LTC3865EUH Linear Technology Corporation, LTC3865EUH Datasheet

LTC3865EUH

Manufacturer Part Number

LTC3865EUH

Description

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC3865IUH.pdf (36 pages)

Specifications of LTC3865EUH

Case

QFN32

Date_code

08+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3865EUH

Manufacturer:

Quantity:

10 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC3865EUH

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC3865EUH#PBF

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3865EUH-1

Manufacturer:

Quantity:

10 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC3865EUH-1

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC3865EUH-1#PBF

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Current page: 1 of 36
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applicaTions

L, LT, LTC, LTM, Burst Mode, OPTI-LOOP , µModule, Linear Technology and the Linear logo

are registered trademarks and No R

other trademarks are the property of their respective owners. U.S. Patents, including 5481178,

5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258.

Typical applicaTion

FeaTures

OUT1

1.5V

15A

Dual, 180° Phased Controllers

2-Pin VID Output Voltage Programming from 0.6V

to 5V

High Efficiency: Up to 95%

Phase-Lockable Fixed Frequency 250kHz to 770kHz

Adjustable Current Limit

Dual N-Channel MOSFET Synchronous Drive

Wide V

Adjustable Soft-Start Current Ramping or Tracking

Output OV Protection With Reverse Current Limit

Power Good Output Voltage Monitor

32-Pin 5mm × 5mm QFN and 38-Lead TSSOP

Packages

DC Power Distribution Systems

SENSE

2mΩ

0.47µH

100µF

or DCR Current Sensing

Range: 4.5V to 38V Operation

OUT2,3

High Efficiency 1.5V/15A, 1.2V/15A Step-Down Converter

10k

4.7µF

SENSE

1000pF

100Ω

1000pF

100Ω

0.1µF

is a trademark of Linear Technology Corporation. All

100pF

TG1

BOOST1

SW1

BG1

SENSE1

VID11

VID12

TH1

TK/SS1

OSENSE1

2.2Ω

0.1µF

–

LTC3865

1µF

SGND

0.1µF

SENSE2

BOOST2

OSENSE2

TK/SS2

INTV

VID21

VID22

PGND

FREQ

SW2

BG2

TG2

TH2

–

162k

0.1µF

1000pF

100Ω

15k

Dual, 2-Phase Synchronous

DescripTion

The LTC

synchronous step-down DC/DC switching regulator

controllers that drive all N-channel synchronous power

MOSFET stages. A constant frequency current mode

architecture allows a phase-lockable frequency of up to

770kHz. Power loss and noise are minimized by operating

the two controller output stages out of phase.

OPTI-LOOP

to be optimized over a wide range of output capacitance

and ESR values. Independent track/soft-start pins for

each controller ramp the output voltage during start-up.

Current foldback limits MOSFET heat dissipation during

short-circuit conditions. The MODE/PLLIN pin selects

among Burst Mode

and continuous inductor current mode. The output volt-

ages can be precisely programmed by pin strapping or

external resistors.

The LTC3865/LTC3865-1 are available in low profile (5mm

× 5mm) 32-pin QFN and 38-Lead thermally enhanced

TSSOP packages.

1000pF

100pF

Pin Selectable Outputs

DC/DC Controller with

0.47µH

3865/LTC3865-1 are high performance dual

22µF

50V

3865 TA01a

OUT5,6

compensation allows the transient response

4.5V TO 24V

LTC3865/LTC3865-1

2mΩ

100µF

1.2V

15A

OUT2

operation, pulse-skipping mode,

100

0.01

Efficiency and Power Loss

OUT

= 12V

= 1.5V

0.1

vs Load Current

EFFICIENCY

LOAD CURRENT (A)

POWER LOSS

3865 TA01b

100

0.1

0.01

3865f

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