Name: LT1963AEST-2.5
SKU: LT1963AEST-2.5
Price: 1.75670 USD
Availability: OutOfStock

LT1963A Series

1963af

TYPICAL APPLICATION

APPLICATIO S

FEATURES

DESCRIPTIO

1.5A, Low Noise,

Fast Transient Response

LDO Regulators

■

Optimized for Fast Transient Response

■

Output Current: 1.5A

■

Dropout Voltage: 340mV

■

Low Noise: 40

RMS

(10Hz to 100kHz)

■

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

■

<1mA Quiescent Current in Shutdown

■

Stable with 10mF Output Capacitor

■

Stable with Ceramic Capacitors

■

Reverse Battery Protection

■

No Reverse Current

■

Thermal Limiting

The LT

1963A series are low dropout regulators opti-

mized 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 < 1mA 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

10mF. Small ceramic capacitors can be used without the

necessary addition of ESR as is common with other

regulators. 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

LT1963A regulators are available in 5-lead TO-220, DD,

3-lead SOT-223 and 8-lead SO packages.

3.3V to 2.5V Regulator

■

3.3V to 2.5V Logic Power Supplies

■

Post Regulator for Switching Supplies

, LTC and LT are registered trademarks of Linear Technology Corporation.

SHDN

10µF*

*TANTALUM,

CERAMIC OR

ALUMINUM ELECTROLYTIC

1963 TA01

OUT

> 3V

SENSE

GND

LT1963A-2.5

2.5V

1.5A

10µF*

OUTPUT CURRENT (A)

DROPOUT VOLTAGE (mV)

200

300

1.6

1963 TA02

100

0.4

0.8

1.2

0.2

0.6

1.0

1.4

400

150

250

350

Dropout Voltage

LT1963A Series

1963af

(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......................... Indefinite

Operating Junction Temperature Range –45∞C to 125∞C

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

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

ABSOLUTE AXI U RATI GS

WWWU

ORDER PART

NUMBER

LT1963AEQ

LT1963AEQ-1.5

LT1963AEQ-1.8

LT1963AEQ-2.5

LT1963AEQ-3.3

JMAX

= 150∞C, q

= 30∞C/W

*PIN 5 = SENSE FOR LT1963A-1.8/LT1963A-2.5/LT1963A-3.3

= ADJ FOR LT1963A

ORDER PART

NUMBER

LT1963AET

LT1963AET-1.5

LT1963AET-1.8

LT1963AET-2.5

LT1963AET-3.3

*PIN 5 = SENSE FOR LT1963A-1.8/LT1963A-2.5/LT1963A-3.3

= ADJ FOR LT1963A

JMAX

= 150∞C, q

= 50∞C/W

Q PACKAGE

5-LEAD PLASTIC DD

TAB IS

GND

FRONT VIEW

SENSE/ADJ*

OUT

GND

SHDN

T PACKAGE

5-LEAD PLASTIC TO-220

SENSE/ADJ*

OUT

GND

SHDN

FRONT VIEW

TAB IS

GND

FRONT VIEW

TAB IS

GND

OUT

GND

ST PACKAGE

3-LEAD PLASTIC SOT-223

JMAX

= 150∞C, q

= 50∞C/W

LT1963AEST-1.5

LT1963AEST-1.8

LT1963AEST-2.5

LT1963AEST-3.3

ORDER PART

NUMBER

LT1963AES8

LT1963AES8-1.5

LT1963AES8-1.8

LT1963AES8-2.5

LT1963AES8-3.3

ORDER PART

NUMBER

TOP VIEW

GND

SHDN

OUT

SENSE/ADJ*

GND

S8 PACKAGE

8-LEAD PLASTIC SO

*PIN 2 = SENSE FOR LT1963A-1.8/LT1963A-2.5/LT1963A-3.3

= ADJ FOR LT1963A

JMAX

= 150∞C, q

= 70∞C/W

PACKAGE/ORDER I FOR ATIO

ST PART

MARKING

1963A

963A15

963A18

963A25

963A33

S8 PART

MARKING

963A15

963A18

963A25

963A33

Consult LTC Marketing for parts specified with wider operating temperature ranges.

LT1963A Series

1963af

PARAMETER CONDITIONS MIN TYP MAX UNITS

Minimum Input Voltage (Notes 4,12) I

LOAD

= 0.5A 1.9 V

LOAD

= 1.5A ● 2.1 2.5 V

Regulated Output Voltage (Note 5) LT1963A-1.5 V

= 2.21V, I

LOAD

= 1mA 1.477 1.500 1.523 V

2.5V < V

< 20V, 1mA < I

LOAD

< 1.5A ● 1.447 1.500 1.545 V

LT1963A-1.8 V

= 2.3V, I

LOAD

= 1mA 1.773 1.800 1.827 V

2.8V < V

< 20V, 1mA < I

LOAD

< 1.5A ● 1.737 1.800 1.854 V

LT1963A-2.5 V

= 3V, I

LOAD

= 1mA 2.462 2.500 2.538 V

3.5V < V

< 20V, 1mA < I

LOAD

< 1.5A ● 2.412 2.500 2.575 V

LT1963A-3.3 V

= 3.8V, I

LOAD

= 1mA 3.250 3.300 3.350 V

4.3V < V

< 20V, 1mA < I

LOAD

< 1.5A ● 3.200 3.300 3.400 V

ADJ Pin Voltage LT1963A V

= 2.21V, I

LOAD

= 1mA 1.192 1.210 1.228 V

(Notes 4, 5) 2.5V < V

< 20V, 1mA < I

LOAD

< 1.5A ● 1.174 1.210 1.246 V

Line Regulation LT1963A-1.5 DV

= 2.21V to 20V, I

LOAD

= 1mA ● 2.0 6 mV

LT1963A-1.8 DV

= 2.3V to 20V, I

LOAD

= 1mA ● 2.5 7 mV

LT1963A-2.5 DV

= 3V to 20V, I

LOAD

= 1mA ● 3.0 10 mV

LT1963A-3.3 DV

= 3.8V to 20V, I

LOAD

= 1mA ● 3.5 10 mV

LT1963A (Note 4) DV

= 2.21V to 20V, I

LOAD

= 1mA ● 1.5 5 mV

Load Regulation LT1963A-1.5 V

= 2.5V, DI

LOAD

= 1mA to 1.5A 2 9 mV

= 2.5V, DI

LOAD

= 1mA to 1.5A ● 18 mV

LT1963A-1.8 V

= 2.8V, DI

LOAD

= 1mA to 1.5A 2 10 mV

= 2.8V, DI

LOAD

= 1mA to 1.5A ● 20 mV

LT1963A-2.5 V

= 3.5V, DI

LOAD

= 1mA to 1.5A 2.5 15 mV

= 3.5V, DI

LOAD

= 1mA to 1.5A ● 30 mV

LT1963A-3.3 V

= 4.3V, DI

LOAD

= 1mA to 1.5A 3 20 mV

= 4.3V, DI

LOAD

= 1mA to 1.5A ● 35 mV

LT1963A (Note 4) V

= 2.5V, DI

LOAD

= 1mA to 1.5A 2 8 mV

= 2.5V, DI

LOAD

= 1mA to 1.5A ● 15 mV

Dropout Voltage I

LOAD

= 1mA 0.02 0.06 V

= V

OUT(NOMINAL)

LOAD

= 1mA ● 0.10 V

(Notes 6, 7, 12)

LOAD

= 100mA 0.10 0.17 V

LOAD

= 100mA ● 0.22 V

LOAD

= 500mA 0.19 0.27 V

LOAD

= 500mA ● 0.35 V

LOAD

= 1.5A 0.34 0.45 V

LOAD

= 1.5A ● 0.55 V

GND Pin Current I

LOAD

= 0mA ● 1.0 1.5 mA

= V

OUT(NOMINAL)

+ 1V I

LOAD

= 1mA ● 1.1 1.6 mA

(Notes 6, 8)

LOAD

= 100mA ● 3.8 5.5 mA

LOAD

= 500mA ● 15 25 mA

LOAD

= 1.5A ● 80 120 mA

Output Voltage Noise C

OUT

= 10mF, I

LOAD

= 1.5A, BW = 10Hz to 100kHz 40 mV

RMS

ADJ Pin Bias Current (Notes 4, 9) 3 10 mA

Shutdown Threshold V

OUT

= Off to On ● 0.90 2 V

OUT

= On to Off ● 0.25 0.75 V

SHDN Pin Current V

SHDN

= 0V 0.01 1 mA

(Note 10) V

SHDN

= 20V 3 30 mA

Quiescent Current in Shutdown V

= 6V, V

SHDN

= 0V 0.01 1 mA

Ripple Rejection V

– V

OUT

= 1.5V (Avg), V

RIPPLE

= 0.5V

P-P

,5563dB

RIPPLE

= 120Hz, I

LOAD

= 0.75A

Current Limit V

= 7V, V

OUT

= 0V 2 A

= V

OUT(NOMINAL)

+ 1V, DV

OUT

= –0.1V ● 1.6 A

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T

= 25∞C. (Note 2)

ELECTRICAL CHARACTERISTICS

Part #	LT1963AEST-2.5
Description	IC REG LDO 2.5V 1.5A SOT223
Category	RECTIFIER
Availability	Out of Stock
Qty	0

LT1963AEST-2.5

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Technical Document