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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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LM3248TMXNOPB Datenblatt(PDF) 9 Page - Texas Instruments |
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LM3248TMXNOPB Datenblatt(HTML) 9 Page - Texas Instruments |
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9 / 31 page  t2 ENABLE must transition HIGH min. 25 µs before BOOST_GATE is brought HIGH. VOUT settles to within 90% of final value. VCON signal change must start min. 15 µs before slot boundary. VOUT transition follows VCON change. OUT_BOOST tracks at VOUT + 450 mV / 950 mV (3G4G/2G). t1 t0 ts t3 Slot Boundary. LM3248 Boost cycle ends. New boost output target selected. Start of next TTI power control. t2 Tx Slot N-1 t0 t1 OUT_BOOST PA RF POUT ENABLE VOUT BOOST_GATE VCON t = -15 s t = -45 s t = 0 s Tx Slot N ts t3 t = -70 s IOUT BOOST_GATE must transition HIGH min. 45 µs before slot boundary. LM3248 Auto- Boost cycle begins. Note: the BOOST_GATE minimum duration is shown. To minimize boost circuit current drain, the BOOST_GATE falling edge should occur as soon after this minimum time as possible and before the start of the next Tx slot. LM3248 www.ti.com SNVSA01A – JULY 2013 – REVISED SEPTEMBER 2013 ELECTRICAL CHARACTERISTICS (CONTROL INTERFACE) Limits in standard typeface are for TA = 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 = 2.7V to 5.5V. Symbol Parameter Condition Min Typ Max Units Input high level threshold VIH BOOST_GATE, MODE, 1.35 ENABLE V Input low level threshold VIL BOOST_GATE, MODE, 0.50 ENABLE VDD_BOOST = VDD2_BUCK = PVIN_BOOST = 3.8V SW_BOOST = OUT_BOOST = VDD1_BUCK = MODE, ENABLE, PVIN_BUCK = NO CONNECT BOOST_GATE Pins - HIGH 1) ENABLE = 1.8V, all remaining pins = GND Input Current 2) MODE = 1.8V, all remaining pins = GND 3) BOOST_GATE = 1.8V, all remaining pins = GND IIN –1 0 1 µA VDD_BOOST = VDD2_BUCK = PVIN_BOOST= 3.8V SW_BOOST = OUT_BOOST = VDD1_BUCK = MODE, ENABLE, PVIN_BUCK = NO CONNECT BOOST_GATE Pins - LOW 1) ENABLE = 0V, all remaining pins = 1.8V Input Current 2) MODE = ENABLE = 0V, all remaining pins = 1.8V 3) BOOST_GATE = ENABLE = 0V, all remaining pins = 1.8V STARTUP TIMING Figure 2. Startup + Optional Boost Timing Sequence Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM3248 |
Ähnliche Teilenummer - LM3248TMXNOPB |
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Ähnliche Beschreibung - LM3248TMXNOPB |
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