LT1963EST LINEAR [Linear Integrated Systems], LT1963EST Datasheet

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LT1963EST

Manufacturer Part Number
LT1963EST
Description
1.5A, Low Noise, Fast Transient Response LDO Regulators
Manufacturer
LINEAR [Linear Integrated Systems]
Datasheet

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Part Number:
LT1963EST
Manufacturer:
LT
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10 000
Part Number:
LT1963EST-1.5
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LINEAR
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20 000
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LT1963EST-1.5#TRPBF
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Part Number:
LT1963EST-1.8
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LT1963EST-1.8#TRPBF
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LINEAR/凌特
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LT1963EST-1.8#TRPBF
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Part Number:
LT1963EST-2.5
Manufacturer:
LT
Quantity:
20 000
Part Number:
LT1963EST-3.3
Manufacturer:
Linear Technology
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1 902
Part Number:
LT1963EST33
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LT
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6 487
FEATURES
TYPICAL
APPLICATIO S
Optimized for Fast Transient Response
Output Current: 1.5A
Dropout Voltage: 340mV
Low Noise: 40 V
1mA Quiescent Current
No Protection Diodes Needed
Controlled Quiescent Current in Dropout
Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
Adjustable Output from 1.21V to 20V
< 1 A Quiescent Current in Shutdown
Stable with 10 F Output Capacitor
Reverse Battery Protection
No Reverse Current
Thermal Limiting
3.3V to 2.5V Logic Power Supplies
Post Regulator for Switching Supplies
V
IN
> 3V
APPLICATION
+
10 F
U
RMS
3.3V to 2.5V Regulator
(10Hz to 100kHz)
IN
SHDN
LT1963-2.5
GND
SENSE
U
OUT
+
10 F
1963 TA01
2.5V
1.5A
DESCRIPTIO
The LT
for fast transient response. The devices are capable of
supplying 1.5A of output current with a dropout voltage of
340mV. Operating quiescent current is 1mA, dropping to
< 1 A in shutdown. Quiescent current is well controlled; it
does not rise in dropout as it does with many other
regulators. In addition to fast transient response, the
LT1963 regulators have very low output noise which
makes them ideal for sensitive RF supply applications.
Output voltage range is from 1.21V to 20V. The LT1963
regulators are stable with output capacitors as low as
10 F. Internal protection circuitry includes reverse battery
protection, current limiting, thermal limiting and reverse
current protection. The devices are available in fixed
output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an
adjustable device with a 1.21V reference voltage. The
LT1963 regulators are available in 5-lead TO-220, DD,
3-lead SOT-223 and 8-lead SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Fast Transient Response
®
1963 series are low dropout regulators optimized
400
350
300
250
200
150
100
50
0
0
0.2
U
0.4
OUTPUT CURRENT (A)
Dropout Voltage
1.5A, Low Noise,
LDO Regulators
0.6
0.8
1.0
LT1963 Series
1.2
1.4
1963 TA02
1.6
1963fa
1

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LT1963EST Summary of contents

Page 1

FEATURES Optimized for Fast Transient Response Output Current: 1.5A Dropout Voltage: 340mV Low Noise (10Hz to 100kHz) RMS 1mA Quiescent Current No Protection Diodes Needed Controlled Quiescent Current in Dropout Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V Adjustable ...

Page 2

... SENSE FOR LT1963-1.8/LT1963-2.5/LT1963-3.3 = ADJ FOR LT1963 T = 150 C, JMAX ORDER PART NUMBER LT1963EST-1.5 LT1963EST-1.8 OUT 1 LT1963EST-2.5 SENSE/ADJ* 2 GND 3 LT1963EST-3 8-LEAD PLASTIC SO ST PART MARKING *PIN 2 = SENSE FOR LT1963-1.8/LT1963-2.5/LT1963-3.3 = ADJ FOR LT1963 T = 150 C, JMAX 196315 196318 196325 196333 ...

Page 3

ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are T PARAMETER CONDITIONS LT1963-2.5 LT1963-3.3 ADJ Pin Voltage LT1963 (Notes 4, 5) Line Regulation LT1963-1.5 LT1963-1.8 LT1963-2.5 LT1963-3.3 LT1963 (Note 4) Load Regulation LT1963-1.5 ...

Page 4

LT1963 Series ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Absolute maximum input to output differential voltage can not be achieved with all combinations of rated ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS LT1963-3.3 Output Voltage 3. 1mA L 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 –50 – 100 125 TEMPERATURE ( C) 1963 G07 LT1963-2.5 Quiescent Current 14 ...

Page 6

LT1963 Series W U TYPICAL PERFOR A CE CHARACTERISTICS LT1963 GND Pin Current SHDN IN *FOR V = 1.21V 8 OUT R = 4.33 300mA ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS SHDN Pin Input Current 20V SHDN –50 – 100 125 TEMPERATURE ( C) 1963 G25 Current Limit 4.0 V ...

Page 8

LT1963 Series W U TYPICAL PERFOR A CE CHARACTERISTICS LT1963 Minimum Input Voltage 3 500mA L 2 100mA L 1.5 1.0 0.5 0 –50 – 100 125 ...

Page 9

CTIO S OUT: Output. The output supplies power to the load. A minimum output capacitor required to prevent oscillations. Larger output capacitors will be required for applications with large transient loads ...

Page 10

LT1963 Series U U APPLICATIO S I FOR ATIO The LT1963 series are 1.5A low dropout regulators opti- mized for fast transient response. The devices are capable of supplying 1. dropout voltage of 350mV. The low operating quiescent ...

Page 11

U U APPLICATIO S I FOR ATIO 20 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE X5R –20 –40 –60 Y5V –80 –100 BIAS VOLTAGE (V) Figure 3. Ceramic Capacitor ...

Page 12

LT1963 Series U U APPLICATIO S I FOR ATIO Thermal Considerations The power handling capability of the device is limited by the maximum rated junction temperature (125 C). The power dissipated by the device is made up of two components: ...

Page 13

U U APPLICATIO S I FOR ATIO The maximum junction temperature will then be equal to the maximum junction temperature rise above ambient plus the maximum ambient temperature or 39 89.5 C JMAX ...

Page 14

LT1963 Series U TYPICAL APPLICATIO S SCR Pre-Regulator Provides Efficiency Over Line Variations L2 10VAC AT 115V IN 90-140 VAC 10VAC AT 115V IN 1N4002 1N4002 “SYNC” 2.4k 1N4002 TO ALL “+V” + POINTS 22 F 750 PACKAGE DESCRIPTIO 0.060 ...

Page 15

PACKAGE DESCRIPTIO 0.010 – 0.020 45 (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.016 – 0.050 (0.406 – 1.270) * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES ...

Page 16

LT1963 Series U TYPICAL APPLICATIO S Adjustable Current Source R5 0. > 2. LT1004-1 2.2k 2.2k 80. NOTE: ADJUST R1 FOR 3 ...

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