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PDF IR3846 Data sheet ( Hoja de datos )
| Número de pieza | IR3846 | |
| Descripción | Synchronous Buck Regulator | |
| Fabricantes | Infineon | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de IR3846 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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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
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications are not implied.
PVin
Vin
VCC
SW
BOOT
BOOT to SW
Input/Output pins
RS+, RS-, RSo, PGD, Enable, OCset, S_Ctrl
PGND to LGND, RS- to LGND
Junction Temperature Range
Storage Temperature Range
Machine Model
ESD
Human Body Model
Charged Device Model
Moisture Sensitivity level
RoHS Compliant
-0.3V to 25V
-0.3V to 25V
-0.3V to 8V (Note 1)
-0.3V to 25V (DC), -4V to 25V (AC, 100ns)
-0.3V to 33V
-0.3V to VCC + 0.3V (Note 2)
-0.3V to 3.9V
-0.3V to 8V (Note 1)
-0.3V to + 0.3V
-40°C to 150°C
-55°C to 150°C
Class A
Class 1C
Class III
JEDEC Level 2 @ 260°C
Yes
Note:
1. VCC must not exceed 7.5V for Junction Temperature between -10°C and -40°C.
2. Must not exceed 8V.
THERMAL INFORMATION
Thermal Resistance, Junction to Case (θJC_TOP)
Thermal Resistance, Junction to PCB (θJB)
Thermal Resistance, Junction to Ambient (θJA) (Note 3)
30 °C/W
2.71 °C/W
14.3 °C/W
Note:
3. Thermal resistance (θJA) is measured with components mounted on a high effective thermal conductivity
test board in free air.
5 Rev 3.5
Feb 05, 2016
5 Page 
IR3846
TYPICAL EFFICIENCY AND POWER LOSS CURVES
PVin = Vin = 12V, VCC = Internal LDO, Io=0-35A, Fs= 600kHz, Room Temperature, LFM=200. Note that the
losses of the inductor, input and output capacitors are also considered in the efficiency and power loss curves.
The table below shows the indicator used for each of the output voltages in the efficiency measurement.
VOUT (V)
1.2
1.8
3.3
5.0
LOUT (uH)
0.25
0.33
0.33
0.33
P/N
744309025 (Wurth Electronik)
744309033 (Wurth Electronik)
744309033 (Wurth Electronik)
744309033 (Wurth Electronik)
DCR (mΩ)
0.165
0.165
0.165
0.165
11 Rev 3.5
Feb 05, 2016
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet IR3846.PDF ] | |
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