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The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2A so it is able to deliver more than 1.5 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 SO8 package with exposed frame, that allows to reduce the RthJA down to approximately 40 °C/W.
The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.
An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components.
Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications.
Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.Key Features
- Inhibit for zero current consumption
- Internal current limiting
- Protection against feedback disconnection
- Synchronization
- Thermal shutdown
- Voltage feedforward
- 500 kHz Internally fixed frequency
- 2 A Internal switch
- 3.3 V / (±2 %) reference voltage
- Operating input voltage from 4 V to 36 V
- Low dropout operation: 100 % duty cycle
- Zero load current operation
- Output voltage adjustable from 1.235 V to 35 V
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| 26 Sep 2020 |
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| 04 Dec 2018 |
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| 29 Oct 2015 |
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| 16 Jul 2019 |
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| 23 Mar 2020 |
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L5973AD |
Active
|
PowerSO-8 | Industrial | Ecopack2 | |
| L5973ADTR |
Active
|
PowerSO-8 | Industrial | 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 | |||||||||||
| L5973AD | 9 distributors | Buy now |
Active
|
EAR99 | NEC | Tube | PowerSO-8 | -40 | 150 | PHILIPPINES | 0.991 / 1k | |
| L5973ADTR | 6 distributors | Sample & Buy Buy now |
Active
|
EAR99 | NEC | Tape And Reel | PowerSO-8 | -40 | 150 | PHILIPPINES | 0.991 / 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
