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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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LM2717 Fiches technique(PDF) 5 Page - Texas Instruments |
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LM2717 Fiches technique(HTML) 5 Page - Texas Instruments |
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5 / 17 page  LM2717 www.ti.com SNVS253D – MAY 2005 – REVISED MARCH 2013 Electrical Characteristics (continued) Specifications in standard type face are for TJ = 25°C and those with boldface type apply over the full Operating Temperature Range (TJ = −40°C to +125°C). VIN = 5V, IL = 0A, and FSW = 300kHz unless otherwise specified. Symbol Parameter Conditions Min(1) Typ(2) Max(1) Units ICL1 (3) Fixed Buck Switch Current VIN = 8V (4) 2.2 A Limit ICL2 (3) Adjustable Buck Switch VIN = 8V (4) 3.2 A Current Limit IB1 Fixed Buck FB Pin Bias VIN = 20V 65 µA Current(5) IB2 Adjustable Buck FB Pin Bias VIN = 20V 65 nA Current(5) VIN Input Voltage Range 4 20 V gm1 Fixed Buck Error Amp ΔI = 20µA 1340 µmho Transconductance gm2 Adjustable Buck Error Amp ΔI = 20µA 1360 µmho Transconductance AV1 Fixed Buck Error Amp Voltage 134 V/V Gain AV2 Adjustable Buck Error Amp 136 V/V Voltage Gain DMAX Maximum Duty Cycle 89 93 % FSW Switching Frequency RF = 46.4k 200 300 400 kHz RF = 22.6k 475 600 775 kHz ISHDN1 Fixed Buck Shutdown Pin 0V < VSHDN1 < 7.5V −5 5 µA Current ISHDN2 Adjustable Buck Shutdown Pin 0V < VSHDN2 < 7.5V −5 5 µA Current IL1 Fixed Buck Switch Leakage VIN = 20V 0.01 5 µA Current IL2 Adjustable Buck Switch VIN = 20V 0.01 5 µA Leakage Current RDSON1 Fixed Buck Switch RDSON (6) 160 m Ω RDSON2 Adjustable Buck Switch 160 m Ω RDSON (6) ThSHDN1 Fixed Buck SHDN Threshold Output High 1.8 1.36 V Output Low 1.33 0.7 ThSHDN2 Adjustable Buck SHDN Output High 1.8 1.36 V Threshold Output Low 1.33 0.7 ISS1 Fixed Buck Soft Start Pin 4 9 15 µA Current ISS2 Adjustable Buck Soft Start Pin 4 9 15 µA Current UVP On Threshold 4 3.8 V Off Threshold 3.6 3.3 θJA Thermal Resistance(7) TSSOP, package only 115 °C/W (3) Duty cycle affects current limit due to ramp generator. (4) Current limit at 0% duty cycle. See TYPICAL PERFORMANCE section for Switch Current Limit vs. VIN (5) Bias current flows into FB pin. (6) Includes the bond wires, RDSON from VIN pin(s) to SW pin. (7) Refer to Texas Instruments packaging website for more detailed thermal information and mounting techniques for the TSSOP package. Copyright © 2005–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM2717 |
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