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MAX17551 Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX17551 Datasheet(HTML) 4 Page - Maxim Integrated Products |
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4 / 20 page  (VIN = 24V, VGND = 0V, VOUT = 3.3V, VFB = 0.85V, VEN/UVLO = 1.5V, RT/SYNC = 191kΩ, LX = SS = MODE = RESET = unconnected; TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to GND, unless otherwise noted.) (Note 3) Note 2: Actual IQ-PFM in the application circuit is higher due to additional current in the output voltage feedback resistor divider. For example, IQ-PFM (MODE = unconnected) = 26µA for Figure 6, 22µA for Figure 7, and 78µA for Figure 11. Note 3: Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS RESET FB Threshold for RESET Rising VFB-OKR VFB rising 93 95 97 % FB Threshold for RESET Falling VFB-OKF VFB falling 90 92 94 % RESET Delay after FB Reaches 95% Regulation 2.1 ms RESET Output Level Low IRESET = 1mA 0.23 V RESET Output Leakage Current VFB = 1.01 x VFB-REG, TA = +25°C 1 µA MODE MODE PFM Threshold VMODE-PFM 1 1.22 1.44 V MODE Hysteresis VMODE-HYS 0.19 V MODE Internal Pullup Resistor VMODE = unconnected 123 kΩ VMODE = GND 1390 THERMAL SHUTDOWN Thermal-Shutdown Threshold Temperature rising 160 °C Thermal-Shutdown Hysteresis 20 °C MAX17551 60V, 50mA, Ultra-Small, High-Efficiency Synchronous Step-Down DC-DC Converter with 22µA No-Load Supply Current www.maximintegrated.com Maxim Integrated │ 4 Electrical Characteristics (continued) |
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