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LM3477MMX Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LM3477MMX Datasheet(HTML) 4 Page - National Semiconductor (TI) |
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4 / 23 page  Electrical Characteristics (Note 4) (Continued) Specifications in Standard type face are for T J = 25˚C, and in bold type face apply over the full Operating Temperature Range. Unless otherwise specified, V IN = 12V. Symbol Parameter Conditions Typical Limit Units V CL(O) Current Limit Voltage at 0% Duty Cycle LM3477 155 130/125 185/190 mV mV (min) mV (max) LM3477A 165 140/135 195/200 mV mV (min) mV (max) V CL(100) Current Limit Voltage at 100% Duty Cycle LM3477 74 50/43 98/98 mV mV (min) mV (max) LM3477A 65 41/25 89/98 mV mV (min) mV (max) V SC Short-Circuit Current Limit Sense Voltage V IN = 5V, LM3477 350 270 420 mV mV (min) mV (max) V IN = 5V, LM3477A 310 260 380 mV mV (min) mV (max) V SL Internal Compensation Ramp Voltage Height V IN = 5V, LM3477 83 mV V IN = 5V, LM3477A 103 V OVP Output Over-voltage Protection (with respect to feedback voltage) (Note 7) V COMP = 1.4V 50 32/25 78/85 mV mV(min) mV(max) V OVP(HYS) Output Over-Voltage Protection Hysteresis(Note 7) V COMP = 1.4V 60 20 110 mV mV(min) mV(max) Gm Error Amplifier Transconductance V COMP = 1.4V I EAO = 100µA (Source/Sink) 750 600/365 1000/1265 µmho µmho (min) µmho (max) A VOL Error Amplifier Voltage Gain V COMP = 1.4V I EAO = 100µA (Source/Sink) 38 30 42 V/V V/V (min) V/V (max) I EAO Error Amplifier Output Current (Source/ Sink) Source, V COMP = 1.4V, V FB =0V 100 75/50 130/160 µA µA (min) µA (max) Sink, V COMP = 1.4V, VFB = 1.4V −140 −110/−95 −170/−180 µA µA (min) µA (max) V EAO Error Amplifier Output Voltage Swing Upper Limit V FB =0V COMP Pin = Floating 2.2 2.0 2.35 V V(min) V(max) Lower Limit V FB = 1.4V 0.75 0.5 0.95 V V(min) V(max) T SS Internal Soft-Start Delay V FB = 1.2V, VCOMP = Floating 5 msec T r Drive Pin Rise Time C GS = 3000pF, VDR =0 to 3V 25 ns T f Drive Pin Fall Time C GS = 3000pF, VDR =0 to 3V 25 ns www.national.com 4 |
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Similar Description - LM3477MMX |
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