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LM3248 Arkusz danych(PDF) 4 Page - Texas Instruments

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Numer części LM3248
Szczegółowy opis  LM3248 2.7 MHz, 2.5A Adjustable Boost-Buck DC/DC Converter
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Strona internetowa  http://www.ti.com
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LM3248 Arkusz danych(HTML) 4 Page - Texas Instruments

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LM3248
SNVSA01A – JULY 2013 – REVISED SEPTEMBER 2013
www.ti.com
ABSOLUTE MAXIMUM RATINGS
(1) (2)
VBATT pins to GND (PVIN_BOOST, VDD_BOOST, SW_BOOST, PVIN_BUCK,
VDD1_BUCK, VDD2_BUCK, SW_BUCK, ACB, SGND_BOOST, SGND_BUCK, BGND,
PGND)
−0.2V to +6.0V
BOOST_GATE, MODE, ENABLE, OUT_BOOST, FB_BUCK, VCON
(GND
−0.2V to PVIN_BOOST +0.2V)
Junction Temperature (TJ-MAX)
+150°C
Storage Temperature Range
−65°C to +150°C
Continuous Power Dissipation (3)
Internally Limited
Maximum Lead Temperature
(Soldering, 10 sec)
+260°C
ESD Rating (4)
Human Body Model
2 kV
(1)
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2)
All voltages are with respect to the potential at the GND pins. The LM3248 is designed for mobile phone applications where turn-on after
power-up is controlled by the system controller, and where requirements for a small package size overrule increased die size for internal
Under Voltage Lock-Out (UVLO) circuitry. Thus, it should be kept in shutdown by holding the EN pin low until the input voltage exceeds
2.5V.
(3)
Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ = 150°C (typ.) and
disengages at TJ < 130°C (typ.).
(4)
The Human Body Model is a 100 pF capacitor discharged through a 1.5 k
Ω resistor into each pin. (MIL-STD-883 3015.7)
RECOMMENDED OPERATING CONDITIONS
(1)
Input Voltage Range VBATT
2.7V to 5.5V
Boost Output, Buck Input Range
2.7V to 5.5V
Recommended Load Current
0A to 2.5A
Junction Temperature (TJ) Range
−30°C to +125°C
Ambient Temperature (TA) Range
−30°C to +90°C
(1)
All voltages are with respect to the potential at the GND pins. The LM3248 is designed for mobile phone applications where turn-on after
power-up is controlled by the system controller, and where requirements for a small package size overrule increased die size for internal
Under Voltage Lock-Out (UVLO) circuitry. Thus, it should be kept in shutdown by holding the EN pin low until the input voltage exceeds
2.5V.
THERMAL PROPERTIES
Junction-to-Ambient Thermal Resistance (
θJA)
(1)
30-bump DSBGA
38°C/W
(1)
Junction-to-ambient thermal resistance (
θJA) is taken from a thermal modeling result, performed under the conditions and guidelines set
forth in the JEDEC standard JESD51-7 and is board dependent.
4
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