LM2927T National Semiconductor, LM2927T Datasheet - Page 3

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LM2927T

Manufacturer Part Number
LM2927T
Description
IC REG NEG W/DELAY RESET TO220-5
Manufacturer
National Semiconductor
Datasheet

Specifications of LM2927T

Regulator Topology
Positive Fixed
Voltage - Output
5V
Voltage - Input
Up to 26V
Voltage - Dropout (typical)
0.35V @ 500mA
Number Of Regulators
1
Current - Output
500mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
*
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-
Other names
*LM2927T

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REGULATOR OUTPUT
Maximum Operational Input
Voltage
Peak Transient Input Voltage
Reverse DC Input Voltage
Reverse Transient Input Voltage
RESET OUTPUT
Threshold
Output Low Voltage
Internal Pull-Up Resistance
Delay Time
Minimum Operational V
on Power Up
Minimum Operational V
on Power Down
DELAY CAPACITOR PIN
Threshold Difference ( V
Charging Current (I
Electrical Characteristics
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Human body model; 100 pF discharged through a 1.5 k
Note 3: The maximum power dissipation is a function of T
any ambient temperature is P
down. For the LM2926 and LM2927, the junction-to-ambient thermal resistance is 53˚C/W, and the junction-to-case thermal resistance is 3˚C/W.
Note 4: Typicals are at T
Note 5: Limits are 100% guaranteed by production testing.
Note 6: Dropout voltage is the input-output differential at which the circuit ceases to regulate against any further reduction in input voltage. Dropout voltage is mea-
sured when the output voltage (V
Note 7: The reset flag is set LOW when the output voltage has dropped an amount, V
V
Typical Performance Characteristics
Output Voltage
IN
= 14.4V, C
Parameter
O
= 10 µF, −40˚C
DELAY
J
= 25˚C and represent the most likely parametric norm.
IN
O
D
)
DELAY
= (T
O
) has dropped 100 mV from the nominal value measured at V
JMAX
DS010759-15
)
–T
A
)/
T
Continuous
V
V
t
I
C
Delayed Reset Output
I
Delay Reset Output
I
Change in Delay Capacitor Voltage Required
for Reset Output to Return High
JA
J
r
SINK
SINK
SINK
V
O
O
DELAY
= 1 ms, R
. If this dissipation is exceeded, the die temperature will rise above 150˚C and the device will go into thermal shut-
O
125˚C, unless otherwise specified.
Required for Reset Condition (Note 7)
7V, R
−0.6V, R
= 1.6 mA, V
= 1.6 mA, R
= 10 µA, V
(Continued)
Low Voltage Behavior
= 10 nF (See Timing Curve)
JMAX
L
L
, and
= 100 , t
= 100
L
= 100
resistor.
IN
Conditions
IN
L
JA
= 0V
= 100
, and T
= 3.2V
0.8V,
f
= 100 ms
0.8V,
A
, and is limited by thermal shutdown. The maximum allowable power dissipation at
3
O
, from the nominal value measured at V
DS010759-16
IN
= 14.4V.
(Note 4)
−250
Output at Voltage Extremes
0.15
3.75
Typ
2.2
0.7
2.0
30
19
(Note 5)
IN
Limit
−400
−18
−50
−80
0.4
3.2
3.5
4.1
1.0
3.0
26
80
= 14.4V.
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mV (max)
mV (min)
µA (max)
µA (min)
DS010759-32
V (max)
V (max)
V (min)
V (min)
V (min)
V (min)
V (min)
V (min)
(Limit)
Units
mV
ms
k
µA
V
V
V

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