LT1761 Series
100mA, Low Noise,
LDO Micropower
Regulators in TSOT-23
FEATURES DESCRIPTION
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Low Noise: 20V (10Hz to 100kHz)
The LT 1761 series are micropower, low noise, low
RMS
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Low Quiescent Current: 20A
dropout regulators. With an external 0.01F bypass
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Wide Input Voltage Range: 1.8V to 20V
capacitor, output noise drops to 20V over a 10Hz to
RMS
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Output Current: 100mA
100kHz bandwidth. Designed for use in battery-powered
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Very Low Shutdown Current: <0.1A
systems, the low 20A quiescent current makes them an
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Low Dropout Voltage: 300mV at 100mA
ideal choice. In shutdown, quiescent current drops to less
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Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2V, 2.5V,
than 0.1A. The devices are capable of operating over an
2.8V, 3V, 3.3V, 5V
input voltage from 1.8V to 20V, and can supply 100mA of
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Adjustable Output from 1.22V to 20V
output current with a dropout voltage of 300mV. Quiescent
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Stable with 1F Output Capacitor
current is well controlled, not rising in dropout as it does
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Stable with Aluminum, Tantalum or
with many other regulators.
Ceramic Capacitors
The LT1761 regulators are stable with output capacitors as
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Reverse-Battery Protected
low as 1F. Small ceramic capacitors can be used without
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No Reverse Current
the series resistance required by other regulators.
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No Protection Diodes Needed
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Internal protection circuitry includes reverse battery
Overcurrent and Overtemperature Protected
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protection, current limiting, thermal limiting and reverse
Available in Tiny 5-Lead TSOT-23 Package
current protection. The device is available in xed output
APPLICATIONS voltages of 1.2V, 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V and
5V, and as an adjustable device with a 1.22V reference
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Cellular Phones
voltage. The LT1761 regulators are available in the 5-lead
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Pagers
TSOT-23 package.
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Battery-Powered Systems
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
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Frequency Synthesizers
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
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Wireless Modems
TYPICAL APPLICATION
10Hz to 100kHz Output Noise
5V Low Noise Regulator
5V AT100mA
IN OUT
20V NOISE
V RMS
IN
+
V
OUT
5.4V TO
1F 0.01F 10F
LT1761-5 20V
RMS
100V/DIV
20V
SHDN BYP
1761 TA01
GND
1761 TA01b
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1LT1761 Series
ABSOLUTE MAXIMUM RATINGS (Note 1)
IN Pin Voltage .........................................................20V Output Short-Circuit Duration ........................ Inde nite
OUT Pin Voltage ......................................................20V Operating Junction Temperature Range
Input to Output Differential Voltage .........................20V E, I Grade (Note 2) ............................. 40C to 125C
ADJ Pin Voltage ...................................................... 7V MP Grade (Note 2) ............................. 55C to 125C
BYP Pin Voltage .....................................................0.6V Storage Temperature Range ................... 65C to 150C
SHDN Pin Voltage ................................................. 20V Lead Temperature (Soldering, 10 sec) .................. 300C
PIN CONFIGURATION
LT1761-BYP LT1761-SD LT1761-X
TOP VIEW TOP VIEW TOP VIEW
IN 1 5 OUT IN 1 5 OUT IN 1 5 OUT
GND 2 GND 2 GND 2
BYP 3 4 ADJ SHDN 3 4 ADJ SHDN 3 4 BYP
S5 PACKAGE S5 PACKAGE S5 PACKAGE
5-LEAD PLASTIC TSOT-23 5-LEAD PLASTIC TSOT-23 5-LEAD PLASTIC TSOT-23
T = 150C, = 250C/W T = 150C, = 250C/W T = 150C, = 250C/W
JMAX JA JMAX JA JMAX JA
SEE APPLICATIONS INFORMATION SECTION SEE APPLICATIONS INFORMATION SECTION SEE APPLICATIONS INFORMATION SECTION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING * PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1761ES5-BYP#PBF LT1761ES5-BYP#TRPBF LTGC 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-BYP#PBF LT1761IS5-BYP#TRPBF LTGC 5-Lead Plastic TSOT-23 40C to 125C
LT1761ES5-SD#PBF LT1761ES5-SD#TRPBF LTGH 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-SD#PBF LT1761IS5-SD#TRPBF LTGH 5-Lead Plastic TSOT-23 40C to 125C
LT1761ES5-1.2#PBF LT1761ES5-1.2#TRPBF LTCDS 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-1.2#PBF LT1761IS5-1.2#TRPBF LTCDS 5-Lead Plastic TSOT-23 40C to 125C
LT1761ES5-1.5#PBF LT1761ES5-1.5#TRPBF LTMT 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-1.5#PBF LT1761IS5-1.5#TRPBF LTMT 5-Lead Plastic TSOT-23 40C to 125C
LT1761ES5-1.8#PBF LT1761ES5-1.8#TRPBF LTJM 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-1.8#PBF LT1761IS5-1.8#TRPBF LTJM 5-Lead Plastic TSOT-23 40C to 125C
LT1761MPS5-1.8#PBF LT1761MPS5-1.8#TRPBF LTDCH 5-Lead Plastic TSOT-23 55C to 125C
LT1761ES5-2#PBF LT1761ES5-2#TRPBF LTJE 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-2#PBF LT1761IS5-2#TRPBF LTJE 5-Lead Plastic TSOT-23 40C to 125C
LT1761ES5-2.5#PBF LT1761ES5-2.5#TRPBF LTGD 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-2.5#PBF LT1761IS5-2.5#TRPBF LTGD 5-Lead Plastic TSOT-23 40C to 125C
LT1761ES5-2.8#PBF LT1761ES5-2.8#TRPBF LTLB 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-2.8#PBF LT1761IS5-2.8#TRPBF LTLB 5-Lead Plastic TSOT-23 40C to 125C
LT1761ES5-3#PBF LT1761ES5-3#TRPBF LTGE 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-3#PBF LT1761IS5-3#TRPBF LTGE 5-Lead Plastic TSOT-23 40C to 125C
LT1761ES5-3.3#PBF LT1761ES5-3.3#TRPBF LTGF 5-Lead Plastic TSOT-23 40C to 125C
LT1761IS5-3.3#PBF LT1761IS5-3.3#TRPBF LTGF 5-Lead Plastic TSOT-23 40C to 125C
LT1761MPS5-3.3#PBF LT1761MPS5-3.3#TRPBF LTGF 5-Lead Plastic TSOT-23 55C to 125C
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