DataSheet.jp

IR3447 の電気的特性と機能

IR3447のメーカーはInfineonです、この部品の機能は「Synchronous Buck Regulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 IR3447
部品説明 Synchronous Buck Regulator
メーカ Infineon
ロゴ Infineon ロゴ 




このページの下部にプレビューとIR3447ダウンロード(pdfファイル)リンクがあります。

Total 30 pages

No Preview Available !

IR3447 Datasheet, IR3447 PDF,ピン配置, 機能
25A Highly Integrated SupIRBuck®
Single-Input Voltage, Synchronous
Buck Regulator
DCDC Converter
SupIRBuck
IR3447
FEATURES
Single 5V to 21V application
Wide Input Voltage Range from 1.5V to 21V with
external Vcc
Output Voltage Range: 0.6V to 0.86*PVin
0.5% accurate Reference Voltage
Enhanced line/load regulation with Feed-Forward
Programmable Switching Frequency up to 1.5MHz
Internal Digital Soft-Start
Enable input with Voltage Monitoring Capability
Remote Sense Amplifier with True Differential
Voltage Sensing
Thermally compensated current limit and Hiccup
Mode Over Current Protection
Smart LDO to enhance efficiency
External synchronization with Smooth Clocking
Dedicated output voltage sensing for power good
indication and overvoltage protection which
remains active even when Enable is low.
Enhanced Pre-Bias Start up
Body Braking to improve transient
Integrated MOSFET drivers and Bootstrap diode
Thermal Shut Down
Post Package trimmed rising edge dead-time
Programmable Power Good Output
Small Size 5mm x 6mm PQFN
Operating Junction Temp: -40oC<Tj<125oC
Lead-free, Halogen-free and RoHS Compliant
DESCRIPTION
The IR3447 SupIRBuck® is an easy-to-use, fully
integrated and highly efficient DC/DC regulator. The
onboard PWM controller and MOSFETs make IR3447
a space-efficient solution, providing accurate power
delivery for low output voltage and high current
applications.
IR3447 is a versatile regulator which offers
programmability of switching frequency and current
limit while operating in wide input and output voltage
range.
The switching frequency is programmable from 300
kHz to 1.5MHz for an optimum solution.
It also features important protection functions, such as
Over Voltage Protection (OVP), Pre-Bias startup,
hiccup current limit and thermal shutdown to give
required system level security in the event of fault
conditions.
APPLICATIONS
Server Application
Distributed Point of Load Power Architectures
Set Top Box Application
Power Supplies
ORDERING INFORMATION
Base Part
Number
Package Type
IR3447
PQFN 5mm x 6mm
Standard Pack
Form
Quantity
Tape and Reel
4000
Orderable Part
Number
IR3447MTRPBF
1 Rev 3.7
May 17, 2016

1 Page





IR3447 pdf, ピン配列
FUNCTIONAL BLOCK DIAGRAM
IR3447
Vin
LGnd
Comp
CByp
FB
Vsns
Enable
Smart
LDO
DCM
VCC
THERMAL
SHUTDOWN
TSD
VREF
0.6V
FB
UVcc UVcc
+
+ E/A
-
VREF
UVcc
OVER
VOLTAGE
OC
FAULT
CONTROL
POR
OV
FAULT
DRIVER
HDrv
POR +
Intl_SS
POR
FAULT
DIGITAL
SOFT
START
PVin
SSOK
HDin
LDin
CLK
BODY
BRAKING
CONTROL
LDrv
UVEN
UVEN
CONTROL
ZC ZERO CROSSING
COMPARATOR
UVcc
POR POR
LOGIC
OC OVER CURRENT
RS- - VREF
RS+ + FB
DCM
RSo Rt/Sync PGD
Figure 3: IR3447 Simplified Block Diagram
VCC/
LDO_out
Boot
PVin
SW
PGnd
OCset
3 Rev 3.7
May 17, 2016


3Pages


IR3447 電子部品, 半導体
IR3447
ELECTRICAL SPECIFICATIONS
RECOMMENDED OPERATING CONDITIONS
SYMBOL
DEFINITION
MIN
PVin
Input Bus Voltage *
1.5
Vin Supply Voltage
5.0
VCC
Supply Voltage **
4.5
Boot to SW
Supply Voltage
4.5
VO Output Voltage
IO Output Current
Fs Switching Frequency
0.6
0
300
TJ Junction Temperature
-40
* SW node must not exceed 25V
** When VCC is connected to an externally regulated supply, also connect Vin.
MAX
21
21
7.5
7.5
0.86 * PVin
±25
1500
125
UNITS
V
A
kHz
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specification apply over, 1.5V < PVin < 21V, 4.5V< VCC < 7.5V, 0oC < TJ <
125oC.
Typical values are specified at TA = 25oC.
PARAMETER
Power Loss
SYMBOL
CONDITIONS
MIN TYP MAX UNIT
Power Loss
MOSFET Rds(on)
Top Switch
Bottom Switch
PLOSS
Rds(on)_Top
Rds(on)_Bot
Vin = PVin = 12V, VO =
1.2V, IO = 25A, Fs =
600kHz, L=0.215uH,
TA = 25°C, Note 4
VBoot – VSW = 6.8V,
ID = 25A, Tj = 25°C
VCC =6.8V, ID = 25A,
Tj = 25°C
3.62 W
4 5.2
mΩ
1.8 2.3
Reference Voltage
Feedback Voltage
Accuracy
VFB 0.6 V
Vref=0.6V,
0°C < Tj < 105°C
Vref=0.6V,
-40°C < Tj < 125°C
-0.5
-1.0
+0.5
%
+1.0
Supply Current
Vin Supply Current
(Standby)
Iin(Standby)
Vin=21V, Enable low,
No Switching
300 425 µA
Vin Supply Current (Dyn)
Iin(Dyn)
Vin=21V, Enable high,
Fs = 600kHz
40 mA
6 Rev 3.7
May 17, 2016

6 Page



ページ 合計 : 30 ページ
 
PDF
ダウンロード
[ IR3447 データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
IR3447

Synchronous Buck Regulator

International Rectifier
International Rectifier
IR3447

Synchronous Buck Regulator

Infineon
Infineon
IR3448

Synchronous Buck Regulator

International Rectifier
International Rectifier
IR3448

Synchronous Buck Regulator

Infineon
Infineon


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap