ANALOG DEVICES LT 1963 AEQ Datasheet

LT1963A Series

OUTPUT CURRENT (A)

0

DROPOUT VOLTAGE (mV)

200

300

1.6

1963A TA02

100

0

0.4

0.8

1.2

0.2

0.6

1.0

1.4

400

150

250

50

350

, LTC and LT are registered trademarks 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.

1.5A, Low Noise,

Fast Transient Response

LDO Regulators

FEATURES

n

Optimized for Fast Transient Response

n

Output Current: 1.5A

n

Dropout Voltage: 340mV

n

Low Noise: 40μV

n

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

(10Hz to 100kHz)

RMS

8-Lead SO Packages

APPLICATIONS

n

3.3V to 2.5V Logic Power Supplies

n

Post Regulator for Switching Supplies

DESCRIPTION

®

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
<1μA 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 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 battery
protection, current limiting, thermal limiting and reverse
current protection. The devices are available in fi xed 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.

1963A series are low dropout regulators optimized

TYPICAL APPLICATION

3.3V to 2.5V Regulator

IN

VIN> 3V

10μF*

SHDN

LT1963A-2.5

SENSE

GND

1963A TA01

OUT

++

*TANTALUM,
CERAMIC OR
ALUMINUM ELECTROLYTIC

2.5V

1.5A

10μF*

Dropout Voltage

1963afd

1

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 ................................................. ±20V

Output Short-Circuit Duration ........................ Indefi nite

PIN CONFIGURATION

FRONT VIEW

5

TAB IS

GND

*PIN 5 = SENSE FOR LT1963A-1.5/LT1963A-1.8/

5-LEAD PLASTIC DD

LT1963A-2.5/LT1963A-3.3

= ADJ FOR LT1963A

T

JMAX

4
3
2
1

Q PACKAGE

= 150°C, θJA = 30°C/ W

SENSE/ADJ*
OUT
GND
IN

SHDN

TAB IS

GND

*PIN 5 = SENSE FOR LT1963A-1.5/LT1963A-1.8/

FRONT VIEW

T PACKAGE

5-LEAD PLASTIC TO-220

LT1963A-2.5/LT1963A-3.3

= ADJ FOR LT1963A

= 150°C, θJA = 50°C/ W

T

JMAX

Operating Junction Temperature Range (Note 3)

LT1963AE ...........................................–40°C to 125°C

LT1963AI............................................–40°C to 125°C

LT1963AMP .......................................–55°C to 125°C

Storage Temperature Range ...................–65°C to 150°C

Lead Temperature (Soldering, 10 sec) ..................300°C

TOP VIEW

1

GND

2

NC

3

5
4
3
2
1

SENSE/
ADJ*

OUT
GND
IN

SHDN

*PIN 6 = SENSE FOR LT1963A-1.5/LT1963A-1.8/

OUT

4

OUT

OUT

SENSE/ADJ*

GND

GND

EXPOSED PAD (PIN 17) IS GND. MUST BE

LT1963A-2.5/LT1963A-3.3

= ADJ FOR LT1963A

T

JMAX

17

5

6

7

8

FE PACKAGE

16-LEAD PLASTIC TSSOP

SOLDERED TO THE PCB.

= 150°C, θJA = 38°C/ W

GND

16

NC

15

IN

14

IN

13

IN

12

NC

11

SHDN

10

GND

9

2

TAB IS

GND

3-LEAD PLASTIC SOT-223

T

= 150°C, θJA = 50°C/ W

JMAX

FRONT VIEW

ST PACKAGE

TOP VIEW

OUT

3

OUT

2

GND

1

IN

SENSE/ADJ*

*PIN 2 = SENSE FOR LT1963A-1.5/LT1963A-1.8/

1

2

GND

3

NC

4

S8 PACKAGE

8-LEAD PLASTIC SO

LT1963A-2.5/LT1963A-3.3

= ADJ FOR LT1963A

= 150°C, θJA = 70°C/ W

T

JMAX

IN

8

GND

7

GND

6

SHDN

5

1963afd

LT1963A Series

ORDER INFORMATION

LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LT1963AEQ#PBF LT1963AEQ#TRPBF LT1963AEQ 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AIQ#PBF LT1963AIQ#TRPBF LT1963AIQ 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AMPQ#PBF LT1963AMPQ#TRPBF LT1963AMPQ 5-Lead Plastic DD-PAK –55°C to 125°C
LT1963AEQ-1.5#PBF LT1963AEQ-1.5#TRPBF LT1963AEQ-1.5 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AEQ-1.8#PBF LT1963AEQ-1.8#TRPBF LT1963AEQ-1.8 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AEQ-2.5#PBF LT1963AEQ-2.5#TRPBF LT1963AEQ-2.5 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AEQ-3.3#PBF LT1963AEQ-3.3#TRPBF LT1963AEQ-3.3 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AET#PBF LT1963AET#TRPBF LT1963AET 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AIT#PBF LT1963AIT#TRPBF LT1963AIT 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AET-1.5#PBF LT1963AET-1.5#TRPBF LT1963AET-1.5 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AET-1.8#PBF LT1963AET-1.8#TRPBF LT1963AET-1.8 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AET-2.5#PBF LT1963AET-2.5#TRPBF LT1963AET-2.5 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AET-3.3#PBF LT1963AET-3.3#TRPBF LT1963AET-3.3 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AEFE#PBF LT1963AEFE#TRPBF 1963AEFE 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AIFE#PBF LT1963AIFE#TRPBF 1963AIFE 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEFE-1.5#PBF LT1963AEFE-1.5#TRPBF 1963AEFE15 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEFE-1.8#PBF LT1963AEFE-1.8#TRPBF 1963AEFE18 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEFE-2.5#PBF LT1963AEFE-2.5#TRPBF 1963AEFE25 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEFE-3.3#PBF LT1963AEFE-3.3#TRPBF 1963AEFE33 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEST-1.5#PBF LT1963AEST-1.5#TRPBF 963A15 3-Lead Plastic SOT-223 –40°C to 125°C
LT1963AEST-1.8#PBF LT1963AEST-1.8#TRPBF 963A18 3-Lead Plastic SOT-223 –40°C to 125°C
LT1963AEST-2.5#PBF LT1963AEST-2.5#TRPBF 963A25 3-Lead Plastic SOT-223 –40°C to 125°C
LT1963AEST-3.3#PBF LT1963AEST-3.3#TRPBF 963A33 3-Lead Plastic SOT-223 –40°C to 125°C
LT1963AES8#PBF LT1963AES8#TRPBF 1963A 8-Lead Plastic SO –40°C to 125°C
LT1963AIS8#PBF LT1963AIS8#TRPBF 1963A 8-Lead Plastic SO –40°C to 125°C
LT1963AMPS8#PBF LT1963AMPS8#TRPBF 963AMP 8-Lead Plastic SO –55°C to 125°C
LT1963AES8-1.5#PBF LT1963AES8-1.5#TRPBF 963A15 8-Lead Plastic SO –40°C to 125°C
LT1963AES8-1.8#PBF LT1963AES8-1.8#TRPBF 963A18 8-Lead Plastic SO –40°C to 125°C
LT1963AES8-2.5#PBF LT1963AES8-2.5#TRPBF 963A25 8-Lead Plastic SO –40°C to 125°C
LT1963AES8-3.3#PBF LT1963AES8-3.3#TRPBF 963A33 8-Lead Plastic SO –40°C to 125°C

LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LT1963AEQ LT1963AEQ#TR LT1963AEQ 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AIQ LT1963AIQ#TR LT1963AIQ 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AMPQ LT1963AMPQ#TR LT1963AMPQ 5-Lead Plastic DD-PAK –55°C to 125°C
LT1963AEQ-1.5 LT1963AEQ-1.5#TR LT1963AEQ-1.5 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AEQ-1.8 LT1963AEQ-1.8#TR LT1963AEQ-1.8 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AEQ-2.5 LT1963AEQ-2.5#TR LT1963AEQ-2.5 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AEQ-3.3 LT1963AEQ-3.3#TR LT1963AEQ-3.3 5-Lead Plastic DD-PAK –40°C to 125°C
LT1963AET LT1963AET#TR LT1963AET 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AIT LT1963AIT#TR LT1963AIT 5-Lead Plastic TO-220 –40°C to 125°C

1963afd

3

LT1963A Series

ORDER INFORMATION

LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LT1963AET-1.5 LT1963AET-1.5#TR LT1963AET-1.5 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AET-1.8 LT1963AET-1.8#TR LT1963AET-1.8 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AET-2.5 LT1963AET-2.5#TR LT1963AET-2.5 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AET-3.3 LT1963AET-3.3#TR LT1963AET-3.3 5-Lead Plastic TO-220 –40°C to 125°C
LT1963AEFE LT1963AEFE#TR 1963AEFE 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AIFE LT1963AIFE#TR 1963AIFE 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEFE-1.5 LT1963AEFE-1.5#TR 1963AEFE15 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEFE-1.8 LT1963AEFE-1.8#TR 1963AEFE18 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEFE-2.5 LT1963AEFE-2.5#TR 1963AEFE25 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEFE-3.3 LT1963AEFE-3.3#TR 1963AEFE33 16-Lead Plastic TSSOP –40°C to 125°C
LT1963AEST-1.5 LT1963AEST-1.5#TR 963A15 3-Lead Plastic SOT-223 –40°C to 125°C
LT1963AEST-1.8 LT1963AEST-1.8#TR 963A18 3-Lead Plastic SOT-223 –40°C to 125°C
LT1963AEST-2.5 LT1963AEST-2.5#TR 963A25 3-Lead Plastic SOT-223 –40°C to 125°C
LT1963AEST-3.3 LT1963AEST-3.3#TR 963A33 3-Lead Plastic SOT-223 –40°C to 125°C
LT1963AES8 LT1963AES8#TR 1963A 8-Lead Plastic SO –40°C to 125°C
LT1963AIS8 LT1963AIS8#TR 1963A 8-Lead Plastic SO –40°C to 125°C
LT1963AMPS8 LT1963AMPS8#TR 963AMP 8-Lead Plastic SO –55°C to 125°C
LT1963AES8-1.5 LT1963AES8-1.5#TR 963A15 8-Lead Plastic SO –40°C to 125°C
LT1963AES8-1.8 LT1963AES8-1.8#TR 963A18 8-Lead Plastic SO –40°C to 125°C
LT1963AES8-2.5 LT1963AES8-2.5#TR 963A25 8-Lead Plastic SO –40°C to 125°C
LT1963AES8-3.3 LT1963AES8-3.3#TR 963A33 8-Lead Plastic SO –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.

For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:

http://www.linear.com/leadfree/

http://www.linear.com/tapeandreel/

4

1963afd

LT1963A Series

The l denotes specifi cations which apply over the full operating

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifi cations are at T

PARAMETER CONDITIONS MIN TYP MAX UNITS

Minimum Input Voltage (Notes 4,12) I

Regulated Output Voltage (Note 5) LT1963A-1.5 V

ADJ Pin Voltage (Notes 4, 5) LT1963A VIN = 2.21V, I

Line Regulation LT1963A-1.5 ΔVIN = 2.21V to 20V, I

Load Regulation LT1963A-1.5 V

Dropout Voltage
V

= V

IN

OUT(NOMINAL)

(Notes 6, 7, 12)

GND Pin Current
V

= V

IN

OUT(NOMINAL)

+ 1V

(Notes 6, 8)

Output Voltage Noise C
ADJ Pin Bias Current (Notes 4, 9) 3 10 μA
Shutdown Threshold V

SHDN Pin Current (Note 10) V

Quiescent Current in Shutdown V

= 0.5A

LOAD

I

= 1.5A

LOAD

2.5V < V
LT1963A-1.8 VIN = 2.3V, I

2.8V < V
LT1963A-2.5 VIN = 3V, I

3.5V < V
LT1963A-3.3 VIN = 3.8V, I

4.3V < V

2.5V < V

LT1963A-1.8 ΔV
LT1963A-2.5 ΔV
LT1963A-3.3 ΔV
LT1963A (Note 4) ΔV

V
LT1963A-1.8 VIN = 2.8V, ΔI

V
LT1963A-2.5 VIN = 3.5V, ΔI

V
LT1963A-3.3 V

V
LT1963A (Note 4) VIN = 2.5V, ΔI

V
I

= 1mA

LOAD

I

= 1mA

LOAD

I

= 100mA

LOAD

I

= 100mA

LOAD

I

= 500mA

LOAD

I

= 500mA

LOAD

I

= 1.5A

LOAD

I

= 1.5A

LOAD

= 0mA

I

LOAD

I

= 1mA

LOAD

I

= 100mA

LOAD

I

= 500mA

LOAD

I

= 1.5A

LOAD

= 10μF, I

OUT

= Off to On

OUT

V

= On to Off

OUT

= 0V

SHDN

V

= 20V

SHDN

= 6V, V

IN

= 25°C. (Note 3)

A

1.9

= 2.21V, I

IN

= 2.3V to 20V, I

IN

= 3V to 20V, I

IN

= 3.8V to 20V, I

IN

= 2.21V to 20V, I

IN

= 2.5V, ΔI

IN

= 2.5V, ΔI

IN

= 2.8V, ΔI

IN

= 3.5V, ΔI

IN

= 4.3V, ΔI

IN

= 4.3V, ΔI

IN

= 2.5V, ΔI

IN

LOAD

< 20V, 1mA < I

IN

LOAD

< 20V, 1mA < I

IN

= 1mA

LOAD

< 20V, 1mA < I

IN

LOAD

< 20V, 1mA < I

IN

LOAD

< 20V, 1mA < I

IN

LOAD
LOAD

LOAD
LOAD

LOAD
LOAD

LOAD
LOAD

LOAD
LOAD

= 1mA

LOAD

= 1mA

LOAD

LOAD

= 1mA

LOAD

= 1mA

LOAD

= 1mA

LOAD

= 1mA

LOAD

= 1mA

LOAD

= 1mA

LOAD

= 1mA

LOAD

= 1mA to 1.5A
= 1mA to 1.5A

= 1mA to 1.5A
= 1mA to 1.5A

= 1mA to 1.5A
= 1mA to 1.5A

= 1mA to 1.5A
= 1mA to 1.5A

= 1mA to 1.5A
= 1mA to 1.5A

< 1.5A

< 1.5A

< 1.5A

< 1.5A

< 1.5A

l

1.477

l

1.447

1.773

l

1.737

2.462

l

2.412

3.250

l

3.200

1.192

l

1.174

l
l
l
l
l

●

●

●

●

●

2.1 2.5

1.500

1.500

1.800

1.800

2.500

2.500

3.300

3.300

1.210

1.210

2.0

2.5

3.0

3.5

1.5

1.523

1.545

1.827

1.854

2.538

2.575

3.350

3.400

1.228

1.246
6

7

10
10

5

2918mV

21020mV

2.5 15
30

32035mV

2815mV

0.02 0.06

●

0.10

0.10 0.17

●

0.22

0.19 0.27

●

0.35

0.34 0.45

●

●

●

●

●

●

= 1.5A, BW = 10Hz to 100kHz 40 μV

LOAD

●

0.25

●

1.0

1.1

3.8

15
80

0.90

0.75

0.01
3

= 0V 0.01 1 μA

SHDN

0.55

1.5

1.6

5.5
25

120

2V

1

30

mV
mV
mV
mV
mV

mV

mV
mV

mV

mV

mV

mA
mA
mA
mA
mA

RMS

μA
μA

V
V

V
V

V
V

V
V

V
V

V
V

V
V

V
V

V
V

V
V

V

1963afd

5

LT1963A Series

The l denotes specifi cations which apply over the full operating

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifi cations are at T

PARAMETER CONDITIONS MIN TYP MAX UNITS

Ripple Rejection V

Current Limit V

Input Reverse Leakage Current (Note 13) Q, T, S8 Packages V

Reverse Output Current (Note 11) LT1963A-1.5 V

– V

IN

OUT

f

= 120Hz, I

RIPPLE

= 7V, V

IN

V

= V

IN

OUT(NOMINAL)

ST Package V

LT1963A-1.8 V
LT1963A-2.5 V
LT1963A-3.3 V
LT1963A (Note 4) V

= 25°C. (Note 3)

A

= 1.5V (Avg), V

= 0.75A

LOAD

= 0V

OUT

+ 1V, ΔV

= –20V, V

IN

= –20V, V

IN

OUT
OUT
OUT
OUT
OUT

RIPPLE

OUT

= 0.5V

= –0.1V

OUT
OUT

P-P

= 0
= 0

,

= 1.5V, VIN < 1.5V
= 1.8V, VIN < 1.8V
= 2.5V, VIN < 2.5V
= 3.3V, VIN < 3.3V
= 1.21V, VIN < 1.21V

55 63 dB

2A

●

1.6

●

●

600
600
600
600
300

1
2

1200
1200
1200
1200

600

mA
mA

μA
μA
μA
μA
μA

A

Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.

Note 2: Absolute maximum input to output differential voltage can not
be achieved with all combinations of rated IN pin and OUT pin voltages.
With the IN pin at 20V, the OUT pin may not be pulled below 0V. The total
measured voltage from IN to OUT can not exceed ±20V.

Note 3: The LT1963A regulators are tested and specifi ed under pulse load
conditions such that T

≈ TA. The LT1963AE is 100% tested at TA = 25°C.

J

Performance at –40°C and 125°C is assured by design, characterization and
correlation with statistical process controls. The LT1963AI is guaranteed
over the full –40°C to 125°C operating junction temperature range. The
LT1963AMP is 100% tested and guaranteed over the –55°C to 125°C
operating junction temperature range.

Note 4: The LT1963A (adjustable version) is tested and specifi ed for these
conditions with the ADJ pin connected to the OUT pin.

Note 5: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specifi cation will not apply
for all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current, the input voltage
range must be limited.

Note 6: To satisfy requirements for minimum input voltage, the LT1963A
(adjustable version) is tested and specifi ed for these conditions with an
external resistor divider (two 4.12k resistors) for an output voltage of 2.4V.
The external resistor divider will add a 300μA DC load on the output.

Note 7: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specifi ed output current. In dropout, the
output voltage will be equal to: V

Note 8: GND pin current is tested with V

IN

– V

DROPOUT

= V

IN

.

OUT(NOMINAL)

+ 1V and a

current source load. The GND pin current will decrease at higher input
voltages.

Note 9: ADJ pin bias current fl ows into the ADJ pin.
Note 10: SHDN pin current fl ows into the SHDN pin.
Note 11: Reverse output current is tested with the IN pin grounded and the

OUT pin forced to the rated output voltage. This current fl ows into the OUT
pin and out the GND pin.

Note 12: For the LT1963A, LT1963A-1.5 and LT1963A-1.8 dropout voltage
will be limited by the minimum input voltage specifi cation under some
output voltage/load conditions.

Note 13: For the ST package, the input reverse leakage current increases
due to the additional reverse leakage current for the SHDN pin, which is
tied internally to the IN pin.

6

1963afd

TYPICAL PERFORMANCE CHARACTERISTICS

OUTPUT CURRENT (A)

0

DROPOUT VOLTAGE (mV)

500

450

400

350

300

250

200

150

100

50

0

0.4

0.8

1.0

1963A G01

0.2 0.6

1.2

1.4

1.6

TJ = 125°C

TJ = 25°C

OUTPUT CURRENT (A)

GUARANTEED DROPOUT VOLTAGE (mV)

600

500

400

300

200

100

0

0

0.4

0.8

1.0

1963A G02

0.2 0.6

1.2

1.4

1.6

TJ ≤ 125°C

TJ ≤ 25°C

= TEST POINTS

TEMPERATURE (°C)

–50

DROPOUT VOLTAGE (mV)

500

450

400

350

300

250

200

150

100

50

0

0

50

75

1963A G03

–25

25

100

125

IL = 100mA

IL = 1mA

IL = 0.5A

IL = 1.5A

LT1963A Series

Typical Dropout Voltage

Quiescent Current

1.4

1.2

LT1963A-1.5/1.8/-2.5/-3.3

1.0

0.8

0.6

0.4

QUIESCENT CURRENT (mA)

VIN = 6V

0.2

R

= ∞, IL = 0

L

= V

V

SHDN

0

–50

IN

–25 0

TEMPERATURE (°C)

LT1963A

50 100 125

25 75

1963A G04

Guaranteed Dropout Voltage

LT1963A-1.5 Output Voltage

1.54
IL = 1mA

1.53

1.52

1.51

1.50

1.49

OUTPUT VOLTAGE (V)

1.48

1.47

1.46

–25 0 50

–50

25

TEMPERATURE (°C)

75 100 125

1963A G40

Dropout Voltage

LT1963A-1.8 Output Voltage

1.84
IL = 1mA

1.83

1.82

1.81

1.80

1.79

OUTPUT VOLTAGE (V)

1.78

1.77

1.76

–25 25 75 125

–50

050

TEMPERATURE (°C)

100

1963A G05

LT1963A-2.5 Output Voltage

2.58

2.56

2.54

2.52

OUTPUT VOLTAGE (V)

2.50

2.48

2.46

2.44

2.42
–50

IL = 1mA

–25 25 75 125

050

TEMPERATURE (°C)

100

1963A G06

LT1963A-3.3 Output Voltage

3.38
IL = 1mA

3.36

3.34

3.32

3.30

3.28

OUTPUT VOLTAGE (V)

3.26

3.24

3.22

–25 25 75 125

–50

050

TEMPERATURE (°C)

100

1963A G07

LT1963A ADJ Pin Voltage

1.230
IL = 1mA

1.225

1.220

1.215

1.210

1.205

ADJ PIN VOLTAGE (V)

1.200

1.195

1.190

–25 25 75 125

–50

050

TEMPERATURE (°C)

100

1963A G08

1963afd

7

LT1963A Series

INPUT VOLTAGE (V)

0

QUIESCENT CURRENT (mA)

14

12

10

8

6

4

2

0

1963A G09

2

5678910

1

34

TJ = 25°C
R

L

= ∞

V

SHDN

= V

IN

INPUT VOLTAGE (V)

0

QUIESCENT CURRENT (mA)

14

12

10

8

6

4

2

0

1963A G10

2

1056789

1

34

TJ = 25°C
R

L

= ∞

V

SHDN

= V

IN

INPUT VOLTAGE (V)

0

0

QUIESCENT CURRENT (mA)

2

6

8

10

14

1

5

7

1963A G41

4

12

4

9

10

2

3

68

TJ = 25°C
R

L

= ∞

V

SHDN

= V

IN

INPUT VOLTAGE (V)

0

QUIESCENT CURRENT (mA)

14

12

10

8

6

4

2

0

1963A G11

2

1056789

1

34

TJ = 25°C
R

L

= ∞

V

SHDN

= V

IN

INPUT VOLTAGE (V)

0

QUIESCENT CURRENT (mA)

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

1963A G12

4

2010 12 14 16 18

2

68

TJ = 25°C
R

L

= 4.3k

V

SHDN

= V

IN

TYPICAL PERFORMANCE CHARACTERISTICS

LT1963A-1.5 Quiescent Current

LT1963A-3.3 Quiescent Current

LT1963A-1.8 Quiescent Current

LT1963A Quiescent Current

LT1963A-2.5 Quiescent Current

LT1963A-1.5 GND Pin Current

25

TJ = 25°C

= V

V

SHDN

IN

*FOR V

20

15

10

= 1.5V

OUT

RL = 150, IL = 10mA*

RL = 5, IL = 300mA*

LT1963A-1.8 GND Pin Current

25

TJ = 25°C
V

SHDN

*FOR V

20

15

10

GND PIN CURRENT (mA)

5

0

0

8

= V

IN

= 1.8V

OUT

RL = 6, IL = 300mA*

RL = 18, IL = 100mA*

RL = 180, IL = 10mA*

1

3

4

2

INPUT VOLTAGE (V)

GND PIN CURRENT (mA)

5

0

123

0

LT1963A-2.5 GND Pin Current

25

20

15

10

1098765

1963A G13

GND PIN CURRENT (mA)

5

0

0

RL = 8.33, IL = 300mA*

RL = 25, IL = 100mA*

RL = 250, IL = 10mA*

1

3

2

INPUT VOLTAGE (V)

TJ = 25°C

= V

V

SHDN

IN

*FOR V

4

OUT

= 2.5V

1098765

1963A G14

LT1963A-3.3 GND Pin Current

25

20

15

10

GND PIN CURRENT (mA)

5

0

1

0

2

RL = 15, IL = 100mA*

67 9

45

INPUT VOLTAGE (V)

TJ = 25°C
V

= V

SHDN

*FOR V

RL = 11, IL = 300mA*

RL = 33, IL = 100mA*

RL = 330, IL = 100mA*

3

4

INPUT VOLTAGE (V)

OUT

8

IN

= 3.3V

10

1963A G42

1098765

1963A G15

1963afd

TYPICAL PERFORMANCE CHARACTERISTICS

INPUT VOLTAGE (V)

100

90

80

70

60

50

40

30

20

10

0

GND PIN CURRENT (mA)

1963A G17

0123

4

5

678910

RL = 1.8, IL = 1A*

RL = 1.2, IL = 1.5A*

RL = 3.6, IL = 500mA*

TJ = 25°C
V

SHDN

= V

IN

*FOR V

OUT

= 1.8V

INPUT VOLTAGE (V)

100

90

80

70

60

50

40

30

20

10

0

GND PIN CURRENT (mA)

1963A G18

0123

4

5

678910

RL = 2.5, IL = 1A*

RL = 1.67, IL = 1.5A*

RL = 5, IL = 500mA*

TJ = 25°C
V

SHDN

= V

IN

*FOR V

OUT

= 2.5V

INPUT VOLTAGE (V)

100

90

80

70

60

50

40

30

20

10

0

GND PIN CURRENT (mA)

1963A G19

0123

4

5

678910

RL = 3.3, IL = 1A*

RL = 2.2, IL = 1.5A*

RL = 6.6, IL = 500mA*

TJ = 25°C
V

SHDN

= V

IN

*FOR V

OUT

= 3.3V

INPUT VOLTAGE (V)

100

90

80

70

60

50

40

30

20

10

0

GND PIN CURRENT (mA)

1963A G20

0123

4

5

678910

RL = 1.21, IL = 1A*

RL = 0.81, IL = 1.5A*

RL = 2.42, IL = 500mA*

TJ = 25°C
V

SHDN

= V

IN

*FOR V

OUT

= 1.21V

OUTPUT CURRENT (A)

100

90

80

70

60

50

40

30

20

10

0

GND PIN CURRENT (mA)

1963A G21

0 0.2 0.4 0.6

0.8

1.0

1.2 1.4 1.6

VIN=V

OUT (NOMINAL)

+1V

TEMPERATURE (°C)

–50

SHDN PIN THRESHOLD (V)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

0

50

75

1963A G23

–25

25

100

125

IL = 1mA

IL = 1.5A

TEMPERATURE (°C)

–50

SHDN PIN THRESHOLD (V)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

0

50

75

1963A G22

–25

25

100

125

IL = 1mA

LT1963A Series

LT1963A GND Pin Current

10

8

6

4

GND PIN CURRENT (mA)

2

0

0

RL = 4.33, IL = 300mA*

RL = 12.1, IL = 100mA*

RL = 121, IL = 10mA*

1

3

2

INPUT VOLTAGE (V)

TJ = 25°C
V

*FOR V

4

LT1963A-2.5 GND Pin Current

SHDN

= V

OUT

IN

= 1.21V

1963A G16

100

GND PIN CURRENT (mA)

1098765

90

80

70

60

50

40

30

20

10

0

0

RL = 1, IL = 1.5A*

21

INPUT VOLTAGE (V)

TJ = 25°C
V

SHDN

*FOR V

RL = 1.5, IL = 1A*

RL = 3, IL = 500mA*

67 9

43

5

LT1963A-3.3 GND Pin Current

= V

OUT

IN

= 1.5V

8

LT1963A-1.8 GND Pin CurrentLT1963A-1.5 GND Pin Current

10

1963A G43

LT1963A GND Pin Current

GND Pin Current vs I

LOAD

SHDN Pin Threshold (On-to-Off)

SHDN Pin Threshold (Off-to-On)

1963afd

9