LTC3026EMSETR datasheet, PDF - EEWORLD Datasheet

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LTC3026EMSETR: Description1.5A Low Input Voltage VLDO Linear Regulator; File Size2MB，18 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC3026EMSETR Overview

1.5A Low Input Voltage VLDO Linear Regulator

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LTC3026

1.5A Low Input Voltage

VLDO Linear Regulator

FeaTures

DescripTion

The LTC

3026 is a very low dropout (VLDO™) linear regula-

tor that can operate at input voltages down to 1.14V. The

device is capable of supplying 1.5A of output current with

a typical dropout voltage of only 100mV. To allow opera-

tion at low input voltages the LTC3026 includes a boost

converter that provides the necessary headroom for the

internal LDO circuitry.

Output current comes directly from the input supply to

maximize efficiency. The boost converter requires only a

small chip inductor and ceramic capacitor for operation.

Additionally, the boosted output voltage of one LTC3026

can supply the boost voltage for other LTC3026s, thus

requiring a single inductor for multiple LDOs. A user

supplied boost voltage can be used eliminating the need

for an inductor altogether.

The LTC3026 regulator is stable with 10µF or greater

ceramic output capacitors. The device has a low 0.4V

reference voltage which is used to program the output

voltage via two external resistors. The device also has

internal current limit, overtemperature shutdown, and

reverse output current protection. The LTC3026 is avail-

able in a small 10-lead MSOP or low profile (0.75mm)

10-lead 3mm

3mm DFN package.

Input Voltage Range:

1.14V to 3.5V (with Boost Enabled)

1.14V to 5.5V (with External 5V Boost)

Low Dropout Voltage: 100mV at I

OUT

= 1.5A

Adjustable Output Range: 0.4V to 2.6V

Output Current: Up to 1.5A

Excellent Supply Rejection Even Near Dropout

Shutdown Disconnects Load from V

and V

BST

Low Operating Current: I

= 950µA at V

= 1.5V

Low Shutdown Current:

< 1µA (Typ), I

BST

= 0.1µA (Typ)

Stable with 10µF or Greater Ceramic Capacitors

Short-Circuit, Reverse Current Protected

Overtemperature Protected

Available in 10-Lead MSOP and 10-Lead

(3mm

3mm) DFN Packages

applicaTions

High Efficiency Linear Regulator

Post Regulator for Switching Supplies

Microprocessor Supply

LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks

and ThinSOT, VLDO are trademarks of Linear Technology Corporation. All other trademarks are

the property of their respective owners.

Typical applicaTion

1.2V Output Voltage from 1.5V Input Supply

150

10µH

5V BOOST BST

CONVERTER

4.7µF

0.4V

Dropout Voltage vs Output Current

4.7µF

DROPOUT (mV)

100

= 1.5V

–

1.2V

1.5V

2.0V

2.6V

OUT

8.06k

OUT

= 1.2V,

1.5A

OUT

10µF

OFF ON

SHDN

LTC3026

GND

ADJ

100k

4.02k

3026 TA01a

0.5

OUT

(A)

1.0

1.5

3026 TA01b

L1: MURATA LQH2MCN100K02

3026fd

LTC3026EMSETR Related Products

	LTC3026EMSETR	LTC3026EDDPBF	LTC3026EDDTR	LTC3026EMSEPBF	LTC3026EMSETRPBF	LTC3026_1
Description	1.5A Low Input Voltage VLDO Linear Regulator	1.5A Low Input Voltage VLDO Linear Regulator	1.5A Low Input Voltage VLDO Linear Regulator	1.5A Low Input Voltage VLDO Linear Regulator	1.5A Low Input Voltage VLDO Linear Regulator	1.5A Low Input Voltage VLDO Linear Regulator

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