LT1764-3.3 Datasheet

IC型號：
LT1764-3.3
PDF描述：
3A, Fast Transient Response, Low Noise,LDO Regulators
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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

碌

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

< 1碌A(chǔ) Quiescent Current in Shutdown

Stable with 10碌F Output Capacitor

Reverse Battery Protection

No Reverse Current

Thermal Limiting

APPLICATIO S

The LT

廬

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 < 1碌A(chǔ) 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 10碌F.

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 and DD packages.

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

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

10碌F

OUT

LT1764-2.5

10碌F

2.5V

SHDN SENSE

GND

1764 TA01

Dropout Voltage

1764fa

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