IC LDO REG LOW NOISE 1.5A 5-DD

 

LT1963AEQ#PBF

Manufacturer Part NumberLT1963AEQ#PBF
DescriptionIC LDO REG LOW NOISE 1.5A 5-DD
ManufacturerLinear Technology
LT1963AEQ#PBF datasheets

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Specifications of LT1963AEQ#PBF

Regulator TopologyPositive AdjustableVoltage - Output1.21 ~ 20 V
Voltage - Input2.1 ~ 20 VVoltage - Dropout (typical)0.34V @ 1.5A
Number Of Regulators1Current - Output1.5A
Current - Limit (min)1.6AOperating Temperature-40°C ~ 125°C
Mounting TypeSurface MountPackage / CaseTO-263-5, D²Pak (5 leads + Tab), TO-263BA
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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FEATURES
Optimized for Fast Transient Response
n
Output Current: 1.5A
n
Dropout Voltage: 340mV
n
Low Noise: 40µV
(10Hz to 100kHz)
n
RMS
1mA Quiescent Current
n
No Protection Diodes Needed
n
Controlled Quiescent Current in Dropout
n
Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
n
Adjustable Output from 1.21V to 20V
n
< 1µA Quiescent Current in Shutdown
n
Stable with 10µF Output Capacitor*
n
Stable with Ceramic Capacitors*
n
Reverse Battery Protection
n
No Reverse Current
n
Thermal Limiting
n
5-Lead TO-220, DD, 3-Lead SOT-223 and
n
8-Lead SO Packages
APPLICATIONS
3.3V to 2.5V Logic Power Supplies
n
Post Regulator for Switching Supplies
n
TYPICAL APPLICATION
3.3V to 2.5V Regulator
IN
OUT
+
V
> 3V
10µF*
IN
LT1963A-2.5
SHDN
SENSE
GND
1963A TA01
Fast Transient Response
DESCRIPTION
The LT
1963A series are low dropout regulators optimized
®
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
< 1µA in shutdown. Quiescent current is well controlled; it
does not rise in dropout as it does with many other regula-
tors. In addition to fast transient response, the LT1963A
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 LT1963A
regulators are stable with output capacitors as low as
10µF. Internal protection circuitry includes reverse bat-
tery 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
LT1963A regulators are available in 5-lead TO-220, DD,
3-lead SOT-223, 8-lead SO and 16-lead TSSOP packages.
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 6118263, 6144250.
*See Applications Information Section.
400
350
2.5V
300
+
1.5A
10µF*
250
200
*TANTALUM,
150
CERAMIC OR
ALUMINUM ELECTROLYTIC
100
LT1963A Series
1.5A, Low Noise,
LDO Regulators
Dropout Voltage
50
0
0
0.2
0.8
1.0
1.6
0.4
0.6
1.2
1.4
OUTPUT CURRENT (A)
1963A TA02
1963afe
1

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LT1963AEQ#PBF Summary of contents

  • Page 1

    ... SOT-223, 8-lead SO and 16-lead TSSOP packages. 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 6118263, 6144250. ...

  • Page 2

    LT1963A 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 SHDN Pin Voltage ................................................. ...

  • Page 3

    ... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT1963AEQ#PBF LT1963AEQ#TRPBF LT1963AIQ#PBF LT1963AIQ#TRPBF LT1963AMPQ#PBF LT1963AMPQ#TRPBF LT1963AEQ-1.5#PBF LT1963AEQ-1.5#TRPBF LT1963AEQ-1.8#PBF LT1963AEQ-1.8#TRPBF LT1963AEQ-2.5#PBF LT1963AEQ-2.5#TRPBF LT1963AEQ-3.3#PBF LT1963AEQ-3.3#TRPBF LT1963AET#PBF LT1963AET#TRPBF LT1963AIT#PBF LT1963AIT#TRPBF LT1963AET-1.5#PBF LT1963AET-1.5#TRPBF LT1963AET-1.8#PBF LT1963AET-1.8#TRPBF LT1963AET-2.5#PBF LT1963AET-2.5#TRPBF LT1963AET-3.3#PBF LT1963AET-3.3#TRPBF LT1963AEFE#PBF LT1963AEFE#TRPBF LT1963AIFE#PBF LT1963AIFE#TRPBF LT1963AEFE-1.5#PBF LT1963AEFE-1.5#TRPBF LT1963AEFE-1.8#PBF LT1963AEFE-1 ...

  • Page 4

    LT1963A Series ORDER INFORMATION LEAD BASED FINISH TAPE AND REEL LT1963AET-1.5 LT1963AET-1.5#TR LT1963AET-1.8 LT1963AET-1.8#TR LT1963AET-2.5 LT1963AET-2.5#TR LT1963AET-3.3 LT1963AET-3.3#TR LT1963AEFE LT1963AEFE#TR LT1963AIFE LT1963AIFE#TR LT1963AEFE-1.5 LT1963AEFE-1.5#TR LT1963AEFE-1.8 LT1963AEFE-1.8#TR LT1963AEFE-2.5 LT1963AEFE-2.5#TR LT1963AEFE-3.3 LT1963AEFE-3.3#TR LT1963AEST-1.5 LT1963AEST-1.5#TR LT1963AEST-1.8 LT1963AEST-1.8#TR LT1963AEST-2.5 LT1963AEST-2.5#TR LT1963AEST-3.3 LT1963AEST-3.3#TR LT1963AES8 LT1963AES8#TR ...

  • Page 5

    ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER CONDITIONS Minimum Input Voltage (Notes 4,12) I LOAD I LOAD Regulated Output Voltage (Note 5) LT1963A-1.5 LT1963A-1.8 LT1963A-2.5 LT1963A-3.3 ADJ Pin Voltage (Notes 4, 5) LT1963A Line Regulation LT1963A-1.5 LT1963A-1.8 ...

  • Page 6

    LT1963A Series ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER CONDITIONS Ripple Rejection RIPPLE Current Limit Input Reverse Leakage Current (Note 13 Packages ST Package Reverse Output Current ...

  • Page 7

    TYPICAL PERFORMANCE CHARACTERISTICS Typical Dropout Voltage 500 450 400 350 T = 125°C J 300 250 T = 25°C 200 J 150 100 50 0 1.4 0 0.2 0.4 0.6 0.8 1.0 1.2 OUTPUT CURRENT (A) 1963A G01 Quiescent Current ...

  • Page 8

    LT1963A Series TYPICAL PERFORMANCE CHARACTERISTICS LT1963A-1.5 Quiescent Current 25° ∞ SHDN ...

  • Page 9

    TYPICAL PERFORMANCE CHARACTERISTICS LT1963A GND Pin Current 25° SHDN IN *FOR V = 1.21V 8 OUT R = 4.33 300mA 12. 100mA* L ...

  • Page 10

    LT1963A Series TYPICAL PERFORMANCE CHARACTERISTICS SHDN Pin Input Current 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 SHDN PIN VOLTAGE (V) 1963A G24 Current Limit 3.0 ...

  • Page 11

    TYPICAL PERFORMANCE CHARACTERISTICS Ripple Rejection 100µF TANTALUM OUT 30 +10 × 1µF CERAMIC C = 10µF TANTALUM 20 OUT 0.75A +1V + 50mV RIPPLE IN OUT(NOMINAL) ...

  • Page 12

    LT1963A Series TYPICAL PERFORMANCE CHARACTERISTICS LT1963A-3.3 Transient Response 200 3.3µF TANTALUM 150 10µF TANTALUM OUT 100 50 0 –50 –100 0.6 0.4 0 ...

  • Page 13

    PIN FUNCTIONS OUT: Output. The output supplies power to the load. A minimum output capacitor of 10µF is required to prevent oscillations. Larger output capacitors will be required for applications with large transient loads to limit peak voltage transients. See ...

  • Page 14

    LT1963A Series APPLICATIONS INFORMATION The LT1963A 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 current (1mA) drops to less ...

  • Page 15

    APPLICATIONS INFORMATION Table 1. Capacitor Minimum ESR V 10µF 22µF OUT 1.2V 20mΩ 15mΩ 1.5V 20mΩ 15mΩ 1.8V 15mΩ 10mΩ 2.5V 5mΩ 5mΩ 3.3V 0mΩ 0mΩ ≥5V 0mΩ 0mΩ Figures 3 through 8 show the effect of ESR on the ...

  • Page 16

    LT1963A Series APPLICATIONS INFORMATION 100 1963A F03 20µs/DIV Figure 100 1963A F04 20µs/DIV Figure 100 1963A F05 20µs/DIV Figure 1.2V OUT I = 500mA ...

  • Page 17

    APPLICATIONS INFORMATION Y5V dielectrics are good for providing high capacitances in a small package, but exhibit strong voltage and temperature coefficients as shown in Figures 10 and 11. When used with a 5V regulator, a 10µF Y5V capacitor can exhibit ...

  • Page 18

    LT1963A Series APPLICATIONS INFORMATION This resistor should be made using one of the inner layers of the PC board which are well defined. The resistiv- ity is determined primarily by the sheet resistance of the copper laminate with no additional ...

  • Page 19

    APPLICATIONS INFORMATION The following tables list thermal resistance for several different board sizes and copper areas. All measurements were taken in still air on 1/16" FR-4 board with one ounce copper. Table 3. Q Package, 5-Lead DD COPPER AREA TOPSIDE* ...

  • Page 20

    LT1963A Series APPLICATIONS INFORMATION The output of the LT1963A can be pulled below ground without damaging the device. If the input is left open circuit or grounded, the output can be pulled below ground by 20V. For fixed voltage versions, ...

  • Page 21

    TYPICAL APPLICATIONS L2 10VAC AT 115V IN 90-140 VAC 10VAC AT 115V IN 1N4002 “SYNC” 1N4002 2.4k TO ALL “+V” + POINTS 22µF 750 V > 3.7V IN SCR Pre-Regulator Provides Efficiency Over Line Variations L1 500µH 1N4148 + 10000µF ...

  • Page 22

    LT1963A Series PACKAGE DESCRIPTION .060 .256 (1.524) (6.502) .060 .183 (1.524) (4.648) .075 (1.905) .300 (7.620) BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK .067 RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN INCH/(MILLIMETER) 2. ...

  • Page 23

    PACKAGE DESCRIPTION .050 BSC .245 MIN .030 ±.005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 – .020 (0.254 – 0.508) .008 – .010 (0.203 – 0.254) (0.406 – 1.270) NOTE: 1. DIMENSIONS IN (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE ...

  • Page 24

    LT1963A Series PACKAGE DESCRIPTION .248 – .264 (6.30 – 6.71) .114 – .124 (2.90 – 3.15) .264 – .287 (6.70 – 7.30) .130 – .146 (3.30 – 3.71) .0905 (2.30) BSC .071 (1.80) MAX .024 – .033 (0.60 – 0.84) ...

  • Page 25

    PACKAGE DESCRIPTION .390 – .415 (9.906 – 10.541) .460 – .500 (11.684 – 12.700) .067 BSC .028 – .038 (1.70) (0.711 – 0.965) T Package 5-Lead Plastic TO-220 (Standard) (Reference LTC DWG # 05-08-1421) .147 – .155 (3.734 – 3.937) ...

  • Page 26

    LT1963A Series PACKAGE DESCRIPTION 6.60 ±0.10 4.50 ±0.10 SEE NOTE 4 RECOMMENDED SOLDER PAD LAYOUT 4.30 – 4.50* (.169 – .177) 0.09 – 0.20 (.0035 – .0079) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. DIMENSIONS ARE IN 3. DRAWING NOT TO ...

  • Page 27

    ... Updated FE and Q package drawings in Package Description section Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

  • Page 28

    ... I 3µ 1.8V to 20V 1.2V to 19.5V, RMS IN OUT = 0.15V 120µA, I <3µ 0.30V 40µA, I <1µ 0.30V 60µA, I <1µ 1.2V to 36V, RMS IN set; directly parallelable OUT LT 0211 REV E • PRINTED IN USA  LINEAR TECHNOLOGY CORPORA TION 2005 1963afe ...

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