Datasheet

LM2622
SNVS068E –MAY 2000–REVISED MARCH 2013 www.ti.com
Absolute Maximum Ratings
(1)(2)
V
IN
12V
SW Voltage 18V
FB Voltage 7V
V
C
Voltage 7V
SHDN Voltage 7V
FSLCT 12V
Maximum Junction Temperature 150°C
Power Dissipation
(3)
Internally Limited
Lead Temperature 300°C
Vapor Phase (60 sec.) 215°C
Infrared (15 sec.) 220°C
ESD Susceptibility
(4)
Human Body Model 2kV
Machine Model 200V
(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
Storage Temperature −65°C to +150°C
Supply Voltage 2V to 12V
(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).
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
=2.0V and I
L
= 0A, unless otherwise specified.
Min Typ Max
Symbol Parameter Conditions Units
(1) (2) (1)
I
Q
Quiescent Current FB = 0V (Not Switching) 1.3 2.0 mA
V
SHDN
= 0V 5 10 µA
V
FB
Feedback Voltage 1.2285 1.26 1.2915 V
I
CL
(3)
Switch Current Limit V
IN
= 2.7V
(4)
1.0 1.65 2.3 A
ΔV
O
/ΔI
LOAD
Load Regulation V
IN
= 3.3V 6.7 mV/A
%V
FB
/ΔV
IN
Feedback Voltage Line 2.0V ≤ V
IN
≤ 12.0V 0.013 0.1 %/V
Regulation
I
B
FB Pin Bias Current
(5)
0.5 20 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) Duty cycle affects current limit due to ramp generator.
(4) Current limit at 0% duty cycle. See Typical Performance Characteristics section for Switch Current Limit vs. V
IN
(5) Bias current flows into FB pin.
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