LTC3026EMSE-1#PBF Linear Technology, LTC3026EMSE-1#PBF Datasheet

LTC3026EMSE-1#PBF

Manufacturer Part Number

LTC3026EMSE-1#PBF

Description

1.5a vldo in dfn... ic reg ldo adj 1.5a...

Manufacturer

Linear Technology

Datasheet

1.LTC3026EMSE-1PBF.pdf (18 pages)

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FeaTures

applicaTions

L, 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

= 1.5V

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

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

Low Operating Current: I

Low Shutdown Current:

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

High Efficiency Linear Regulator

Post Regulator for Switching Supplies

Microprocessor Supply

< 1µA (Typ), I

1.2V Output Voltage from 1.5V Input Supply

OFF ON

10µH

4.7µF

L1: MURATA LQH2MCN100K02

GND

SHDN

BST

0.4V

= 0.1µA (Typ)

CONVERTER

–

LTC3026

5V BOOST

= 950µA at V

BST

OUT

ADJ

OUT

100k

= 1.5A

and V

4.7µF

8.06k

4.02k

= 1.5V

BST

10µF

OUT

1.5A

OUT

3026 TA01a

= 1.2V,

DescripTion

The LTC

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 sup-

plied 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.

1.5A Low Input Voltage

VLDO Linear Regulator

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

150

100

Dropout Voltage vs Output Current

0.5

OUT

1.2V

1.5V

2.0V

2.6V

(A)

1.0

3026 TA01b

LTC3026

1.5

3026ff

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