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参数资料
| 型号： | LP2988AILD-5 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | Micropower, 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988) |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.35 V DROPOUT, PDSO8 |
| 封装： | LLP-8 |
| 文件页数： | 2/23页 |
| 文件大小： | 1033K |
| 代理商： | LP2988AILD-5 |
Electrical Characteristics (Continued)
Limits in standard typeface are for T
J = 25C, and limits in boldface type apply over the full operating temperature range. Un-
less otherwise specified: V
IN =VO(NOM) + 1V, IL = 1 mA, COUT = 4.7 F, CIN = 2.2 F, VS/D = 2V.
Symbol
Parameter
Conditions
Typical
LM2987/8AI-X.X
LM2987/8I-X.X
Units
Min
Max
Min
Max
I
DELAY
Delay Pin Current
Source
2.2
1.6
2.8
1.6
2.8
A
1.4
3.0
1.4
3.0
SHUTDOWN INPUT
V
S/D
S/D Input Voltage
V
H = O/P ON
1.4
1.6
V
L = O/P OFF
0.55
0.18
I
S/D
S/D Input Current
V
S/D =0
0
1
A
V
S/D =5V
5
15
ERROR COMPARATOR
I
OH
Output “HIGH” Leakage
V
OH = 16V
0.01
11
A
22
V
OL
Output “LOW” Voltage
V
IN =VO(NOM) 0.5V,
I
O(COMP) = 300 A
150
220
mV
350
V
THR
(MAX)
Upper Threshold Voltage
4.6
5.5
3.5
5.5
3.5
%V
OUT
7.7
2.5
7.7
2.5
V
THR
(MIN)
Lower Threshold Voltage
6.6
8.9
4.9
8.9
4.9
13.0
3.3
13.0
3.3
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: The ESD rating of the Bypass pin is 500V (LP2988 only). The ESD rating of the VIN pin is 1kV and the Delay pin is ESD rated at 1.5kV.
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJA,
and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
The value of
θJA for the SO-8 (M) package is 160C/W, and the mini SO-8 (MM) package is 200C/W. The value θJA 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 to Application Note AN-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 LM2987/8 output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the VIN and VOUT 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: To prevent mis-operation, the Shutdown input must be driven by a signal that swings above VH and below VL with a slew rate not less than 40 mV/s (see
Application Hints).
Note 9: Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.
Note 10: See Typical Performance Characteristics curves.
LP2987/LP2988
www.national.com
10
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