Datasheet

LP3999
SNVS207E –JUNE 2003–REVISED MAY 2013 www.ti.com
Operating Ratings
(1)
Input Voltage (V
IN
) 2.5 to 6.0V
Enable Input Voltage 0 to 6.0V
Junction Temperature −40 to +125°C
Ambient Temperature Range
(2)
-40 to 85°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is ensured. Operating Ratings do not imply ensured performance limits. For ensured performance limits and
associated test conditions, see the Electrical Characteristics tables.
(2) In applications where high power dissipation and/or poor thermal resistance is present, the maximum ambient temperature may have to
be derated. Maximum ambient temperature (T
A(max)
) is dependant on the maximum operating junction temperature (T
J(max-op)
), the
maximum power dissipation (P
D(max)
), and the junction to ambient thermal resistance in the application (θ
JA
). This relationship is given
by:
T
A(max)
= T
J(max-op)
− (P
D(max)
× θ
JA
).
Thermal Properties
(1)
Junction to Ambient Thermal Resistance
θ
JA
(DSBGA pkg.) 255°C/W
(1) Junction to ambient thermal resistance is highly dependant on the application and board layout. In applications where high thermal
dissipation is possible, special care must be paid to thermal issues in the board design.
Electrical Characteristics
Unless otherwise noted, V
EN
= 1.5, V
IN
= V
OUT(NOM)
+ 1.0V, C
IN
= 1 µF, I
OUT
= 1 mA, C
OUT
= 1 µF, C
BP
= 0.01 µF. Typical
values and limits appearing in normal type apply for T
J
= 25°C. Limits appearing in boldface type apply over the full
temperature range for operation, −40 to +125°C.
(1) (2)
Limit
Symbol Parameter Conditions Typical Units
Min Max
V
IN
Input Voltage 2.5 6.0 V
DEVICE OUTPUT: 1.5 ≤ V
OUT
< 1.8V
ΔV
OUT
Output Voltage Tolerance I
OUT
= 1 mA −50 50
mV
-75 75
Line Regulation Error V
IN
= (V
OUT(NOM)
+1.0V) to 6.0V,
−3.5 3.5 mV/V
I
OUT
= 1 mA
Load Regulation Error I
OUT
= 1 mA to 150 mA 10 75 µV/mA
PSRR Power Supply Rejection Ratio
(3)
f = 1 kHz, I
OUT
= 1 mA 58
dB
f = 10 kHz, I
OUT
= 1 mA 58
DEVICE OUTPUT: 1.8 ≤ V
OUT
< 2.5V
ΔV
OUT
Output Voltage Tolerance I
OUT
= 1 mA -50 50
mV
−75 75
Line Regulation Error V
IN
= (V
OUT(NOM)
+1.0V) to 6.0V,
−2.5 2.5 mV/V
I
OUT
= 1 mA
Load Regulation Error I
OUT
= 1 mA to 150 mA 10 75 µV/mA
PSRR Power Supply Rejection Ratio
(3)
f = 1 kHz, I
OUT
= 1 mA 60
dB
f = 10 kHz, I
OUT
= 1 mA 60
DEVICE OUTPUT: 2.5 ≤ V
OUT
≤ 3.3V
ΔV
OUT
Output Voltage Tolerance I
OUT
= 1 mA -2 2
% of
V
OUT(NOM)
−3 3
Line Regulation Error V
IN
= (V
OUT(NOM)
+1.0V) to 6.0V,
−0.1 0.1 %/V
I
OUT
= 1 mA
Load Regulation Error I
OUT
= 1 mA to 150 mA 0.0004 0.002 %/mA
(1) All limits are ensured. All electrical characteristics having room-temperature limits are tested during production at T
J
= 25°C or correlated
using Statistical Quality Control methods. Operation over the temperature specification is ensured by correlating the electrical
characteristics to process and temperature variations and applying statistical process control.
(2) V
OUT(NOM)
is the stated output voltage option for the device.
(3) This electrical specification is ensured by design.
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