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LP2989LV Datasheet, PDF (5/11 Pages) National Semiconductor (TI) – Micropower 500 mA Low Noise Low Dropout Regulator for Applications with Output Voltages < 2V Designed for Use with Very Low ESR Output Capacitors
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Electrical Characteristics (Continued)
Limits in standard typeface are for TJ = 25˚C, and limits in boldface type apply over the full operating temperature range. Un-
less otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, COUT = 10 µF, CIN = 2.2 µF, VS/D = 2V.
LP2989AI-X.X
LP2989I-X.X
Symbol
Parameter
Conditions
Typical
(Note 6)
(Note 6)
Units
Min
Max
Min
Max
SHUTDOWN INPUT
VS/D
S/D Input Voltage
IS/D
S/D Input Current
ERROR COMPARATOR
VH = O/P ON
VL = O/P OFF
IIN ≤ 2 µA
VS/D = 0
VS/D = 5V
1.4
1.6
1.6
0.18
0.18
V
0.50
0.001
−1
5
15
−1
µA
15
IOH
Output “HIGH” Leakage VOH = 16V
1
0.001
2
1
µA
2
VOL
Output “LOW” Voltage VOUT = VO(NOM) − 0.5V
150
220
220
mV
IO(COMP) = 150 µA
350
350
VTHR
(MAX)
Upper Threshold
Voltage
−6.0
−3.5
−6.0
−3.5
−4.8
−8.3
−2.5
−8.3
−2.5
VTHR
(MIN)
Lower Threshold
Voltage
−6.6
−8.9
−13.0
−4.9
−3.0
−8.9
−13.0
−4.9
−3.0
%VOUT
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 kΩ resistor.
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJ−A,
and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
The value of θJ−A for the SO-8 (M) package is 160˚C/W and the mini SO-8 (MM) package is 200˚C/W. The value θJ−A 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 LP2989LV 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 25˚C. 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: Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.
Note 8: See Typical Performance Characteristics curves.
5
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