Datasheet > GRM1885C1H181JA01D

GRM1885C1H181JA01D

更新时间： 2022-04-20 04:31:54

品牌	Logo	应用领域
英飞凌 - INFINEON		/
页数	文件大小	规格书
46页	3153K
描述
6A Highly Integrated SupIRBuck

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PD-97662

6A Highly Integrated SupIRBuck^TM

IR3898

Single-Input Voltage, Synchronous Buck Regulator

- 1 -

FEATURES

DESCRIPTION

integrated and highly efficient DC/DC regulator.

The onboard PWM controller and MOSFETs make

IR3898 a space-efficient solution, providing accurate

power delivery.

The IR3898 SupIRBuck^TMis an easy-to-use, fully

 Single 5V to 21V application

 Wide Input Voltage Range from 1.0V to 21V with

external Vcc

 Output Voltage Range: 0.5V to 0.86× Vin

 Enhanced Line/Load Regulation with Feed-Forward

 Programmable Switching Frequency up to 1.5MHz

 Internal Digital Soft-Start/Soft-Stop

IR3898 is a versatile regulator which offers

programmable switching frequency and the fixed

internal current limit while operates in wide input and

output voltage range.

 Enable input with Voltage Monitoring Capability

The switching frequency is programmable from 300kHz

to 1.5MHz for an optimum solution.

 Thermally Compensated Current Limit with robust

hiccup mode over current protection

 Smart Internal LDO to improve light load and full load

It also features important protection functions, such as

Pre-Bias startup, thermally compensated current limit,

over voltage protection and thermal shutdown to give

required system level security in the event of fault

conditions.

efficiency

 External Synchronization with Smooth Clocking

 Enhanced Pre-Bias Start-Up

 Precision Reference Voltage (0.5V+/-0.5%) with

margining capability

 Vp for Tracking Applications (Source/Sink Capability

APPLICATIONS

 Netcom Applications

+/-6A)

 Integrated MOSFET drivers and Bootstrap Diode

 Thermal Shut Down

 Embedded Telecom Systems

 Server Applications

 Programmable Power Good Output with tracking

 Storage Applications

capability

 Distributed Point of Load Power Architectures

 Monotonic Start-Up

 Operating temp: -40^oC < Tj < 125^oC

 Small Size: 4mm x 5mm PQFN

 Lead-free, Halogen-free and RoHS Compliant

BASIC APPLICATION

5V <Vin<21V

PVin

Vref S_Ctrl Vin

Vcc/

LDO_out

Boot

PGood

Vsns

PGood

IR3898

12Vin,Internal bias,Frequency 600KHz

Rt/Sync

Enable

0.6

1.2

1.8

2.4

3.6

Load Current (A)

1.2Vout 3.3Vout

4.2

4.8

5.4

Comp

Gnd

PGnd

Figure 1: IR3898 Basic Application Circuit

Figure 2:IR3898 Efficiency

JANURARY 18, 2013 | DATA SHEET | Rev 3.5

12 3 4 5 6 7...46

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