LT1627 LINER [Linear Technology], LT1627 Datasheet

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LT1627

Manufacturer Part Number
LT1627
Description
Micropower Low Dropout Regulators with Shutdown
Manufacturer
LINER [Linear Technology]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1627CS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1627IS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
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TYPICAL APPLICATION
0.4V Dropout Voltage
150mA Output Current
30µA Quiescent Current
No Protection Diodes Needed
Adjustable Output from 3.75V 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
5V Battery-Powered Supply with Shutdown
V
8
5
SHDN
IN
SHDN
<0.25
>2.8
NC
LT1121-3.3
(PIN 5)
GND
3
OUTPUT
OUT
OFF
ON
ON
1
LT1121 • TA01
+
1μF
SOLID TANTALUM
3.3V
150mA
OUT
DESCRIPTION
The LT
dropout regulators with shutdown. These devices are ca-
pable of supplying 150mA of output current with a dropout
voltage of 0.4V. Designed for use in battery-powered sys-
tems, the low quiescent current, 30µA operating 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 include
the ability to operate with very small output capacitors.
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 manu-
facturability. 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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
LT1121/LT1121-3.3/LT1121-5
Regulators with Shutdown
Micropower Low Dropout
®
1121/LT1121-3.3/LT1121-5 are micropower low
0.5
0.4
0.3
0.2
0.1
0
0
20
Dropout Voltage
40
OUTPUT CURRENT (mA)
60
80
100
120 140
LT1121 • TA02
160
1121fg
1

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LT1627 Summary of contents

Page 1

FEATURES 0.4V Dropout Voltage n 150mA Output Current n 30µA Quiescent Current n No Protection Diodes Needed n Adjustable Output from 3.75V to 30V n 3.3V and 5V Fixed Output Voltages n Controlled Quiescent Current in Dropout n Shutdown n ...

Page 2

LT1121/LT1121-3.3/LT1121-5 ABSOLUTE MAXIMUM RATINGS (Note 1) Input Voltage LT1121 .............................................................. ± 30V LT1121HV ............................................... +36V, – 30V Output Pin Reverse Current ................................. 10mA Adjust Pin Current ................................................ 10mA Shutdown Pin Input Voltage (Note 2) .......... 6.5V, – 0.6V Shutdown Pin ...

Page 3

ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT1121AHVCS8#PBF LT1121AHVCS8#TRPBF LT1121AIS8#PBF LT1121AIS8#TRPBF LT1121AIS8-3.3#PBF LT1121AIS8-3.3#TRPBF LT1121AIS8-5#PBF LT1121AIS8-5#TRPBF LT1121AHVIS8#PBF LT1121AHVIS8#TRPBF LT1121CST-3.3#PBF LT1121CST-3.3#TRPBF LT1121IST-3.3#PBF LT1121IST-3.3#TRPBF LT1121CST-5#PBF LT1121CST-5#TRPBF LT1121IST-5#PBF LT1121IST-5#TRPBF LT1121CZ3-3#PBF LT1121CZ3-3#TRPBF LT1121IZ3-3#PBF LT1121IZ3-3#TRPBF LT1121CZ-5#PBF LT1121CZ-5#TRPBF LT1121IZ-5#PBF LT1121IZ-5#TRPBF Consult LTC Marketing for parts specified ...

Page 4

LT1121/LT1121-3.3/LT1121-5 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER CONDITIONS Ground Pin Current (Note 7) I LOAD I LOAD I LOAD I LOAD I LOAD I LOAD Adjust Pin Bias Current (Notes Shutdown Threshold ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Guaranteed Dropout Voltage 0.7 0.6 T ≤ 125°C J 0.5 0.4 T ≤ 25°C J 0.3 0.2 0.1 = TEST POINTS 100 120 140 160 20 OUTPUT CURRENT (mA) 1121 G01 LT1121-3.3 ...

Page 6

LT1121/LT1121-3.3/LT1121-5 TYPICAL PERFORMANCE CHARACTERISTICS LT1121-3.3 Ground Pin Current 800 T = 25°C J 700 R = 130Ω LOAD 600 I = 25mA* LOAD 500 R = 330Ω LOAD 400 I = 10mA* LOAD 300 *FOR V = 3.3V OUT 200 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Pin Current SHDN – 100 125 –25 TEMPERATURE (°C) 1121 G19 Reverse Output Current ...

Page 8

LT1121/LT1121-3.3/LT1121-5 TYPICAL PERFORMANCE CHARACTERISTICS Load Regulation 0 = 1mA TO 150mA ΔI LOAD –5 LT1121* LT1121-3.3 –10 –15 –20 –25 LT1121-5 –30 –35 * ADJ PIN TIED TO OUTPUT PIN –40 –50 – 100 TEMPERATURE (°C) ...

Page 9

APPLICATIONS INFORMATION 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 (30µA). In shutdown the quiescent ...

Page 10

LT1121/LT1121-3.3/LT1121-5 APPLICATIONS INFORMATION NC leads were connected to the ground plane. Table 1. N8 Package* COPPER AREA TOPSIDE BACKSIDE BOARD AREA 2500 sq mm 2500 sq mm 2500 sq mm 1000 sq mm 2500 sq mm 2500 sq mm 225 ...

Page 11

APPLICATIONS INFORMATION resistor is shown in Table 6. The LT1121 is a micropower device and output transient response will be a function of output capacitance. See the Transient Response curves in the Typical Performance Characteristics. Larger values of output capacitance ...

Page 12

LT1121/LT1121-3.3/LT1121-5 APPLICATIONS INFORMATION 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 Figure 2. This condition can ...

Page 13

PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ .300 – .325 (7.620 – 8.255) .065 (1.651) .008 – .015 TYP (0.203 – 0.381) +.035 .325 –.015 ( ) +0.889 8.255 –0.381 NOTE: INCHES 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE ...

Page 14

LT1121/LT1121-3.3/LT1121-5 PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ .264 – .287 (6.70 – 7.30) .130 – .146 (3.30 – 3.71) .0905 (2.30) BSC .071 (1.80) MAX .060 ± .010 (1.524 ± 0.254) .140 ± .010 (3.556 ± 0.127) ...

Page 15

REVISION HISTORY (Revision history begins at Rev G) REV DATE DESCRIPTION G 05/12 Changed Order Information top marking for 8-lead SO 3.3V and 5V options, C-grade Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, ...

Page 16

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