CouponsAPP Download
Assembly Parts LibFor PCBA Only
0Parts Cart
Products
  • In Stock Parts
  • Bom Tool
  • Request a Quote
  • Support
Chat with our live agent for fast reply.
Mon-Fri: 24 hours, Sat: 9am-6pm, GMT+8
Email Us >
Contact us at support@jlcpcb.com
Typically reply within hours.
Help Center >
Get instant answers.
24/7 Available.
Services & Tools
  • Electronic Parts
  • BOM Tool
  • Request a Quote
  • Manufacturers
  • PCB Assembly
Support
  • Contact Us
  • How to Order
  • User Guides
  • Sourcing Tips
  • Payment Methods
Company
  • About Us
  • Quality Assurance
  • How We Work
  • Certifications
  • Security
  • JLCAPI
  • News
  • Cooperation
  • Careers
Electronics
  • EasyEDA
  • JLCPCB
  • JLCDFM
  • LCSC
  • OSHWLAB
Mechanical
  • JLC3DP
  • JLCCNC
  • JLCMC
Download JLCONE Desktop—Get $524 Exclusive Coupons
WindowsMACAndroidIOS
CONNECT WITH US
Services & Tools
Electronic PartsBOM ToolRequest a QuoteManufacturersPCB Assembly
Support
Contact UsHow to OrderUser GuidesSourcing TipsPayment Methods
Company
About UsQuality AssuranceHow We WorkCertificationsSecurityJLCAPINewsCooperationCareers
Electronics
EasyEDAJLCPCBJLCDFMLCSCOSHWLAB
Mechanical
JLC3DPJLCCNCJLCMC

Download JLCONE Desktop—Get $524 Exclusive Coupons

WindowsMAC
AndroidIOS

CONNECT WITH US

© 2026 JLCPCB.COM All Rights Reserved.Privacy PolicyTerms & ConditionsCookies Policy
  1. JLCPCB
  2. Parts Library
  3. All Components
  4. Power Management (PMIC)
  5. DC-DC Converters
  6. FAN21SV04EMPX
FAN21SV04EMPX
Extended
* Images are for reference only

FAN21SV04EMPX

Attributes
Value
Manufacturer
onsemi
MFR.Part #
FAN21SV04EMPX
JLCPCB Part #
C890646
Package
WQFN-25(5x6)
Description
-40℃~+85℃ 1 200kHz~600kHz 3V~24V 4A Adjustable Buck Buck Built-in Yes WQFN-25(5x6) DC-DC Converters ROHS
EasyEDA Libraries
ECCN
EAR99
Datasheet
Download
Source
JLCPCB
Assembly Type
SMT Assembly
PCBA Type
Economic and Standard

Note: The purchased components are stored in your JLCPCB parts library for future PCBA orders only, and cannot be shipped separately.

AttributesValue
CategoryPower Management (PMIC)/DC-DC Converters
Manufactureronsemi
PackageWQFN-25(5x6)
Operating Temperature-40℃~+85℃
FunctionStep-down type
Synchronous RectifierYes
Frequency - Switching200kHz~600kHz
Voltage - Supply3V~24V
Output TypeAdjustable
Output Current4A
Quiescent Current4mA
FeaturesOvercurrent Protection、Protection latch、Operating status indication、Cycle-by-cycle current limiting、Adjustable current limiting、Frequency synchronization、External compensation、Built-in LDO regulator
Switch tube (built-in/external)Built-in
TopologyBuck
Number of Outputs1
Results remaining: 0

  1. JLCPCB
  2. Parts Library
  3. All Components
  4. Power Management (PMIC)
  5. DC-DC Converters
  6. FAN21SV04EMPX
FAN21SV04EMPX

* Images are for reference only

FAN21SV04EMPX

Extended
Manufacturer

onsemi

MFR.Part #
FAN21SV04EMPX
JLCPCB Part #
C890646
Package
WQFN-25(5x6)
Description
-40℃~+85℃ 1 200kHz~600kHz 3V~24V 4A Adjustable Buck Buck Built-in Yes WQFN-25(5x6) DC-DC Converters ROHS
EasyEDA Libraries
ECCN
EAR99
Datasheet
Download
Source
JLCPCB
Assembly Type
SMT Assembly
PCBA Type
Economic and Standard

Note: The purchased components are stored in your JLCPCB parts library for future PCBA orders only, and cannot be shipped separately.

FAN21SV04EMPX

* Images are for reference only

FAN21SV04EMPX

Extended
Manufacturer

onsemi

MFR.Part #
FAN21SV04EMPX
JLCPCB Part #
C890646
Package
WQFN-25(5x6)
Description
-40℃~+85℃ 1 200kHz~600kHz 3V~24V 4A Adjustable Buck Buck Built-in Yes WQFN-25(5x6) DC-DC Converters ROHS
EasyEDA Libraries
ECCN
EAR99
Datasheet
Download
Source
JLCPCB
Assembly Type
SMT Assembly
PCBA Type
Economic and Standard

Note: The purchased components are stored in your JLCPCB parts library for future PCBA orders only, and cannot be shipped separately.

FAN21SV04EMPX Specifications

FAN21SV04EMPX technical specifications, attributes, and parameters.

AttributesValue
CategoryPower Management (PMIC)/DC-DC Converters
Manufactureronsemi
PackageWQFN-25(5x6)
Operating Temperature-40℃~+85℃
FunctionStep-down type
Synchronous RectifierYes
Frequency - Switching200kHz~600kHz
Voltage - Supply3V~24V
Output TypeAdjustable
Output Current4A
Quiescent Current4mA
FeaturesOvercurrent Protection、Protection latch、Operating status indication、Cycle-by-cycle current limiting、Adjustable current limiting、Frequency synchronization、External compensation、Built-in LDO regulator
Switch tube (built-in/external)Built-in
TopologyBuck
Number of Outputs1
Results remaining: 0

PCB Assembly Tips

From components to fully assembled PCBs. JLCPCB supports PCB assembly for the FAN21SV04EMPX. Sign up to receive and start your assembly today →

  • 1

    Step 1 - Pre-order the parts you need from JLCPCB.

  • 2

    Step 2 - Place a PCBA order to have those parts assembled onto your boards.

  • 3

    Step 3 - JLCPCB manufactures and assembles your boards in as fast as 3 days.

JLCPCB Assembly Tutorial
Learn more about JLCPCB Assembly

FAN21SV04EMPX Schematic Symbol & PCB Footprint

The FAN21SV04EMPX schematic symbol and PCB footprint are available in the EasyEDA PCB design tool.