LP38501/3-ADJ 3A FlexCap Low Dropout Linear ... - Standard ICs

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LP38501/3-ADJ Symbol Parameter Conditions Min Typ Max Units AC Parameters PSRR Ripple Rejection V IN = 3.0V, I OUT = 3A f = 120Hz V IN = 3.0V, I OUT = 3A f = 1 kHz — 58 — — 56 — ρ n(l/f) Output Noise Density f = 120Hz, C OUT = 10 µF CER — 1.0 — µV/√Hz e n Thermal Characteristics Output Noise Voltage BW = 100Hz – 100kHz C OUT = 10 µF CER dB — 100 — µV (rms) T SD Thermal Shutdown T J rising — 170 — ΔT SD Thermal Shutdown Hysteresis T J falling from T SD — 10 — θ J-A θ J-C Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case TO-263 (Note 8) 1 sq. in. copper TO-263 — 5 — 37 °C °C/W Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but does not guarantee specific performance limits. For guaranteed specifications and conditions, see the Electrical Characteristics. Note 2: The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Note 3: Operating junction temperature must be evaluated, and derated as needed, based on ambient temperature (T A ), power dissipation (P D ), maximum allowable operating junction temperature (T J(MAX) ), and package thermal resistance (θ JA ). See Application Information. Note 4: Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the voltage at the input. Note 5: Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in the load current at the output. Note 6: The line and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the output voltage tolerance specification. Note 7: Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. For any output voltage less than 2.5V, the minimum V IN operating voltage is the limiting factor. Note 8: The value of θ JA for the TO-263 package can range from approximately 30 to 60°C/W depending on the amount of PCB copper dedicated to heat transfer (See Application Information). www.national.com 4
Typical Performance Characteristics Unless otherwise specified: T J = 25°C, V IN = 2.7V, V EN = V IN , C IN = 10 µF, C OUT = 10 µF, I OUT = 10 mA, V OUT = 1.8V Noise Density Noise Density LP38501/3-ADJ 30028110 30028114 I GND vs Load Current I GND(OFF) vs Temperature 30028111 30028112 V ADJ vs Temperature Dropout Voltage vs Load Current 30028113 30028115 5 www.national.com
Page 1 and 2: November 20, 2007 LP38501/3-ADJ 3A
Page 3: Absolute Maximum Ratings (Note 1) I
Page 7 and 8: Block Diagrams LP38501-ADJ Block Di
Page 9 and 10: e seen that it has good phase margi
Page 11 and 12: should be isolated from "clean" cir
Page 13 and 14: Physical Dimensions inches (millime

LP38501/3-ADJ 3A FlexCap Low Dropout Linear ... - Standard ICs

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