Analog Devices ADP2105 Evaluation Board ADP2105-EVALZ ADP2105-EVALZ Data Sheet
Product codes
ADP2105-EVALZ
Evaluation Board for Step-Down DC-to-DC
Converter Solution
EVAL-ADP2105
FEATURES
Efficiency >95%
Input voltage range: 2.7 V to 5.5 V
Output voltage range: 0.8 V to V
Input voltage range: 2.7 V to 5.5 V
Output voltage range: 0.8 V to V
IN
Maximum output current: 1.0 A
Switching frequency: 1.2 MHz
Quiescent current: 20 μA
Shutdown current: 0.1 μA
Enable/shutdown logic input
Optimized for small ferrite core inductors
Optimized for tiny ceramic input and output capacitors
Programmable soft start with single capacitor
Programmable compensation for optimizing transient
Switching frequency: 1.2 MHz
Quiescent current: 20 μA
Shutdown current: 0.1 μA
Enable/shutdown logic input
Optimized for small ferrite core inductors
Optimized for tiny ceramic input and output capacitors
Programmable soft start with single capacitor
Programmable compensation for optimizing transient
performance
GENERAL DESCRIPTION
The ADP2105 evaluation board is a complete step-down dc-to-dc
converter solution using the ADP2105 step-down dc-to-dc
converter. It provides a ±1% accurate (±3% over all conditions)
regulated output voltage with load currents up to 1 A. It comes
in two versions: the ADP2105-1.8-EVAL with fixed output
voltage of 1.8 V and the ADP2105-EVAL with adjustable output
voltage initially set to 2.5 V.
converter solution using the ADP2105 step-down dc-to-dc
converter. It provides a ±1% accurate (±3% over all conditions)
regulated output voltage with load currents up to 1 A. It comes
in two versions: the ADP2105-1.8-EVAL with fixed output
voltage of 1.8 V and the ADP2105-EVAL with adjustable output
voltage initially set to 2.5 V.
The ADP2105 is a synchronous, step-down dc-to-dc converter
that uses a current-mode pulse width modulation (PWM)
control scheme at medium-to-heavy load currents for high
efficiency and smoothly transitions to a pulse frequency
modulation (PFM) mode at light loads to conserve power.
The power switch and synchronous rectifier are integrated for
minimal external part count and high efficiency. The ADP2105
is optimized for operation with small ferrite core inductors and
tiny ceramic capacitors to deliver the maximum output power
per square inch of the PCB board area.
that uses a current-mode pulse width modulation (PWM)
control scheme at medium-to-heavy load currents for high
efficiency and smoothly transitions to a pulse frequency
modulation (PFM) mode at light loads to conserve power.
The power switch and synchronous rectifier are integrated for
minimal external part count and high efficiency. The ADP2105
is optimized for operation with small ferrite core inductors and
tiny ceramic capacitors to deliver the maximum output power
per square inch of the PCB board area.
For more details, see the
data sheet.
FUNCTIONAL BLOCK DIAGRAM
GND
GN
D
ADP2105
VOUT
C2
C5
C6
R1
R4
R3
R5
C7
C3
L1
C4
ENABLE
R2
J1
VIN
C1
ANALOG DEVICES, POWER MANAGEMENT (STP)
ADP2105 EVALUATION BOARD
V
OUT
:
06
31
2-
0
01
Figure 1.
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
Evaluation boards are not authorized to be used in life support devices or systems.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards as supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
Evaluation boards as supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
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