PAC1934-I/JQ Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
Microchip PAC1934-I/JQ is a quad high-side current and power monitor with I2C/SMBus interface, supporting up to 32 V rails. It features an on-chip accumulator for accurate energy measurement. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 17
- Lifecycle
- ACTIVE
- Datasheet
- PAC1934-I/JQ Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of PAC1934-I/JQ?
- Quad-channel high-side current sensing up to 32 V rails with 16-bit resolution per channel
- Integrated energy accumulator enables real-time power and energy measurement without external MCU overhead
- I2C/SMBus interface with configurable address supports up to 4 devices on a single bus
What is PAC1934-I/JQ used for?
The PAC1934-I/JQ is well-suited for power management in servers, telecommunications equipment, and industrial controllers where monitoring multiple power rails simultaneously is critical. Its quad-channel architecture and accumulator make it ideal for battery-powered IoT nodes and portable instruments that require accurate energy accounting. System designers also deploy it in data center power distribution units to track per-rail consumption over time.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the PAC1934-I/JQ datasheet?
PAC1934-I/JQ Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for PAC1934-I/JQ?
Compatible alternatives and drop-in replacements for PAC1934-I/JQ:
Frequently Asked Questions
What voltage rails can the PAC1934-I/JQ monitor simultaneously?
The PAC1934-I/JQ can monitor up to 4 independent high-side current channels on rails up to 32 V. Each channel delivers 16-bit resolution measurements, and all four channels can be sampled concurrently, making it practical for multi-rail power systems in servers and industrial equipment.
How does the on-chip accumulator benefit energy-sensitive designs?
The integrated accumulator continuously sums power readings over time, providing accurate energy totals in watt-hours without constant MCU intervention. This reduces firmware overhead and improves measurement accuracy, especially over long intervals such as 24-hour or multi-day battery life assessments at supply voltages from 2.7 V to 5.5 V.
When would a designer choose PAC1934-I/JQ over a single-channel monitor like PAC1921?
PAC1934-I/JQ is the better choice when a design needs 4 independent current-sense channels in a single 16-pin QFN package rather than four discrete single-channel ICs. This reduces BOM count, PCB area, and I2C bus addresses used. It is particularly advantageous in space-constrained multi-rail platforms running at 3.3 V, 5 V, 12 V, and 48 V simultaneously.
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