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reference designAP64352 | Demoboard AP64352SP-EVM

Diodes Incorporated AP64352 | Demoboard AP64352SP-EVM

40V, 3.5A, Low IQ, Synchronous DC-DC Buck Converter with Internal Compensation

Overview

TopologyBuck Converter
Input voltage3.8-40 V
Switching frequency100-2200 kHz
Output 139 V / 3.5 A
IC revision2

Description

The AP64352 is a 3.5A, synchronous buck converter with a wide input voltage range of 3.8V to 40V. The device fully integrates a 75mΩ highside power MOSFET and a 45mΩ low-side power MOSFET to provide high-efficiency stepdown DC-DC conversion. The AP64352 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. The AP64352 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. AP64352 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 an SO-8EP package.

Features

VIN 3.8V to 40V3.5A Continuous Output Current0.8V ± 1% Reference Voltage22µA Low Quiescent Current (Pulse FrequencyModulation)Programmable Switching Frequency: 100kHz to2.2MHzExternal Clock Synchronization: 100kHz to 2.2MHzProgrammable Soft-Start TimeUp to 85% Efficiency at 5mA Light LoadProprietary Gate Driver Design for Best EMIReductionFrequency Spread Spectrum (FSS) to Reduce EMILow-Dropout (LDO) ModePrecision Enable Threshold to Adjust UVLOProtection CircuitryProtection Circuitry

  • Undervoltage Lockout (UVLO)
  • Output Overvoltage Protection (OVP)
  • Cycle-by-Cycle Peak Current Limit
  • Thermal ShutdownTotally Lead-Free & Fully RoHS CompliantHalogen and Antimony Free. “Green” Device

Typical applications

More information

Parts approved by Diodes Incorporated

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
C
Tol. C
VR(V (DC))
Size
Operating Temperature
DF(%)
RISO
Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
Packaging
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
SamplesAvailability & Sample
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885012206065
SPECWCAP-CSGP MLCCs 25 V(DC), 10 nF, ±10%
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 25 V(DC)
Capacitance10 nF
Capacitance±10% 
Rated Voltage25 V (DC)
Size0603 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor3.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Packaging Unit4000 
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885012206095
SPECWCAP-CSGP MLCCs 50 V(DC), 100 nF, ±10%
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance100 nF
Capacitance±10% 
Rated Voltage50 V (DC)
Size0603 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor3 %
Insulation Resistance5 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Packaging Unit4000 
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744325550
SPECWE-HCI SMT Flat Wire High Current Inductor, –, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
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Size1050 
Operating Temperature -40 °C up to +150 °C
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Length10.5 mm
Width10.2 mm
Height4.7 mm
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Inductance5.5 µH
Performance Rated Current12 A
Saturation Current @ 10%4.5 A
Saturation Current @ 30%12 A
DC Resistance10.3 mΩ
Self Resonant Frequency30 MHz
MaterialSuperflux 
Packaging Unit700 
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