Datasheet
LP2997
www.ti.com
SNVS295F –MAY 2004–REVISED APRIL 2013
Electrical Characteristics
Specifications with standard typeface are for T
J
= 25°C and limits in boldface type apply over the full Operating
Temperature Range (T
J
= 0°C to +125°C)
(1)
. Unless otherwise specified, AVIN = 2.5V, PVIN = 1.8V, VDDQ = 1.8V.
Symbol Parameter Conditions Min Typ Max Units
V
REF
V
REF
Voltage PVIN = VDDQ = 1.7V 0.837 0.860 0.887
PVIN = VDDQ = 1.8V 0.887 0.910 0.937 V
PVIN = VDDQ = 1.9V 0.936 0.959 0.986
Z
VREF
V
REF
Output Impedance I
REF
= -30 to +30 μA 2.5 kΩ
V
TT
V
TT
Output Voltage I
OUT
= 0A
PVIN = VDDQ = 1.7V 0.822 0.856 0.887
PVIN = VDDQ = 1.8V 0.874 0.908 0.939
PVIN = VDDQ = 1.9V 0.923 0.957 0.988
V
I
OUT
= ±0.5A
(2)
PVIN = VDDQ = 1.7V 0.828 0.856 0.890
PVIN = VDDQ = 1.8V 0.878 0.908 0.940
PVIN = VDDQ = 1.9V 0.928 0.957 0.990
Vos
TT
/V
TT
V
TT
Output Voltage Offset I
OUT
= 0A -25 0 25
(V
REF
-V
TT
) I
OUT
= -0.5A -25 0 25 mV
I
OUT
= +0.5A -25 0 25
I
Q
Quiescent Current
(3)
I
OUT
= 0A
(3)
320 500 µA
Z
VDDQ
VDDQ Input Impedance 100 kΩ
I
SD
Quiescent Current in SD = 0V 115 150 µA
Shutdown
(3)
I
Q_SD
Shutdown Leakage Current SD = 0V 2 5 µA
V
IH
Minimum Shutdown High 1.9 V
Level
V
IL
Maximum Shutdown Low 0.8 V
Level
I
SENSE
V
SENSE
Input Current 13 nA
T
SD
Thermal Shutdown See
(4)
165 Celsius
T
SD
_HYS Thermal Shutdown 10 Celsius
Hysteresis
(1) Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation using
Statistical Quality Control (SQC) methods. The limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) V
TT
load regulation is tested by using a 10 ms current pulse and measuring V
TT
.
(3) Quiescent current defined as the current flow into AVIN.
(4) 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
. Exceeding the maximum allowable power dissipation will cause excessive die
temperature and the regulator will go into thermal shutdown.
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