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SP6128ACY Datasheet(PDF) 2 Page - Exar Corporation |
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SP6128ACY Datasheet(HTML) 2 Page - Exar Corporation |
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2 / 10 page  2 Rev. 08/19/05 SP6128A Low Voltage, Synchronous Step Down PWM Controller © Copyright 2005 Sipex Corporation PARAMETER MIN TYP MAX UNITS CONDITIONS QUIESCENT CURRENT VCC Supply Current 0.5 1.0 mA No Switching PVCC Supply Current 1 20 µA No Switching, GH = Low VCC Supply Current(Disabled) 30 60 µA COMP=0V PVCC Supply Current (Disabled) 1 20 µA COMP=0V ERROR AMPLIFIER Error Amplifier Transconductance 0.6 ms COMP Sink Current 10 35 65 µA VFB = 0.9V, COMP = 0.9V, No Faults COMP Source Current 10 35 65 µA VFB = 0.7V, COMP = 2V COMP Output Impedance 3 MΩ VFB Input Bias Current 130 nA Error Amplifier Reference 0.788 0.8 0.812 V Trimmed with Error Amp in Unity Gain OSCILLATOR & DELAY PATH Internal Oscillator Frequency 270 300 330 kHz Maximum Controlled Duty Cycle 90 % Loop in control - 100% DC Possible Minimum Duty Cycle 0 % Comp=0.7V Minimum GH Pulse Width 150 250 ns PVCC > 4.5V, Ramp up COMP voltage until GH starts switching CURRENT LIMIT ISET Pin Sink Current 10 12.5 15 µA Temp = 25 °C ISET Current Temperature Coefficient 3400 ppm/°C Current Limit Time Constant 15 µs Overcurrent Comparator 100 125 150 mV VISET - VSWN, Temp = 25°C Threshold Voltage Threshold Voltage Temperature 3400 ppm/°C Coefficient ELECTRICAL CHARACTERISTICS Unless otherwise specified: -40°C < TA < 85°C, 3.0V < PVCC = VCC < 5.5V, CCOMP = 22nF, CGH = CGL = 3.3nF, VFB = 0.8V, SWN = GND = 0V, typical value for design guideline only. VCC, PVCC ......................................................................................... 7V BST .................................................................. 13.2V BST-SWN .............................................................. 7V SWN ............................................................ -1V to 7V GH ............................................... -0.3V to BST +0.3V GH-SWN ............................................................... 7V All other pins ................................ -0.3V to VCC + 0.3V Peak Output Current < 10µs GH,GL .................................................................. 2A Storage Temperature ........................ -65°C to 150°C Power Dissipation .............................................. 1.3W Junction Temperature, TJ ................................ 125°C Lead Temperature (Soldering, 10 sec) ............ 300°C ESD Rating. ................................................ 2kV HBM Thermal Resistance θJC ............................. 31.7°C/W 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. ABSOLUTE MAXIMUM RATINGS |
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