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LM3211 Datasheet(PDF) 6 Page - National Semiconductor (TI) |
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LM3211 Datasheet(HTML) 6 Page - National Semiconductor (TI) |
6 / 21 page Electrical Characteristics Specifications in standard type face are for T J = 25˚C and those with boldface type apply over the full Operating Tempera- ture Range (T J = −40˚C to +125˚C). Unless otherwise specified, VIN =2.2V and Vs+ = 8V. BUFFERS Symbol Parameter Conditions Min (Note 4) Typ (Note 5) Max (Note 4) Units V OS Input offset voltage 2.5 10 mV ∆V os/ ∆T Offset Voltage Drift 8 µV/˚C I B Input Bias Current 170 800 nA CMVR Input Common-mode Voltage Range 0.05 Vs+-0.05 V Z IN Input Impedance 400 k Ω C IN Input Capacitance 1 pF I OUT Continuous Output Current Vs+=8V, Source 30 39 47 mA Vs+=8V, Sink −45 −37 −27 Vs+=12V, Source 35 48 59 Vs+=12V, Sink −54 −44 −32 V OUT Swing R L=10k, Vo min. 0.075 V R L=10k, Vo max. 7.88 R L=2k, Vo min. 0.075 R L=2k, Vo max. 7.85 A VCL Voltage Gain R L =2 k Ω R L=10 k Ω 0.994 0.9985 0.998 0.9999 V/V NL Gain Linearity R L =2 k Ω, Buffer input=0.5 to (Vs+-0.5V) 0.01 % Vs+ Supply Voltage 412 V PSRR Power Supply Rejection Ratio Vs+=4to12V 90 316 µV/V Is+ Supply Current/Amplifier Vo = Vs+/2, No Load 0.75 1.2 mA SR Slew Rate C L =150pf 5.3 V/µs BW Bandwidth -3dB,R L =10 k Ω,C L =100pf 3 MHz φ M Phase Margin C L =100pf 78 Deg˚ Note 1: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. See the Electrical Characteristics table for the thermal resistance of various layouts. The maximum allowable power dissipation at any ambient temperature is calculated using: PD (MAX) = (TJ(MAX) −TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Note 2: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k Ω resistor into each pin. The machine model is a 200pF capacitor discharged directly into each pin. Note 4: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100% production tested or guaranteed through statistical analysis. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). Note 5: Typical numbers are at 25˚C and represent the most likely norm. Note 6: Duty cycle affects current limit due to ramp generator. See Switch Current Limit vs. VIN and Switch Current Limit vs. Temperature graphs in the Typical Performance Characteristics section. Note 7: See Typical Performance Characteristics section for Tri-Temperature data for RDSON vs. VIN. Note 8: Bias current flows into FB pin. www.national.com 6 |
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