Datasheet

LM5000
www.ti.com SNVS176D –MAY 2004–REVISED MARCH 2007
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)
V
IN
-0.3V to 40V
SW Voltage -0.3V to 80V
FB Voltage -0.3V to 5V
COMP Voltage -0.3V to 3V
All Other Pins -0.3V to 7V
Maximum Junction Temperature 150°C
Power Dissipation
(3)
Internally Limited
Lead Temperature 216°C
Infrared (15 sec.) 235°C
ESD Susceptibility
(4)
Human Body Model 2kV
Machine Model 200V
Storage Temperature −65°C to +150°C
(1) Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the
device is intended to be functional, but device parameter specifications may not be ensured. 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 maximum allowable power dissipation is a function of the maximum junction temperature, T
J
(MAX), the junction-to-ambient thermal
resistance, θ
JA
, and the ambient temperature, T
A
. See the Electrical Characteristics table for the thermal resistance of various layouts.
The maximum allowable power dissipation at any ambient temperature is calculated using: P
D
(MAX) = (T
J(MAX)
− T
A
)/θ
JA
. Exceeding
the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown.
(4) The human body model is a 100 pF capacitor discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF
capacitor discharged directly into each pin.
Operating Conditions
Operating Junction Temperature Range
(1)
−40°C to +125°C
Supply Voltage
(1)
3.1V to 40V
(1) Supply voltage, bias current product will result in aditional device power dissipation. This power may be significant. The thermal
dissipation design should take this into account.
Electrical Characteristics
Specifications in standard type face are for T
J
= 25°C and those with boldface type apply over the full Operating
Temperature Range (T
J
= −40°C to +125°C) Unless otherwise specified. V
IN
= 12V and I
L
= 0A, unless otherwise specified.
Symbol Parameter Conditions Min
(1)
Typ
(2)
Max
(1)
Units
I
Q
Quiescent Current FB = 2V (Not Switching)
2.0 2.5 mA
FS = 0V
FB = 2V (Not Switching)
2.1 2.5 mA
FS = Open
V
SHDN
= 0V 18 30 µA
V
FB
Feedback Voltage 1.2330 1.259 1.2840 V
I
CL
Switch Current Limit 1.35 2.0 2.7 A
%V
FB
/ΔV
IN
Feedback Voltage Line 3.1V ≤ V
IN
≤ 40V 0.001 0.04 %/V
Regulation
I
B
FB Pin Bias Current
(3)
55 200 nA
(1) All limits specified at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are
100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC)
methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) Bias current flows into FB pin.
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