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3 / 20 page MC34025 MC33025 3 MOTOROLA ANALOG IC DEVICE DATA ELECTRICAL CHARACTERISTICS (VCC = 15 V, RT = 3.65 kΩ, CT = 1.0 nF, for typical values TA = + 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 2], unless otherwise noted.) Characteristic Symbol Min Typ Max Unit ERROR AMPLIFIER SECTION Input Offset Voltage VIO – – 15 mV Input Bias Current IIB – 0.6 3.0 µA Input Offset Current IIO – 0.1 1.0 µA Open–Loop Voltage Gain (VO = 1.0 V to 4.0 V) AVOL 60 95 – dB Gain Bandwidth Product (TJ = + 25°C) GBW 4.0 8.3 – MHz Common Mode Rejection Ratio (VCM = 1.5 V to 5.5 V) CMRR 75 95 – dB Power Supply Rejection Ratio (VCC = 10 V to 30 V) PSRR 85 110 – dB Output Current, Source (VO = 4.0 V) Output Current, Sink (VO = 1.0 V) ISource ISink 0.5 1.0 3.0 3.6 – – mA Output Voltage Swing, High State (IO = – 0.5 mA) Output Voltage Swing, Low State (IO = 1.0 mA) VOH VOL 4.5 0 4.75 0.4 5.0 1.0 V Slew Rate SR 6.0 12 – V/ µs PWM COMPARATOR SECTION Ramp Input Bias Current IIB – – 0.5 – 5.0 µA Duty Cycle, Maximum Duty Cycle, Minimum DC(max) DC(min) 80 – 90 – – 0 % Zero Duty Cycle Threshold Voltage Pin 3(4) (Pin 7(9) = 0 V) Vth 1.1 1.25 1.4 V Propagation Delay (Ramp Input to Output, TJ = + 25°C) tPLH(in/out) – 60 100 ns SIFT–START SECTION Charge Current (VSoft–Start = 0.5 V) Ichg 3.0 9.0 20 µA Discharge Current (VSoft–Start = 1.5 V) Idischg 1.0 4.0 – mA CURRENT SENSE SECTION Input Bias Current (Pin 9(12) = 0 V to 4.0 V) IIB – – 15 µA Current Limit Comparator Threshold Sh td C t Th h ld Vth V 0.9 125 1.0 140 1.10 155 V p Shutdown Comparator Threshold th Vth 1.25 1.40 1.55 Propagation Delay (Current Limit/Shutdown to Output, TJ = + 25°C) tPLH(in/out) – 50 80 ns OUTPUT SECTION Output Voltage Low State (ISink = 20 mA) (ISink = 200 mA) High State (ISource = 20 mA) (ISource = 200 mA) VOL VOH – – 13 12 0.25 1.2 13.5 13 0.4 2.2 – – V Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 0.5 mA) VOL(UVLO) – 0.25 1.0 V Output Leakage Current (VC = 20 V) IL – 100 500 µA Output Voltage Rise Time (CL = 1.0 nF, TJ = + 25°C) tr – 30 60 ns Output Voltage Fall Time (CL = 1.0 nF, TJ = + 25°C) tf – 30 60 ns UNDERVOLTAGE LOCKOUT SECTION Start–Up Threshold (VCC Increasing) Vth(on) 8.8 9.2 9.6 V UVLO Hysteresis Voltage (VCC Decreasing After Turn–On) VH 0.4 0.8 1.2 V TOTAL DEVICE Power Supply Current Start–Up (VCC = 8.0 V) Operating ICC – – 0.5 25 1.2 35 mA NOTES: 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Tlow = 0°C for MC34025 Thigh = +70°C for MC34025 Tlow = – 40°C for MC33025 Thigh = +105°C for MC33025 |
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