lm9072 National Semiconductor Corporation, lm9072 Datasheet - Page 3

• Manufacturer Part Number: lm9072
• Description: Dual Tracking Low-dropout System Regulator
• Manufacturer: National Semiconductor Corporation

Symbol
INPUT CURRENT
Iin
RESET OUTPUT
V
V
V
V
R
T
T
T
CONTROL INPUTS
V
V
I
ON
OFF
R
ON/OFF
Electrical Characteristics
6.0V
DELAY
RISE
FALL
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device
remains functional but do not guarantee specific performance limits. For guaranteed specifications and test conditions see the Electrical Characteristics.
Note 2: Human body model, 150 pF capacitor discharged through a 1.5 k
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 currents is a direct function of the
total 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 both regulators will output at least 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 1 k
Note 7: Exceeding the Maximum Allowable power dissipation will cause excessive die temperature, and the device will go into thermal shutdown. The
methods.
Note 8: Exceeding the Maximum Allowable power dissipation will cause excessive die temperature, and the device will go into thermal shutdown. The
board area that is connected (soldered) to the package tab. Using 1 ounce (1.4 mils thick) copper clad with no solder mask, an area of 0.5 square inches will reduced
uses a solder mask, the copper clad area should be increased by at least 50% to maintain a similar
Note 9: Datasheet min/max specifications are guaranteed by design, test, and/or statistical analysis.
THRL
THRH
LOW
HIGH
ON
OFF
for the TO-220 package (still air, no additional heat sink) is 73˚C/W. The effective
for the TO-263 package (still air, no additional heat sink) is 80˚C/W. The effective
P-U
P-D
do
J-A
K-A
K-A
to 50˚C/W, an area of 1.0 square inches will reduced
V
IN
Parameter
Additional Input Current in Dropout
Low Switching Threshold
High Switching Threshold
Logic Low Output Voltage
Logic High Output Voltage
Internal Output Pull-Up Resistance
Reset Delay Interval
Output Rise Time
Output Fall Time
ON Threshold for ON/OFF Input
OFF Threshold for ON/OFF Input
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
19V, T
CASE
= 25˚C, unless otherwise specified. C
(Note 9) (Continued)
J-A
to 37˚C/W, ad an area of 1.6 square inches will reduced
Conditions
0V
I
I
V
V
1V
R
Normal Operation,
V
C
I
Capacitor is Typically 6 µA
From 10% V
C
From 90% V
C
R
R
1.4V
−0.3V
(Note 3)
0V
Ltotal
Ltotal
DELAY
MAIN
MAIN
RESET
THRL
DELAY
LRESET
LRESET
SERIES
SERIES
<
V
V
= I
= 350 mA + 80 mA = 430 mA
V
Output Controls Reset
Output Controls Reset
MAIN
K-A
for Charging the Delay
V
IN
= 0.1 µF (Low Leakage),
= 50 k
Lmain
V
V
ON/OFF
resistor.
= 22 k
= 22 k
= 50 pF
= 50 pF
<
ON/OFF
MAIN
3
OUT
J-A
J-A
8V, (Note 4)
5V
MAIN
MAIN
+ I
V
value of the TO-220 package can be reduced by using conventional heat sink
value of the TO-263 package can be reduced by increasing the printed circuit
THRL
resistor.
Ltrack
to V
V
to 90% V
to 10% V
(Note 3)
6 µF with 0.3
4.5V
THRH
7V (Note 6)
,
MAIN
, I
SOURCE
MAIN
MAIN
J-A
rating.
= 0
ESR
3
J-A
V
50 mV
4.45
5.40
MAIN
Min
2.4
3.5
1.5
to 32˚C/W. If the printed circuit board
−1
35
on each regulator output.
1
2
5
–
V
Max
4.75
5.75
1.5
0.4
6.0
1.5
0.5
4.5
2.5
0.8
MAIN
70
12
40
5
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J-A
J-A
x I
Units
mA
ms
value
value
k
µA
k
µs
µs
Ltotal
V
V
V
V
V
V
V
V