Datasheet

LP38690-ADJ, LP38692-ADJ
SNVS323H –DECEMBER 2004–REVISED APRIL 2013 www.ti.com
ELECTRICAL CHARACTERISTICS
Limits in standard typeface are for T
J
= 25°C, and limits in boldface type apply over the full operating temperature range.
Unless otherwise specified: V
IN
= V
OUT
+ 1V, C
IN
= C
OUT
= 10 µF, I
LOAD
= 10mA. Min/Max limits are specified through testing,
statistical correlation, or design.
Symbol Parameter Conditions Min Typ
(1)
Max Units
V
IN
= 2.7V 1.219 1.25 1.281
V
ADJ
ADJ Pin Voltage V
3.2V ≤ V
IN
≤ 10V
1.187 1.25 1.313
100 µA < I
L
< 1A
ΔV
O
/ΔV
IN
Output Voltage Line Regulation
(2)
V
O
+ 0.5V ≤ V
IN
≤ 10V
0.03 0.1 %/V
I
L
= 25mA
ΔV
O
/ΔI
L
Output Voltage Load Regulation
(3)
1 mA < I
L
< 1A
1.8 5 %/A
V
IN
= V
O
+ 1V
(V
O
= 1.8V)
950 1600
I
L
= 1A
(V
O
= 2.5V)
80 145
I
L
= 0.1A
800 1300
I
L
= 1A
V
IN
- V
O
Dropout Voltage
(4)
mV
(V
O
= 3.3V)
65 110
I
L
= 0.1A
650 1000
I
L
= 1A
(V
O
= 5V)
45 100
I
L
= 0.1A
450 800
I
L
= 1A
I
Q
Quiescent Current V
IN
≤ 10V, I
L
= 100 µA - 1A 55 100
V
EN
≤ 0.4V, (LP38692-ADJ Only) 0.001 1 µA
I
L
(MIN) Minimum Load Current V
IN
- V
O
≤ 4V 100
I
FB
Foldback Current Limit V
IN
- V
O
> 5V 450
mA
V
IN
- V
O
< 4V 1500
PSRR Ripple Rejection V
IN
= V
O
+ 2V(DC), with 1V(p-p) / 120Hz
55 dB
Ripple
T
SD
Thermal Shutdown Activation
160
(Junction Temp)
°C
T
SD
(HYST) Thermal Shutdown Hysteresis
10
(Junction Temp)
I
ADJ
ADJ Input Leakage Current V
ADJ
= 0 - 1.5V
-100 0.01 100 nA
V
IN
= 10V
e
n
Output Noise BW = 10Hz to 10kHz
0.7 µV/√Hz
V
O
= 3.3V
V
O
(LEAK) Output Leakage Current V
O
= V
O
(NOM) + 1V @ 10V
IN
0.5 2 µA
V
EN
Enable Voltage (LP38692-ADJ Output = OFF 0.4
Only)
Output = ON, V
IN
= 4V 1.8
V
Output = ON, V
IN
= 6V 3.0
Output = ON, V
IN
= 10V 4.0
I
EN
Enable Pin Leakage (LP38692- V
EN
= 0V or 10V, V
IN
= 10V -1 0.001 1
µA
ADJ Only)
(1) Typical numbers represent the most likely parametric norm for 25°C operation.
(2) Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.
(3) Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from 1mA to
full load.
(4) Dropout voltage is defined as the minimum input to output differential required to maintain the output within 100mV of nominal value.
4 Submit Documentation Feedback Copyright © 2004–2013, Texas Instruments Incorporated
Product Folder Links: LP38690-ADJ LP38692-ADJ