SNVS129E – MAY 2004 – REVISED JUNE 2005
All Output Voltage Versions Electrical Characteristics (continued)
Specifications with standard type face are for T
J
= 25°C, and those with
bold type face
apply over
full Operating
Temperature Range.
Unless otherwise specified, V
IN
= 12V for the 3.3V, 5V, and Adjustable versions and V
IN
= 24V for the
12V version, and I
LOAD
= 100 mA.
Symbol
I
L
Parameters
Output Leakage Current
Conditions
V
IN
= 40V, ON/OFF Pin = 0V
V
SWITCH
= 0V
V
SWITCH
=
−1V,
ON/OFF Pin = 0V
R
DS(ON)
f
O
D
I
BIAS
V
S/D
I
S/D
θ
JA
Switch On-Resistance
Oscillator Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Feedback Bias
Current
ON/OFF Pin
Voltage Thesholds
ON/OFF Pin Current
Thermal Resistance
ON/OFF Pin = 0V
P Package, Junction to Ambient
(1)
D Package, Junction to Ambient
(1)
V
FEEDBACK
= 1.3V
ADJ Version Only
I
SWITCH
= 1A
Measured at Switch Pin
Typ
1
6
0.25
260
95
0
85
1.4
20
95
105
0.8
7
2.0
37
225
Min
Max
25
15
0.30/0.50
275
Units
μA
mA
Ω
kHz
%
%
nA
V
μA
°C/W
(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
section in the application note accompanying this
datasheet and the thermal model in
LM267X Made Simple
software (version 6.0). The value
θ
J−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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