LT1121-3.3 Linear Technology, LT1121-3.3 Datasheet - Page 2

• Manufacturer Part Number: LT1121-3.3
• Description: Micropower Low Dropout Regulators with Shutdown
• Manufacturer: Linear Technology

A
ELECTRICAL C
PARAMETER
Regulated Output Voltage
(Note 3)
Line Regulation
LT1121/LT1121-3.3/LT1121-5
Input Voltage ...................................................... 30V*
Output Pin Reverse Current ................................. 10mA
Adjust Pin Current ............................................... 10mA
Shutdown Pin Input Voltage (Note 1) ........ 6.5V, – 0.6V
Shutdown Pin Input Current (Note 1) .................. 20mA
Output Short-Circuit Duration ......................... Indefinite
PACKAGE/ORDER I FOR ATIO
2
Consult factory for Military grade parts.
BSOLUTE
NC/ADJ*
LT1121CN8
LT1121CN8-3.3
LT1121CN8-5
LT1121IN8
LT1121IN8-3.3
LT1121IN8-5
LT1121CS8
LT1121CS8-3.3
LT1121CS8-5
GND
OUT
NC
ORDER PART NUMBER
8-LEAD PLASTIC SOIC
1
2
3
4
JA
8-LEAD PLASTIC DIP
JA
N8 PACKAGE
S8 PACKAGE
120 C/ W (N8, S8)
TOP VIEW
70 C/ W (AS8)
W
A
HARA TERISTICS
8
7
6
5
LT1121IS8
LT1121IS8-3.3
LT1121IS8-5
LT1121ACS8
LT1121ACS8-3.3
LT1121ACS8-5
LT1121AIS8
LT1121AIS8-3.3
LT1121AIS8-5
XI
IN
NC**
NC**
SHDN
W
CONDITIONS
LT1121-3.3
LT1121-5
LT1121 (Note 4)
LT1121-3.3
LT1121-5
LT1121 (Note 4)
**
U
*
PIN 2 = NC FOR LT1121-3.3/LT1121-5
PINS 6 AND 7 ARE FLOATING (NO
INTERNAL CONNECTION) ON THE
STANDARD S8 PACKAGE.
PINS 6 AND 7 CONNECTED TO GROUND
ON THE A VERSION OF THE LT1121 (S8 ONLY).
CONNECTING PINS 6 AND 7 TO THE
GROUND PLANE WILL REDUCE THERMAL
RESISTANCE. SEE THERMAL RESISTANCE
TABLES IN THE APPLICATIONS INFORMATION
SECTION.
C
U
W
= ADJ FOR LT1121
R
A
W
TI
V
4.3V < V
V
6V < V
V
4.8V < V
U
1121
11213
11215
1121I
121I3
121I5
IN
IN
IN
V
V
V
IN
IN
IN
G
= 3.8V, I
= 5.5V, I
= 4.3V, I
MARKING
S8 PART
= 4.8V to 20V, I
= 5.5V to 20V, I
= 4.3V to 20V, I
IN
S
IN
IN
< 20V, 1mA < I
U
< 20V, 1mA < I
< 20V, 1mA < I
1121A
121A3
121A5
121AI
121AI3
121AI5
OUT
OUT
OUT
= 1mA, T
= 1mA, T
= 1mA, T
Storage Temperature Range ................. – 65 C to 150 C
Operating Junction Temperature Range (Note 2)
Lead Temperature (Soldering, 10 sec).................. 300 C
*For applications requiring input voltage ratings greater than 30V, contact the factory.
OUT
OUT
OUT
OUT
J
J
J
= 1mA
= 1mA
= 1mA
LT1121C-X ......................................... 0 C to 125 C
LT1121I-X ..................................... – 40 C to 125 C
OUT
OUT
= 25 C
= 25 C
= 25 C
TAB IS
< 150mA
GND
< 150mA
< 150mA
3-LEAD PLASTIC SOT-223
LT1121CST-3.3
LT1121IST-3.3
LT1121CST-5
LT1121IST-5
ORDER PART
FRONT VIEW
NUMBER
ST PACKAGE
JA
50 C/ W
3
2
1
LT1121 • PO03
OUTPUT
GND
V
IN
3.250
3.200
4.925
4.850
3.695
3.640
MIN
3.300
3.300
5.000
5.000
3.750
3.750
TYP
1.5
1.5
1.5
3-LEAD PLASTIC TO-92
ORDER PART
LT1121CZ-3.3
LT1121IZ-3.3
LT1121CZ-5
LT1121IZ-5
IN
3
BOTTOM VIEW
NUMBER
Z PACKAGE
JA
GND
3.350
3.400
5.075
5.150
3.805
3.860
MAX
2
150 C/ W
10
10
10
LT1121 • PO02
OUT
1
UNITS
mV
mV
mV
V
V
V
V
V
V