LM2674
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SNVS007F –SEPTEMBER 1998–REVISED APRIL 2013
Absolute Maximum Ratings(1)(2)
Supply Voltage
45V
−0.1V ≤ VSH ≤ 6V
−1V
ON/OFF Pin Voltage
Switch Voltage to Ground
Boost Pin Voltage
VSW + 8V
Feedback Pin Voltage
ESD Susceptibility
−0.3V ≤ VFB ≤ 14V
Human Body Model(3)
2 kV
Internally Limited
−65°C to +150°C
+215°C
Power Dissipation
Storage Temperature Range
Vapor Phase (60s)
Infrared (15s)
D Package
+220°C
Lead Temperature
P Package (Soldering, 10s)
WSON Package
+260°C
(See AN-1187)
+150°C
Maximum Junction Temperature
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but device parameter specifications may not be ensured under these conditions. For
ensured specifications and test conditions, see the Electrical Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Operating Ratings
Supply Voltage
6.5V to 40V
Junction Temperature Range
−40°C ≤ TJ ≤ +125°C
Electrical Characteristics LM2674-3.3
Specifications with standard type face are for TJ = 25°C, and those with bold type face apply over full Operating
Temperature Range.
Symbol
Parameter
Conditions
Typical(1)
Min(2)
Max(2)
Units
SYSTEM PARAMETERS Test Circuit Figure 22(3)
VOUT
VOUT
η
Output Voltage
Output Voltage
Efficiency
VIN = 8V to 40V, ILOAD = 20 mA to 500 mA
VIN = 6.5V to 40V, ILOAD = 20 mA to 250 mA
VIN = 12V, ILOAD = 500 mA
3.3
3.3
86
3.251/3.201
3.251/3.201
3.350/3.399
3.350/3.399
V
V
%
(1) Typical numbers are at 25°C and represent the most likely norm.
(2) All limits ensured at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are ensured via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator performance. When the LM2674 is used as shown in Figure 22 andFigure 23 test circuits, system performance will
be as specified by the system parameters section of the Electrical Characteristics.
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