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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MC34708 датащи(PDF) 61 Page - Freescale Semiconductor, Inc |
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MC34708 датащи(HTML) 61 Page - Freescale Semiconductor, Inc |
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61 / 159 page  Analog Integrated Circuit Device Data 61 Freescale Semiconductor MC34708 Functional Block Description Table 48. SW5 Electrical Specifications Characteristics noted under conditions BP = 3.6 V, VBUS = 5.0 V, -40 C TA 85 C, unless otherwise noted. Typical values at BP = 3.6 V and TA = 25 °C under nominal conditions, unless otherwise noted. Symbol Characteristic Min Typ Max Unit Notes SW5 BUCK REGULATOR VSW5IN Operating Input Voltage • PWM operation, 0 < IL < IMAX • PFM operation, 0 < IL < ILMAX 3.0 2.8 - - 4.5 4.5 V VSW5ACC Output Voltage Accuracy • PWM mode including ripple, load regulation, and transients • PFM Mode, including ripple, load regulation, and transients Nom-3% Nom-3% Nom Nom Nom+3% Nom+3% mV (53) ISW5 Continuous Output Load Current, VINMIN < BP < 4.5 V • PWM mode • PFM mode - - - 50 1000 - mA ISW5PEAK Current Limiter Peak Current Detection •VIN = 3.6 V Current through Inductor - 1.0 - A ISW5 TRANSIENT Transient Load Change • 100 mA/µs - - 500 mA VSW5 OS-START Start-up Overshoot, IL = 0 - - 25 mV tON-SW5 Turn-on Time • Enable to 90% of end value IL = 0 - - 500 µs fSW5 Switching Frequency • PLLX = 0 • PLLX = 1 - - 2.0 4.0 - - MHz ISW5Q Quiescent Current Consumption • PWMPS or APS MODE, IL = 0 mA; device not switching • PFM MODE, IL = 0 mA; device not switching - - 160 15 - - µA SW5 Efficiency •PFM, 1.8 V, 1.0 mA • PWM Pulse skipping, 1.8 V, 50 mA • PWM Pulse skipping, 1.8 V, 500 mA •PWM, 1.8 V, 1000 mA - - - - 80 79 86 82 - - - - % (54) Notes 53. Transient Loading for load Steps of ILMAX/2 54. Efficiency numbers at VIN = 3.6 V, Excludes the quiescent current. |
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