Analog Devices ADP1877 Evaluation Board ADP1877HC-EVALZ ADP1877HC-EVALZ Data Sheet
Product codes
ADP1877HC-EVALZ
Evaluation Board for
Step-Down DC-to-DC Controller
ADP1877HC-EVALZ
Rev. A
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are 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
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 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
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Tel: 781.329.4700
Fax: 781.461.3113
©2009-2010 Analog Devices, Inc. All rights reserved.
FEATURES
Input range: 6 V to 14 V
Two output voltages: 1.8 V and 1.05 V
Output current: 13 A per channel
Switching frequency: 600 kHz
Operate in PWM or PSM
Compact, low cost, and efficient design
Two output voltages: 1.8 V and 1.05 V
Output current: 13 A per channel
Switching frequency: 600 kHz
Operate in PWM or PSM
Compact, low cost, and efficient design
EVALUATION BOARD DESCRIPTION
This data sheet describes the design, operation, and test results
of the ADP1877 13 A evaluation board. The input range for this
evaluation board is 6 V to 14 V, and the two regulated output
voltages are set to 1.8 V and 1.05V, each with a maximum load
current of 13 A. A switching frequency (f
of the ADP1877 13 A evaluation board. The input range for this
evaluation board is 6 V to 14 V, and the two regulated output
voltages are set to 1.8 V and 1.05V, each with a maximum load
current of 13 A. A switching frequency (f
SW
) of 600 kHz achieves
a good balance between efficiency and the sizes of the power
components.
components.
ADP1877 DEVICE DESCRIPTION
The ADP1877 is a Flexmode® (proprietary architecture of
Analog Devices, Inc.), dual-channel, step-down switching
Analog Devices, Inc.), dual-channel, step-down switching
controller with integrated drivers that drive N-channel
synchronous power MOSFETs. The two PWM outputs are
phase shifted 180°, which reduces the input rms current, thus
minimizing required input capacitance.
The boost diodes are built into the ADP1877, thus lowering the
overall system cost and component count. The ADP1877 can be
set to operate in pulse skip high efficiency mode under light
loads or in PWM continuous conduction mode.
The ADP1877 includes externally adjustable soft start, output
overvoltage protection, externally adjustable current limit,
power good, a tracking function, and a programmable oscillator
frequency that ranges from 200 kHz to 1.5 MHz. The ADP1877
provides an output voltage accuracy of ±1% over temperature.
This part can be powered from a 2.75 V to 14.5 V supply,
operates over the −40°C to +125°C junction temperature range
and is available in a 32-lead 5 mm × 5 mm LFCSP package.
synchronous power MOSFETs. The two PWM outputs are
phase shifted 180°, which reduces the input rms current, thus
minimizing required input capacitance.
The boost diodes are built into the ADP1877, thus lowering the
overall system cost and component count. The ADP1877 can be
set to operate in pulse skip high efficiency mode under light
loads or in PWM continuous conduction mode.
The ADP1877 includes externally adjustable soft start, output
overvoltage protection, externally adjustable current limit,
power good, a tracking function, and a programmable oscillator
frequency that ranges from 200 kHz to 1.5 MHz. The ADP1877
provides an output voltage accuracy of ±1% over temperature.
This part can be powered from a 2.75 V to 14.5 V supply,
operates over the −40°C to +125°C junction temperature range
and is available in a 32-lead 5 mm × 5 mm LFCSP package.
ADP1877
GND
TERMINAL
VIN
TERMINAL
VOUT1 TERMINAL
VOUT2 TERMINAL
GND TERMINALS
08460-
001
Figure 1. ADP1877HC Evaluation Board