UG-179 Datasheet, PDF (1/12 Pages) Analog Devices – Automatic PFM/PWM mode switching

Evaluation Board User Guide
UG-179
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: [phone] • Fax: [phone] • www.analog.com
Evaluation Board for the 1.2 A, 20 V Nonsynchronous Step-Down Regulators
FEATURES
1.2 A maximum load current
±2% output accuracy over temperature range
Wide input voltage range: 3.0 V to 20 V
Output voltage from 0.8 V to 0.85 × VIN
700 kHz (ADP2300) or 1.4 MHz (ADP2301) switching
frequency options
Automatic PFM/PWM mode switching
Precision enable pin with hysteresis
Integrated high-side MOSFET
Integrated bootstrap diode
ADIsimPower™ online design tool
Available in ultrasmall, 6-lead TSOT package
GENERAL DESCRIPTION
The ADP2300/ADP2301 are compact, constant-frequency, current-
mode, step-down dc-to-dc regulators with an integrated power
MOSFET. The ADP2300/ADP2301 evaluation boards are complete
solutions that allow the user to evaluate the performance of the
regulators. There are two frequency options available: the ADP2300
runs at 700 kHz, and the ADP2301 runs at 1.4 MHz. These options
allow the user to make design decisions based on the trade-off
between efficiency and the size of the total solution.
The ADP2300/ADP2301 provide accurate (±2%) output regulation
for load currents up to 1.2 A. Current-mode control provides fast
and stable line and load transient performance. The precision,
EN pin, threshold voltage allows the ADP2300/ADP2301 to be
sequenced from other input/output supplies. The EN pin can also
be used as a programmable UVLO input by using a resistive divider.
DEMONSTRATION BOARD
Figure 1.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
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