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MAX1921EUT25 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX1921EUT25 Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 11 page Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23 _______________________________________________________________________________________ 3 100 0 0.1 1 10 100 1000 EFFICIENCY vs. LOAD CURRENT (VOUT = 3.3V) 20 LOAD CURRENT ( mA) 40 60 80 70 50 30 10 90 VIN = 3.6V VIN = 4.2V VIN = 5V 100 0 0.1 1 10 100 1000 EFFICIENCY vs. LOAD CURRENT (VOUT = 2.5V) 20 LOAD CURRENT ( mA) 40 60 80 70 50 30 10 90 VIN = 2.7V VIN = 3.3V VIN = 5V 100 0 0.1 1 10 100 1000 EFFICIENCY vs. LOAD CURRENT (VOUT = 1.5V) 20 LOAD CURRENT ( mA) 40 60 80 70 50 30 10 90 VIN = 2.5V VIN = 3.3V VIN = 5V 3.201 3.234 3.267 3.300 3.333 3.366 3.399 0 100 50 150 200 250 300 350 400 OUTPUT VOLTAGE ACCURACY vs. LOAD (VOUT = 3.3V) LOAD (mA) VIN = 3.6V VIN = 5V VIN = 4.2V 2.425 2.450 2.475 2.500 2.525 2.550 2.575 0 100 50 150 200 250 300 350 400 OUTPUT VOLTAGE ACCURACY vs. LOAD (VOUT = 2.5V) LOAD (mA) VIN = 3V VIN = 5V 1.455 1.470 1.485 1.500 1.515 1.530 1.545 0 100 50 150 200 250 300 350 400 OUTPUT VOLTAGE ACCURACY vs. LOAD (VOUT = 1.5V) LOAD (mA) VIN = 5V VIN = 3.3V VIN = 2.5V Typical Operating Characteristics (CIN = 2.2µF ceramic, Circuit of Figure 1, components of Table 1, unless otherwise noted.) ELECTRICAL CHARACTERISTICS (continued) (VIN = 3.6V, SHDN = IN, TA = 0°C to +85°C. Typical parameters are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Low-Side Current Limit ILIMN 350 550 800 mA High-Side On-Resistance RONHS ILX = -40mA, VIN = 3V 0.6 1.1 Ω Rectifier On-Resistance RONSR ILX = 40mA, VIN = 3V 0.5 0.9 Ω Rectifier Off-Current Threshold ILXOFF 60 mA LX Leakage Current ILXLEAK IN = SHDN = 5.5V, LX = 0 to IN 0.1 5.0 µA LX Reverse Leakage Current ILXLKR IN unconnected, VLX = 5.5V, SHDN = GND 0.1 5.0 µA Minimum On-Time tON(MIN) 0.28 0.4 0.5 µs Minimum Off-Time tOFF(MIN) 0.28 0.4 0.5 µs Note 1: All devices are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design. |
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