Datenblatt-Suchmaschine für elektronische Bauteile |
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LM1577-15 Datenblatt(PDF) 4 Page - National Semiconductor (TI) |
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LM1577-15 Datenblatt(HTML) 4 Page - National Semiconductor (TI) |
4 / 27 page Electrical Characteristics — LM1577-15, LM2577-15 (Continued) Specifications with standard type face are for T J = 25˚C, and those in bold type face apply over full Operating Temperature Range. Unless otherwise specified, V IN = 5V, and ISWITCH = 0. LM1577-15 LM2577-15 Units Symbol Parameter Conditions Typical Limit Limit (Limits) (Notes 3, 4) (Note 5) DEVICE PARAMETERS Undervoltage 2.70/2.65 2.70/2.65 V(min) Lockout 3.10/3.15 3.10/3.15 V(max) f O Oscillator Frequency Measured at Switch Pin 52 kHz I SWITCH = 100 mA 48/42 48/42 kHz(min) 56/62 56/62 kHz(max) V REF Output Reference Measured at Feedback Pin V Voltage V IN = 3.5V to 40V 15 14.70/14.55 14.70/14.55 V(min) V COMP = 1.0V 15.30/15.45 15.30/15.45 V(max) Output Reference V IN = 3.5V to 40V 10 mV Voltage Line Regulation R FB Feedback Pin Input 12.2 k Ω Voltage Line Regulator G M Error Amp I COMP = −30 µA to +30 µA 300 µmho Transconductance V COMP = 1.0V 170/110 170/110 µmho(min) 420/500 420/500 µmho(max) A VOL Error Amp V COMP = 1.1V to 1.9V 65 V/V Voltage Gain R COMP = 1.0 MΩ 40/20 40/20 V/V(min) (Note 7) Error Amplifier Upper Limit 2.4 V Output Swing V FEEDBACK = 12.0V 2.2/2.0 2.2/2.0 V(min) Lower Limit 0.3 V V FEEDBACK = 18.0V 0.4/0.55 0.40/0.55 V(max) Error Amp V FEEDBACK = 12.0V to 18.0V ±200 µA Output Current V COMP = 1.0V ±130/±90 ±130/±90 µA(min) ±300/±400 ±300/±400 µA(max) I SS Soft Start Current V FEEDBACK = 12.0V 5.0 µA V COMP = 0V 2.5/1.5 2.5/1.5 µA(min) 7.5/9.5 7.5/9.5 µA(max) D Maximum Duty V COMP = 1.5V 95 % Cycle I SWITCH = 100 mA 93/90 93/90 %(min) Switch Transconductance 12.5 A/V I L Switch Leakage V SWITCH = 65V 10 µA Current V FEEDBACK = 18.0V 300/600 300/600 µA(max) (Switch Off) V SAT Switch Saturation I SWITCH = 2.0A 0.5 V Voltage V COMP = 2.0V 0.7/0.9 0.7/0.9 V(max) (Max Duty Cycle) NPN Switch V COMP = 2.0V 4.3 A Current Limit 3.7/3.0 3.7/3.0 A(min) 5.3/6.0 5.3/6.0 A(max) www.national.com 4 |
Ähnliche Teilenummer - LM1577-15 |
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Ähnliche Beschreibung - LM1577-15 |
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