DataSheet.jp

IR3898 の電気的特性と機能

IR3898のメーカーはInternational Rectifierです、この部品の機能は「6A Highly Integrated SupIRBuck Synchronous Buck Regulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 IR3898
部品説明 6A Highly Integrated SupIRBuck Synchronous Buck Regulator
メーカ International Rectifier
ロゴ International Rectifier ロゴ 




このページの下部にプレビューとIR3898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 !

IR3898 Datasheet, IR3898 PDF,ピン配置, 機能
6A Highly Integrated SupIRBuckTM
Single-Input Vo- l1ta-ge, Synchronous Buck Regulator
PD-97662
IR3898
FEATURES
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
Enable input with Voltage Monitoring Capability
Thermally Compensated Current Limit with robust
hiccup mode over current protection
Smart Internal LDO to improve light load and full load
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
+/-6A)
Integrated MOSFET drivers and Bootstrap Diode
Thermal Shut Down
Programmable Power Good Output with tracking
capability
Monotonic Start-Up
Operating temp: -40oC < Tj < 125oC
Small Size: 4mm x 5mm PQFN
Lead-free, Halogen-free and RoHS Compliant
DESCRIPTION
The IR3898 SupIRBuckTM is an easy-to-use, fully
integrated and highly efficient DC/DC regulator.
The onboard PWM controller and MOSFETs make
IR3898 a space-efficient solution, providing accurate
power delivery.
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.
The switching frequency is programmable from 300kHz
to 1.5MHz for an optimum solution.
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.
APPLICATIONS
Netcom Applications
Embedded Telecom Systems
Server Applications
Storage Applications
Distributed Point of Load Power Architectures
BASIC APPLICATION
5V <Vin<21V
PGood
Vp
Vref S_Ctrl Vin PVin Boot
Vcc/
LDO_out
SW
PGood IR3898
Vp
Vsns
Rt/Sync
Fb
Enable
Gnd
Comp
PGnd
Vo
Figure 1: IR3898 Basic Application Circuit
98
96
94
92
90
88
86
84
82
80 12Vin,Internal bias,Frequency 600KHz
78
0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4
Load Current (A)
1.2Vout 3.3Vout
6
Figure 2:IR3898 Efficiency
1 JANURARY 18, 2013 | DATA SHEET | Rev 3.5

1 Page





IR3898 pdf, ピン配列
BLOCK DIAGRAM
6A Highly Integrated SupIRBuckTM
Single-Input Vo- l3ta-ge, Synchronous Buck Regulator
PD-97662
IR3898
Gnd
Comp
Vref
Vp
Fb
S_Ctrl
Enable
VLDO_Ref
-
+
LDO
Vin Vcc/ LDO_out
UVcc
VCC
UVcc
POR
FAULT
TSD THERMAL
SHUT DOWN
DCM OV CONTROL OC
0.15V
VREF
+
+ E/A
+
-
0.5V
FB
Intl_SS
SOFT
START
FAULT
SSOK
POR
UVEN
UVEN
Vin Rff
VREF
Vp
FAULT
CONTROL
LOGIC
UVcc
OV
POR
POR
VREF
OVER VOLTAGE
PROTECTION
OV
POR
FAULT
HDin
GATE
DRIVE
LOGIC
LDin
VCC
DCM
ZERO CROSSING
COMPARATOR
OC OVER CURRENT
PROTECTION
HDrv
LDrv
Vsns
Rt/Sync
PGood
Figure 3: IR3898 Simplified Block Diagram
Boot
PVin
SW
PGnd
3 JANURARY 18, 2013 | DATA SHEET | Rev 3.5


3Pages


IR3898 電子部品, 半導体
6A Highly Integrated SupIRBuckTM
Single-Input Vo- l6ta-ge, Synchronous Buck Regulator
PD-97662
IR3898
ELECTRICAL SPECIFICATIONS
RECOMMENDED OPERATING CONDITIONS FOR RELIABLE OPERATION WITH MARGIN
Input Voltage Range*
Input Voltage Range**
Supply Voltage Range***
Supply Voltage Range
Output Voltage Range
Output Current Range
Switching Frequency
Operating Junction Temperature
SYMBOL
PVin
Vin
VCC
Boot to SW
VO
IO
FS
TJ
MIN
1.0
5
4.5
4.5
0.5
0
300
-40
MAX
21
21
7.5
7.5
0.86xVin
±6
1500
125
UNITS
V
A
kHz
°C
*Maximum SW node voltage should not exceed 25V.
** For internally biased single rail operation. When Vin drops below 6.8V, the internal LDO enters dropout. Please refer to Smart LDO
section and Over Current Protection for detailed application information.
***Vcc/LDO_Out can be connected to an external regulated supply. If so, the Vin pin should be connected to Vcc/LDO_Out pin.
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over, 6.8V < Vin = PVin < 21V, Vref = 0.5V in 0°C < TJ < 125°C.
Typical values are specified at Ta = 25°C.
PARAMETER
Power Stage
Power Losses
Top Switch
Bottom Switch
Bootstrap Diode Forward Voltage
SW Leakage Current
Dead Band Time
Supply Current
VIN Supply Current (standby)
VIN Supply Current (dynamic)
Vcc/ LDO_Out
Output Voltage
LDO dropout Voltage
SYMBOL
CONDITIONS
MIN TYP MAX UNIT
PLOSS
Rds(on)_Top
Rds(on)_Bot
ISW
Tdb
Vin = 12V, VO = 1.2V, IO = 6A,
Fs = 600kHz, L = 1uH,
Vcc = 6.4V, Note 4
0.85
VBoot-Vsw= 6.4V,IO= 6A,Tj=25°C
17.5 22.5
Vcc = 6.4V, IO = 6A, Tj=25°C
11.4 14.8
I(Boot) = 10mA
180 260 470
SW = 0V, Enable = 0V
SW = 0V, Enable = high,
Vp = 0V
Note 4
1
5 10 30
W
mΩ
mV
µA
ns
Iin(Standby)
Iin(Dyn)
EN = Low, No Switching
EN = High, Fs = 600kHz,
Vin = PVin = 21V
100 µA
11 15 mA
Vcc
Vcc_drop
Vin(min) = 6.8V, Icc = 0-30mA,
Cload = 2.2uF, DCM = 0
6.0
6.4
6.7
Vin(min) = 6.8V, Icc = 0-30mA,
Cload = 2.2uF, DCM = 1
4.0
4.4
4.8
Icc=30mA,Cload=2.2uF
0.7
V
V
6 JANURARY 18, 2013 | DATA SHEET | Rev 3.5

6 Page



ページ 合計 : 30 ページ
 
PDF
ダウンロード
[ IR3898 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
IR3891

Highly Integrated SupIRBuck

International Rectifier
International Rectifier
IR3892

Highly Integrated SupIRBuck

International Rectifier
International Rectifier
IR3894

12A HIGHLY INTERGRATED SUPLRBUCK

International Rectifier
International Rectifier
IR3895

16A HIGHLY INTERGRATED SUPLRBUCK

International Rectifier
International Rectifier


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