Product overview
Description
The A6983 is an easy-to-use synchronous monolithic step-down regulator capable of delivering up to 3 A DC to the load. The wide input voltage range makes the device suitable for a broad range of applications. The A6983 is based on peak current mode architecture and is packaged in a QFN16 (3 x 3 mm) with internal compensation thus minimizing design complexity and size. The “Low Consumption Mode” (LCM) is designed for applications active during car parking, so it maximizes the efficiency at the light-load with the controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant and minimizes the output voltage ripple overload current range, which meets the low noise application specification, such as for car audio. The A6983 allows the switching frequency to be selected in the 200 kHz to 2.3 MHz range with optional spread spectrum for improved EMC.
The EN pin provides enable/disable functionality. The typical shutdown current is 2 μA when disabled. As soon as the EN pin is pulled-up, the device is enabled, and the internal 1.3 ms soft-start takes place. The A6983 features a Power Good open collector that monitors the FB voltage. Pulse by pulse current sensing on both power elements implements an effective constant current protection, and thermal shutdown prevents thermal run-away.
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All features
- AEC-Q100 qualified
- Operating temperature range: -40 °C to +150 °C for Tj
- 3.5 V to 38 V operating input voltage
- Load dump tolerant up to 40 V
- Output voltage from 0.85 V to VIN
- 3.3 V and 5 V fixed output voltage versions
- 3 A DC output current
- 25 μA operating quiescent current
- Internal compensation network
- Two different versions: LCM for high efficiency at light-loads and LNM for noise-sensitive applications
- 2 μA shutdown current
- Internal soft-start
- High voltage VIN compatible enable
- Output overvoltage protection
- Output voltage sequencing
- Thermal protection
- 200 kHz to 2.3 MHz programmable switching frequency
- Optional spread spectrum for improved EMC
- Power Good
- Synchronization to external clock for LNM devices
- QFN16 (3 x 3 mm) package
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STMicroelectronics - A6983
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All resources
| Resource title | Version | Latest update | Actions | Details | Download |
|---|
SIMPLIS models (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 2025.07 | 08 Jul 2025 | 08 Jul 2025 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| A6983C33QTR | Active Product is in volume production. | QFPN 3X3X0.80 16L PITCH 0.50 | Automotive | Ecopack3 | 10 | 2021-05-19T00:00:00.000+02:00 | |
| A6983C50QTR | Active Product is in volume production. | QFPN 3X3X0.80 16L PITCH 0.50 | Automotive | Ecopack3 | 10 | 2021-05-19T00:00:00.000+02:00 | |
| A6983CQTR | Active Product is in volume production. | QFPN 3X3X0.80 16L PITCH 0.50 | Automotive | Ecopack3 | 10 | 2021-05-19T00:00:00.000+02:00 | |
| A6983N33QTR | Active Product is in volume production. | QFPN 3X3X0.80 16L PITCH 0.50 | Automotive | Ecopack3 | 10 | 2021-05-19T00:00:00.000+02:00 | |
| A6983N50QTR | Active Product is in volume production. | QFPN 3X3X0.80 16L PITCH 0.50 | Automotive | Ecopack3 | 10 | 2021-05-19T00:00:00.000+02:00 | |
| A6983NQTR | Active Product is in volume production. | QFPN 3X3X0.80 16L PITCH 0.50 | Automotive | Ecopack3 | 10 | 2021-05-19T00:00:00.000+02:00 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A6983CQTR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| A6983N33QTR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| A6983C50QTR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| A6983N50QTR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| A6983C33QTR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| A6983NQTR | | | distributors No availability of distributors reported, please contact our sales office |
A6983CQTR Active
A6983N33QTR Active
A6983C50QTR Active
A6983N50QTR Active
A6983C33QTR Active
A6983NQTR Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors