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PDF IR3832WMPBF Data sheet ( Hoja de datos )
| Número de pieza | IR3832WMPBF | |
| Descripción | HIGHLY EFFICIENT INTEGRATED SYNCHRONOUS BUCK REGULATOR | |
| Fabricantes | International Rectifier | |
| Logotipo |  |
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PD-97508
IR3832WMPbFwww.DataSheet4U.com
SupIRBuckTM
HIGHLY EFFICIENT INTEGRATED
SYNCHRONOUS BUCK REGULATOR FOR DDR APPLICATIONS
Features
Description
• Wide Input Voltage Range 1.5V to 16V
The IR3832W SupIRBuckTM is an easy-to-use,
• Wide Output Voltage Range 0.6V to 0.9*Vin
fully integrated and highly efficient DC/DC
• Continuous 4A Load Capability
regulator. The MOSFETS co-packaged with the
• Integrated Bootstrap-diode
on-chip PWM controller make IR3832W a space-
•
•
High Bandwidth E/A for excellent transient
performance
Programmable Switching Frequency up to 1.5 MHz
efficient solution, providing accurate
delivery for DDR memory applications.
power
• Programmable Over Current Protection
IR3832W is configured to generate termination
• PGood output
voltage (VTT) for DDR memory applications.
• Hiccup Current Limit
• Programmable Soft-Start
• Enable Input with Voltage Monitoring Capability
• Enhanced Pre-Bias Start-up
• Vp input for DDR Tracking applications
• -40oC to 125oC operating junction temperature
IR3832W 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.
• Thermal Protection
It also features important protection functions,
• 5mm x 6mm Power QFN Package, 0.9 mm height such as Pre-Bias startup, hiccup current limit and
• Halogen Free, Lead Free and RoHS Compliant
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
1.5V <Vin<16V
4.5V <Vcc<5.5V
VDDQ
PGood
Enable
Vcc
PGood
Vp
Rt
SS/ SD Gnd
Vin Boot
SW
OCSet
Fb
Comp
PGnd
Vo
Rev 3.0
Fig. 1. Typical application diagram
1
1 page  
Recommended Operating Conditions
PD-97508
IR3832WMPbFwww.DataSheet4U.com
Symbol
Vin
Vcc
Boot to SW
Vo
Io
Fs
Tj
Definition
Input Voltage
Supply Voltage
Supply Voltage
Output Voltage
Output Current
Switching Frequency
Junction Temperature
Min
Max
Units
1.5 16
4.5 5.5
4.5 5.5 V
0.6 0.90*Vin
0 4A
225
1650
kHz
-40 125 oC
Electrical Specifications
Unless otherwise specified, these specification apply over 4.5V< Vcc<5.5V, Vp=0.6V, Vin=12V,
0oC<Tj< 125oC. Typical values are specified at Ta = 25oC.
Parameter
Symbol
Power Loss
Power Loss
Ploss
MOSFET Rds(on)
Top Switch
Bottom Switch
Rds(on)_Top
Rds(on)_Bot
Supply Current
VCC Supply Current (Standby)
Vcc Supply Current (Dyn)
ICC(Standby)
ICC(Dyn)
Under Voltage Lockout
VCC-Start-Threshold
VCC-Stop-Threshold
Enable-Start-Threshold
Enable-Stop-Threshold
Enable leakage current
VCC_UVLO_Start
VCC_UVLO_Stop
Enable_UVLO_Start
Enable_UVLO_Stop
Ien
Test Condition
Vcc=5V, Vin=12V, Vo=0.75V, Io=4A,
Fs=400kHz, L=1.5uH, Note4
VBoot -Vsw =5V, ID=10A, Tj=25oC
Vcc=5V, ID=10A, Tj=25oC
SS=0V, No Switching, Enable low
SS=3V, Vcc=5V, Fs=500kHz
Enable high
Vcc Rising Trip Level
Vcc Falling Trip Level
Supply ramping up
Supply ramping down
Enable=3.3V
Min TYP MAX
0.51
22.6
15.1
29
20
500
10
3.95
3.65
1.14
0.9
4.15
3.85
4.35
4.05
1.2 1.36
1.0 1.06
15
Units
W
mΩ
μA
mA
V
μA
Rev 3.0
5
5 Page 
PD-97508
IR3832WMPbFwww.DataSheet4U.com
Typical Efficiency and Power Loss Curves
Vin=5V, Vcc=5V, Vo=0.75V, Io=0.5A-4A, Fs=400kHz, L=1.5uH (MPO104-1R5 from Delta), Room
Temperature, No Air Flow
90
89
88
87
86
85
84
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Load Current (A)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Load Current (A)
Rev 3.0
11
11 Page | ||
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| PDF Descargar | [ Datasheet IR3832WMPBF.PDF ] | |
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