Datasheet

LM2674
www.ti.com SNVS007F –SEPTEMBER 1998–REVISED APRIL 2013
Absolute Maximum Ratings
(1)(2)
Supply Voltage 45V
ON/OFF Pin Voltage −0.1V ≤ V
SH
≤ 6V
Switch Voltage to Ground −1V
Boost Pin Voltage V
SW
+ 8V
Feedback Pin Voltage −0.3V ≤ V
FB
≤ 14V
ESD Susceptibility Human Body Model
(3)
2 kV
Power Dissipation Internally Limited
Storage Temperature Range −65°C to +150°C
Vapor Phase (60s) +215°C
D Package
Infrared (15s) +220°C
Lead Temperature
P Package (Soldering, 10s) +260°C
WSON Package (See AN-1187)
Maximum Junction Temperature +150°C
(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 ≤ T
J
≤ +125°C
Electrical Characteristics LM2674-3.3
Specifications with standard type face are for T
J
= 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)
V
OUT
Output Voltage V
IN
= 8V to 40V, I
LOAD
= 20 mA to 500 mA 3.3 3.251/3.201 3.350/3.399 V
V
OUT
Output Voltage V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 250 mA 3.3 3.251/3.201 3.350/3.399 V
η Efficiency V
IN
= 12V, I
LOAD
= 500 mA 86 %
(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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