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AP63205 Datasheet

2A LOW IQ SYNCHRONOUS BUCK

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AP63200/AP63201/AP63203/AP63205
3.8V TO 32V INPUT, 2A LOW IQ SYNCHRONOUS BUCK WITH ENHANCED EMI REDUCTION
Description
The AP63200/AP63201/AP63203/AP63205 is a 2A, synchronous
buck converter with a wide input voltage range of 3.8V to 32V and
fully integrates a 125mΩ high-side power MOSFET and a 68mΩ low-
side power MOSFET to provide high-efficiency step-down DC/DC
conversion.
The AP63200/AP63201/AP63203/AP63205 device is easily used by
minimizing the external component count due to its adoption of peak
current mode control along with its integrated compensation network.
The AP63200/AP63201/AP63203/AP63205 has optimized designs for
Electromagnetic Interference (EMI) reduction. The converter 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. It also has a proprietary
gate driver scheme to resist switching node ringing without sacrificing
MOSFET turn-on and turn-off times, which further erases high-
frequency radiated EMI noise caused by MOSFET switching.
Pin Assignments
TOP VIEW
FB 1
EN 2
VIN 3
TSOT26
6 BST
5 SW
4 GND
The device is available in a low-profile, TSOT26 package.
Features
VIN 3.8V to 32V
2A Continuous Output Current
0.8V ± 1% Reference Voltage
22µA Ultralow Quiescent Current
Switching Frequency
o 500kHz: AP63200 and AP63201
o 1.1MHz: AP63203 and AP63205
Pulse Width Modulation (PWM) Regardless of Output Load
o AP63201
Supports Pulse Frequency Modulation (PFM)
o AP63200, AP63203, and AP63205
o Up to 80% Efficiency at 1mA Light Load
o Up to 88% Efficiency at 5mA Light Load
Fixed Output Voltage
o 3.3V: AP63203
o 5.0V: AP63205
Proprietary Gate Driver Design for Best EMI Reduction
Frequency Spread Spectrum (FSS) to Reduce EMI
Precision Enable Threshold to Adjust UVLO
Protection Circuitry
o Overvoltage Protection
o Cycle-by-Cycle Peak Current Limit
o Thermal Shutdown
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
12V and 24V Distributed Power Bus Supplies
Flat Screen TV Sets and Monitors
Power Tools and Laser Printers
White Goods and Small Home Appliances
FPGA, DSP, and ASIC Supplies
Home Audio
Network Systems
Set Top Boxes
Gaming Consoles
Consumer Electronics
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP63200/AP63201/AP63203/AP63205
Document number: DS41326 Rev. 2 - 2
1 of 18
www.diodes.com
January 2019
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AP63205 Datasheet

2A LOW IQ SYNCHRONOUS BUCK

No Preview Available !

Typical Application Circuit
INPUT
C1
10μF
36
VIN BST
5
2
EN
AP63205 SW
1
FB
4
GND
AP63200/AP63201/AP63203/AP63205
C3
100nF
L
4.7µH
OUTPUT
VOU T
5V
C2
2x22μF
Figure 1. Typical Application Circuit
Figure 2. Efficiency vs. Output Current
Pin Descriptions
Pin Number
1
2
3
4
5
6
Pin Name
Function
FB
EN
VIN
GND
SW
BST
Feedback sensing terminal for the output voltage. Connect this pin to the resistive divider of the output.
See Setting the Output Voltage section for more details.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator and low
to turn it off. Attach to VIN or leave open for automatic startup. The EN has a precision threshold of 1.18V for
programing the UVLO. See Enable section for more details.
Power Input. VIN supplies the power to the IC, as well as the step-down converter switches. Drive VIN with a
3.8V to 32V power source. Bypass VIN to GND with a suitably large capacitor to eliminate noise due to the
switching of the IC. See Input Capacitor section for more details.
Power Ground.
Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC filter
from SW to the output load. Note that a capacitor is required from SW to BST to power the high-side switch.
High-Side Gate Drive Boost Input. BST supplies the drive for the high-side N-Channel MOSFET. A 100nF
capacitor is recommended from SW to BST to power the high-side switch.
AP63200/AP63201/AP63203/AP63205
Document number: DS41326 Rev. 2 - 2
2 of 18
www.diodes.com
January 2019
© Diodes Incorporated


Part Number AP63205
Description 2A LOW IQ SYNCHRONOUS BUCK
Maker Diodes
Total Page 18 Pages
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