Datasheet LTC1877 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | High Efficiency Monolithic Synchronous Step-Down Regulator |
| 页数 / 页 | 18 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Switch Leakage vs Temperature. … |
| 文件格式/大小 | PDF / 246 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Switch Leakage vs Temperature. Switch Leakage vs Input Voltage. Burst Mode Operation
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LTC1877
TYPICAL PERFORMANCE CHARACTERISTICS Switch Leakage vs Temperature Switch Leakage vs Input Voltage Burst Mode Operation
1400 16 VIN = 10V RUN = 0V RUN = 0V 1200 14 SW 12 5V/DIV 1000 MAIN SWITCH 10 800 VOUT SYNCHRONOUS 20mV/DIV 8 SWITCH AC COUPLED 600 6 400 SWITCH LEAKAGE (nA) SYNCHRONOUS SWITCH LEAKAGE (nA) 4 I SWITCH L 200mA/DIV 200 2 MAIN SWITCH 0 0 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 1877 G14 10μs/DIV TEMPERATURE (°C) INPUT VOLTAGE (V) VIN = 5V L = 10μH VOUT = 1.5V COUT = 47μF 1877 G12 1877 G13 CIN = 10μF ILOAD = 50mA
Start-Up from Shutdown Load Step Response
RUN VOUT 5V/DIV 50mV/DIV AC COUPLED VOUT 1V/DIV IL 500mA/DIV IL 500mA/DIV ITH 1V/DIV 1877 G15 50μs/DIV 1877 G16 40μs/DIV VIN = 5V CIN = 10μF VIN = 5V CIN = 10μF VOUT = 1.5V COUT = 47μF VOUT = 1.5V COUT = 47μF L = 10μH ILOAD = 500mA L = 10μH ILOAD = 50mA TO 500mA PULSE-SKIPPING MODE
Load Step Response Load Step Response
VOUT VOUT 50mV/DIV 50mV/DIV AC COUPLED AC COUPLED IL 10M 10 s/DIV M IL 500mA/DIV 500mA/DIV ITH ITH 1V/DIV 1V/DIV 1877 G17 40μs/DIV 1877 G18 20μs/DIV VIN = 5V CIN = 10μF VIN = 5V CIN = 10μF VOUT = 1.5V COUT = 47μF VOUT = 1.5V COUT = 47μF L = 10μH ILOAD = 50mA TO 500mA L = 10μH ILOAD = 200mA TO 500mA Burst Mode OPERATION PULSE-SKIPPING MODE 1877fb 5
TYPICAL PERFORMANCE CHARACTERISTICS Switch Leakage vs Temperature Switch Leakage vs Input Voltage Burst Mode Operation
1400 16 VIN = 10V RUN = 0V RUN = 0V 1200 14 SW 12 5V/DIV 1000 MAIN SWITCH 10 800 VOUT SYNCHRONOUS 20mV/DIV 8 SWITCH AC COUPLED 600 6 400 SWITCH LEAKAGE (nA) SYNCHRONOUS SWITCH LEAKAGE (nA) 4 I SWITCH L 200mA/DIV 200 2 MAIN SWITCH 0 0 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 1877 G14 10μs/DIV TEMPERATURE (°C) INPUT VOLTAGE (V) VIN = 5V L = 10μH VOUT = 1.5V COUT = 47μF 1877 G12 1877 G13 CIN = 10μF ILOAD = 50mA
Start-Up from Shutdown Load Step Response
RUN VOUT 5V/DIV 50mV/DIV AC COUPLED VOUT 1V/DIV IL 500mA/DIV IL 500mA/DIV ITH 1V/DIV 1877 G15 50μs/DIV 1877 G16 40μs/DIV VIN = 5V CIN = 10μF VIN = 5V CIN = 10μF VOUT = 1.5V COUT = 47μF VOUT = 1.5V COUT = 47μF L = 10μH ILOAD = 500mA L = 10μH ILOAD = 50mA TO 500mA PULSE-SKIPPING MODE
Load Step Response Load Step Response
VOUT VOUT 50mV/DIV 50mV/DIV AC COUPLED AC COUPLED IL 10M 10 s/DIV M IL 500mA/DIV 500mA/DIV ITH ITH 1V/DIV 1V/DIV 1877 G17 40μs/DIV 1877 G18 20μs/DIV VIN = 5V CIN = 10μF VIN = 5V CIN = 10μF VOUT = 1.5V COUT = 47μF VOUT = 1.5V COUT = 47μF L = 10μH ILOAD = 50mA TO 500mA L = 10μH ILOAD = 200mA TO 500mA Burst Mode OPERATION PULSE-SKIPPING MODE 1877fb 5