L7985
2A step-down switching regulator-
Active
The L7985/A is a step-down switching regulator with 2.5 A (minimum) current limited embedded power MOSFET, so it is able to deliver up to 2 A current to the load depending on the application conditions.
The input voltage can range from 4.5 V to 38 V, while the output voltage can be set starting from 0.6 V to VIN.
Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz.
The QFN and the HSOP packages with exposed pad allow reducing the RthJA down to 60 °C/W and 40 °C/W respectively.
Download
Datasheet
Key Features
- 2 A DC output current
- 4.5 V to 38 V input voltage
- Output voltage adjustable from 0.6 V
- 250 KHz switching frequency, programmable up to 1 MHz
- Internal soft-start and enable
- Low dropout operation: 100% duty cycle
- Voltage feed-forward
- Zero load current operation
- Overcurrent and thermal protection
- VFQFPN3x3-10L and HSOP8 package
Design Resources
TopTechnical Documentation
Product Specifications
| Description | Version | Size |
|---|---|---|
DS8733: 2 A step-down switching regulator
|
3.0 | 847 KB |
Design Notes & Tips
| Description | Version | Size |
|---|---|---|
|
DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration
|
1.0 | 359 KB |
Related Tools and Software
Related Tools and Software
| Part Number | Description |
|---|---|
| STEVAL-ISA097V1 | 2 A step-down switching demonstration board based on the L7985 in DFN10 package |
| STEVAL-ISA098V1 | 2 A step-down switching demonstration board based on the L7985A in HSOP8 package |
Sample & Buy
Top| Part Number | Marketing Status | Package | Packing Type | Automotive Grade | Order From ST | Unit Price (US$)* @ 1000 | Distributor Availability | RoHS Compliance Grade | Download Material Declaration** |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L7985 | Active | VDFPN 10 3x3x1.0 | Tube | _ | - | .63 | No data reported, please contact our Distributors | Ecopack2 | PDF XML | ||||||||||
| L7985A | Active | PowerSO-8 | Tube | _ | - | .664 | No data reported, please contact our Distributors | Ecopack2 | PDF XML | ||||||||||
| L7985ATR | Active | PowerSO-8 | Tape And Reel | _ | - | .664 | No data reported, please contact our Distributors | Ecopack2 | PDF XML | ||||||||||
| L7985TR | Active | VDFPN 10 3x3x1.0 | Tape And Reel | _ | .63 |
| Ecopack2 | PDF XML | |||||||||||
(*) 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 (**) 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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