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The A6984 is a step-down monolithic switching regulator able to deliver up to 400 mA DC. The output voltage adjustability ranges from 0.9 V. The fixed 3.3 V VOUT requires no external resistor divider. The “low consumption mode” (LCM) is designed for applications active during car parking, so it maximizes the efficiency at light load with controlled output voltage ripple. The “low noise mode” (LNM) makes the switching frequency almost constant over the load current range, serving low noise application specifications such as car audio/sensors. The PGOOD open collector output can implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium-heavy load, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing on the low-side power element implements effective constant current protection. The package lead finishing guarantees side solderability, thus allowing visual inspection during manufacturing.
Key Features
- AEC-Q100 qualified
- 400 mA DC output current
- 4.5 V to 36 V operating input voltage
- Synchronous rectification
- Low consumption mode or low noise mode
- 75 µA IQ at light load (LCM VOUT = 3.3 V)
- 13 µA IQ-SHTDWN
- Adjustable fSW (250 kHz - 600 kHz)
- Output voltage adjustable from 0.9 V
- No resistor divider required for 3.3 V VOUT
- VBIAS maximizes efficiency at light load
- 350 mA valley current limit
- Constant on-time control scheme
- PGOOD open collector
- Thermal shutdown
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Product Specifications (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 25 Sep 2020 |
25 Sep 2020
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Technical Notes & Articles (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 29 Oct 2015 |
29 Oct 2015
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Brochures (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 23 Mar 2020 |
23 Mar 2020
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CAD/EDA Symbols, Footprints and Models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| A6984TR |
Active
|
VFDFPN 4X4X1.0 10L PITCH 0.50 | Automotive | Ecopack2 |
(**) 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.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Marketing Status | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| A6984TR | 1 distributors |
Active
|
EAR99 | NEC | Tape And Reel | VFDFPN 4X4X1.0 10L PITCH 0.50 | - | - | THAILAND | 1.5 / 1k | ||
Marketing Status
ActiveECCN (US)
EAR99Budgetary Price (US$)*/Qty
1.5 / 1k(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
