LP38856_15 Datasheet, PDF (4/24 Pages) Texas Instruments – 3A Fast-Response High-Accuracy LDO Linear Regulator With Enable

LP38856
SNVS336F – JUNE 2006 – REVISED AUGUST 2015
www.ti.com
6.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)⁽¹⁾
V_IN
V_BIAS
V_EN
I_OUT
Supply voltage
Supply voltage
Enable input voltage
Output current
Junction temperature range⁽²⁾
MIN
(V_OUT + V_DO)
3
0.0
0
–40
NOM
MAX
V_BIAS
5.5
V_BIAS
3
125
UNIT
V
mA/A
°C
(1) Absolute maximum ratings indicate limits beyond which damage to the component may occur. Operating ratings indicate conditions for
which the device is intended to be functional, but do not ensure specific performance limits (see Electrical Characteristics).
Specifications do not apply when operating the device outside of its rated operating conditions.
(2) Device power dissipation must be de-rated based on device power dissipation (T_D), ambient temperature (T_A), and package junction to
ambient thermal resistance (R_θJA). Additional heat-sinking may be required to ensure that the device junction temperature (T_J) does not
exceed the maximum operating rating. See Application and Implementation for details.
6.4 Thermal Information
THERMAL METRIC⁽¹⁾
LP38856
KTT (DDPAK/TO-263)
NDH (TO-220)
UNIT
5 PINS
R_θJA
R_θJC(top)
R_θJB
ψ_JT
ψ_JB
R_θJC(bot)
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
41.8
32.0
°C/W
45.0
43.8
°C/W
24.8
18.6
°C/W
13.1
8.8
°C/W
23.8
18.0
°C/W
2.4
1.2
°C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
6.5 Electrical Characteristics
Unless otherwise specified: V_IN = V_OUT(NOM) + 1 V, V_BIAS = 3 V, I_OUT = 10 mA, C_IN = C_OUT = 10 µF, C_BIAS = 1 µF, V_EN = V_BIAS.
Limits apply for T_J = 25°C only unless otherwise specified. 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.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OUT
Output Voltage Tolerance
ΔV_OUT/ΔV_IN
ΔV_OUT/ΔV_BIAS
ΔV_OUT/ΔI_OUT
V_DO
Line regulation, V_IN(1)
Line regulation, V_BIAS(1)
Output voltage load regulation⁽²⁾
Dropout voltage, V_IN − V_OUT(3)
V_OUT(NOM) + 1 V ≤ V_IN ≤ V_BIAS
3 V ≤ V_BIAS ≤ 5.5 V, 10 mA ≤ I_OUT ≤ 3 A
V_OUT(NOM) + 1 V ≤ V_IN ≤ V_BIAS
3 V ≤ V_BIAS ≤ 5.5 V, 10 mA ≤ I_OUT ≤ 3 A
T_J = –40°C to 125°C
V_OUT(NOM) + 1V ≤ V_IN ≤ V_BIAS
3 V ≤ V_BIAS ≤ 5.5 V, 10 mA ≤ I_OUT ≤ 3.0A
0°C ≤ T_J ≤ 125°C
V_OUT(NOM) + 1 V ≤ V_IN ≤ V_BIAS
3 V ≤ V_BIAS ≤ 5.5 V
10 mA ≤ I_OUT ≤ 3 A
I_OUT = 3 A
I_OUT = 3 A, T_J = –40°C to 125°C
–1%
–3%
–2%
0%
+1%
3%
0%
2%
0.04
%/V
0.10
%/V
0.2
%/A
240
300
mV
450
(1) Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.
(2) Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from no load
to full load.
(3) Dropout voltage is defined the as input to output voltage differential (V_IN - V_OUT) where the input voltage is low enough to cause the
output voltage to drop no more than 2% from the nominal value
4
Submit Documentation Feedback
Copyright © 2006–2015, Texas Instruments Incorporated
Product Folder Links: LP38856