Datasheet

LP38513-ADJ
SNVS514C –JANUARY 2009–REVISED APRIL 2013 www.ti.com
ELECTRICAL CHARACTERISTICS
Unless otherwise specified: V
IN
= 2.50V, V
OUT
= V
ADJ
, 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
2.25V ≤ V
IN
≤ 5.5V 495.0 505.0
V
ADJ
V
ADJ
Accuracy
(1)
500. mV
10 mA ≤ I
OUT
≤ 3A 490.0 510.0
I
ADJ
ADJ Pin Bias Current 2.25V ≤ V
IN
≤ 5.5V - 1 - nA
0.03
ΔV
ADJ
/ΔV
IN
V
ADJ
Line Regulation
(2) (1)
2.25V ≤ V
IN
≤ 5.5V - - %/V
0.06
0.15
ΔV
ADJ
/ΔI
OUT
V
ADJ
Load Regulation
(3) (1)
10 mA ≤ I
OUT
≤ 3A - - %/A
0.20
V
DO
Dropout Voltage
(4)
I
OUT
= 3A - - 470 mV
10
I
OUT
= 10 mA - 8
12
Ground Pin Current, Output
mA
Enabled
14
I
GND
I
OUT
= 3A - 12
16
Ground Pin Current, Output 5
V
EN
= 0.50V - 1 µA
Disabled 10
I
SC
Short Circuit Current V
OUT
= 0V - 5.2 - A
Enable Input
V
EN
rising from <0.5V until 0.90 1.50
V
EN(ON)
Enable ON Voltage Threshold 1.20
V
OUT
= ON 0.80 1.60
V
V
EN
falling from 1.6V until 0.70 1.30
V
EN(OFF)
Enable OFF Voltage Threshold 1.00
V
OUT
= OFF 0.60 1.40
V
EN(HYS)
Enable Voltage Hysteresis V
EN(ON)
- V
EN(OFF)
- 200 - mV
V
EN
= V
IN
- 1 -
I
EN
Enable Pin Current nA
V
EN
= 0V - -1 -
Time from V
EN
< V
EN(TH)
to
t
d(OFF)
Turn-off delay - 5 -
V
OUT
= OFF, I
LOAD
= 3A
µs
Time from V
EN
>V
EN(TH)
to
t
d(ON)
Turn-on delay - 5 -
V
OUT
= ON, I
LOAD
= 3A
AC Parameters
V
IN
= 2.5V
- 73 -
f = 120Hz
PSRR Ripple Rejection dB
V
IN
= 2.5V
- 70 -
f = 1 kHz
ρ
n(l/f)
Output Noise Density f = 120Hz - 0.4 - µV/√Hz
e
n
Output Noise Voltage BW = 10Hz - 100kHz - 25 - µV
RMS
Thermal Characteristics
T
SD
Thermal Shutdown T
J
rising - 165 -
°C
ΔT
SD
Thermal Shutdown Hysteresis T
J
falling from T
SD
- 10 -
Thermal Resistance
θ
J-A
TO-263 THIN - 67 - °C/W
Junction to Ambient
(5)
Thermal Resistance
θ
J-C
TO-263 THIN - 2 - °C/W
Junction to Case
(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) Line regulation is defined as the change in V
ADJ
from the nominal value due to change in the voltage at the input.
(3) Load regulation is defined as the change in V
ADJ
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%. For the LP38513-ADJ, the minimum operating voltage of 2.25V is the limiting factor when the
programed output voltage is less than typically 1.80V.
(5) 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
). The typical θ
JA
rating given is worst case
based on minimum land area on two-layer PCB (EIA/JESD51-3). See POWER DISSIPATION/HEAT-SINKING for details.
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