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IR3843WMPBFのメーカーはInternational Rectifierです、この部品の機能は「HIGHLY EFFICIENT INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR」です。 |
部品番号 | IR3843WMPBF |
| |
部品説明 | HIGHLY EFFICIENT INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR | ||
メーカ | International Rectifier | ||
ロゴ | |||
このページの下部にプレビューとIR3843WMPBFダウンロード(pdfファイル)リンクがあります。 Total 30 pages
PD-97507
IR3843WMPbFwww.DataSheet4U.com
SupIRBuckTM
HIGHLY EFFICIENT
INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR
Features
• Wide Input Voltage Range 1.5V to 16V
• Wide Output Voltage Range 0.7V to 0.9*Vin
• Continuous 2A Load Capability
• Integrated Bootstrap-diode
• High Bandwidth E/A for excellent transient
performance
• Programmable Switching Frequency up to 1.5MHz
• Programmable Over Current Protection
• PGood output
• Hiccup Current Limit
• Precision Reference Voltage (0.7V, +/-1%)
• Programmable Soft-Start
• Enable Input with Voltage Monitoring Capability
• Enhanced Pre-Bias Start-up
• Seq input for Tracking applications
• -40oC to 125oC operating junction temperature
• Thermal Protection
• Multiple current ratings in pin compatible footprint
• 5mm x 6mm Power QFN Package, 0.9 mm height
• Lead-free, halogen-free and RoHS compliant
Description
The IR3843W SupIRBuckTM is an easy-to-use,
fully integrated and highly efficient DC/DC
synchronous Buck regulator. The MOSFETs co-
packaged with the on-chip PWM controller make
IR3843W a space-efficient solution, providing
accurate power delivery for low output voltage
applications.
IR3843W is a versatile regulator which offers
programmability of start up time, switching
frequency and current limit while operating in
wide input and output voltage range.
The switching frequency is programmable from
250kHz to 1.5MHz for an optimum solution.
It also features important protection functions,
such as Pre-Bias startup, hiccup current limit and
thermal shutdown to give required system level
security in the event of fault conditions.
Applications
• Server Applications
• Storage Applications
• Embedded Telecom Systems
• Distributed Point of Load Power Architectures
• Netcom Applications
• Computing Peripheral Voltage Regulators
• General DC-DC Converters
1.5V <Vin<16V
4.5V <Vcc<5.5V
PGood
Seq Enable
Vcc
PGood
Rt
SS/ SD Gnd
Vin Boot
SW
OCSet
Fb
Comp
PGnd
Vo
Rev 10.0
Fig. 1. Typical application diagram
1
1 Page Block Diagram
PD-97507
IR3843WMPbFwww.DataSheet4U.com
Rev 10.0
Fig. 2. Simplified block diagram of the IR3843W
3
3Pages PD-97507
IR3843WMPbFwww.DataSheet4U.com
Electrical Specifications (continued)
Unless otherwise specified, these specifications apply over 4.5V< Vcc<5.5V, Vin=12V, 0oC<Tj< 125oC.
Typical values are specified at Ta = 25oC.
Parameter
Symbol
Test Condition
Min TYP MAX
Units
Oscillator
Rt Voltage
0.665
0.7
0.735
V
Frequency
Ramp Amplitude
Ramp Offset
Min Pulse Width
Fixed Off Time
Max Duty Cycle
Error Amplifier
Input Offset Voltage
Input Bias Current
Input Bias Current
Sink Current
Source Current
Slew Rate
Gain-Bandwidth Product
DC Gain
Maximum Voltage
Minimum Voltage
Common Mode Voltage
Soft Start/SD
Soft Start Current
Soft Start Clamp Voltage
Shutdown Output Threshold
Over Current Protection
OCSET Current
OC Comp Offset Voltage
SS off time
Bootstrap Diode
Forward Voltage
Deadband
Deadband time
FS
Vramp
Ramp (os)
Dmin(ctrl)
Dmax
Vos
IFb(E/A)
IVp(E/A)
Isink(E/A)
Isource(E/A)
SR
GBWP
Gain
Vmax(E/A)
Vmin(E/A)
ISS
Vss(clamp)
SD
IOCSET
VOFFSET
SS_Hiccup
Rt=59K
Rt=28.7K
Rt=9.31K, Note4
Note4
Note4
Note4
Note4
Fs=250kHz
Vfb-Vseq,
Vseq=0.8V
Note4
Note4
Note4
Vcc=4.5V
Note4
Source
Fs=250kHz
Fs=500kHz
Fs=1500kHz
Note4
I(Boot)=30mA
Note4
225
450
1350
92
-10
-1
-1
0.40
8
7
20
100
3.4
0
14
2.7
250
500
1500
1.8
0.6
100
130
0
0.85
10
12
30
110
3.5
120
20
3.0
20.8 23.6
43 48.8
136 154
-10 0
4096
180 260
5 10
275
550
1650
200
+10
+1
+1
1.2
13
20
40
120
3.75
220
1
26
3.3
0.3
26.4
54.6
172
+10
470
30
kHz
Vp-p
V
ns
%
mV
μA
mA
V/μs
MHz
dB
V
mV
V
μA
V
μA
mV
Cycles
mV
ns
Rev 10.0
6
6 Page | |||
ページ | 合計 : 30 ページ | ||
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PDF ダウンロード | [ IR3843WMPBF 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。 |
部品番号 | 部品説明 | メーカ |
IR3843WMPBF | HIGHLY EFFICIENT INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR | International Rectifier |