IRDC3895 International Rectifier, IRDC3895 Datasheet

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IRDC3895

Manufacturer Part Number
IRDC3895
Description
Power Management IC Development Tools Design Kit Featuring IR3895M
Manufacturer
International Rectifier
Type
DC/DC Converters, Regulators & Controllersr
Datasheet

Specifications of IRDC3895

Product
Evaluation Boards
Tool Is For Evaluation Of
IR3895
Input Voltage
12 V
Output Voltage
1.2 V
DESCRIPTION
The
converter,
performance and flexible solution in a small
5mm X 6 mm Power QFN package.
Key features offered by the IR3895 include
internal Digital Soft Start/Soft Stop, precision
0.5Vreference
thermal protection, programmable switching
frequency, Enable input, input under-voltage
lockout for proper start-up, enhanced line/
load regulation with feed forward, external
frequency
clocking, smart internal LDO
start-up.
•V
SupIRBuck
BOARD FEATURES
12/5/2012
V
F
L= 0.4uH
C
C
out
s
in
in
out
=600kHz
IR3895
= 5x10uF (ceramic 1206) + 1X330uF (electrolytic)
= +1.2V @ 0- 16A
= +12V (+ 13.2V Max)
=6x47uF (ceramic 0805)
synchronization
providing
is
voltage,
USER GUIDE FOR IR3895 EVALUATION BOARD
a
synchronous
a
TM
compact,
Power
with
and pre-bias
smooth
Good
buck
high
,
1.2Vout
Output
implemented by sensing the voltage developed
across the on-resistance of the synchronous
rectifier
performance and the current limit is thermally
compensated.
This user guide contains the schematic and bill
of materials for the IR3895 evaluation board.
The guide describes operation and use of the
evaluation board itself. Detailed
information for IR3895 is available in the
IR3895 data sheet.
over-current protection
MOSFET
IRDC3895-P1V2
for
optimum
function
application
cost
and
is
1

Related parts for IRDC3895

IRDC3895 Summary of contents

Page 1

... This user guide contains the schematic and bill , Good of materials for the IR3895 evaluation board. The guide describes operation and use of the evaluation board itself. Detailed information for IR3895 is available in the IR3895 data sheet. with smooth and pre-bias IRDC3895-P1V2 over-current protection function MOSFET for optimum cost application is and 1 ...

Page 2

... Table I. Connections Connection Signal Name VIN+ Vin (+12V) VIN- Ground of Vin Vout+ Vout(+1.2V) Vout- Ground for Vout Vcc+ Vcc/ LDO_out Pin Vcc- Ground for Vcc input Enable Enable PGood Power Good Signal Gnd Analog ground IRDC3895-P1V2 2 ...

Page 3

... Enable VDDQ Vref Sync PGood AGnd Fig. 1: Connection Diagram of IR3895/94 Evaluation Boards 12/5/2012 Vin Gnd Gnd Vout S_Ctrl Vsns Vcc+ Vcc- IRDC3895-P1V2 Top View Bottom View 3 ...

Page 4

... Single point connection between Analog Gnd and PGnd 12/5/2012 Fig. 2: Board Layout-Top Layer Fig. 3: Board Layout-Bottom Layer IRDC3895-P1V2 4 ...

Page 5

... Fig. 4: Board Layout-Mid Layer 1 12/5/2012 Fig. 5: Board Layout-Mid Layer 2 IRDC3895-P1V2 5 ...

Page 6

... ble IRDC3895-P1V2 ...

Page 7

... Thick Film, 0603,1/10W,1% 100 Thick Film, 0603,1/10W,1% 20 Thick Film, 0603,1/10W,1% 39.2k Thick Film, 0603,1/10W 0 Thick Film, 0603,1/10W,1% 49.9k Thick Film, 0603,1/10W,1% 7.5k IR3895 PQFN 5x6mm IRDC3895-P1V2 Manufacturer Part Number Panasonic EEV-FK1E331P TDK C3216X5R1E106M Murata GRM188R71E104KA01B Murata GRM1885C1H101JA01D Murata GRM188R71H332KA01B Murata ...

Page 8

... Fig. 9: Start up with Pre Bias , 0A Load Fig. 11: Inductor node at 16A load Ch :Switch Node 1 12/5/2012 Ch :Enable 4 Fig. 10: Output Voltage Ripple, 16A load Fig. 12: Short circuit (Hiccup) Recovery IRDC3895-P1V2 Fig. 8: Start up at 16A Load PGood out ...

Page 9

... TYPICAL OPERATING WAVEFORMS Vin=12.0V, Vo=1.2V, Io=0-16A, Room Temperature, no air flow Fig. 13: Transient Response 16A step @2.5A/usec slew rate 12/5/2012 IRDC3895-P1V2 Ch :V Ch4-Iout 1 out 9 ...

Page 10

... TYPICAL OPERATING WAVEFORMS Vin=12.0V, Vo=1.2V, Io=0-16A, Room Temperature Fig. 14: Bode Plot at 16A load shows a bandwidth of 95.2kHz and phase margin of 54.5º 12/5/2012 IRDC3895-P1V2 10 ...

Page 11

... TYPICAL OPERATING WAVEFORMS Vin=12.0V, Vo=1.2V, Io=0-16A, Room Temperature, no air flow Fig (15) Soft start and soft stop using S_Ctrl pin Fig (16) Feed Forward for Vin change from 6.8 to 16V and back to 6.8V 12/5/2012 IRDC3895-P1V2 Ch -Vout Ch -Vin ...

Page 12

... TYPICAL OPERATING WAVEFORMS Vin=12.0V, Vo=1.2V, Io=0-16A, Room Temperature, no air flow 12/5/2012 Fig.17: Efficiency versus load current Fig.18: Power loss versus load current IRDC3895-P1V2 12 ...

Page 13

... THERMAL IMAGES Vin=12.0V, Vo=1.2V, Io=0-16A, Room Temperature, No Air flow Fig. 19: Thermal Image of the board at 16A load 12/5/2012 Test point 1 is IR3895 Test point 2 is inductor IRDC3895-P1V2 13 ...

Page 14

... BASIC t1, t2, t3 0.0335 BASIC t4 t5 Figure 20: Package Dimensions 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 12/11 IRDC3895-P1V2 MILIMITERS INCHES MIN MAX MIN MAX 0.350 0.450 ...

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