LT1763 Series
500mA, Low Noise, LDO
Micropower Regulators
Fea T Descrip T
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Low Noise: 20V (10Hz to 100kHz)
The LT 1763 series are micropower, low noise, low dropout
RMS
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Output Current: 500mA
regulators. The devices are capable of supplying 500mA of
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Low Quiescent Current: 30A
output current with a dropout voltage of 300mV. Designed
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Wide Input Voltage Range: 1.8V to 20V
for use in battery-powered systems, the low 30A quiescent
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Low Dropout Voltage: 300mV
current makes them an ideal choice. Quiescent current is
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Very Low Shutdown Current: < 1A
well controlled; it does not rise in dropout as it does with
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No Protection Diodes Needed
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 LT1763 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 Ceramic
bandwidth. The LT1763 regulators are stable with output
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
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Internal protection circuitry includes reverse battery
8-Lead SO and 12-Lead (4mm 3mm) DFN
protection, current limiting, thermal limiting and reverse
Packages
current protection. The parts come in fixed output voltages
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of 1.5V, 1.8V, 2.5V, 3V, 3.3V and 5V, and as an adjustable
device with a 1.22V reference voltage. The LT1763 regu-
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Cellular Phones
lators are available in 8-lead SO and 12-lead, low profile
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Battery-Powered Systems
(4mm 3mm 0.75mm) DFN packages.
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Noise-Sensitive Instrumentation Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents including 6144250, 6118263.
Typical a T
Dropout Voltage
400
3.3V Low Noise Regulator
350
3.3V AT 500mA
300
IN OUT
V
20V NOISE
IN + RMS
3.7V TO
1F
SENSE
10F 250
20V
LT1763-3.3
0.01F
200
SHDN
BYP
150
GND
100
1763 TA01
50
0
0 100 200 300 400 500
OUTPUT CURRENT (mA)
1763 TA02
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For more information www.linear.com/LT1763
DROPOUT VOLTAGE (mV)
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a Te Maxi Mu M r a T (Note 1)
IN Pin Voltage ........................................................ 20V Operating Junction Temperature Range (Note 2)
OUT Pin Voltage ..................................................... 20V C, I Grade ...........................................40C to 125C
Input to Output Differential Voltage ........................ 20V MP Grade ...........................................55C to 125C
SENSE Pin Voltage ............................................... 20V Storage Temperature Range
ADJ Pin Voltage ...................................................... 7V S8 Package ........................................65C to 150C
BYP Pin Voltage .....................................................0.6V DFN Package ......................................65C to 150C
SHDN Pin Voltage ................................................ 20V Lead Temperature (Soldering, 10 sec)
Output Short-Circuit Duration ........................ Indefinite S8 Package ....................................................... 300C
pin con F T
TOP VIEW
NC 1 12 NC TOP VIEW
OUT 2 11 IN
OUT 1 8 IN
OUT 3 10 IN
SENSE/ADJ* 2 7 GND
13
NC 4 9 NC
GND
GND 3 6 GND
SENSE/ADJ* 5 8 SHDN
BYP 4 5 SHDN
BYP 6 7 GND
S8 PACKAGE
8-LEAD PLASTIC SO
DE PACKAGE
12-LEAD (4mm 3mm) PLASTIC DFN
T = 150C, = 70C/W, = 35C/W
JMAX JA JC
T = 125C, = 40C/W, = 5C/W
JMAX JA JC
*PIN 2: SENSE FOR LT1763-1.5/LT1763-1.8/LT1763-2.5/LT1763-3/LT1763-3.3/LT1763-5
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
ADJ FOR LT1763
*PIN 5: SENSE FOR LT1763-1.5/LT1763-1.8/LT1763-2.5/LT1763-3/LT1763-3.3/LT1763-5
SEE THE APPLICATIONS INFORMATION SECTION.
ADJ FOR LT1763
SEE THE APPLICATIONS INFORMATION SECTION.
Der in F Ma T
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1763CDE#PBF LT1763CDE#TRPBF 1763 12-Lead (4mm 3mm) Plastic DFN 40C to 125C
LT1763IDE#PBF LT1763IDE#TRPBF 1763 40C to 125C
12-Lead (4mm 3mm) Plastic DFN
LT1763MPDE#PBF LT1763MPDE#TRPBF 1763 12-Lead (4mm 3mm) Plastic DFN 55C to 125C
LT1763CDE-1.5#PBF LT1763CDE-1.5#TRPBF 76315 12-Lead (4mm 3mm) Plastic DFN 40C to 125C
LT1763IDE-1.5#PBF LT1763IDE-1.5#TRPBF 76315 12-Lead (4mm 3mm) Plastic DFN 40C to 125C
LT1763MPDE-1.5#PBF LT1763MPDE-1.5#TRPBF 76315 12-Lead (4mm 3mm) Plastic DFN 55C to 125C
LT1763CDE-1.8#PBF LT1763CDE-1.8#TRPBF 76318 40C to 125C
12-Lead (4mm 3mm) Plastic DFN
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2
For more information www.linear.com/LT1763
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