Datasheet

LP3962, LP3965
www.ti.com SNVS066H –MAY 2000–REVISED APRIL 2013
Operating Ratings
Input Supply Voltage (Operating),
(1)
2.5V to 7.0V
Shutdown Input Voltage (Operating) −0.3V to V
IN
+0.3V
Maximum Operating Current (DC) 1.5A
Operating Junction Temp. Range −40°C to +125°C
(1) The minimum operating value for V
IN
is equal to either [V
OUT(NOM)
+ V
DROPOUT
] or 2.5V, whichever is greater.
Electrical Characteristics
LP3962/LP3965
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
O(NOM)
+ 1V, I
L
= 10 mA, C
OUT
= 33µF, V
SD
= V
IN
-0.3V.
Symbol Parameter Conditions Typ
(1)
LP3962/5
(2)
Units
Min Max
V
O
Output Voltage Tolerance
(3)
10 mA ≤ I
L
≤ 1.5A -1.5 +1.5
0 %
V
OUT
+1 ≤ V
IN
≤ 7.0V -3.0 +3.0
V
ADJ
Adjust Pin Voltage (ADJ version) 10 mA ≤ I
L
≤ 1.5A 1.198 1.234
1.216 V
V
OUT
+1.5V ≤ V
IN
≤ 7.0V 1.180 1.253
ΔV
OL
Output Voltage Line Regulation V
OUT
+1V<V
IN
<7.0V, 0.02 %
(3)
0.06
ΔV
O
/ ΔI
OUT
Output Voltage Load 10 mA < I
L
< 1.5 A 0.04 %
Regulation
(3)
0.09
V
IN
- V
OUT
I
L
= 150 mA 38 45
55
Dropout Voltage
(4)
mV
I
L
= 1.5 A 380 450
550
I
L
= 150 mA 4 9
10
Ground Pin Current In Normal
I
GND
mA
Operation Mode
I
L
= 1.5 A 5 14
15
I
GND
Ground Pin Current In Shutdown V
SD
≤ 0.2V 15 25 µA
Mode
(5)
75
I
O(PK)
Peak Output Current See
(6)
2.5 2.0 A
1.7
SHORT CIRCUIT PROTECTION
I
SC
Short Circuit Current 4.5 A
OVER TEMPERATURE PROTECTION
Tsh(t) Shutdown Threshold 165 °C
Tsh(h) Thermal Shutdown Hysteresis 10 °C
SHUTDOWN INPUT
Output = High V
IN
V
IN
–0.3
V
SDT
Shutdown Threshold V
Output = Low 0 0.2
T
dOFF
Turn-off delay I
L
= 1.5 A 20 µs
(1) Typical numbers are at 25°C and represent the most likely parametric norm.
(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation using
Statistical Quality Control (SQC) methods. The limits are used to calculate TI's Average Outgoing Quality Level (AOQL).
(3) Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage.
Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. 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.
(4) Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value.
Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the drop-out voltage is
nothing but the input to output differential, since the minimum input voltage is 2.5V.
(5) This specification has been tested for −40°C ≤ T
J
≤ 85°C since the temperature rise of the device is negligible under shutdown
conditions.
(6) At elevated temperatures, devices must be derated based on package thermal resistance. The devices in TO-220 package must be
derated at θ
jA
= 50°C/W (with 0.5in
2
, 1oz. copper area), junction-to-ambient (with no heat sink). The devices in the SFM/TO-263
surface-mount package must be derated at θ
jA
= 60°C/W (with 0.5in
2
, 1oz. copper area), junction-to-ambient. The devices in SOT-223
package must be derated at θ
jA
= 90°C/W (with 0.5in
2
, 1oz. copper area), junction-to-ambient.
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