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LM3248TMENOPB датащи(PDF) 7 Page - Texas Instruments |
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LM3248TMENOPB датащи(HTML) 7 Page - Texas Instruments |
7 / 31 page LM3248 www.ti.com SNVSA01A – JULY 2013 – REVISED SEPTEMBER 2013 SYSTEM CHARACTERISTICS (BUCK) The following spec table entries are specified by design and verification providing the component values in the Typical Application Diagram are used: L = 1.5 µH (TOKO 1285AS-H-1R5N); CIN = 10 µF (Murata GRM155R61A106A); and COUT = 10 µF + 4.7 µF (Murata GRM155R61A106A, GRM155R61A475MEAA) + 4 x 1.0 µF (Murata GRM033R60J105M). These parameters are not verified by production testing. (1) Min and Max values are specified over the ambient temperature range TA = −30°C ≤ TA ≤ +90°C. Typical values are specified at VBATT = 3.8V and TA = 25°C unless otherwise stated. Symbol Parameter Condition Min Typ Max Units Time Delay required after TWarm-Up BOOST_GATE = HIGH (before ENABLE = High 30 µs VCON can change) Time for VOUT to rise from 0V to VBATT = 3.8V, RLOAD = 68Ω, 3.4V (90% or 3.06V) VCON = 0V to 1.36V 15 Time for VOUT to fall from 3.4V to VBATT = 3.8V, RLOAD = 68Ω, 0V (10% or 0.34V) VCON = 1.36V to 0V Time for VOUT to rise from 0.8V to VBATT = 3.8V, RLOAD = 20Ω, 3.3V (90% or 3.05V) VCON = 0.32V to 1.32V 10 Time for VOUT to fall from 3.3V to VBATT = 3.8V, RLOAD = 20Ω, 0.8V (10% or 1.05V) VCON = 1.32 to 0.32V Time for VOUT to rise from 1.4V to VBATT = 3.8V, RLOAD = 6.8Ω, TRESPONSE µs 3.4V (90% or 3.2V) VCON = 0.56V to 1.36V 10 Time for VOUT to fall from 3.4V to VBATT = 3.8V, RLOAD = 6.8Ω, 1.4V (10% or 1.6V) VCON = 1.36V to 0.56V VBATT = 3.8V, RLOAD = 2.2Ω, Time for VOUT to rise from 1.8V to VCON = 0.72V to 1.12V 2.8V (93% or 2.73V) MODE = 2G 15 VBATT = 3.8V, RLOAD = 2.2Ω Time for VOUT to fall from 2.8V to VCON = 1.12V to 0.72V 1.8V (7% or 1.87V) MODE = 2G Positive transient peak current ILIM,PFET,Transient VOUT = 1.5V (2) 1.9 2.1 A limit VBATT ≥ 2.88V, VCON = 1.48V (VOUT = 3.7V), PWM mode, switcher plus ACB 2.0 current Maximum load current in PWM IOUT_MAX, PWM VBATT ≥ 3.0V, VCON = 1.48V (VOUT = 3.7V), A mode 2.3 PWM mode, switcher plus ACB current VCON = 1.2V (VOUT = 3.0V), PWM mode, 2.5 switcher plus ACB current Load current to enter into PFM VBATT/VOUT = 3.6/3.3V, 4.2/4.0V, IOUT_PFM mode at high duty cycle (D > 0.85 35 mA BOOST_GATE = LOW AND Boost in Bypass) Maximum load current to enter IOUT_MAX, PFM D < 0.85 or SW_BOOST = switching 85 mA into PFM mode Maximum output transient pullup IOUT,PU 3.0 current limit PWM mode (2), switcher plus ACB current A PWM maximum output transient IOUT,PD_PWM −3.0 pulldown current limit VOUT accuracy over output voltage VOUT_ACC VOUT = 0.6V to 3.6V (3) −3 +3 % range (1) Parameter is specified by design, characterization testing, or statistical analysis. Typical numbers are not verified by production testing, but do represent the most likely norm. (2) Current limit is built-in, fixed, and not adjustable. (3) Accuracy limits are ±3% or ±50 mV, whichever is larger. Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM3248 |
Аналогичный номер детали - LM3248TMENOPB |
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Аналогичное описание - LM3248TMENOPB |
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