LT1121ACS8-3.3#PBF Linear Technology, LT1121ACS8-3.3#PBF Datasheet

IC REG LDO 3.3V 150MA 8-SOIC

LT1121ACS8-3.3#PBF

Manufacturer Part Number
LT1121ACS8-3.3#PBF
Description
IC REG LDO 3.3V 150MA 8-SOIC
Manufacturer
Linear Technology
Datasheets

Specifications of LT1121ACS8-3.3#PBF

Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
4.17 ~ 30 V
Voltage - Dropout (typical)
0.42V @ 150mA
Number Of Regulators
1
Current - Output
150mA
Operating Temperature
0°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Primary Input Voltage
20V
Output Voltage Fixed
3.3V
Dropout Voltage Vdo
400mV
No. Of Pins
8
Output Current
150mA
Voltage Regulator Case Style
SOIC
Operating Temperature Range
0°C To +125°C
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT1121ACS8-3.3#PBFLT1121ACS8-3.3
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LT1121ACS8-3.3#PBFLT1121ACS8-3.3
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
0.4V Dropout Voltage
150mA Output Current
30µA Quiescent Current
No Protection Diodes Needed
Adjustable Output from 3.8V to 30V
3.3V and 5V Fixed Output Voltages
Controlled Quiescent Current in Dropout
Shutdown
16µA Quiescent Current in Shutdown
Stable with 0.33µF Output Capacitor
Reverse Battery Protection
No Reverse Current with Input Low
Thermal Limiting
Available in the 8-Lead SO, 8-Lead PDIP, 3-Lead
SOT-23 and 3-Lead TO-92 Packages
Low Current Regulator
Regulator for Battery-Powered Systems
Post Regulator for Switching Supplies
5V Battery-Powered Supply with Shutdown
5V
V
8
5
SHDN
IN
SHDN
<0.25
>2.8
NC
U
LT1121-3.3
(PIN 5)
GND
3
OUTPUT
OUT
OFF
ON
ON
1
LT1121 • TA01
U
+
1µF
SOLID TANTALUM
3.3V
150mA
OUT
DESCRIPTIO
The LT
dropout regulators with shutdown. These devices are
capable of supplying 150mA of output current with a
dropout voltage of 0.4V. Designed for use in battery-
powered systems, the low quiescent current, 30µA oper-
ating and 16µA in shutdown, makes them an ideal choice.
The quiescent current is well-controlled; it does not rise in
dropout as it does with many other low dropout PNP
regulators.
Other features of the LT1121/LT1121-3.3/LT1121-5 in-
clude the ability to operate with very small output capaci-
tors. They are stable with only 0.33µF on the output while
most older devices require between 1µF and 100µF for
stability. Small ceramic capacitors can be used, enhancing
manufacturability. Also the input may be connected to
ground or a reverse voltage without reverse current flow
from output to input. This makes the LT1121 series ideal
for backup power situations where the output is held high
and the input is at ground or reversed. Under these
conditions only 16µA will flow from the output pin to
ground.
All other trademarks are the property of their respective owners.
Regulators with Shutdown
Micropower Low Dropout
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
LT1121/LT1121-3.3/LT1121-5
1121/LT1121-3.3/LT1121-5 are micropower low
0.5
0.4
0.3
0.2
0.1
0
0
20
U
40
OUTPUT CURRENT (mA)
Dropout Voltage
60
80
100
120 140
LT1121 • TA02
160
1121fc
1

Related parts for LT1121ACS8-3.3#PBF

LT1121ACS8-3.3#PBF Summary of contents

Page 1

... Under these conditions only 16µA will flow from the output pin to ground. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 0.5 3.3V ...

Page 2

... T JMAX JA ORDER PART NUMBER LT1121CN8 LT1121IS8-3.3 LT1121CN8-3.3 LT1121IS8-5 LT1121CN8-5 LT1121HVIS8 LT1121IN8 LT1121ACS8 LT1121IN8-3.3 LT1121ACS8-3.3 LT1121IN8-5 LT1121ACS8-5 LT1121CS8 LT1121AHVCS8 LT1121CS8-3.3 LT1121AIS8 LT1121CS8-5 LT1121AIS8-3.3 LT1121HVCS8 LT1121AIS8-5 LT1121IS8 LT1121AHVIS8 Consult LTC Marketing for parts specified with wider opearating temperature ranges (Note 1) Output Short-Circuit Duration ......................... Indefinite Operating Junction Temperature Range (Note 3) LT1121C-X ........................................... 0° ...

Page 3

ELECTRICAL CHARACTERISTICS range, otherwise specifications are at T PARAMETER CONDITIONS Regulated Output Voltage LT1121-3.3 (Note 4) LT1121-5 LT1121 (Note 5) Line Regulation LT1121-3.3 LT1121-5 LT1121 (Note 5) Load Regulation LT1121-3.3 LT1121-5 LT1121 (Note 5) Dropout Voltage I LOAD (Note 6) ...

Page 4

LT1121/LT1121-3.3/LT1121-5 ELECTRICAL CHARACTERISTICS impedance sources or logic running on supply voltages greater than 5.5V, the maximum current driven into the shutdown pin must be limited to less than 20mA. Note 3: For junction temperatures greater than 110°C, a minimum load ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS LT1121-3.3 Output Voltage 3. 1mA OUT 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 –50 – 100 125 TEMPERATURE (°C) 1121 G22 LT1121-3.3 Ground Pin Current 800 ...

Page 6

LT1121/LT1121-3.3/LT1121 TYPICAL PERFOR A CE CHARACTERISTICS Ground Pin Current 14 = 3.3V (LT1121-3. (LT1121- 3.75V (LT1121 DEVICE IS OPERATING 10 IN DROPOUT = 125° ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS Reverse Output Current 100 T = 25° CURRENT FLOWS 80 INTO OUTPUT PIN 70 LT1121 OUT ADJ 50 40 LT1121-3 ...

Page 8

LT1121/LT1121-3.3/LT1121 CTIO S Input Pin: Power is supplied to the device through the input pin. The input pin should be bypassed to ground if the device is more than six inches away from the main ...

Page 9

U U APPLICATIO S I FOR ATIO The LT1121 is a micropower low dropout regulator with shutdown, capable of supplying up to 150mA of output current at a dropout voltage of 0.4V. The device operates with very low quiescent current ...

Page 10

LT1121/LT1121-3.3/LT1121 APPLICATIO S I FOR ATIO taken in still air, on 3/32" FR-4 board with 1oz copper. All NC leads were connected to the ground plane. Table 1. N8 Package* COPPER AREA TOPSIDE BACKSIDE BOARD AREA 2500 sq ...

Page 11

U U APPLICATIO S I FOR ATIO that the ESR of the capacitor is low (ceramic) the sug- gested series resistor is shown in Table 5. The LT1121 is a micropower device and output transient response will be a function ...

Page 12

LT1121/LT1121-3.3/LT1121 APPLICATIO S I FOR ATIO When the input of the LT1121 is forced to a voltage below its nominal output voltage and its output is held high, the reverse output current will still follow the curve in ...

Page 13

PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( +0.889 8.255 –0.381 NOTE: 1. DIMENSIONS ARE *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT ...

Page 14

LT1121/LT1121-3.3/LT1121-5 PACKAGE DESCRIPTIO .264 – .287 (6.70 – 7.30) .130 – .146 (3.30 – 3.71) .0905 (2.30) BSC .071 (1.80) MAX Package 3-Lead Plastic SOT-223 (LTC DWG # 05-08-1630) .248 – .264 (6.30 – 6.71) .114 – ...

Page 15

... NOM Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LT1121/LT1121-3.3/LT1121 Package 3-Lead Plastic TO-92 (Similar to TO-226) (LTC DWG # 05-08-1410) .180 ± ...

Page 16

... LT1764 Series 3A Fast Transient Response LDO LT1962 Series 300mA, Low Noise, LDO Micropower Regulator LT1963 Series 1.5A Fast Transient Response LDO Burst Mode is a trademark of Linear Technology Corporation. Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

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