Datasheet LTC1879 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 1.2A Synchronous Step-Down Regulator with 15µA Quiescent Current |
| 页数 / 页 | 20 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. Load Step. Load Step (Burst Mode … |
| 文件格式/大小 | PDF / 268 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS. Load Step. Load Step (Burst Mode Operation). (Pulse Skipping Mode)
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LTC1879
W U TYPICAL PERFOR A CE CHARACTERISTICS Load Step Load Step (Burst Mode Operation) (Pulse Skipping Mode) Soft-Start with Shorted Output
IL IL 1A/DIV 1A/DIV IVIN 500mA/DIV RUN/SS V V OUT OUT 1V/DIV 100mV/DIV 100mV/DIV 50µs/DIV 1879 G15 50µs/DIV 1879 G16 5ms/DIV 1879 G19 V V IN = 5V CIN = 20µF IN = 5V CIN = 20µF VIN = 5V CIN = 20µF V V OUT = 2.5V COUT = 47µF OUT = 2.5V COUT = 47µF VOUT = 0V COUT = 47µF L = 4.7µH I L = 4.7 LOAD = 50mA to 1200mA µH ILOAD = 50mA to 1200mA L = 4.7µH ILOAD = 0A
Burst Mode Operation Pulse Skipping Mode Operation
IL I 200mA/DIV L 200mA/DIV VOUT VOUT 50mV/DIV 20mV/DIV SW SW 5V/DIV 5V/DIV 25µs/DIV 1879 G18 2.5µs/DIV 1879 G17 VIN = 5V CIN = 20µF VIN = 5V CIN = 20µF VOUT = 2.5V COUT = 47µF VOUT = 2.5V COUT = 47µF L = 4.7µH ILOAD = 15mA L = 4.7µH ILOAD = 15mA 1879f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS Load Step Load Step (Burst Mode Operation) (Pulse Skipping Mode) Soft-Start with Shorted Output
IL IL 1A/DIV 1A/DIV IVIN 500mA/DIV RUN/SS V V OUT OUT 1V/DIV 100mV/DIV 100mV/DIV 50µs/DIV 1879 G15 50µs/DIV 1879 G16 5ms/DIV 1879 G19 V V IN = 5V CIN = 20µF IN = 5V CIN = 20µF VIN = 5V CIN = 20µF V V OUT = 2.5V COUT = 47µF OUT = 2.5V COUT = 47µF VOUT = 0V COUT = 47µF L = 4.7µH I L = 4.7 LOAD = 50mA to 1200mA µH ILOAD = 50mA to 1200mA L = 4.7µH ILOAD = 0A
Burst Mode Operation Pulse Skipping Mode Operation
IL I 200mA/DIV L 200mA/DIV VOUT VOUT 50mV/DIV 20mV/DIV SW SW 5V/DIV 5V/DIV 25µs/DIV 1879 G18 2.5µs/DIV 1879 G17 VIN = 5V CIN = 20µF VIN = 5V CIN = 20µF VOUT = 2.5V COUT = 47µF VOUT = 2.5V COUT = 47µF L = 4.7µH ILOAD = 15mA L = 4.7µH ILOAD = 15mA 1879f 5