LP38501TS-ADJ Datasheet, PDF (4/22 Pages) Texas Instruments – LP38501/3-ADJ, LP38501A/3A-ADJ 3A FlexCap Low Dropout Linear Regulator for 2.7V to 5.5V Inputs

LP38501-ADJ, LP38503-ADJ
SNVS522H – AUGUST 2007 – REVISED APRIL 2013
www.ti.com
ELECTRICAL CHARACTERISTICS, LP38501/3–ADJ
Unless otherwise specified: V_IN = 3.3V, I_OUT = 10 mA, C_IN = 10 µF, C_OUT = 10 µF, V_EN = V_IN, V_OUT = 1.8V. 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_ADJ
V_ADJ
I_ADJ
V_DO
Adjust Pin Voltage⁽¹⁾
Adjust Pin Voltage⁽¹⁾
"A" GRADE
Adjust Pin Bias Current
Dropout Voltage⁽²⁾
2.7V ≤ V_IN ≤ 5.5V
10 mA ≤ I_OUT ≤ 3A
2.7V ≤ V_IN ≤ 5.5V
10 mA ≤ I_OUT ≤ 3A
2.7V ≤ V_IN ≤ 5.5V
I_OUT = 3A
0.584
0.575
0.605
0.626
0.635
V
0.596
0.587
0.605
0.614
0.623
V
50
750
nA
420
550
665
mV
ΔV_OUT/ΔV_IN
Output Voltage Line Regulation^{(3) (1)} 2.7V ≤ V_IN ≤ 5.5V
—
0.04
0.05
—
%/V
ΔV_OUT/ΔI_OUT Output Voltage Load Regulation⁽⁴⁾⁽¹⁾ 10 mA ≤ I_OUT ≤ 3A
—
0.12
0.24
—
%/A
I_GND
Ground Pin Current In Normal
Operation Mode
10 mA ≤ I_OUT ≤ 3A
—
2
4
5
mA
I_DISABLED
Ground Pin Current
V_EN < V_IL(EN)
—
0.025
0.125
15
µA
I_OUT(PK)
Peak Output Current
V_OUT ≥ V_OUT(NOM) - 5%
6
A
I_SC
Short Circuit Current
V_OUT = 0V
3.5
6
A
Enable Input (LP38501 Only)
V_IH(EN)
V_IL(EN)
t_d(off)
Enable Logic High
Enable Logic Low
Turn-off delay
t_d(on)
I_IH(EN)
I_IL(EN)
AC Parameters
Turn-on delay
Enable Pin High Current
Enable Pin Low Current
V_OUT = ON
1.4
V_OUT = OFF
—
Time from V_EN < V_IL(EN) to V_OUT = OFF
I_LOAD = 3A
—
Time from V_EN >V_IH(EN) to V_OUT = ON
I_LOAD = 3A
—
V_EN = V_IN
—
V_EN = 0V
—
—
—
V
—
0.65
25
—
µs
25
—
35
—
nA
35
—
PSRR
Ripple Rejection
V_IN = 3.0V, I_OUT = 3A
f = 120Hz
V_IN = 3.0V, I_OUT = 3A
f = 1 kHz
—
58
—
dB
—
56
—
ρ_n(l/f)
Output Noise Density
e_n
Output Noise Voltage
Thermal Characteristics
f = 120Hz, C_OUT = 10 µF CER
BW = 100Hz – 100kHz
C_OUT = 10 µF CER
—
1.0
—
µV/√Hz
—
100
—
µV (rms)
T_SD
ΔT_SD
θ_J-A
θ_J-C
Thermal Shutdown
Thermal Shutdown Hysteresis
Thermal Resistance
Junction to Ambient
Thermal Resistance
Junction to Case
T_J rising
T_J falling from T_SD
TO-263, PFM THIN⁽⁵⁾
1 sq. in. copper
TO-263, TO-263 THIN
—
170
—
°C
—
10
—
37
°C/W
—
5
—
(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) Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. For
any output voltage less than 2.5V, the minimum V_IN operating voltage is the limiting factor.
(3) 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.
(4) 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.
(5) The value of θ_JA for the TO-263 (TS) package and TO-263 THIN (TJ) package can range from approximately 30 to 60°C/W depending
on the amount of PCB copper dedicated to heat transfer (See Application Information).
4
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