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ADP2303-EVALZ Arkusz danych(PDF) 1 Page - Analog Devices

Numer części ADP2303-EVALZ
Szczegółowy opis  2 A/3 A, 20 V, 700 kHz, Nonsynchronous Step-Down Regulators
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Strona internetowa  http://www.analog.com
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2 A/3 A, 20 V, 700 kHz,
Nonsynchronous Step-Down Regulators
Data Sheet
ADP2302/ADP2303
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevices foritsuse,norforanyinfringements of patents orother
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
©2010–2012 Analog Devices, Inc. All rights reserved.
FEATURES
Wide input voltage range: 3.0 V to 20 V
Maximum load current
2 A for ADP2302
3 A for ADP2303
±1.5% output accuracy over temperature
Output voltage down to 0.8 V
700 kHz switching frequency
Current-mode control architecture
Automatic PFM/PWM mode
Precision enable pin with hysteresis
Integrated high-side MOSFET
Integrated bootstrap diode
Internal compensation and soft start
Power-good output
Undervoltage lockout (UVLO)
Overcurrent protection (OCP)
Thermal shutdown (TSD)
8-lead SOIC package with exposed paddle
Supported by ADIsimPower™ design tool
APPLICATIONS
Intermediate power rail conversion
DC-to-DC point of load applications
Communications and networking
Industrial and instrumentation
Healthcare and medical
Consumer
TYPICAL APPLICATIONS CIRCUIT
VIN
VIN
VOUT
ADP2302/
ADP2303
PGOOD
EN
GND
OFF
ON
BST
SW
FB
Figure 1. Typical Application Circuit
40
50
60
70
80
90
100
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT CURRENT (A)
INDUCTOR: VLF10040T
-4R7N5R4
DIODE: SSB43L
VOUT = 3.3V
VOUT = 5.0V
Figure 2. ADP2303 Efficiency vs. Output Current at VIN = 12 V
GENERAL DESCRIPTION
The ADP2302/ADP2303 are fixed frequency, current-mode
control, step-down, dc-to-dc regulators with an integrated
power MOSFET. The ADP2302/ADP2303 can run from an
input voltage of 3.0 V to 20 V, which makes them suitable for a
wide range of applications. The output voltage of the ADP2302/
ADP2303 can be down to 0.8 V for the adjustable version, while
the fixed output version is available in preset output voltage
options of 5.0 V, 3.3 V, and 2.5 V. The 700 kHz operating
frequency allows small inductor and ceramic capacitors to be
used, providing a compact solution. Current mode control
provides fast and stable line and load transient performance.
The ADP2302/ADP2303 have integrated soft start circuitry to
prevent a large inrush current at power-up. The power-good
signal can be used to sequence devices that have an enable input.
The precision enable threshold voltage allows the part to be
easily sequenced from other input/output supplies. Other key
features include undervoltage lockout (UVLO), overvoltage
protection (OVP), thermal shutdown (TSD), and overcurrent
protection (OCP).
The ADP2302/ADP2303 devices are available in the 8-lead,
SOIC package with exposed paddle and are rated for the −40oC
to +125oC junction temperature range.


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