LM26400Y
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
AVIN, PVIN
SWx Voltage
BSTx Voltage
BSTx to SW Voltage
FBx Voltage
ENx Voltage (Note 2)
−0.5V to 22V
−0.5V to 22V
−0.5V to 26V
−0.5V to 6V
−0.5V to 3V
−0.5V to 22V
SSx Voltage
Junction Temperature
ESD Susceptibility
Human Body Model (Note 3)
Storage Temperature Range
−0.5V to 3V
+150°C
2kV
-65°C to 150°C
(Note 1)
3V to 20V
−40°C to +125°C
Operating Ratings
V
IN
Junction Temperature
Electrical Characteristics
Unless otherwise stated, the following conditions apply: AVIN = PVIN = V
IN
= 5V. Limits in standard type are for T
J
= 25°C only;
limits in
boldface type
apply over the junction temperature (T
J
) range of -40°C to 125°C. Minimum and Maximum limits are
guaranteed 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.
Symbol
V
FB
Parameter
Conditions
0°C to 85°C. Feedback Loop Closed.
Voltages at FB1 and FB2 Pins -40°C to 125°C. Feedback Loop
Closed.
Line Regulation of FB1 and FB2
Voltages, Expressed as PPM
V
IN
= 3V to 20V
Change Per Volt of V
IN
Variation
Current in FB1 and FB2 Pins
Under Voltage Lockout
Threshold
Hysteresis of UVLO Threshold
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
ON Resistance of Internal
Power MOSFET
Peak Current Limit of Internal
MOSFET
Shutdown Current of AVIN Pin EN1 = EN2 = 0V
Quiescent Current of AVIN Pin
(both channels are enabled but EN1 = EN2 = 5V, FB1 = FB2 = 0.7V
not switching)
Input Logic High of EN1 and
EN2 Pins
Input Logic Low of EN1 and
EN2 Pins
EN1 and EN2 Currents (sink or
source)
Switch Leakage Current
Measured at SW1 and SW2
Pins
EN1 = EN2 = SWx = 0
5
2.5
0.4
ETSSOP, 2A Drain Current
LLP, 2A Drain Current
2.5
V
FB
= 0.6V
V
IN
Rises From 0V
V
IN
Falls From 3.3V
2.0
0.2
0.39
90
Min
0.591
0.585
0.6
Typ
Max
0.611
0.617
V
Units
ΔV
FB_LINE
I
FB
V
UVLO
V
UVLO_HYS
f
SW
D
MAX
D
MIN
R
DS_ON
I
CL
I
SD
I
Q
V
EN_IH
V
EN_IL
I
EN
I
SW_LEAK
ΔΦ
I
SS
66
ppm/V
0.4
2.7
2.3
0.36
0.52
96
2
175
194
3
2
250
2.9
0.55
0.65
nA
V
V
MHz
%
%
320
350
4.5
mΩ
A
nA
4
mA
V
V
nA
1
µA
Phase Shift Between SW1 and Feedback Loop Closed. Continuous
SW2 Rising Edges
Conduction Mode.
SSx Pin Current
170
11
180
16
190
21
deg
µA
www.national.com
4
NSC [ NATIONAL SEMICONDUCTOR ]
