LP3963 Datasheet, PDF (5/25 Pages) National Semiconductor (TI) – 3A Fast Ultra Low Dropout Linear Regulators

LP3963, LP3966
www.ti.com
SNVS067H – APRIL 2000 – REVISED APRIL 2013
Electrical Characteristics
LP3963/LP3966
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) + 1.5V, I_L = 10 mA, C_OUT =33µF, V_SD = V_IN-0.3V.
Symbol
Parameter
Conditions
Typ ⁽¹⁾
LP3963/6 ⁽²⁾
Units
V_O
V_ADJ
ΔV _OL
Output Voltage Tolerance⁽³⁾
Adjust Pin Voltage (ADJ version)
Output Voltage Line Regulation
(3)
V_OUT +1.5V < V_IN< 7.0V
10 mA < I_L < 3A
10 mA ≤ I_L ≤ 3A
V_OUT +1.5V ≤ V_IN≤ 7.0V
V_OUT +1.5V < V_IN < 7.0V
Min
Max
0
-1.5
+1.5
-3.0
+3.0
%
1.216
1.198
1.180
1.234
1.253
V
0.02
%
0.06
ΔV_O/ ΔI_OUT Output Voltage Load Regulation 10 mA < I_L < 3A
0.06
%
(3)
0.01
V_IN - V_OUT
Dropout Voltage ⁽⁴⁾
I_L = 300 mA
I_L = 3A
80
100
120
mV
800
1000
1200
I_GND
Ground Pin Current In Normal
Operation Mode
I_L = 300 mA
I_L = 3A
5
9
10
mA
6
14
15
I_GND
I_O(PK)
Ground Pin Current In Shutdown
Mode ⁽⁵⁾
Peak Output Current
V_SD ≤ 0.2V
See ⁽⁶⁾
15
25
µA
75
4.5
4
A
3.5
SHORT CIRCUIT PROTECTION
I_SC
Short Circuit Current
OVER TEMPERATURE PROTECTION
5.5
A
Tsh(t)
Shutdown Threshold
165
°C
Tsh(h)
Thermal Shutdown Hysteresis
10
°C
SHUTDOWN INPUT
V_SDT
Shutdown Threshold
Output = High
Output = Low
V_IN
V_IN–0.3
V
0
0.2
T_dOFF
T_dON
I_SD
ERROR FLAG
Turn-off delay
Turn-on delay
SD Input Current
V_T
V_TH
V_EF(Sat)
Td
Threshold
Threshold Hysteresis
Error Flag Saturation
Flag Reset Delay
I_L = 3A
I_L = 3A
V_SD = V_IN
See ⁽⁷⁾
See ⁽⁷⁾
I_sink = 100µA
20
µs
25
µs
1
nA
10
5
16
%
5
2
8
%
0.02
0.1
V
1
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 0.5in², 1oz. copper area), junction-to-ambient (with no heat sink). The devices in the DDPAK/TO-263
surface-mount package must be derated at θ_jA = 60°C/W (with 0.5in², 1oz. copper area), junction-to-ambient. See Application Hints.
(7) Error Flag threshold and hysteresis are specified as percentage of regulated output voltage. See Application Hints.
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