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LM2640 датащи(PDF) 5 Page - Texas Instruments

номер детали LM2640
подробное описание детали  LM2640 Dual Adjustable Step-Down Switching Power Supply Controller
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

LM2640 датащи(HTML) 5 Page - Texas Instruments

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LM2640
www.ti.com
SNVS019B – DECEMBER 1998 – REVISED APRIL 2013
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1) (2) (3)
IN, SW1, and SW2
−0.3 to 31V
FB1 and FB2
−0.3 to 3V
SD, ON/OFF1, ON/OFF2, 2NDFB/FPWM, SYNC, REF, SS1, SS2, COMP1, COMP2 and CSL1
−0.3 to (VLIN +0.3)V
LIN
−0.3 to 6V
CSH1, CSH2, and CSL2
−0.3 to 7V
Voltage from CBOOT1 to SW1 and from CBOOT2 to SW2
−0.3 to 5V
Voltage from HDRV1 to SW1 and from HDRV2 to SW2
−0.3V
Voltage from CBOOT1 to HDRV1 and from CBOOT2 to HDRV2
−0.3V
Junction Temp.
+150°C
Power Dissipation(4)
883 mW
Ambient Storage Temp. (TJ)
−65 to +150°C
Wave
4 sec, 260°C
Soldering Dwell Time, Temp.(5)
Infrared
10 sec, 240°C
Vapor Phase
75 sec, 219°C
ESD Rating(6)
2 kV
(1)
Unless otherwise specified, all voltages are with respect to the voltage at the GND and PGND pins.
(2)
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits and
associated test conditions, see the Electrical Characteristics tables.
(3)
If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.
(4)
The Absolute Maximum power dissipation depends on the ambient temperature. The 883 mW rating results from substituting 150°C,
70°C, and 90.6°C/W for TJmax, TA, and θJA respectively into the formula Pmax = (TJmax - TA)/θJA, where Pmax is the Absolute Maximum
power dissipation, TJmax is the Absolute Maximum junction temperature, TA is the ambient temperature, and θJA is the junction-to-
ambient thermal resistance of the package. A
θJA of 90.6°C/W represents the worst-case condition of no heat sinking of the 28-pin
TSSOP. Heat sinking allows the safe dissipation of more power. The Absolute Maximum power dissipation must be derated by 11.04
mW per °C above 70°C ambient. The LM2640 actively limits its junction temperature to about 150°C.
(5)
For detailed information on soldering plastic small-outline packages, refer to (SNOA549) available from TI.
(6)
For testing purposes, ESD was applied using the human-body model, a 100 pF capacitor discharged through a 1.5 k
Ω resistor.
Operating Ratings
(1) (2)
VIN
5.5 to 30V
Junction Temp. (TJ)
0 to +125°C
(1)
Unless otherwise specified, all voltages are with respect to the voltage at the GND and PGND pins.
(2)
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits and
associated test conditions, see the Electrical Characteristics tables.
Copyright © 1998–2013, Texas Instruments Incorporated
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