LTC1844ES5-3.3 Linear Technology Corporation, LTC1844ES5-3.3 Datasheet

LTC1844ES5-3.3

Manufacturer Part Number

LTC1844ES5-3.3

Description

Manufacturer

Linear Technology Corporation

Datasheets

1.LTC1844ES5-SD-TRPBF.pdf (12 pages)

2.LTC1844ES5-SD.pdf (12 pages)

3.LTC1844ES5-SD.pdf (12 pages)

Specifications of LTC1844ES5-3.3

Date_code

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Part Number:

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Part Number:

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LTC1844ES5-3.3#TRMPBF

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LT/凌特

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Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC1844ES5-3.3#TRPB

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Part Number:

LTC1844ES5-3.3#TRPBF

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FEATURES

TYPICAL APPLICATIO

APPLICATIO S

Bluetooth/802.11 Cards

PDAs and Notebook Computers

Portable Instruments and Battery-Powered Systems

Cellular Phones

Very Low Dropout:

90mV at 150mA

30mV at 50mA (LTC1844-3.3)

Wide Input Voltage Range: 1.6V to 6.5V

Low 35 A Supply Current, Even in Dropout

Low Noise: 30 V

Voltage and Current Ranges

Fast Transient Response

10nA Supply Current in Shutdown

Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 2.8V, 3.3V

Adjustable Output Voltage: 1.25V to 6V

Output Current Limit

Reverse-Battery and Reverse-Current Protection

No Protection Diodes Needed

Stable with 1 F Output Capacitor

Stable with Ceramic Capacitors

Short-Circuit and Thermal Overload Protection

Low Profile (1mm) SOT-23 Package

1.75% Voltage Accuracy Over Temperature,

Fixed Voltage Low Noise, VLDO Linear Regulator

3.3V TO 6.5V

OFF ON

1 F

RMS

SHDN

(10Hz to 100kHz)

LTC1844-3.3

GND

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 represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

OUT

BYP

1844 TA01

1 F

0.1 F

3.3V

OUT

DESCRIPTIO

The LTC

dropout) linear regulators designed for low power/portable

applications. These regulators can operate from input

voltages as low as 1.6V. Typical output noise is only

30 V

90mV at the maximum load current of 150mA, reducing to

30mV at 50mA.

The internal P-channel MOSFET pass transistor requires

no base current, allowing the device to draw only 35 A

during normal operation, independent of the dropout

voltage and load current. The quiescent current falls to a

negligible 10nA during shutdown.

Other features include high output voltage accuracy,

excellent transient response, stablity with ultralow ESR

ceramic capacitors as small as 1 F, reverse-battery and

reverse-current protection, short-circuit and thermal

overload protection and output current limiting.

The LTC1844 regulators are available in a low profile

(1mm) SOT-23 (ThinSOT

VLDO and ThinSOT are trademarks of Linear Technology Corporation.

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

RMS

LTC1844-3.3 Dropout Voltage vs Load Current

1844 Series are low noise VLDO

and typical dropout for the LTC1844-3.3 is just

120

100

150mA, Micropower,

Low Noise, VLDO

Linear Regulator

Final Electrical Specifications

OUT

) package.

(mA)

LTC1844 Series

100

125

1844 TA02

150

May 2003

(very low

1844ia

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