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參數資料
| 型號： | LM2926 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 無電容，NMOS管，150mA的低壓差穩壓器的反向電流保護 |
| 文件頁數： | 3/10頁 |
| 文件大小： | 404K |
| 代理商： | LM2926 |
Electrical Characteristics
(Continued)
V
IN
= 14.4V, C
O
= 10 μF, 40C
≤
T
J
≤
125C, unless otherwise specified.
Parameter
Conditions
Typ
Limit
(Note 5)
Units
(Limit)
(Note 4)
REGULATOR OUTPUT
Maximum Operational Input
Voltage
Peak Transient Input Voltage
Reverse DC Input Voltage
Reverse Transient Input Voltage
RESET OUTPUT
Threshold
Continuous
26
V (min)
V
O
≤
7V, R
L
= 100
, t
f
= 100 ms
V
O
≥
0.6V, R
L
= 100
t
r
= 1 ms, R
L
= 100
80
18
50
V (min)
V (min)
V (min)
V
O
Required for Reset Condition (Note 7)
80
mV (min)
mV
mV (max)
250
400
Output Low Voltage
I
SINK
= 1.6 mA, V
IN
= 3.2V
0.15
0.4
V (max)
k
ms
V
V (min)
V
Internal Pull-Up Resistance
Delay Time
Minimum Operational V
IN
on Power Up
Minimum Operational V
O
on Power Down
DELAY CAPACITOR PIN
Threshold Difference (
V
DELAY
)
30
19
2.2
C
DELAY
= 10 nF (See Timing Curve)
Delayed Reset Output
≤
0.8V,
I
SINK
= 1.6 mA, R
L
= 100
Delay Reset Output
≤
0.8V,
I
SINK
= 10 μA, V
IN
= 0V
3.2
0.7
Change in Delay Capacitor Voltage Required
for Reset Output to Return High
3.5
V (min)
V
V (max)
μA (min)
μA
μA (max)
3.75
4.1
1.0
Charging Current (I
DELAY
)
2.0
3.0
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
resistor.
Note 3:
The maximum power dissipation is a function of T
, and
θ
, and T
, and is limited by thermal shutdown. The maximum allowable power dissipation at
any ambient temperature is P
= (T
–T
)/
θ
. If this dissipation is exceeded, the die temperature will rise above 150C and the device will go into thermal shut-
down. For the LM2926 and LM2927, the junction-to-ambient thermal resistance is 53C/W, and the junction-to-case thermal resistance is 3C/W.
Note 4:
Typicals are at T
J
= 25C and represent the most likely parametric norm.
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
O
) has dropped 100 mV from the nominal value measured at V
IN
= 14.4V.
Note 7:
The reset flag is set LOW when the output voltage has dropped an amount,
V
O
, from the nominal value measured at V
IN
= 14.4V.
Typical Performance Characteristics
Output Voltage
DS010759-15
Low Voltage Behavior
DS010759-16
Output at Voltage Extremes
DS010759-32
3
www.national.com
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