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SP7651 Datasheet(PDF) 2 Page - Exar Corporation |
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SP7651 Datasheet(HTML) 2 Page - Exar Corporation |
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2 / 15 page  2 Rev J: 3/4/07 SP765 Wide Input Voltage Range 3A, 900kHz, Buck Regulator © Copyright 2007 Sipex Corporation 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. VCC .................................................................................................. 7V VIN.................................................................................................. 22V ILX .................................................................................................... 5A BST................................................................................................ 35V LX-BST...............................................................................-0.3V to 7V LX ........................................................................................-V to 20V All other pins............................................................-0.3V to VCC+0.3V Storage Temperature................................................... -65°C to 150°C Power Dissipation..................................................... Internally Limited ESD Rating........................................................................... 2kV HBM Thermal Resistance ΟJC........................................................... 5°C/W ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. PARAMETER MIN. TYP. MAX. UNITS CONDITIONS QUIESCENT CURRENT Vcc Supply Current (No switching) .5 3 mA Vfb =0.9V Vcc Supply Current (switching) 8 2 mA • BST Supply Current (No switching) 0.2 0.4 mA Vfb =0.9V BST Supply Current (switching) 4 6 mA • PROTECTION: UVLO Vcc UVLO Start Threshold 4.00 4.25 4.5 V Vcc UVLO Hysteresis 00 200 300 mV UVIN Start Threshold 2.3 2.5 2.65 V • UVIN Hysteresis 200 300 400 mV UVIN Input Current µA UVIN= 3.0V ERROR AMPLIFIER REFERENCE Error Amplifier Reference 0.792 0.800 0.808 V 2X Gain Config., Measure Vfb; Vcc =5 V, T=25°C Error Amplifier Reference Over Line and Temperature 0.788 0.800 0.82 V • Error Amplifier Transconductance 6 mA/V Error Amplifier Gain 60 dB No Load COMP Sink Current 50 µA Vfb =0.9V, COMP= 0.9V COMP Source Current 50 µA Vfb =0.7V, COMP= 2.2V Vfb Input Bias Current 50 200 nA Vfb = 0.8V Internal Pole 4 MHz COMP Clamp 2.5 V Vfb =0.7V, TA=25¼C COMP Clamp Temp. Coefficient -2 mV/°C |
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