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The B5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.25 A so it is able to deliver up to 2 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an HSOP8 package (i.e. SO8 package with 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 RDSonof 250 mΩ) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus. 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 (temperature Grade 1), see PPAP for more details.
- 2 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 35 V
- Low dropout operation: 100 % duty cycle
- 250 kHz internally fixed frequency
- Voltage feedforward
- Zero load current operation
- Internal current limiting
- Inhibit for zero current consumption
- Synchronization
- Protection against feedback disconnection
- Thermal shutdown
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| 26 Sep 2020 |
26 Sep 2020
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Technical Notes & Articles (1)
| Resource title | Latest update | |||
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| 29 Oct 2015 |
29 Oct 2015
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| 24 Mar 2020 |
24 Mar 2020
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| 23 Mar 2020 |
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| ZIP | 22 Sep 2016 |
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| B5973D |
Active
|
PowerSO-8 | Automotive | Ecopack2 | |
| B5973DTR |
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$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| B5973DTR | 2 distributors | Free Sample Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | PowerSO-8 | -40 | 125 | PHILIPPINES | 1.875 / 1k | |
| B5973D | No availability of distributors reported, please contact our sales office |
Active
|
EAR99 | NEC | Tube | PowerSO-8 | -40 | 125 | PHILIPPINES | 1.875 / 1k | ||
Marketing Status
ActiveECCN (US)
EAR99Budgetary Price (US$)*/Qty
1.875 / 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
