Datasheet LT1938 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 25V, 2.2A, 2.8MHz Step-Down Switching Regulator |
| 页数 / 页 | 24 / 6 — TYPICAL PERFORMANCE ChARACTERISTICS (TA = 25°C unless otherwise noted). … |
| 文件格式/大小 | PDF / 271 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE ChARACTERISTICS (TA = 25°C unless otherwise noted). Minimum Input Voltage. VC Voltages
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LT1938
TYPICAL PERFORMANCE ChARACTERISTICS (TA = 25°C unless otherwise noted) Minimum Input Voltage VC Voltages Power Good Threshold
6.5 2.50 1.200 PG RISING 6.0 2.00 1.180 CURRENT LIMIT CLAMP 5.5 TAGE (V) 1.50 TAGE (V) 1.160 TAGE (V) 5.0 1.00 1.140 INPUT VOL SWITCHING THRESHOLD V THRESHOLD VOL THRESHOLD VOL 4.5 OUT = 5V T 0.50 1.120 A = 25°C L = 4.7µH f = 800kHz 4.0 0 1.100 0.001 0.01 0.1 1 10 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 LOAD CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 1938 G19 1938 G20 1938 G21
Switching Waveforms Switching Waveforms (Discontinuous Operation) (Continuous Operation)
IL IL 0.5A/DIV 0.5A/DIV VSW VSW 5V/DIV 5V/DIV VOUT V 10mV/DIV OUT 10mV/DIV VIN = 12V, FRONT PAGE APPLICATION VIN = 12V, FRONT PAGE APPLICATION ILOAD = 140mA ILOAD = 1A 1938 G22 1µs/DIV 1938 G23 1µs/DIV 1938fa 6 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL ChARACTERISTICS TYPICAL PERFORMANCE ChARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS
TYPICAL PERFORMANCE ChARACTERISTICS (TA = 25°C unless otherwise noted) Minimum Input Voltage VC Voltages Power Good Threshold
6.5 2.50 1.200 PG RISING 6.0 2.00 1.180 CURRENT LIMIT CLAMP 5.5 TAGE (V) 1.50 TAGE (V) 1.160 TAGE (V) 5.0 1.00 1.140 INPUT VOL SWITCHING THRESHOLD V THRESHOLD VOL THRESHOLD VOL 4.5 OUT = 5V T 0.50 1.120 A = 25°C L = 4.7µH f = 800kHz 4.0 0 1.100 0.001 0.01 0.1 1 10 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 LOAD CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 1938 G19 1938 G20 1938 G21
Switching Waveforms Switching Waveforms (Discontinuous Operation) (Continuous Operation)
IL IL 0.5A/DIV 0.5A/DIV VSW VSW 5V/DIV 5V/DIV VOUT V 10mV/DIV OUT 10mV/DIV VIN = 12V, FRONT PAGE APPLICATION VIN = 12V, FRONT PAGE APPLICATION ILOAD = 140mA ILOAD = 1A 1938 G22 1µs/DIV 1938 G23 1µs/DIV 1938fa 6 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL ChARACTERISTICS TYPICAL PERFORMANCE ChARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS