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IR3846 の電気的特性と機能

IR3846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 IR3846
部品説明 Synchronous Buck Regulator
メーカ Infineon
ロゴ Infineon ロゴ 




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IR3846 Datasheet, IR3846 PDF,ピン配置, 機能
35A Highly Integrated SupIRBuck®
Single-Input Voltage, Synchronous
Buck Regulator
DCDC Converter
SupIRBuck
IR3846
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
Vp for tracking applications and sequencing
Vref is available externally to enable margining
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 with tracking
Small Size 5mm x 7mm PQFN
Operating Junction Temp: -40oC<Tj<125oC
Lead-free, Halogen-free and RoHS Compliant
DESCRIPTION
The IR3846 SupIRBuck® is an easy-to-use, fully
integrated and highly efficient DC/DC regulator. The
onboard PWM controller and MOSFETs make IR3846
a space-efficient solution, providing accurate power
delivery for low output voltage and high current
applications.
IR3846 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
Netcom Applications
Embedded Telecom Systems
Server Application
Distributed Point of Load Power Architectures
Storage Applications
ORDERING INFORMATION
Base Part
Number
Package Type
IR3846
PQFN 5mm x 7mm
IR3846
Standard Pack
Form
Quantity
Tape and Reel
4000
Orderable Part
Number
IR3846MTRPBF
1 Rev 3.5
PBF Lead Free
TR Tape and Reel
M Package Type
Feb 05, 2016

1 Page





IR3846 pdf, ピン配列
FUNCTIONAL BLOCK DIAGRAM
IR3846
Vin
LGnd
Smart
LDO
DCM
VCC
UVcc
THERMAL
SHUTDOWN
UVcc
Comp
Vp
Vref
VREF
0.6V
FB
Vsns
S_Ctrl
FB
Intl_SS
Vref
Vp
POR
VCC
100K
POR
FAULT
DIGITAL
SOFT
START
+
+ E/A
+
-
OVER
VOLTAGE
PVin
SSOK
TSD
OC
FAULT
CONTROL
POR
OV
FAULT
POR
HDin
LDin
CLK
HDrv
DRIVER
+
BODY
BREAKING LDrv
CONTROL
Enable
RS-
RS+
UVEN
UVcc
UVEN
POR
-
+
POR
Vp
VREF
FB
CONTROL
LOGIC
ZC ZERO CROSSING
COMPARATOR
OC OVER CURRENT
DCM
VCC
Boot
PVin
SW
PGnd
OCset
RSo Rt/Sync PGD
Figure 3: IR3846 Simplified Block Diagram
3 Rev 3.5
Feb 05, 2016


3Pages


IR3846 電子部品, 半導体
IR3846
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
±35
1500
125
UNIT
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
SYMBOL
CONDITIONS
MIN TYP MAX UNIT
Power Loss
Power Loss
MOSFET Rds(on)
Top Switch
Bottom Switch
PLOSS
Rds(on)_Top
Rds(on)_Bot
Vin = PVin = 12V, VO =
1.2V, IO = 35A, Fs =
600kHz, L=0.250uH,
TA = 25°C, Note 4
VBoot VSW = 6.8V,
ID = 35A, Without Cu
Clip, Tj = 25°C
VCC =6.8V, ID = 35A,
With Cu Clip,
Tj = 25°C
5.3 W
3.1 4
1.27 1.64
mΩ
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
Sink Current
Source Current
Isink_Vref
Isrc_Vref
Vref=0.7V
Vref=0.5V
12.7 16.0 19.3
12.7 16.0 19.3
µA
Vref Comparator Threshold
Vref_disable
Vref Pin connected
externally
0.15 V
6 Rev 3.5
Feb 05, 2016

6 Page



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