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LM3248TMENOPB データシート(PDF) 6 Page - Texas Instruments |
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LM3248TMENOPB データシート(HTML) 6 Page - Texas Instruments |
6 / 31 page LM3248 SNVSA01A – JULY 2013 – REVISED SEPTEMBER 2013 www.ti.com ELECTRICAL CHARACTERISTICS (BUCK) Limits in standard typeface are for TA = TJ = 25°C. Limits in boldface type apply over the full operating ambient temperature range ( −30°C ≤ TA ≤ +90°C). Unless otherwise noted, all specifications apply with VBATT = 3.8V. Symbol Parameter Condition Min Typ Max Units VFB,MIN Feedback voltage at low setting VCON = 0.16V, MODE = HIGH (1) (2) 0.35 0.4 0.45 V VCON = 1.6V, MODE = HIGH, VBATT = 5.0V VFB,MAX Feedback voltage at high setting 3.88 4.0 4.12 (1) (2) ILIM,PFET,Steady Positive steady state peak current VOUT = 1.5V (3) 1.34 1.45 1.65 State limit Positive Active Current assist VCON = 0.6V, VACB = 2.8V IP-ACB,2G 1.40 1.70 2.0 A Bypass current limit (3) NFET Switch negative peak ILIM,NFET VCON = 1.0V (3) −1.50 −1.31 current limit ISHDN Shutdown supply current IBATT ENABLE = LOW (4) 0.02 4 IQ_PFM ENABLE = HIGH 260 350 µA DC bias current from VBATT IQ_PWM ENABLE = HIGH 1010 1100 FOSC Internal oscillator frequency 2G/3G/4G mode, PWM mode, average 2.484 2.7 2.916 MHz (1) The parameters in the electrical characteristics table are tested under open loop conditions at VBATT = 3.8V unless otherwise specified. For performance over the input voltage range and closed-loop results, refer to the datasheet curves. (2) VOUT-BOOST = VCON * 2.5 + [≈ 450 mV(3G/4G) or ≈ 950 mV(2G)]. (3) Current limit is built-in, fixed, and not adjustable. (4) Shutdown current includes leakage current of PFET. 6 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: LM3248 |
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