 VIN = 10V 50µs/DIV 1771 G11 VIN = 10V 10µs/DIV 1771 G12 VOUT = 3.3V VOUT = 3.3V I I 1.21 LOAD = 100mA TO 2A LOAD = 100mA –50 –25 0 25 50 75 100 FIGURE 1 CIRCUIT FIGURE 1 CIRCUIT TEMPERATURE (°C) 1771 G10 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Active Mode Quiescent Current Sleep Quiescent Current Load Regulation vs Input Voltage vs Input Voltage
0.4 200 12 FIGURE 1 CIRCUIT µA) 0.2 T Burst Mode OPERATION A = 100°C µA) 10 TA = 100°C DISABLED 150 0 TA = 25°C VIN = 15V 8 TA = –50°C TA = 25°C –0.2 (%) TA = –50°C Burst Mode 100 6 OUT VIN = 5V –0.4 ∆V OPERATION ENABLED 4 –0.6 50 2 –0.8 SLEEP QUIESCENT CURRENT ( ACTIVE MODE QUIESCENT CURRENT ( –1.0 0 0 0 0.5 1.0 1.5 2.0 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 10 12 14 16 18 20 LOAD CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1771 G04 1771 G05 1771 G06
Shutdown Quiescent Current Current Sense Voltage vs Input Voltage Run/SS Current vs Input Voltage vs Temperature
8 5 200 VIN = 10V µA) TA = –50°C MAXIMUM 4 150 6 µA) TA = –50°C 3 100 4 TA = 25°C BURST THRESHOLD 2 T 50 A = 25°C 2 T SOFT-START CURRENT ( A = 100°C 1 CURRENT SENSE VOLTAGE (mV) 0 MINIMUM SHUTDOWN QUIESCENT CURRENT ( TA = 100°C 0 0 –50 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 10 12 14 16 18 20 –50 –25 0 25 50 75 100 INPUT VOLTAGE (V) INPUT VOLTAGE (V) TEMPERATURE (°C) 1771 G07 1771 G08 1771 G09
Reference Voltage vs Temperature Load Step Transient Response Burst Mode Operation
1.25 VIN = 10V V V OUT OUT 50mV/DIV 1.24 100mV/DIV 1.23 INDUCTOR INDUCTOR CURRENT CURRENT 1A/DIV 0.5A/DIV REFERENCE VOLTAGE (V) 1.22 VIN = 10V 50µs/DIV 1771 G11 VIN = 10V 10µs/DIV 1771 G12 VOUT = 3.3V VOUT = 3.3V I I 1.21 LOAD = 100mA TO 2A LOAD = 100mA –50 –25 0 25 50 75 100 FIGURE 1 CIRCUIT FIGURE 1 CIRCUIT TEMPERATURE (°C) 1771 G10 4