-
The A5973AD is a step-down monolithic power switching regulator with a minimum switch current limit of 1.8 A, so it is able to deliver up to 1.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to VIN. The high current level is also achieved thanks to an HSOP8 package with an exposed frame, that allows to reduce the Rth(JA)down to approximately 40 °C/W. The device uses an internal P-channel DMOS transistor (with a typical RDS(on)of 250 mΩ) as a switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 500 kHz. Having a minimum input voltage of 4 V only it fits the automotive applications requiring the device operation even in cold crank conditions. A pulse-by-pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.
Key Features
- Qualified following the AEC-Q100 requirements (see PPAP for more details)
- 1.5 A DC output current
- Operating input voltage from 4 V to 36 V
- 3.3 V / (± 2%) reference voltage
- Output voltage adjustable from 1.235 V to VIN
- Low dropout operation: 100% duty cycle
- 500 kHz internally fixed frequency
- Voltage feed-forward
- Zero load current operation
- Internal current limiting
- Inhibit for zero current consumption
- Synchronization
- Protection against feedback disconnection
- Thermal shutdown
Download 
Sample & Buy
| Part Number | Package | Packing Type | Marketing Status | Budgetary Price (US$)* | Quantity | ECCN (US) | Country of Origin | Order from Distributors | Order from ST |
|---|---|---|---|---|---|---|---|---|---|
| A5973AD | PowerSO-8 | Tube | Active | 1.425 | 1000 | EAR99 | CHINA | Check Availability | Buy now |
| A5973ADTR | PowerSO-8 | Tape And Reel | Active | 1.425 | 1000 | EAR99 | CHINA | Check Availability | Get sample |
(*) 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
Featured Videos
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| A5973AD | Active | PowerSO-8 | Automotive | Ecopack2 | |
| A5973ADTR | Active | PowerSO-8 | 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.
