LTC3633EUFD Linear Technology Corporation, LTC3633EUFD Datasheet

LTC3633EUFD

Manufacturer Part Number

LTC3633EUFD

Description

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC3633IUFD.pdf (28 pages)

Specifications of LTC3633EUFD

Case

QFN

Date_code

10+

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Part Number

Manufacturer

Quantity

Price

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Part Number:

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Manufacturer:

Quantity:

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Manufacturer:

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Part Number:

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3633EUFD#PBF

Manufacturer:

Quantity:

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC3633EUFD#PBF

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LTC3633EUFD#TRPBF

Manufacturer:

Quantity:

3 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

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Manufacturer:

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APPLICATIONS

TYPICAL APPLICATION

FEATURES

3.6V TO 15V

5V AT 3A

3.6V to 15V Input Voltage Range

3A Output Current per Channel

Up to 95% Efﬁ ciency

Low Duty Cycle Operation: 5% at 2.25MHz

Selectable 0°/180° Phase Shift Between Channels

Adjustable Switching Frequency: 500kHz to 4MHz

External Frequency Synchronization

Current Mode Operation for Excellent Line and

Load Transient Response

0.6V Reference Allows Low Output Voltages

User Selectable Burst Mode

Continuous Operation

Output Voltage Tracking and Soft-Start Capability

Short-Circuit Protected

Overvoltage Input and Overtemperature Protection

Low Power 2.5V Linear Regulator Output

Power Good Status Outputs

Available in (4mm × 5mm) QFN-28 and 28-Lead

TSSOP Packages

Distributed Power Systems

Battery Powered Instruments

Point of Load Power Supplies

OUT2

47μF

22μF

1.5μH

73.2k

0.1μF

10k

RUN1

RUN2

TRACKSS2

PGOOD2

BOOST2

SW2

ON2

FB2

SGND

Operation or Forced

IN2

LTC3633

PGND

MODE/SYNC

IN1

TRACKSS1

PHMODE

PGOOD1

BOOST1

INTV

V2P5

ITH1

ITH2

SW1

ON1

FB1

10k

0.1μF

45.3k

2.2μF

1μH

DESCRIPTION

The LTC

synchronous buck regulator using a controlled on-time,

current mode architecture, with phase lockable switching

frequency. The two channels can run 180° out of phase,

which relaxes the requirements for input and output ca-

pacitance. The operating supply voltage range is from 3.6V

to 15V, making it suitable for dual cell lithium-ion batteries

as well as point of load power supply applications from

a 12V or 5V supply.

The operating frequency is programmable and synchroniz-

able from 500kHz to 4MHz with an external resistor. The

high frequency capability allows the use of small surface

mount inductors and capacitors. The unique constant

frequency/controlled on-time architecture is ideal for

high step-down ratio applications that operate at high

frequency while demanding fast transient response. An

internal phase lock loop servos the on-time of the internal

one-shot timer to match the frequency of the internal clock

or an applied external clock.

The LTC3633 can select between forced continuous mode

and high efﬁ ciency Burst Mode operation.

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

of Linear Technology Corporation. All other trademarks are the property of their respective

owners. Protected by U.S. Patents including 5481178, 5847554, 6580258, 6304066, 6476589,

6774611.

22μF

Monolithic Synchronous

3.3V AT 3A

OUT1

3633 is a high efﬁ ciency, dual-channel monolithic

3633 TA01a

Dual Channel 3A, 15V

Step-Down Regulator

100

Efﬁ ciency vs Load Current

Burst Mode

OPERATION

= 12V

LOAD CURRENT (mA)

100

LTC3633

1000

OUT

= 5V

= 3.3V

3633 TA01b

10000

3633f

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