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QFN-28
QFN-28
The QFN-28 (Quad Flat No-leads) is a surface-mount package designed for high-density circuits. Featuring a leadless design, an exposed thermal pad, and an ultra-thin profile, it delivers superior heat dissipation and reduced signal interference. Typical dimensions are a 5×5 mm body with a 0.5 mm pin pitch and a 1 mm height, making it ideal for power management ICs in portable devices, IoT sensor modules, and compact consumer electronics. Its bottom-terminal contacts enable direct PCB thermal transfer, while RoHS-compliant materials ensure reliability in industrial environments.
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4.7V~36V QFN-28 Motor Driver ICs ROHS
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 6340
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4.7V~36V QFN-28 Motor Driver ICs ROHS
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 7428
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USB change UART QFN-28 USB ICs ROHS
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 5086
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1KB 16KB 2.3V~5.5V 16MHz MTP 26 QFN-28 Microcontroller Units (MCUs/MPUs/SOCs) ROHS
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 4989
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32KB 4KB FLASH 23 CM3 48MHz QFN-28 Microcontroller Units (MCUs/MPUs/SOCs) ROHS
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 6946
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64KB 8KB FLASH 24 CM4 108MHz QFN-28 Microcontroller Units (MCUs/MPUs/SOCs) ROHS
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 2685
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32KB 6KB FLASH 24 CM4 108MHz QFN-28 Microcontroller Units (MCUs/MPUs/SOCs) ROHS
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 4798
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Up-Down Converters 10-15.4GHz NF 2.5dB Gain 14dB
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 6025
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Audio D/A Converter ICs Sabre 32 Ultra Stereo low power audiophile DAC
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 7065
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Audio D/A Converter ICs Sabre 32 Premier Stereo low power audiophile DAC
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 5832
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USB Interface IC USB to UART Bridge QFN28
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 1221
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2x Ideal Diode-OR & 1x Hot Swap Cntr w/
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 500
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 50
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 20
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 5
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
1
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ISL78419ARZ Integrated Automotive TFT-LCD Power Supply Regul HT SUSA CODE:8542390000
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 874
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RF Transceiver FSK/OOK 28-Pin QFN EP T/R
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 27
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8051 C8051F36x Microcontroller IC 8Bit 50MHz 16KB (16K x 8) FLASH 28-QFN (5x5)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 251
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8051 C8051F36x Microcontroller IC 8Bit 50MHz 32KB (32K x 8) FLASH 28-QFN (5x5)
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1 + 10 + 25 + 50 + >=100 -
In-stock : 1
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8051 C8051F36x Microcontroller IC 8Bit 100MHz 32KB (32K x 8) FLASH 28-QFN (5x5)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 203
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8 Bit MCU, C8051 Family C8051F36x Series Microcontrollers, 100 MHz, 32 KB, 1 KB, 28 Pins, QFN
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 796
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Interface Bridges, USB to UART, 4.4 V, 5.25 V, QFN, 28 Pins, -40 °C
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 7474
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Worldwide Digital and Analog TV Tuner
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 1289
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 2562
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TOUCH BUTTON CONTROLLER ; HT SUSA CODE:8542390000
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 6081
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Lithium Thionyl Chloride Cylindrical 3.6V 1Ah 2/3AA Primary
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 1827
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Multiplexer/Demultiplexer Bus Switch 1Element CMOS 8IN 16Pin QSOP Tube
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 18527
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 2024
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 1015
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 1360
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Dual, 4A/2A, 4MHz, Step-Down DC-DCRegulator with Tracking/Sequencing Capability
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 980
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IC REG BUCK ADJ 6A DL 28QFN
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 209
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 75
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 860
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 2416
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 982
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28V, 6A Hyper Speed Control Synchronous DC/DC Buck Regulator
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 469
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 5000
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IC LED DRIVER SYNC 40V 2A 28 QFN
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 294
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 1056
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IC LED DRIVER SYNC 40V 2A 28 QFN
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 226
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FUSE CLIP CARTRIDGE 250V 10A PCB
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1 + 10 + 25 + 50 + >=100 -
In-stock : 1
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Integrated Circuits (ICs)
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1 + 10 + 25 + 50 + >=100 -
1
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Switching Battery Charger Li-Ion 0V to 60V Automotive 28-Pin QFN EP Tube
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 287
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2-22GHz LNA with AGC
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1 + 10 + 25 + 50 + >=100 -
In-stock : 1
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Full Speed Basic USB Type-C Controller USB 2.0 3.3V T/R Automotive 28-Pin QFN EP
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 5000
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8 Bit MCU, EFM8 Family EFM8BB Series Microcontrollers, 50 MHz, 16 KB, 2.25 KB, 28 Pins, QFN
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 11
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RF TRANSCEIVER, 1.05GHZ, -40 TO 85DEG C New
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 5000
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DC/DC Switching Regulators 19V/9A HLL DC-DC Buck Regulator
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1 + 10 + 25 + 50 + >=100 -
Minimum : 1 In-stock : 140
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Q:What defines the physical structure of QFN-28?
A:Key features include:
- Leadless bottom-mounted pads for compact PCB footprint.
- Central thermal pad (70% coverage of package base) for enhanced heat dissipation.
- 28-pin layout with perimeter pad arrangement.
- 0.9 mm ultra-thin profile for space-constrained designs. -
Q:Why choose QFN-28 over alternatives?
A:Critical advantages:
- Miniaturization: 40% smaller than equivalent SOIC packages.
- Thermal Performance: Direct PCB heat path via exposed thermal pad.
- Electrical Benefits: Low-inductance design (<0.5 nH) for high-frequency applications.
- Reliability: Moisture-resistant substrate (MSL3 rating). -
Q:What are common technical specs?
A:Standard configurations (consult datasheets):
- Body Size: 5×5 mm.
- Height: 0.9 mm.
- Pin Pitch: 0.5 mm.
- Material: Copper-alloy leads with Ni/Pd/Au plating.
- Temp Range: -40°C to +125°C. -
Q:Where is QFN-28 typically applied?
A:Dominant use cases:
- Power Converters: e.g., Buck/boost ICs (e.g., TPS62130).
- RF Modules: e.g., Bluetooth/Wi-Fi transceivers (e.g., CC2541).
- Sensor Interfaces: e.g., MEMS accelerometers (e.g., LIS3DH). -
Q:What are critical assembly guidelines?
A:Key recommendations:
- PCB Design: Thermal vias under pad (minimum 4×4 array).
- Solder Paste: Type 4 solder recommended for fine-pitch pads.
- Reflow Profile: Peak temp ≤ 245°C (Pb-free process).
- Inspection: X-ray (AXI) mandatory for void detection.