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SP7651ER-L/TR Datasheet(PDF) 3 Page - Sipex Corporation |
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SP7651ER-L/TR Datasheet(HTML) 3 Page - Sipex Corporation |
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3 / 15 page  3 Rev J: 3/4/07 SP765 Wide Input Voltage Range 3A, 900kHz, Buck Regulator © Copyright 2007 Sipex Corporation ELECTRICAL CHARACTERISTICS Unless otherwise specified: -40°C < TAMB < 85°C, -40°C<Tj<125°C, 4.5V < VCC < 5.5V, 3V<Vin<20V, BST=LX + 5V, LX = GND = 0.0V, UVIN = 3.0V, CVCC = µF, CCOMP = 0.µF, CSS = 50nF, Typical measured at VCC = 5V. The • denotes the specifications which apply over the full temperature range, unless otherwise specified. PARAMETER MIN. TYP. MAX. UNITS CONDITIONS CONTROL LOOP: PWM COMPARATOR, RAMP & LOOP DELAY PATH Ramp Amplitude 0.92 . .28 V RAMP Offset . V TA = 25°C, RAMP COMP until GH starts Switching RAMP Offset Temp. Coefficient -2 mV/°C GH Minimum Pulse Width 90 80 ns • Maximum Controllable Duty Ratio 92 97 % Maximum Duty Ratio Measured just before pulsing begins Maximum Duty Ratio 00 % Valid for 20 cycles Internal Oscillator Ratio 80 900 990 kHz • TIMERS: SOFTSTART SS Charge Current: 0 µA SS Discharge Current: mA • Fault Present, SS = 0.2V PROTECTION: Short Circuit & Thermal Short Circuit Threshold Voltage 0.2 0.25 0.3 V • Measured Vref (0.8V) - VFB Hiccup Timeout 200 ms Vfb = 0.5V Number of Allowable Clock Cycles at 100% Duty Cycle 20 Cycles Minimum GL Pulse After 20 Cycles 0.5 Cycles Vfb = 0.7V Thermal Shutdown Temperature 45 °C Vfb = 0.7V Thermal Recovery Temperature 35 °C Thermal Hysteresis 0 °C OUTPUT: POWER STAGE High Side Rdson 40 mΩ Vcc = 5V ; Iout = 3A Tamb = 25°C Synchronous FET Rdson 40 mΩ Vcc = 5V ; Iout = 3A Tamb = 25°C Maximum Output Current 3 A |
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