LT1764ET-3.3#TR datasheet, PDF

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LT1764ET-3.3#TR: DescriptionIC VREG 3.3 V FIXED POSITIVE LDO REGULATOR, 0.66 V DROPOUT, PZFM5, PLASTIC, TO-220, 5 PIN, Fixed Positive Single Output LDO Regulator; CategoryPower/power management The power supply circuit; File Size287KB，20 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LT1764ET-3.3#TR Overview

IC VREG 3.3 V FIXED POSITIVE LDO REGULATOR, 0.66 V DROPOUT, PZFM5, PLASTIC, TO-220, 5 PIN, Fixed Positive Single Output LDO Regulator

LT1764ET-3.3#TR Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Linear ( ADI )
Parts packaging code	SFM
package instruction	PLASTIC, TO-220, 5 PIN
Contacts	3
Reach Compliance Code	not_compliant
ECCN code	EAR99
Adjustability	FIXED
Maximum drop-back voltage 1	0.66 V
Nominal dropback voltage 1	0.34 V
Maximum absolute input voltage	20 V
Maximum input voltage	20 V
Minimum input voltage	2.7 V
JESD-30 code	R-PZFM-T5
JESD-609 code	e0
Maximum grid adjustment rate	0.01%
Maximum load regulation	0.04%
Number of functions	1
Output times	1
Number of terminals	5
Working temperatureTJ-Max	125 °C
Working temperature TJ-Min	-40 °C
Maximum output current 1	3 A
Maximum output voltage 1	3.4 V
Minimum output voltage 1	3.183 V
Nominal output voltage 1	3.3 V
Package body material	PLASTIC/EPOXY
encapsulated code	ZIP
Encapsulate equivalent code	ZIP5,.15,.2,67TB
Package shape	RECTANGULAR
Package form	FLANGE MOUNT
method of packing	TAPE AND REEL
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Certification status	Not Qualified
Regulator type	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
surface mount	NO
technology	BIPOLAR
Terminal surface	Tin/Lead (Sn/Pb) - with Nickel (Ni) barrier
Terminal form	THROUGH-HOLE
Terminal pitch	1.7 mm
Terminal location	ZIG-ZAG
Maximum time at peak reflow temperature	NOT SPECIFIED
Maximum voltage tolerance	3.5%

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LT1764 Series

3A, Fast Transient

Response, Low Noise,

LDO Regulators

FEATURES

■

DESCRIPTIO

Optimized for Fast Transient Response

Output Current: 3A

Dropout Voltage: 340mV at 3A

Low Noise: 40

RMS

(10Hz to 100kHz)

1mA Quiescent Current

Wide Input Voltage Range: 2.7V to 20V

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

< 1µA Quiescent Current in Shutdown

Stable with 10µF Output Capacitor

Reverse Battery Protection

No Reverse Current

Thermal Limiting

Available in 5-Lead TO-220, DD and 16-Lead

TSSOP Packages

APPLICATIO S

■

The LT

1764 is a low dropout regulator optimized for fast

transient response. The device is capable of supplying 3A

of output current with a dropout voltage of 340mV. Oper-

ating 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 LT1764 has very

low output voltage noise which makes the device ideal for

sensitive RF supply applications.

Output voltage range is from 1.21V to 20V. The LT1764

regulators are stable with output capacitors as low as 10µF.

Internal protection circuitry includes reverse battery pro-

tection, current limiting, thermal limiting and reverse cur-

rent protection. The device is 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 LT1764 regu-

lators are available in 5-lead TO-220, DD and Exposed Pad

16-lead TSSOP packages.

, 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 6144250, 6118263.

3.3V to 2.5V Logic Power Supply

Post Regulator for Switching Supplies

TYPICAL APPLICATIO

400

3.3V

to 2.5V

OUT

Regulator

DROPOUT VOLTAGE (mV)

350

300

250

200

150

100

0.5

1.0

1.5

2.0

LOAD CURRENT (A)

2.5

3.0

1764 TA02

> 3V

10µF

OUT

LT1764-2.5

10µF

2.5V

SHDN SENSE

GND

1764 TA01

Dropout Voltage

1764fb

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