LM2675
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SNVS129E –MAY 2004–REVISED JUNE 2005
All Output Voltage Versions Electrical Characteristics (continued)
Specifications with standard type face are for TJ = 25°C, and those with bold type face apply over full Operating
Temperature Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable versions and VIN = 24V for the
12V version, and ILOAD = 100 mA.
Symbol
IL
Parameters
Conditions
Typ
Min
Max
Units
Output Leakage Current
VIN = 40V, ON/OFF Pin = 0V
VSWITCH = 0V
1
25
μA
VSWITCH = −1V, ON/OFF Pin = 0V
ISWITCH = 1A
6
0.25
260
95
15
0.30/0.50
275
mA
Ω
RDS(ON)
Switch On-Resistance
Oscillator Frequency
Maximum Duty Cycle
Minimum Duty Cycle
fO
D
Measured at Switch Pin
225
kHz
%
0
%
IBIAS
VS/D
Feedback Bias
Current
VFEEDBACK = 1.3V
ADJ Version Only
85
nA
V
ON/OFF Pin
Voltage Thesholds
1.4
0.8
7
2.0
37
IS/D
ON/OFF Pin Current
Thermal Resistance
ON/OFF Pin = 0V
20
95
μA
θJA
P Package, Junction to Ambient(1)
°C/W
D Package, Junction to Ambient(1)
105
(1) Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional
copper area will lower thermal resistance further. See Application Information section in the application note accompanying this
datasheet and the thermal model in LM267X Made Simple software (version 6.0). The value θJ−A for the WSON (NHN) package is
specifically dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance
and power dissipation for the WSON package, refer to Application Note AN-1187 (SNOA401).
Copyright © 2004–2005, Texas Instruments Incorporated
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