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Linear Technology Electronic Components Datasheet

LT1962 Datasheet

Micropower LDO Regulators

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LT1962 Series
300mA, Low Noise,
Micropower
LDO Regulators
Features
nn Low Noise: 20µVRMS (10Hz to 100kHz)
nn Output Current: 300mA
nn Low Quiescent Current: 30µA
nn Wide Input Voltage Range: 1.8V to 20V
nn Low Dropout Voltage: 270mV
nn Very Low Shutdown Current: < 1µA
nn No Protection Diodes Needed
nn Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5V
nn Adjustable Output from 1.22V to 20V
nn Stable with 3.3µF Output Capacitor
nn Stable with Aluminum, Tantalum or
Ceramic Capacitors
nn Reverse Battery Protection
nn No Reverse Current
nn Overcurrent and Overtemperature Protected
nn 8-Lead MSOP Package
Applications
nn Cellular Phones
nn Battery-Powered Systems
nn Noise-Sensitive Instrumentation Systems
Description
The LT®1962 series are micropower, low noise, low dropout
regulators. The devices are capable of supplying 300mA
of output current with a dropout voltage of 270mV. De-
signed for use in battery-powered systems, the low 30µA
quiescent current makes them an ideal choice. Quiescent
current is well controlled; it does not rise in dropout as it
does with many other regulators.
A key feature of the LT1962 regulators is low output noise.
With the addition of an external 0.01µF bypass capacitor,
output noise drops to 20µVRMS over a 10Hz to 100kHz
bandwidth. The LT1962 regulators are stable with output
capacitors as low as 3.3µF. Small ceramic capacitors can
be used without the series resistance required by other
regulators.
Internal protection circuitry includes reverse battery protec-
tion, current limiting, thermal limiting and reverse current
protection. The parts come in fixed output voltages of 1.5V,
1.8V, 2.5V, 3V, 3.3V and 5V, and as an adjustable device
with a 1.22V reference voltage. The LT1962 regulators are
available in the 8-lead MSOP package.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
Typical Application
VIN
3.7V TO
20V
3.3V Low Noise Regulator
IN
OUT
1µF
SENSE
3.3V AT 300mA
+
20µVRMS NOISE
10µF
LT1962-3.3
0.01µF
SHDN BYP
GND
1962 TA01
400
350
300
250
200
150
100
50
0
0
Dropout Voltage
50 100 150 200 250 300
LOAD CURRENT (mA)
1962 TA02
For more information www.linear.com/LT1962
1962fba
1


Linear Technology Electronic Components Datasheet

LT1962 Datasheet

Micropower LDO Regulators

No Preview Available !

LT1962 Series
Absolute Maximum Ratings
(Note 1)
IN Pin Voltage..........................................................±20V
OUT Pin Voltage.......................................................±20V
Input to Output Differential Voltage (Note 2)............±20V
SENSE Pin Voltage...................................................±20V
ADJ Pin Voltage.........................................................±7V
BYP Pin Voltage......................................................±0.6V
SHDN Pin Voltage....................................................±20V
Output Short-Circuit Duration........................... Indefinite
Operating Junction Temperature Range
(Note 3).............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C
Pin Configuration
OUT 1
SENSE/ADJ* 2
BYP 3
GND 4
TOP VIEW
8 IN
7 NC
6 NC
5 SHDN
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 125°C/W
*PIN 2: SENSE FOR LT1962-1.5/LT1962-1.8/
LT1962-2.5/LT1962-3/LT1962-3.3/
LT1962-5. ADJ FOR LT1962
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT1962EMS8#PBF
LT1962EMS8#TRPBF
LTML
8-Lead Plastic MSOP
–40°C to 125°C
LT1962IMS8#PBF
LT1962IMS8#TRPBF
LTML
8-Lead Plastic MSOP
–40°C to 125°C
LT1962EMS8-1.5#PBF
LT1962EMS8-1.5#TRPBF
LTSZ
8-Lead Plastic MSOP
–40°C to 125°C
LT1962EMS8-1.8#PBF
LT1962EMS8-1.8#TRPBF
LTTA
8-Lead Plastic MSOP
–40°C to 125°C
LT1962EMS8-2.5#PBF
LT1962EMS8-2.5#TRPBF
LTPT
8-Lead Plastic MSOP
–40°C to 125°C
LT1962EMS8-3#PBF
LT1962EMS8-3#TRPBF
LTPQ
8-Lead Plastic MSOP
–40°C to 125°C
LT1962EMS8-3.3#PBF
LT1962EMS8-3.3#TRPBF
LTPS
8-Lead Plastic MSOP
–40°C to 125°C
LT1962EMS8-5#PBF
LT1962EMS8-5#TRPBF
LTPR
8-Lead Plastic MSOP
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
PARAMETER
CONDITIONS
MIN TYP MAX
Minimum Operating Voltage
LT1962
ILOAD = 300mA (Notes 4, 12)
l
1.8
2.3
Regulated Output Voltage
(Notes 4, 5)
LT1962-1.5
VIN = 2V, ILOAD = 1mA
2.5V < VIN < 20V, 1mA < ILOAD < 300mA
1.485 1.500 1.515
l 1.462 1.500 1.538
LT1962-1.8
VIN = 2.3V, ILOAD = 1mA
2.8V < VIN < 20V, 1mA < ILOAD < 300mA
1.782 1.800 1.818
l 1.755 1.800 1.845
LT1962-2.5
VIN = 3V, ILOAD = 1mA
3.5V < VIN < 20V, 1mA < ILOAD < 300mA
2.475 2.500 2.525
l 2.435 2.500 2.565
LT1962-3
VIN = 3.5V, ILOAD = 1mA
4V < VIN < 20V, 1mA < ILOAD < 300mA
2.970 3.000 3.030
l 2.925 3.000 3.075
LT1962-3.3
VIN = 3.8V, ILOAD = 1mA
4.3V < VIN < 20V, 1mA < ILOAD < 300mA
3.267 3.300 3.333
l 3.220 3.300 3.380
LT1962-5
VIN = 5.5V, ILOAD = 1mA
6V < VIN < 20V, 1mA < ILOAD < 300mA
4.950 5.000 5.050
l 4.875 5.000 5.125
2
For more information www.linear.com/LT1962
UNITS
V
V
V
V
V
V
V
V
V
V
V
V
V
1962fba


Part Number LT1962
Description Micropower LDO Regulators
Maker Linear Technology
PDF Download

LT1962 Datasheet PDF






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