LP38513_14 Datasheet, PDF (3/20 Pages) Texas Instruments – 3A Fast Response Ultra Low Dropout Linear Regulator

LP38513
www.ti.com
SNVS361C – JULY 2007 – REVISED MARCH 2009
Operating Ratings⁽¹⁾
Input Supply Voltage, V_IN
Enable Input Voltage, V_EN
ERROR Pin Voltage
Output Current (DC)
Junction Temperature⁽²⁾
2.25V to 5.5V
0.0V to 5.5V
0.0V to V_IN
0 mA to 3A
−40°C to +125°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but does not ensure specific performance limits. For ensured specifications and conditions,
see the Electrical Characteristics.
(2) Device operation must be evaluated, and derated as needed, based on ambient temperature (T_A), power dissipation (P_D), maximum
allowable operating junction temperature (T_J(MAX)), and package thermal resistance (θ_JA).
Electrical Characteristics
Unless otherwise specified: V_IN = 2.5V, I_OUT = 10 mA, C_IN = 10 µF, C_OUT = 10 µF, V_EN = 2.0V. Limits in standard type are for
T_J = 25°C only; limits in boldface type apply over the junction temperature (T_J) range of -40°C to +125°C. Minimum and
Maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely
parametric norm at T_J = 25°C, and are provided for reference purposes only.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V_OUT
Output Voltage Tolerance⁽¹⁾
ΔV_OUT/ΔV_IN
Output Voltage Line
Regulation ^{(2) (1)}
2.25V ≤ V_IN ≤ 5.5V
10 mA ≤ I_OUT ≤ 3A
2.25V ≤ V_IN ≤ 5.5V
10 mA ≤ I_OUT ≤ 3A
0°C ≤ T_J ≤ 125°C
2.25V ≤ V_IN ≤ 5.5V
-1.6
−4.1
0
+1.6
+2.6
%
-2.6
0
+2.6
-
0.03
0.06
-
%/V
ΔV_OUT/ΔI_OUT
V_DO
Output Voltage Load
Regulation ^{(3) (1)}
Dropout Voltage⁽⁴⁾
I_GND
Ground Pin Current, Output
Enabled
10 mA ≤ I_OUT ≤ 3A
I_OUT = 3A
I_OUT = 10 mA
ERROR pin = GND
I_OUT = 3A
ERROR pin = GND
-
0.10
0.20
-
%/A
-
-
425.
mV
-
10
12
15
mA
-
12
15
20
Ground Pin Current, Output
Disabled
V_EN = 0.50V
ERROR pin = GND
-
60
100
110
µA
I_SC
Short Circuit Current
Enable Input
V_OUT = 0V
-
5.6
-
A
V_EN(TH)
Enable On/Off Threshold
V_EN rising from 0.0V until the output
turns On, or V_EN falling from ≥ 2.0V
until the output turns Off
0.74
0.56
0.85
0.92
1.00
V
t_d(OFF)
t_d(ON)
I_EN
Turn-off delay
Turn-on delay
Enable Pin Current
Time from V_EN < V_EN(TH) to V_OUT =
OFF, I_LOAD = 3A
-
5
-
µs
Time from V_EN >V_EN(TH) to V_OUT =
ON, I_LOAD = 3A
-
5
-
V_EN = V_IN
V_EN = 0V
-
1
-
nA
-
-1
-
(1) The line and load regulation specification contains only the typical number. However, the limits for line and load regulation are included
in the output voltage tolerance specification.
(2) Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the voltage at the
input.
(3) Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in the load current at the
output.
(4) Dropout voltage (V_DO) is typically defined as the input to output voltage differential (V_IN - V_OUT) where the input voltage is low enough to
cause the output voltage to drop 2% from the nominal value. For the LP38513, the minimum operating voltage of 2.25V is the limiting
factor and the maximum dropout voltage is defined as: V_DO(MAX) = V_IN(MIN) - V_OUT(MIN) = (i.e. 2.25V - (1.80V x 95.9%) = 524 mV)
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