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PDF IR3838MPbF Data sheet ( Hoja de datos )
| Número de pieza | IR3838MPbF | |
| Descripción | SYNCHRONOUS BUCK REGULATOR | |
| Fabricantes | International Rectifier | |
| Logotipo |  |
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PD97512
IR3838MPbF
SupIRBuckTM
HIGHLY INTEGRATED 10A
SINGLE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
Features
Description
• Greater than 96% Maximum Efficiency
The IR3838 SupIRBuckTM is an easy-to-use, fully
• Single 16V Application
integrated and highly efficient DC/DC regulator.
• Single 5V Application
The onboard PWM controller and MOSFETs
• Wide Output Voltage Range: 0.6V to 0.9*Vin
make IR3838 a space-efficient solution, providing
•
•
•
Continuous 10A Load Capability
Programmable Switching Frequency up to 1.5MHz
Internal Digital Soft-Start
accurate power delivery for low output voltage
applications.
• Enable Input with Voltage Monitoring Capability
IR3838 is a versatile regulator which offers
• Hiccup Mode Over Current Protection
programmability of switching frequency and
• Internal LDO
current limit while operates in wide input and
• External Synchronization
output voltage range.
• Enhanced PreBias Start up
The switching frequency is programmable from
• External Reference for Margining Purposes
250kHz to 1.5MHz for an optimum solution.
• Input for Tracking Applications
• Integrated MOSFET Drivers and Bootstrap Diode It also features important protection functions,
• Operating Junction Temp: -40oC <Tj<125oC
such as Pre-Bias startup, hiccup current limit and
• Thermal Shut Down
thermal shutdown to give required system level
• Power Good Output with tracking capability
security in the event of fault conditions.
• Over Voltage Detection Feature
IR3838 offers margining capability through Vref
• Pin Compatible with 6A and 14A Versions
pin. During the margining operation, PGood
• Small Size 5mmx6mm PQFN, 0.9 mm Height
tracks Vref via feedback to ensure correct status
• Lead-free, Halogen-free and RoHS Compliant
of the output voltage.
Applications
• Netcom and Telecom Applications
• Data Center Applications
• Distributed Point of Load Power Architectures
The internal LDO enables the device to operate
from a single supply. This internal LDO can be
bypassed when an external bias voltage is
available.
Rev 1.41
Fig. 1. Typical application diagram
1
1 page  
Recommended Operating Conditions
IR3838MPbF
Symbol
PVin
Vin
Vcc/LDO_out
Boot to SW
Vo
Io
Fs
Tj
Definition
Input Voltage for power stage
Input Voltage for internal LDO *
Supply Voltage *
Supply Voltage
Output Voltage
Output Current
Switching Frequency
Junction Temperature
Min
1.5
7.0
4.5
4.5
0.6
0
225
-40
Max
16
16
6.5
7.5
0.9*Vin
10
1650
125
Units
V
A
kHz
oC
* Vcc/LDO_out can be connected to an external regulated supply (≈ 5V). If so, the Vin input should be
left unconnected.
Electrical Specifications
Unless otherwise specified, these specification apply over, 7.0V<Vin=PVin<16V, Vref=0.6V
in 0oC<Tj< 125oC. Typical values are specified at Ta = 25oC.
PARAMETER
POWER STAGE
Power Losses
Top Switch
Bottom Switch
Bootstrap Diode Forward
Voltage
SW leakage Current
SYMBOL
TEST CONDITION
Ploss
Rds(on)_Top
Rds(on)_Bot
Vin=12V, Vo=1.8V, Io=10A,
Fs=600kHz, L=0.6uH, Note4
VBoot -Vsw =5.0V,
ID=10A,Tj=25C
Vcc=5.0V, ID=10A
I(Boot)= 30mA
Isw SW=0V, Enable=0V
SW=0V, Enable=high, Vp=0V
MIN TYP MAX
2
17.1 26
8.5 11
180 260 470
6
14
SUPPLY CURRENT
Vin Supply Current (Standby)
Vin Supply Current (Dyn)
Iin(Standby)
Iin(Dyn)
INTERNAL REGULATOR (LDO)
Output Voltage
IntVcc
IntVcc Dropout
Short Circuit Current
IntVcc_drop
Ishort
Enable low , No Switching,
Enable high, Fs=500kHz,
Vin=12V
Vin(min)=7.0V, Io=0-50mA,
Cload=2.2uF
Io=50mA, Cload=2.2uF
400
12
4.7 5.2 5.7
50 150
70
INTERNAL DIGITAL SOFT START
Soft Start Clock Frequency
Clk(SS)
Soft Start Ramp Rate
Ramp(SS)
Note4
168 200 254
0.2
UNIT
W
mΩ
mV
µA
µA
mA
V
mV
mA
kHz
mV/us
Rev 1.41
5
5 Page 
Rdson of MOSFETs Over Temperature at Vcc=5V
24
22
20
18
16
14
12
10
8
6
-40 -20 0 20 40 60 80
Temperature [C]
Sync-FET Ctrl-FET
IR3838MPbF
100 120 140
Rdson of Sync-FET versus Vcc at different Temperatures
14
13
12
11
10
9
8
7
6
5
4.5
4.75 5
-40C
5.25 5.5 5.75
Vcc [V]
6
0C 25C 65C 100C
6.25
125C
6.5
Rev 1.41
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet IR3838MPbF.PDF ] | |
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