AP63300/1-EVM
3.8V TO 32V INPUT, 3A LOW IQ SYNCHRONOUS BUCK WITH
ENCHANCED EMI REDUCTION
AP63300/AP63301
Document number: DS42002 Rev. 3 - 2
1 of 11
September 2019
© Diodes Incorporated
DESCRIPTION
The AP63300/AP63301 is 3A, synchronous buck
converter with a wide input voltage range of 3.8V
to 32V. The device fully integrates a 75
mΩ high-
side power MOSFET and a 40
mΩ low-side power
MOSFET to provide high-efficiency step-down DC-
DC conversion.
The AP63300/AP63301 device is easily used by
minimizing the external component count due to its
adoption of peak current mode control along with
its integrated loop compensation network.
FEATURES
VIN 3.8V to 32V
3A Continuous Output Current
0.8V ± 1% Reference Voltage
22µA Ultralow Quiescent Current (Pulse
Frequency Modulation)
500kHz Switching Frequency
Supports Pulse Frequency Modulation (PFM)
o
AP63300
o
Up to 88% Efficiency at 5mA Light Load
Pulse Width Modulation (PWM) Regardless of
Output Load
o
AP63301
Proprietary Gate Driver Design for Best EMI
Reduction
The AP63300/AP63301 design is optimized for
Electromagnetic Interference (EMI) reduction. The
device has a proprietary gate driver scheme to
resist switching node ringing without sacrificing
MOSFET turn-on and turn-off times, which reduces
high-frequency radiated EMI noise caused by
MOSFET
switching.
AP63300
also
features
Frequency Spread Spectrum (FSS) with a switching
frequency jitter of ±6%, which reduces EMI by not
allowing emitted energy to stay in any one
frequency for a significant period of time.
The device is available in a TSOT26 package.
Frequency Spread Spectrum (FSS) to Reduce
EMI
o
AP63300
Low-Dropout (LDO) Mode
Precision Enable Threshold to Adjust UVLO
Protection Circuitry
o
Undervoltage Lockout (UVLO)
o
Output Overvoltage Protection (OVP)
o
Cycle-by-Cycle Peak Current Limit
o
Thermal Shutdown
