A1084
AiT Semiconductor Inc.
www.ait-ic.com
5A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
THERMAL SHUTDOWN AND CURRENT LIMIT FUNCTIONS
Symbol
Parameter
Conditions
IN − VOUT = 3V, TJ = 25oC
Min. Typ. Max. Unit
Current Limit
V
7.0
3
A
mA
mA
uA
ILIMIT
Minimum Load
A1084-ADJ
10
10
Current (Note 4)
Iq
Quiescent Current VIN = 10V
5
Adjustable Version
IADJ
Adjust Pin Current
45
110
VIN = 4.25V, IOUT = 10mA
F = 120Hz, COUT = 25uF (Tan)
IOUT = 5A, VIN − VOUT = 3V
Ripple Rejection
60
dB
Adjust Pin Current 10mA ≤ IOUT ≤ 5A,
ICHANGE
0.2
5
uA
Change
1.5V ≤ VIN − VOUT ≤ 6V
IOUT = 10mA,
Temperature Stability
0.5
%
VIN − VOUT = 1.5V
TO-252
Thermal Resistance
Junction to Case
12.5
3
ΘJC
oC/W
TO-263-2 and TO-263-3
Note 1: The Parameters of Line Regulation and Load Regulation are tested under constant junction temperature.
Note 2: When IOUT varies between 0 to 5A, VIN – VOUT varies between 1.5V to 6.0V under constant junction temperature, the
parameter is satisfied the criterion as above mentioned. If temperature varies between 0oC ≤ TA ≤ 80oC, it needs output
current to be larger than 10mA to satisfy the criterion.
Note 3: Dropout Voltage is tested under IOUT = 5A and the following testing conditions:
First step is to find out the VOUT value (VOUT1) when VIN1 = VOUT + 1.5V,
Second step is to decrease VIN (VIN2) until VOUT value is equal to 99% x VOUT1 (VOUT2). VDROPOUT = VIN2 – VOUT2
.
Note 4: Minimum Load Current is defined as the minimum output current required to maintain regulation.
When 1.5V ≦ VIN – VOUT ≦ 6V, the device is guaranteed to regulate if the output current is greater than 10mA.
REV1.2
- JUN 2007 RELEASED – SEP 2008 REVISED -
- 4 -
AITSEMI [ AiT Semiconductor ]
