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CDRH103R Folha de dados(PDF) 1 Page - Analog Devices

Nome de Peças CDRH103R
Descrição Electrónicos  6.5 V, 4 A, High Efficiency
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

CDRH103R Folha de dados(HTML) 1 Page - Analog Devices

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6.5 V, 4 A, High Efficiency,
Step-Down DC-to-DC Regulator
Data Sheet
ADP2164
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.
FEATURES
4 A continuous output current
43 mΩ and 29 mΩ integrated FET
±1.5% output accuracy
Input voltage range: 2.7 V to 6.5 V
Output voltage: 0.6 V to VIN
Switching frequency
Fixed frequency: 600 kHz or 1.2 MHz
Adjustable frequency: 500 kHz to 1.4 MHz
Synchronizable from 500 kHz to 1.4 MHz
Selectable synchronize phase shift: 0° or 180°
Current mode architecture
Precision enable input
Power-good output
Voltage tracking input
Integrated soft start
Internal compensation
Starts up into a precharged output
UVLO, OVP, OCP, and thermal shutdown
Available in 16-lead, 4 mm × 4 mm LFCSP package
APPLICATIONS
Point-of-load conversion
Communications and networking equipment
Industrial and instrumentation
Consumer electronics
TYPICAL APPLICATIONS CIRCUIT
ADP2164
PGOOD
EN
COUT
C1
R2
RT
CIN
VOUT
VIN
SYNC
TRK
RT
SW
FB
PGND
GND
VIN
L
R1
PVIN
Figure 1.
100
95
90
85
80
75
70
65
60
55
50
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
OUTPUT CURRENT (A)
VIN = 5V
fS = 600kHz
VOUT = 1.2V
VOUT = 3.3V
Figure 2. Efficiency vs. Output Current
GENERAL DESCRIPTION
The ADP2164 is a 4 A, synchronous, step-down dc-to-dc regulator
in a compact 4 mm × 4 mm LFCSP package. The regulator uses a
current mode, constant frequency pulse-width modulation (PWM)
control scheme for excellent stability and transient response.
The input voltage range of the ADP2164 is 2.7 V to 6.5 V. The
output voltage of the ADP2164 is adjustable from 0.6 V to the
input voltage (VIN). The ADP2164 is also available in six preset
output voltage options: 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V.
The ADP2164 integrates a pair of low on-resistance P-channel
and N-channel internal MOSFETs to maximize efficiency and
minimize external component count. The 100% duty cycle
operation allows low dropout voltage at 4 A output current.
The high, 1.2 MHz PWM switching frequency allows the use of
small external components, and the SYNC input enables multiple
ICs to synchronize out of phase to reduce ripple and eliminate
beat frequencies.
Other key features of the ADP2164 include undervoltage lockout
(UVLO), integrated soft start to limit inrush current at startup,
overvoltage protection (OVP), overcurrent protection (OCP),
and thermal shutdown.


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