PM6681A STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STMicroelectronics PM6681A is a dual voltage-mode PWM DC-DC controller with 6V to 36V input range, two independently adjustable outputs from 0.9V to 5V and 0.9V to 3.3V, in a 32-pin VFQFPN EP package. Designed for telecom, server, and industrial multi-rail power systems. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 32
- Lifecycle
- OBSOLETE
- Datasheet
- PM6681A Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of PM6681A?
- Dual voltage-mode PWM controller with two independently adjustable output rails: 0.9V–5V and 0.9V–3.3V for multi-rail power design
- Wide 6V–36V input voltage range (nominal 24V) supporting 12V and 24V industrial bus rails in a single IC
- 32-pin VFQFPN EP package with exposed pad for improved thermal performance in high-density power supply layouts
What is PM6681A used for?
The PM6681A dual DC-DC controller is well suited for multi-rail power supply designs in telecom base stations, server boards, and industrial automation equipment that require both a core voltage rail (0.9V–1.8V) and a logic voltage rail (1.8V–3.3V) from a single 24V intermediate bus. Its voltage-mode PWM control with adjustable outputs simplifies feedback network design and allows tight output voltage regulation across the 6V–36V input range.
What are the specifications of PM6681A?
| Manufacturer Package Code | VFQFPN |
| YTEOL | 0 |
| Additional Feature | ALSO OPERATES IN TWO ADJUSTABLE MODE FROM 0.9 V TO 5 V AND 0.9 V TO 3.3 V |
| Analog IC - Other Type | DUAL SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 36V |
| Input Voltage-Min | 6V |
| Input Voltage-Nom | 24V |
| JESD-30 Code | S-XQCC-N32 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.4A |
| Output Voltage-Nom | 5V |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC32,.2SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the PM6681A datasheet?
PM6681A Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for PM6681A?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the PM6681A dual-controller architecture simplify a server board's multi-rail power sequencing compared to two single controllers?
The PM6681A integrates two independent voltage-mode PWM controllers in one 32-pin package, reducing BOM count and PCB area compared to two discrete single-channel controllers. Both channels share a common input bus between 6V and 36V, and each output can be independently set between 0.9V and 5V or 0.9V and 3.3V with external resistors, enabling precise sequenced power-up for FPGA core and I/O rails.
What input voltage range does PM6681A support and which industrial power bus architectures does it fit?
The PM6681A accepts input voltages from 6V to 36V, with a nominal design point of 24V. This range covers both the 12V standard server bus and the 24V industrial intermediate bus, making it versatile for telecom rectifier outputs, battery-backed 24V systems, and 28V avionics buses where a dual-output point-of-load converter is needed.
For a compact telecom line card, how does PM6681A's VFQFPN EP package benefit thermal and space performance?
The 32-pin VFQFPN EP (exposed pad) package transfers heat directly to the PCB ground plane through the thermal pad, achieving lower junction-to-board resistance than a standard QFP. The small QFN footprint — approximately 5 mm × 5 mm — allows dual-rail power delivery in under 30 mm² of board area, which is critical in high-density blade servers and compact telecom cards operating at 24V input.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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