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The A6985F automotive grade device is a step-down monolithic switching regulator able to deliver up to 0.5 A DC. The output voltage adjustability ranges from 0.85 V to VIN. The 100% duty cycle capability and the wide input voltage range meet the cold crank and load dump specifications for automotive systems. 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 constant and minimizes the output voltage ripple overload current range, meeting the low noise application specification like car audio. The output voltage supervisor manages the reset phase for any digital load (μC, FPGA). The RST open collector output can also 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 both power elements implements an effective constant current protection.
Key Features
- AEC-Q100 qualified
- 0.5 A DC output current
- 4 V to 38 V operating input voltage
- Low consumption mode or low noise mode
- 30 μA IQat light-load (LCM VOUT = 3.3 V)
- 8 μA IQ-SHTDWN
- Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN
- Adjustable fSW (250 kHz - 2 MHz)
- Embedded output voltage supervisor
- Synchronization
- Adjustable soft-start time
- Internal current limiting
- Overvoltage protection
- Output voltage sequencing
- Peak current mode architecture
- RDSON HS = 360 mΩ, RDSON LS = 150 mΩ
- Thermal shutdown
Featured Videos
Evaluation Tools
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Picture Part number Manufacturer Description 
STEVAL-ISA186V1 ST 38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F5V 
STEVAL-ISA187V1 ST 38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F Part Number38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F5V
38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| A6985F | Active | HTSSOP16 | Automotive | Ecopack1 | |
| A6985F3V3 | Active | HTSSOP16 | Automotive | Ecopack1 | |
| A6985F3V3TR | Active | HTSSOP16 | Automotive | Ecopack1 | |
| A6985F5V | Active | HTSSOP16 | Automotive | Ecopack1 (*) | |
| A6985F5VTR | Active | HTSSOP16 | Automotive | Ecopack1 (*) | |
| A6985FTR | Active | HTSSOP16 | Automotive | Ecopack1 (*) | |
A6985F
Package:
HTSSOP16Material Declaration**:
A6985F5V
Package:
HTSSOP16Material Declaration**:
A6985F5VTR
Package:
HTSSOP16Material Declaration**:
A6985FTR
Package:
HTSSOP16Material Declaration**:
(**) 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.
eDesignSuite
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Package | Packing Type | Marketing Status | ECCN (US) | Country of Origin | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|
| A6985F3V3TR | No availability of distributors reported, please contact our sales office | HTSSOP16 | Tape And Reel | Active | EAR99 | PHILIPPINES | 1.5 / 1k | ||
| A6985FTR | No availability of distributors reported, please contact our sales office | HTSSOP16 | Tape And Reel | Active | EAR99 | PHILIPPINES | 1.5 / 1k | ||
| A6985F | No availability of distributors reported, please contact our sales office | HTSSOP16 | Tube | Active | EAR99 | PHILIPPINES | 1.5 / 1k | ||
| A6985F5VTR | No availability of distributors reported, please contact our sales office | Buy now | HTSSOP16 | Tape And Reel | Active | EAR99 | PHILIPPINES | 1.5 / 1k | |
| A6985F3V3 | No availability of distributors reported, please contact our sales office | HTSSOP16 | Tube | Active | EAR99 | PHILIPPINES | 1.5 / 1k | ||
| A6985F5V | No availability of distributors reported, please contact our sales office | HTSSOP16 | Tube | Active | EAR99 | PHILIPPINES | 1.5 / 1k |
A6985F3V3TR
Package
HTSSOP16Packing Type
Tape And ReelBudgetary Price (US$)*/Qty
1.5 / 1kA6985FTR
Package
HTSSOP16Packing Type
Tape And ReelBudgetary Price (US$)*/Qty
1.5 / 1kA6985F
Package
HTSSOP16Packing Type
TubeBudgetary Price (US$)*/Qty
1.5 / 1kA6985F3V3
Package
HTSSOP16Packing Type
TubeBudgetary Price (US$)*/Qty
1.5 / 1kA6985F5V
Package
HTSSOP16Packing Type
TubeBudgetary Price (US$)*/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
