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Professional supply Integrated circuit IC LTC7149EUFD PBF Buck Switching Regulator IC Negative Adjustable 0V 1 Output 4A 28WFQFN

Manufacturer
ADI
Manufacturer Product Number
LTC7149EUFD#PBF
Description

Conv DC-DC 3.4V to 60V Synchronous Step Down Single-Out 0V to -28V 4A 28-Pin QFN EP Tube

Package Condition
TUBE
Datasheet

Product Descriptions

The LTC®7149 is a high efficiency 60V, 4A synchronous monolithic step-down regulator for inverting output applications. The regulator features a single resistorprogrammable output voltage and high efficiency over a wide VOUT range.

The inverting regulator operates from an input voltage range of 3.4V to 60V and provides an adjustable output from (–28V) to zero volts while delivering up to 4A of inductor current. The switching frequency is also set with an external resistor. A user-selectable mode input is provided to allow the user to trade off ripple noise for efficiency at light loads; Burst Mode operation provides the highest efficiency at light loads, while forced continuous mode provides low output ripple. The MODE/SYNC pin can also be used to synchronize the switching frequency to an external clock. Internal level-shift circuits allow the I/O pins (RUN, MODE/SYNC, PGOOD) to be referenced to board GND.

The LTC7149 operates with a peak current mode architecture that allows for fast transient response with inherent cycle-to-cycle current limit protection.

Product Features

 • Wide VIN Range: 3.4V to 60V

 • Wide VOUT Range: 0V to –28V

 • Single Resistor VOUT Programming

 • Integrated 110mΩ Top N-Channel/50mΩ Bottom N-Channel MOSFETs

 • Regulated IQ: 440µA, Shutdown IQ: 15µA

 • Board GND Referenced I/O Pins (RUN, PGOOD, MODE/SYNC)

 • Accurate Resistor Programmable 

Frequency (300kHz to 3MHz) with ±50% 

Frequency Sync Range

 • 92% Efficiency with 12 VIN and –5VOUT

 • ±0.8% Output Voltage Accuracy

 • Peak Current Mode Operation 

 • Burst Mode® Operation, Forced Continuous Mode

 • Programmable Soft-Start

 • Overtemperature Protection

 • Available in 28-Lead (4mm x 5mm) QFN and TSSOP Packages

Product Applications

 • Industrial Applications

 • Telecom Power Supplies

 • Distributed Power Systems

Specifications

Attribute

Attribute value

ANSM-Part#

ANSM-LTC7149EUFD#PBF

Category

Integrated Circuits (ICs)

Power Management (PMIC)

Voltage Regulators - DC DC Switching Regulators

Mfr

Analog Devices Inc.

Series

-

Package

Tube

Product Status

Active

Function

Step-Down

Output Configuration

Negative

Topology

Buck

Output Type

Adjustable

Number of Outputs

1

Voltage - Input (Min)

3.4V

Voltage - Input (Max)

60V

Voltage - Output (Min/Fixed)

0V

Voltage - Output (Max)

-28V

Current - Output

4A

Frequency - Switching

1MHz

Synchronous Rectifier

Yes

Operating Temperature

-40°C ~ 125°C (TJ)

Mounting Type

Surface Mount

Package / Case

28-WFQFN Exposed Pad

Supplier Device Package

28-QFN (4x5)

Base Product Number

LTC7149

Actual product photos

LTC7149EUFD#PBF

Product Data Book:

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​For more product information, please download the PDF

Payment&Transportation

详情8.1

Official Certificate&Certificate

详情页3.1

Multiple product supply

详情5.1

Company office environment

详情6.1

Warehouse Real Shot

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Standard packaging

详情9

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Professional supply Integrated circuit IC LTC7149EUFD PBF Buck Switching Regulator IC Negative Adjustable 0V 1 Output 4A 28WFQFN

Conv DC-DC 3.4V to 60V Synchronous Step Down Single-Out 0V to -28V 4A 28-Pin QFN EP Tube

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