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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
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Product Specifications (1)
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| 10 Oct 2020 |
10 Oct 2020
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Technical Notes & Articles (1)
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| 29 Oct 2015 |
29 Oct 2015
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| 24 Mar 2020 |
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| 12 Sep 2015 |
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| 23 Mar 2020 |
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EDA Symbols, Footprints and 3D Models
STMicroelectronics - A5973AD
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
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HW Model, CAD Libraries & SVD (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| ZIP | 22 Sep 2016 |
22 Sep 2016
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Quality and Reliability
| 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.
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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$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| A5973AD | 1 distributors | Buy Direct |
Active
|
EAR99 | NEC | Tube | PowerSO-8 | -40 | 125 | PHILIPPINES | 1.425 / 1k | |
| A5973ADTR | 2 distributors |
Active
|
EAR99 | NEC | Tape And Reel | PowerSO-8 | -40 | 125 | PHILIPPINES | 1.425 / 1k | ||
Marketing Status
ActiveECCN (US)
EAR99Budgetary Price (US$)*/Qty
1.425 / 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
