LP38512_15 Datasheet, PDF (3/21 Pages) Texas Instruments – 1.5A Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag

LP38512
www.ti.com
SNOSAU7F – NOVEMBER 2007 – REVISED APRIL 2013
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 1.5A
−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 = V_IN. 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
ΔV_OUT/ΔV_IN
Output Voltage Tolerance⁽¹⁾
Output Voltage Line Regulation
(2) (1)
2.25V ≤ V_IN ≤ 5.5V
10 mA ≤ I_OUT ≤ 1.5A
2.25V ≤ V_IN ≤ 5.5V
-1.0
−2.5
0
+1.0
+2.5
%
-
0.02
0.06
-
%/V
ΔV_OUT/ΔI_OUT
Output Voltage Load
Regulation^{(3) (1)}
10 mA ≤ I_OUT ≤ 1.5A
-
0.25
0.40
-
%/A
V_DO
Dropout Voltage⁽⁴⁾
I_OUT = 1.5A
-
250
340
400
mV
I_GND
Ground Pin Current, Output
Enabled
I_OUT = 10 mA
ERROR pin = GND
I_OUT = 1.5A
ERROR pin = GND
-
7.5
11
12
mA
-
9.5
13
14
Ground Pin Current, Output
Disabled
V_EN = 0.50V
ERROR pin = GND
-
0.1
3.5
12
µA
I_SC
Short Circuit Current
Enable Input
V_OUT = 0V
-
2.5
-
A
V_EN(ON)
Enable ON Threshold
V_EN rising from 0.50V until V_OUT =
ON
0.90
0.80
1.20
1.50
1.60
V
V_EN(OFF)
Enable OFF Threshold
V_EN falling from 1.60V until V_OUT =
OFF
0.60
0.50
1.00
1.40
1.50
V_EN(HYS)
t_d(OFF)
t_d(ON)
Enable Hysteresis
Turn-off delay
Turn-on delay
I_EN
ERROR Flag
Enable Pin Current
V_EN(ON) - V_EN(OFF)
-
200
-
mV
Time from V_EN < V_EN(OFF) to V_OUT =
OFF, I_LOAD = 1.5A
-
1
-
µs
Time from V_EN >V_EN(ON) to V_OUT =
ON, I_LOAD = 1.5A
-
25
-
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 (ΔV_OUT) due to a change in the voltage
at the input (ΔV_IN).
(3) Output voltage load regulation is defined as the change in output voltage from the nominal value (ΔV_OUT) due to a change in the load
current at the output (ΔI_OUT).
(4) Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. For
the LP38512-1.8 the minimum V_IN operating voltage is the limiting factor.
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