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MAX1709 Fiches technique(PDF) 4 Page - Maxim Integrated Products |
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MAX1709 Fiches technique(HTML) 4 Page - Maxim Integrated Products |
4 / 12 page Note 1: Output voltage is specified at 1A switch current ISW, which is equivalent to approximately 1A ✕ (VIN / VOUT) of load current. Note 2: Load regulation is measured by forcing specified switch current and straight-line calculation of change in output voltage in external feedback mode. Note that the equivalent load current is approximately ISW ✕ (VIN / VOUT). Note 3: Until undervoltage lockout is reached, the device remains in startup mode. Do not apply full load until this voltage is reached. Note 4: Startup is tested with Figure 1’s circuit. Output current is measured when both the input and output voltages are applied. Note 5: Minimum operating voltage. The MAX1709 is bootstrapped and will operate down to a 0.7V input once started. Note 6: Supply current is measured from the OUT pin to the output voltage (+3.3V). This correlates directly with actual input supply current but is reduced in value according to the step-up ratio and efficiency. Note 7: ONA and ONB inputs have approximately 0.15V hysteresis. Note 8: Guaranteed by design, not production tested. Note 9: Specifications to -40°C are guaranteed by design, not production tested. 4A, Low-Noise, High-Frequency, Step-Up DC-DC Converter 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (continued) (VOUT = VCLK = +3.6V, ONA = ONB = FB = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 9) PARAMETER CONDITIONS MIN TYP MAX UNITS ONA, ONB, 3.3/5, 1.2V < VOUT < 5.5V 0.2 × VOUT V Input Low Level (Note 7) CLK, 2.7V < VOUT < 5.5V 0.2 × VOUT ONA, ONB, 3.3/5, 1.2V < VOUT < 5.5V 0.8 × VOUT Input High Level CLK, VOUT = 5.5V 0.8 × VOUT V Logic Input Current ONA, ONB, CLK, 3.3/5 1 µA Internal Oscillator Frequency 500 700 kHz Maximum Duty Cycle 80 95 % External Clock Frequency Range 350 1000 kHz CLK/SEL Pulse Width (Note 8) 100 ns CLK/SEL Rise/Fall Time (Note 8) 50 ns |
Numéro de pièce similaire - MAX1709 |
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Description similaire - MAX1709 |
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