LP2989AIM-5.0 Datasheet, PDF (7/19 Pages) Texas Instruments – LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout RegulatorFor Use with Ceramic Output Capacitors

Electrical Characteristics (Continued)
Limits in standard typeface are for T_J = 25˚C, 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.
LP2989AI-X.X
LP2989I-X.X
Symbol
Parameter
Conditions
Typical
(Note 6)
(Note 6)
Units
Min
Max
Min
Max
Ripple Rejection
f = 1 kHz, C_OUT = 10 µF
60
dB
Output Voltage
(Note 8)
Temperature Coefficient
20
ppm/˚C
SHUTDOWN INPUT
V_S/D
S/D Input Voltage
I_S/D
S/D Input Current
ERROR COMPARATOR
I_OH
Output “HIGH” Leakage
V_H = O/P ON
V_L = O/P OFF
I_IN ≤ 2 µA
V_S/D = 0
V_S/D = 5V
V_OH = 16V
V_OL
V_THR
(MAX)
V_THR
(MIN)
HYST
Output “LOW” Voltage
Upper Threshold Voltage
V_IN = V_O(NOM) − 0.5V,
I_O(COMP) = 150 µA
Lower Threshold Voltage
Hysteresis
1.4
1.6
0.50
0.001
5
0.001
150
−4.8
−6.6
2.0
−6.0
−8.3
−8.9
−13.0
0.18
−1
15
1
2
220
350
−3.5
−2.5
−4.9
−3.0
1.6
−6.0
−8.3
−8.9
−13.0
0.18
−1
15
1
2
220
350
−3.5
−2.5
−4.9
−3.0
V
µA
µA
mV
%V_OUT
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, T_J(MAX), the junction-to-ambient thermal resistance, θ_J−A,
and the ambient temperature, T_A. The maximum allowable power dissipation at any ambient temperature is calculated using:
The value of θ_J−A for the SO-8 (M) package is 160˚C/W and the mini SO-8 (MM) package is 200˚C/W. The value θ_J−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 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 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: 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.
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