LP38511_14 Datasheet, PDF (3/19 Pages) Texas Instruments – 800 mA Fast-Transient Response Low-Dropout Linear Voltage Regulator with Error Flag

LP38511
www.ti.com
SNOSAU6D – NOVEMBER 2007 – REVISED MARCH 2009
OPERATING RATINGS⁽¹⁾ (continued)
Output Current (DC)
Junction Temperature⁽²⁾
0 mA to 800 mA
−40°C to +125°C
(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 ^{(1) (2)}
2.25V ≤ V_IN ≤ 5.5V
10 mA ≤ I_OUT ≤ 800 mA
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 ^{(1) (3)}
10 mA ≤ I_OUT ≤ 800 mA
-
0.25
0.40
-
%/A
V_DO
Dropout Voltage⁽⁴⁾
I_OUT = 800 mA
-
135
225
260
mV
I_GND
Ground Pin Current, Output
Enabled
I_OUT = 10 mA
ERROR pin = GND
I_OUT = 800 mA
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
-
1.5
-
A
V_EN(ON)
V_EN(OFF)
V_EN(HYS)
t_d(OFF)
t_d(ON)
Enable ON Threshold
Enable OFF Threshold
Enable Hysteresis
Turn-off delay
Turn-on delay
I_EN
ERROR Flag
Enable Pin Current
V_EN rising from 0.50V until
V_OUT = ON
0.90
0.80
1.20
1.50
1.60
V
V_EN falling from 1.60V until
V_OUT = OFF
0.60
0.50
1.00
1.40
1.50
V
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 = 800 mA
-
25
-
V_EN = V_IN
V_EN = 0V
-
1
-
nA
-
-1
-
V_TH
Error Flag Threshold⁽⁵⁾
V_OUT rising threshold where ERROR
Flag goes high
78
90
98
%
V_OUT falling threshold where
ERROR Flag goes low
74
85
93
V_ERROR(SAT)
I_lk
ERROR Flag Saturation Voltage I_SINK = 1 mA
ERROR Flag Pin Leakage
Current
V_ERROR = 5.5V
-
12.5
45
mV
-
1
-
nA
(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 LP38511-1.8, the minimum V_IN operating voltage is the limiting factor.
(5) The ERROR Flag thresholds are specified as percentage of the nominal regulated output voltage. See APPLICATION INFORMATION.
Copyright © 2007–2009, Texas Instruments Incorporated
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