Data Brief AP64500 (Diodes)
| Manufacturer | Diodes |
| Description | 3.8V To 40V, 5A Low Iq Synchronous Buck with Programmable Frequency |
| Pages / Page | 5 / 1 — Request Datasheet. AP64500. 3.8V TO 40V INPUT, 5A LOW IQ SYNCHRONOUS BUCK … |
| File Format / Size | PDF / 352 Kb |
| Document Language | English |
Request Datasheet. AP64500. 3.8V TO 40V INPUT, 5A LOW IQ SYNCHRONOUS BUCK WITH PROGRAMMABLE FREQUENCY. Description
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Request Datasheet AP64500 3.8V TO 40V INPUT, 5A LOW IQ SYNCHRONOUS BUCK WITH PROGRAMMABLE FREQUENCY Description Pin Assignments
The AP64500 is a 5A, synchronous buck converter with a wide input voltage range of 3.8V to 40V. The device fully integrates a 45mΩ high-
TOP VIEW
side power MOSFET and a 20mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.
BST 1 8 SW
The AP64500 device is easily used by minimizing the external component count due to its adoption of peak current mode control.
VIN 2 7 GND
The AP64500 design is optimized for Electromagnetic Interference
EXPOSED PAD
(EMI) reduction. The device has a proprietary gate driver scheme to
9
resist switching node ringing without sacrificing MOSFET turn-on and
EN 3 6 COMP
turn-off times, which reduces high-frequency radiated EMI noise caused by MOSFET switching. AP64500 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
RT/CLK 4 5 FB
frequency for a significant period of time. The device is available in an SO-8EP package.
SO-8EP Features Typical Application Circuit
VIN 3.8V to 40V
INPUT VIN BST
5A Continuous Output Current
C3 L 100nF OUTPUT
0.8V ± 1% Reference Voltage
3.6μH EN SW VOUT 5V
25µA Low Quiescent Current (Pulse Frequency Modulation)
C4 R1 OPEN 115kΩ C1 AP64500
Programmable Switching Frequency: 100kHz to 2.2MHz
FB C2 10µF 3 x 22µF R2
External Clock Synchronization: 100kHz to 2.2MHz
22.1kΩ
Up to 85% Efficiency at 5mA Light Load
RT/CLK COMP RT R5
Proprietary Gate Driver Design for Best EMI Reduction
200kΩ GND 15.8kΩ C6 C5 39pF (Optional)
Frequency Spread Spectrum (FSS) to Reduce EMI
2.7nF
Low-Dropout (LDO) Mode Precision Enable Threshold to Adjust UVLO Protection Circuitry o Undervoltage Lockout (UVLO) VOUT = 5V, L = 3.6μH VOUT = 3.3V, L = 3.3μH o Output Overvoltage Protection (OVP) 100 o Cycle-by-Cycle Peak Current Limit 90 o Thermal Shutdown 80
)
70
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) %(
60
Halogen and Antimony Free. “Green” Device (Note 3) ncy
50
eic
40
iff
30
E
20 10 0 0.001 0.010 0.100 1.000 10.000
IOUT (A)
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. 1 of 5 AP64500 Databrief October 2019
www.diodes.com
© Diodes Incorporated
The AP64500 is a 5A, synchronous buck converter with a wide input voltage range of 3.8V to 40V. The device fully integrates a 45mΩ high-
TOP VIEW
side power MOSFET and a 20mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.
BST 1 8 SW
The AP64500 device is easily used by minimizing the external component count due to its adoption of peak current mode control.
VIN 2 7 GND
The AP64500 design is optimized for Electromagnetic Interference
EXPOSED PAD
(EMI) reduction. The device has a proprietary gate driver scheme to
9
resist switching node ringing without sacrificing MOSFET turn-on and
EN 3 6 COMP
turn-off times, which reduces high-frequency radiated EMI noise caused by MOSFET switching. AP64500 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
RT/CLK 4 5 FB
frequency for a significant period of time. The device is available in an SO-8EP package.
SO-8EP Features Typical Application Circuit
VIN 3.8V to 40V
INPUT VIN BST
5A Continuous Output Current
C3 L 100nF OUTPUT
0.8V ± 1% Reference Voltage
3.6μH EN SW VOUT 5V
25µA Low Quiescent Current (Pulse Frequency Modulation)
C4 R1 OPEN 115kΩ C1 AP64500
Programmable Switching Frequency: 100kHz to 2.2MHz
FB C2 10µF 3 x 22µF R2
External Clock Synchronization: 100kHz to 2.2MHz
22.1kΩ
Up to 85% Efficiency at 5mA Light Load
RT/CLK COMP RT R5
Proprietary Gate Driver Design for Best EMI Reduction
200kΩ GND 15.8kΩ C6 C5 39pF (Optional)
Frequency Spread Spectrum (FSS) to Reduce EMI
2.7nF
Low-Dropout (LDO) Mode Precision Enable Threshold to Adjust UVLO Protection Circuitry o Undervoltage Lockout (UVLO) VOUT = 5V, L = 3.6μH VOUT = 3.3V, L = 3.3μH o Output Overvoltage Protection (OVP) 100 o Cycle-by-Cycle Peak Current Limit 90 o Thermal Shutdown 80
)
70
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) %(
60
Halogen and Antimony Free. “Green” Device (Note 3) ncy
50
eic
40
iff
30
E
20 10 0 0.001 0.010 0.100 1.000 10.000
IOUT (A)
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. 1 of 5 AP64500 Databrief October 2019
www.diodes.com
© Diodes Incorporated
