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參數(shù)資料
| 型號： | LP2989ILD-5.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capacitors |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.65 V DROPOUT, PDSO8 |
| 封裝： | LLP-8 |
| 文件頁數(shù)： | 7/19頁 |
| 文件大?。?/td> | 616K |
| 代理商： | LP2989ILD-5.0 |
Electrical Characteristics
(Continued)
Limits in standard typeface are for T
= 25C, and limits in
boldface type
apply over the full operating temperature range. Un-
less otherwise specified: V
IN
= V
O
(NOM) + 1V, I
L
= 1 mA, C
OUT
= 4.7 μF, C
IN
= 2.2 μF, V
S/D
= 2V.
Symbol
Parameter
Conditions
Typical
LP2989AI-X.X
(Note 6)
Min
LP2989I-X.X
(Note 6)
Min
Units
Max
Max
Ripple Rejection
f = 1 kHz, C
OUT
= 10 μF
60
dB
Output Voltage
Temperature Coefficient
(Note 8)
20
ppm/C
SHUTDOWN INPUT
V
S/D
S/D Input Voltage
V
H
= O/P ON
V
L
= O/P OFF
I
IN
≤
2 μA
V
S/D
= 0
V
S/D
= 5V
1.4
1.6
1.6
V
0.50
0.18
0.18
I
S/D
S/D Input Current
0.001
5
1
15
1
15
μA
ERROR COMPARATOR
I
OH
Output “HIGH” Leakage
V
OH
= 16V
0.001
1
2
1
2
μA
V
OL
Output “LOW” Voltage
V
IN
= V
O
(NOM) 0.5V,
I
O
(COMP) = 150 μA
150
220
350
3.5
2.5
4.9
3.0
220
350
3.5
2.5
4.9
3.0
mV
V
THR
(MAX)
Upper Threshold Voltage
4.8
6.0
8.3
8.9
13.0
6.0
8.3
8.9
13.0
%V
OUT
V
THR
(MIN)
Lower Threshold Voltage
6.6
HYST
Hysteresis
2.0
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the
device outside of its rated operating conditions.
Note 2:
ESD testing was performed using Human Body Model, a 100 pF capacitor discharged through a 1.5 k
resistor.
Note 3:
The maximum allowable power dissipation is a function of the maximum junction temperature, T
J
(MAX), the junction-to-ambient thermal resistance,
θ
JA
,
and the ambient temperature, T
A
. The maximum allowable power dissipation at any ambient temperature is calculated using:
The value of
θ
for the SO-8 (M) package is 160C/W and the mini SO-8 (MM) package is 200C/W. The value
θ
for the LLP (LD) package is specifically
dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance and power dissipation for the LLP
package, refer toApplication NoteAN-1187. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into
thermal shutdown.
Note 4:
If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2989 output must be diode-clamped to ground.
Note 5:
The output PNP structure contains a diode between the V
IN
and V
OUT
terminals that is normally reverse-biased. Forcing the output above the input will turn
on this diode and may induce a latch-up mode which can damage the part (see Application Hints).
Note 6:
Limits are 100% production tested at 25C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 7:
Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a 1V differential.
Note 8:
Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.
Note 9:
See Typical Performance Characteristics curves.
L
www.national.com
7
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