If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage
Input Voltage (transient, t≤400mS)
Forced Output Voltages
Main Output
External Supply Output
ON/OFF Input Voltage(Note 6)
ON/OFF Input Current
Keep Alive In, Reset Out, C
DELAY
,
Reset Adjust,Watchdog Trigger
−45V to 45V
60V
−0.3V to 7V
−0.3V to 27V
−0.3V to 16V
±
20mA
In, C Watchdog
Junction Temperature
Storage Temperature
ESD Susceptibility(Note 2)
Lead temperature (Soldering, 10 Sec)
−0.3V to 7V
150˚C
−65˚C to 150˚C
2000V
265˚C
Operating Ratings
(Note 1)
Input Voltage Range
Ambient Temperature Range
Thermal Resistance
θ
JC
θ
JA
6V to 27V
−40˚C to 125˚C
4˚C/W
43˚C/W
Electrical Characteristics
The following specifications apply for 6V
≤
v
IN
≤
19V, t
CASE
= 25˚C unless otherwise specified. C
OUT
≥
6µF with 0.3Ω
≤
ESR
≤
0.3Ω on each regulator output.
Symbol
MAIN REGULATOR
10mA
≤
I
LOAD
≤
700mA
V
MAIN
Output Voltage
19V
≤
V
IN
≤
V
SD
,
5mA
≤
I
LOAD
≤
700mA
V
IN
= 16V, 10mA
≤
I
LOAD
≤
700mA
I
LOAD
= 700mA, 8V
≤
V
IN
≤
16V
V
IN
>
5.5V, 10mA
≤
I
LOAD
≤
700mA(Note 5)
30
R
L
= 1Ω
V
IN
= 9V, 50Hz
≤
freq
≤
20kHZ,
V
RIPPLE
= 4V
P−P
3mA
≤
I
LOAD
≤
100mA
19V
≤
V
IN
≤
V
SD
3mA
≤
I
LOAD
≤
100mA
R
ELOAD
R
ELINE
V
EDO
V
SD
I
ESC
V
ESC
PSRR
Input Current
I
QOFF
I
Q
Quiescent Input Current with
Both Regulators OFF.
No Load Quiescent Current
8V
≤
V
IN
≤
16V
16V
≤
V
IN
≤
42V
8V
≤
V
IN
≤
19V, I
L
= 0mA
100
10
15
µA
mA
mA
Load Regulation
Line Regulation
Dropout voltage, V
IN
− V
EXT
Overvoltage Shutdown
Threshold
Output Short Circuit Current
Output Short Circuit
Ripple Rejection
R
L
= 1Ω
No effect on other functions
V
IN
= 9V, 50Hz
≤
freq
≤
20kHZ,
V
RIPPLE
= 4V
PP
−0.3
40
V
IN
= 16V, 3mA
≤
I
LOAD
≤
100mA
I
LOAD
= 100mA, 8V
≤
V
IN
≤
16V
V
IN
>
5.5V, 3mA
≤
I
LOAD
≤
100mA (Note 5)
30
40
4.9
4.8
5.1
5.2
25
25
1
36
2000
V
V
mV
mV
V
V
mA
dB
Parameter
Conditions
LM9073
Min
Max
Units
R
MLOAD
R
MLINE
V
MDO
V
SD
I
MSC
PSRR
Load Regulation
Line Regulation
Dropout Voltage, V
IN
− V
MAIN
Overvoltage Shutdown
Threshold
Output Short Circuit Current
Ripple Rejection
External Supply Regulator
V
EXT
Output Voltage
4.9
4.8
5.1
5.2
25
25
0.8
36
250
27
V
V
mV
mV
V
V
mA
V
dB
3
www.national.com
LM9073
Electrical Characteristics
(Continued)
The following specifications apply for 6V
≤
v
IN
≤
19V, t
CASE
= 25˚C unless otherwise specified. C
OUT
≥
6µF with 0.3Ω
≤
ESR
≤
0.3Ω on each regulator output.
Symbol
Input Current
Additional Input Current with
both Regulators ON
V
IN
≥
8V, I
LTOTAL
= I
MAIN
+
I
LEXT
I
LTOTAL
= 700mA + 100mA =
800mA
0V
<
V
IN
<
8V, (Note 4)
I
LTOTAL
= I
MAIN
+ I
LEXT
I
LTOTAL
= 700mA + 100mA =
800mA
V
MAIN
output controls Reset
Reset Adjust (pin 11 )open
circuited
Reset Adjust (pin 11) shorted to
ground
V
THRH
V
LOW
V
HIGH
R
P−U
T
DELAY
T
RISE
T
FALL
Watchdog
V
TRIGL
V
TRIGR
T
WD
T
PW
R
TRIG
Trigger Input Logic Low Voltage
Trigger Input Logic High Level
C
WATCHDOG
= 0.1µF (low
leakage)
I
WATCHDOG
for charging the
watchdog
2
.08
V
V
High Switching Threshold
Logic Low Output Threshold
V
MAIN
output controls Reset
1V
≤
V
MAIN
≤
V
THRL
R
RESET
= 50kΩ to V
MAIN
Normal opeation,
V
THRL
≤
V
MAIN
≤
THRH
,, I
=0
C
DELAY
= 0.1µF
From 10% V
MAIN
to 90% V
MAIN
C
LRESET
= 50pF
From 90% V
MAIN
to 10% V
MAIN
C
LRESET
= 50pF
SOURCE
Parameter
Conditions
LM9073
Min
Max
Units
IN
ON
1.2
X
I
LTOTAL
X
LIN
DO
Reset Output
Additional Input Current when in
Dropout
1.5
I
LTOTAL
4.0
4.2
V
V
THRL
Low Switching Threshold
4.5
5.35
4.7
5.75
0.4
V
V
V
Logic High Output Threshold
Internal Pull-Up Resistance
Reset Delay Interval
Output Rise Time
Output Fall Time
V
MAIN
−50mV
2.4
35
V
MAIN
6.0
70
1.5
0.5
V
kΩ
mS
µS
µS
Watchdog Refresh Window
35
70
mS
Watchdog Trigger Pulse Width
Trigger Input Pull-down
Resistance
ON Threshold for ON/OFF Input
OFF Threshold for ON/OFF
Inpu
ON/OFF Input Current
Turn ON Threshold for Keep
Alive Input
Turn OFF Threshold for Keep
Alive Input
Pull−Down Resistance at Keep
Alive Input
(Note 3)
0V
≤
V
K−A
≤
5V
Rseries = 22kΩ
Rseries = 22kΩ (Note 3)
1.4V
≤
V
ON/OFF
≤
4.5V
−0.3V
≤
V
ON/OFF
≤
7V(Note 6)
10
5
40
µS
kΩ
Control Inputs
V
ON
V
OFF
I
ON/OFF
3.5
1.5
1
−1
2
0.8
5
40
4.5
2.5
12
5
V
V
µA
mA
V
V
kΩ
ON
K−A
OFF
K−A
R
P−D
www.national.com
4
LM9073
Electrical Characteristics
(Continued)
Note 1:
“Absolute Maximum Ratings”
indicate limits beyond which damage to the device may occur.
“Operating Ratings”
indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
“Electrical Characteristics”
state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 2:
Human body model, 150 pFcapacitor discharged through a 1.5 kΩ resistor.
Note 3:
If either control input is left open circuited the regulators will turn OFF.
Note 4:
The input quiescent current will increase when the regulators are in dropout conditions. The amount of additional input current is a direct function of the to
a load current on both outputs. The peak increase in current is limited to 50% of the total load current.
Note 5:
The dropout voltage specifications actually indicate the saturation voltage of the PNP power transistors used in each regulator. Over the full load current and
temperature ranges the Main regulator will output at least 4.5V and the External Supply regulator at lease 4.7V with an input voltage of only 5.5V
Note 6:
The ON/OFF input is internally clamped to a 7V zener diode through a 1KΩ resistor.
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