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LMZ10505EXT
SNVS669G – JUNE 2010 – REVISED OCTOBER 2013
Operating Ratings (1)
VIN to GND
Junction Temperature (T J )
www.ti.com
2.95V to 5.5V
-55°C to 125°C
(1)
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For ensured specifications and test conditions, see the Electrical Characteristics.
Electrical Characteristics
Specifications with standard typeface are for T J = 25°C only; limits in bold face type apply over the operating junction
temperature range T J of -55°C to 125°C. Minimum and maximum limits are ensured through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at T J = 25°C, and are provided for reference purposes
only. V IN = V EN = 3.3V, unless otherwise indicated in the conditions column.
Symbol
Parameter
Conditions
Min
(1)
Typ
(2)
Max
(1)
Units
SYSTEM PARAMETERS
V FB
Total Feedback Voltage Variation
V IN = 2.95V to 5.5V
0.78
0.8
0.82
V
Including Line and Load Regulation
V OUT = 2.5V
I OUT = 0A to 5A
V FB
Feedback Voltage Variation
V IN = 3.3V, V OUT = 2.5V
0.787
0.8
0.812
V
I OUT = 0A
V FB
Feedback Voltage Variation
V IN = 3.3V, V OUT = 2.5V
0.785
0.798
0.81
V
I OUT = 5A
V IN(UVLO)
I SS
I Q
I SD
Input UVLO Threshold (Measured at VIN
pin)
Soft-Start Current
Non-Switching Input Current
Shut Down Quiescent Current
Rising
Falling
Charging Current
V FB = 1V
V IN = 5.5V, V EN = 0V
1.95
2.6
2.4
2
1.55
267
2.95
3
500
V
μA
mA
μA
I OCL
f FB
Output Current Limit (Average Current)
Frequency Fold-back
V OUT = 2.5V
In current limit
5.1
7.3
250
8.7
A
kHz
PWM SECTION
f SW
D range
Switching Frequency
PWM Duty Cycle Range
700
0
1000
1160
100
kHz
%
ENABLE CONTROL
V EN-IH
EN Pin Rising Threshold
1.23
1.8
V
V EN-IF
EN Pin Falling Threshold
0.8
1.06
V
THERMAL CONTROL
T SD
T SD-HYS
T J for Thermal Shutdown
Hysteresis for Thermal Shutdown
145
10
°C
°C
THERMAL RESISTANCE
θ JA
θ JC
Junction to Ambient
Junction to Case
(3) (4)
See (3)
No air flow
20
1.9
°C/W
°C/W
(1)
(2)
(3)
(4)
Min and Max limits are 100% production tested at an ambient temperature (T A ) of 25°C. Limits over the operating temperature range are
ensured through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality
Level (AOQL).
Typical numbers are at 25°C and represent the most likely parametric normal.
θ JA measured on a 2.25” x 2.25” (5.8 cm x 5.8 cm) four layer board. Refer to PCB Layout Diagrams or Evaluation Board Application
Note: AN-2074 SNVA450 .
θ JA measured on a 2.25” x 2.25” (5.8 cm x 5.8 cm) four layer board, with one ounce copper, thirty six thermal vias, no air flow, and 1W
power dissipation. Refer to Evaluation Board Application Note: AN-2074 SNVA450 .
4
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