LT1962 Series
300mA, Low Noise,
Micropower
LDO Regulators
Fea T Descrip T
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Low Noise: 20V (10Hz to 100kHz) The LT 1962 series are micropower, low noise, low dropout
RMS
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Output Current: 300mA regulators. The devices are capable of supplying 300mA
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Low Quiescent Current: 30A of output current with a dropout voltage of 270mV. De-
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Wide Input Voltage Range: 1.8V to 20V signed for use in battery-powered systems, the low 30A
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Low Dropout Voltage: 270mV quiescent current makes them an ideal choice. Quiescent
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Very Low Shutdown Current: < 1A current is well controlled; it does not rise in dropout as it
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No Protection Diodes Needed does with many other regulators.
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Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5V
A key feature of the LT1962 regulators is low output noise.
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Adjustable Output from 1.22V to 20V
With the addition of an external 0.01F bypass capacitor,
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Stable with 3.3F Output Capacitor
output noise drops to 20V over a 10Hz to 100kHz
RMS
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Stable with Aluminum, Tantalum or
bandwidth. The LT1962 regulators are stable with output
Ceramic Capacitors
capacitors as low as 3.3F. Small ceramic capacitors can
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Reverse Battery Protection
be used without the series resistance required by other
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No Reverse Current
regulators.
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Overcurrent and Overtemperature Protected
n Internal protection circuitry includes reverse battery protec-
8-Lead MSOP Package
tion, current limiting, thermal limiting and reverse current
protection. The parts come in fixed output voltages of 1.5V,
a T
1.8V, 2.5V, 3V, 3.3V and 5V, and as an adjustable device
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Cellular Phones
with a 1.22V reference voltage. The LT1962 regulators are
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Battery-Powered Systems
available in the 8-lead MSOP package.
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Noise-Sensitive Instrumentation Systems
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 a T
Dropout Voltage
400
3.3V Low Noise Regulator
350
3.3V AT 300mA
300
IN OUT
V
20V NOISE
IN + RMS
3.7V TO
1F
SENSE 250
10F
20V
LT1962-3.3
0.01F
200
SHDN BYP
150
GND
1962 TA01
100
50
0
0 50 100 150 200 250 300
LOAD CURRENT (mA)
1962 TA02
1962fb1962fa
1
For more information www.linear.com/LT1962
DROPOUT VOLTAGE (mV)
ion pplica
ions pplica
ion uresLT1962 Series
a T e Maxi Mu M r a T p c F T
(Note 1)
IN Pin Voltage .........................................................20V
TOP VIEW
OUT Pin Voltage ......................................................20V
OUT 1 8 IN
SENSE/ADJ* 2 7 NC
Input to Output Differential Voltage (Note 2) ...........20V
6 NC
BYP 3
SENSE Pin Voltage ..................................................20V GND 4 5 SHDN
ADJ Pin Voltage ........................................................7V MS8 PACKAGE
8-LEAD PLASTIC MSOP
BYP Pin Voltage .....................................................0.6V
T = 150C, = 125C/W
JMAX JA
SHDN Pin Voltage ...................................................20V
*PIN 2: SENSE FOR LT1962-1.5/LT1962-1.8/
Output Short-Circuit Duration .......................... Indefinite
LT1962-2.5/LT1962-3/LT1962-3.3/
LT1962-5. ADJ FOR LT1962
Operating Junction Temperature Range
(Note 3) ............................................. 40C to 125C
Storage Temperature Range .................. 65C to 150C
Lead Temperature (Soldering, 10 sec) ...................300C
o r D i n F Ma T
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1962EMS8#PBF LT1962EMS8#TRPBF LTML 8-Lead Plastic MSOP 40C to 125C
LT1962IMS8#PBF LT1962IMS8#TRPBF LTML 8-Lead Plastic MSOP 40C to 125C
LT1962EMS8-1.5#PBF LT1962EMS8-1.5#TRPBF LTSZ 8-Lead Plastic MSOP 40C to 125C
LT1962EMS8-1.8#PBF LT1962EMS8-1.8#TRPBF LTTA 8-Lead Plastic MSOP 40C to 125C
LT1962EMS8-2.5#PBF LT1962EMS8-2.5#TRPBF LTPT 8-Lead Plastic MSOP 40C to 125C
LT1962EMS8-3#PBF LT1962EMS8-3#TRPBF LTPQ 8-Lead Plastic MSOP 40C to 125C
LT1962EMS8-3.3#PBF LT1962EMS8-3.3#TRPBF LTPS 8-Lead Plastic MSOP 40C to 125C
LT1962EMS8-5#PBF LT1962EMS8-5#TRPBF LTPR 8-Lead Plastic MSOP 40C to 125C
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: