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IR3843WMPBF の電気的特性と機能

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。


製品の詳細 ( Datasheet PDF )

部品番号 IR3843WMPBF
部品説明 HIGHLY EFFICIENT INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR
メーカ International Rectifier
ロゴ International Rectifier ロゴ 




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IR3843WMPBF Datasheet, IR3843WMPBF PDF,ピン配置, 機能
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





IR3843WMPBF pdf, ピン配列
Block Diagram
PD-97507
IR3843WMPbFwww.DataSheet4U.com
Rev 10.0
Fig. 2. Simplified block diagram of the IR3843W
3


3Pages


IR3843WMPBF 電子部品, 半導体
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



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部品番号部品説明メーカ
IR3843WMPBF

HIGHLY EFFICIENT INTEGRATED 2A SYNCHRONOUS BUCK REGULATOR

International Rectifier
International Rectifier


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