LM1084 Datasheet, PDF (1/1 Pages) National Semiconductor (TI) – 5A Low Dropout Positive Regulators

TIGER ELECTRONIC CO.,LTD
5A LOW DROPOUT POSITIVE REGULATOR
Product specification
LM1084-XX
Features
1. Dropout Voltage 1.3V at 5A Output Current.
2. Fast Transient Response.
3. Extremely Tight Line and Load Regulation.
4. Current Limiting and Thermal Protection.
5. Adjustable Output Voltage or Fixed 1.5V, 1.8V,
2.5V, 3.3V, 5.0V.
6. Standard 3-Pin Power Packages.
TO-220
TO-263
DESCRIPTION
The LM1084 is a low dropout three terminal
regulator with 5A output current capability. The
output voltage is adjustable with the use of a
resistor divider or fixed 1.5V, 1.8V, 2.5V, 3.3V and 5.0V.
Dropout voltage is guaranteed to be at maximum
of 1.4V with the maximum output current. Its low
dropout voltage and fast transient response make
it ideal for low voltage microprocessor applications.
Current limit and thermal protection provide
protection against any overload condition that
would create excessive junction temperatures.
TO-252
TO-263-2L
1. Adj(COM) 2. Output 3. Input
Electrical Characteristics ( Ta = 25 ^OC)
(VIN=5V, TJ=25°C, IO=10mA, unless otherwise specified) (Note1)
PARAMETER
Reference Voltage
Output Voltage
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
GND Current (Fix)
Adjusted Pin Current
Adjusted Pin Current Change (ΔIADJ)
Temperature Stability
Minimum Load Current
RMS Output Noise (% of V_OUT)
Ripple Rejection Ratio
TEST CONDITIONS
LM1084 (ADJ)
LM1084-15, V_IN=4.5V
LM1084-18, V_IN=4.8V
LM1084-25, V_IN=5.5V
LM1084-33, V_IN=6.3V
LM1084-50, V_IN=7.0V
ADJ : 2.65V≤ V_IN ≤7V
V_OUT=1.25V
Fix : V_OUT+1.4V≤ V_IN ≤7V
10mA < I_O < 5A
ΔVOUT, ΔVREF=1%
10mA ≤ I_O ≤ 5A
2.65V ≤ V_IN ≤ 7V
2.65V ≤ V_IN ≤ 7V
2.65V ≤ V_IN ≤ 7V
I_O=0.5A
120Hz input ripple
C_OUT=25μF
(V_IN -V_OUT)=3V
MIN
1.225
1.470
1.764
2.450
3.235
4.90
-
5.0
2.0
60
TYP
1.25
1.50
1.80
2.50
3.30
5.00
0.015
1.3
6.0
55
0.2
0.5
5.0
0.003
72
MAX
1.275
1.530
1.836
2.55
3.365
5.10
UNIT
V
0.2
%
0.6
%
1.4
V
A
10
mA
120
uA
5.0
uA
%
10
mA
%
dB
Note:
Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).