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IR3853MPBFのメーカーはInternational Rectifierです、この部品の機能は「SYNCHRONOUS BUCK REGULATOR」です。 |
部品番号 | IR3853MPBF |
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部品説明 | 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IR3853MPBFダウンロード(pdfファイル)リンクがあります。 Total 35 pages
PD-97516
IR3853MPbF
SupIRBuckTM
HIGHLY EFFICIENT
INTEGRATED 4A, SYNCHRONOUS BUCK REGULATOR
Features
• Greater than 95% Maximum Efficiency
• Wide Input Voltage Range 1.5V to 21V
• Wide Output Voltage Range 0.7V to 0.9*Vin
• Continuous 4A Load Capability
• Integrated Bootstrap-diode
• High Bandwidth E/A for excellent transient
performance
• Programmable Switching Frequency up to 1.5MHz
• Programmable Over Current Protection
• Over Voltage Protection
• Dedicated input for output voltage monitoring
• Programmable 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
• External Synchronization
• -40oC to 125oC operating junction temperature
• Thermal Protection
• 4mm x 5mm Power QFN Package
• Halogen Free, Lead Free and RoHS compliant
Description
The IR3853 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
IR3853 a space-efficient solution, providing
accurate power delivery for low output voltage
applications.
IR3853 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,
over-voltage, 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
Rev 4.0
Fig. 1. Typical application diagram
1
Free Datasheet http://www.datasheet4u.com/
1 Page Block Diagram
PD-97516
IR3853MPbF
Fig. 2. Simplified block diagram of the IR3853
Rev 4.0
3
Free Datasheet http://www.datasheet4u.com/
3Pages PD-97516
IR3853MPbF
Electrical Specifications
Unless otherwise specified, these specification apply over 4.5V< Vcc<5.5V, Vin=12V, 0oC<Tj< 125oC.
Typical values are specified at Ta = 25oC.
PARAMETER
ERROR AMPLIFIER
Input Offset Voltage
SYMBOL
Vos
TEST CONDITION
Vfb-Vseq, Vseq=0.8V
MIN TYP MAX UNIT
-10 +10 mV
Input Bias Current
Input Bias Current
IFb(E/A)
IVseq(E/A)
-1 +1
-1 +1 μA
Sink Current
Source Current
Isink(E/A)
Isource(E/A)
0.40 0.85
8 10
1.2
13
mA
Slew Rate
SR Note4
7 12 20 V/μs
Gain-Bandwidth Product
GBWP
Note4
20 30 40 MHz
DC Gain
Gain
Note4
100 110 120
dB
Maximum Voltage
Vmax(E/A) Vcc=4.5V
3.4 3.5 3.75
V
Minimum Voltage
Vmin(E/A)
120 220
mV
Seq Common Mode Voltage
Note4
0 1V
OSCILLATOR
Rt Voltage
Frequency Range
Ramp Amplitude
Ramp Offset
Min Pulse Width
Max Duty Cycle
Fixed Off Time
Sync Frequency Range
Sync Pulse Duration
Sync Level Threshold
Vrt
FS
Vramp
Ramp(os)
Dmin(ctrl)
Dmax
Toff
Fsync
Tsync
High
Low
Rt=59K
Rt=28.7K
Rt=9.31K, Note4
Note4
Note4
Note4
Fs=250kHz
Note4
0.665
225
450
1350
92
225
100
2
0.7
250
500
1500
1.8
0.6
50
130
200
0.735
275
550
1650
200
1650
0.6
V
kHz
Vp-p
V
ns
%
ns
kHz
ns
V
Rev 4.0
6
Free Datasheet http://www.datasheet4u.com/
6 Page | |||
ページ | 合計 : 35 ページ | ||
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PDF ダウンロード | [ IR3853MPBF 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 |
IR3853MPBF | SYNCHRONOUS BUCK REGULATOR | International Rectifier |