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MAX1643EUA-T Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX1643EUA-T Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 12 page High-Efficiency, Step-Up DC-DC Converters for 1V Inputs _______________________________________________________________________________________ 3 Note 2: Start-up guaranteed by correlation to measurements of device parameters (i.e., switch on-resistance, on-times, off-times, and output voltage trip points). Note 3: . This guarantees discontinuous conduction. Note 4: Specifications to -40°C are guaranteed by design, not production tested. t = t x V V - V x RATIO OFF ON BATT OUT BATT Falling PFI, hysteresis = 1% VBATT = 1.0V (MAX1642) 0.9V < VBATT < 1.5V (tON = K / VBATT) VOUT = 3.5V (MAX1642) VOUT = 3.3V VFB < 0.1V External feedback VOUT = 3.5V VOUT = 3.3V CONDITIONS mV 550 662 PFI Trip Voltage µA 3.5 ISHDN,BATT Shutdown Current into BATT µA 1 ISHDN,OUT Shutdown Current into OUT µA 6.5 IQBATT Quiescent Current into BATT µA 18 IQOUT Quiescent Current into OUT V-µs 12.4 38.2 K On-Time Constant Ω 2.2 P-Channel On-Resistance V 2.99 3.56 VOUT Output Voltage V 1.11 1.32 VFB FB Set Voltage Ω 1.5 N-Channel On-Resistance UNITS MIN MAX SYMBOL PARAMETER ELECTRICAL CHARACTERISTICS (VBATT = VSHDN = 1.3V, ILOAD = 0mA, FB = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 4) Falling VBATT, VOUT = 3.3V, hysteresis = 2% (MAX1643) V 0.93 1.06 BATTLO Trip Voltage __________________________________________Typical Operating Characteristics (Circuit of Figure 4, VBATT = 1.2V, R1 + R2 = 1MΩ, TA = +25°C, unless otherwise noted.) 0 0.01 1 10 0.1 100 EFFICIENCY vs. OUTPUT CURRENT (VOUT = 2.4V) 10 OUTPUT CURRENT (mA) VIN = 1.6V L1 = 100 µH SUMIDA CD54-101 VIN = 1.2V VIN = 0.85V VIN = 1.0V 20 30 40 50 60 70 80 90 100 0 0.01 1 10 0.1 100 EFFICIENCY vs. OUTPUT CURRENT (VOUT = 2.4V) 10 OUTPUT CURRENT (mA) VIN = 1.6V L1 = 150 µH TDK NLC565050T-151K VIN = 1.2V VIN = 0.85V VIN = 1.0V 20 30 40 50 60 70 80 90 100 0 0.01 1 10 0.1 100 EFFICIENCY vs. OUTPUT CURRENT (VOUT = 3.3V) 10 OUTPUT CURRENT (mA) VIN = 1.6V L1 = 100 µH SUMIDA CD54-101 VIN = 1.2V VIN = 0.85V VIN = 1.0V 20 30 40 50 60 70 80 90 100 |
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