A5973D
A5973D is 2.5A switch step down switching regulator manufactured by STMicroelectronics.
Description
Features
- Qualified following the AEC-Q100 requirements (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 k Hz internally fixed frequency
- Voltage feedforward
- Zero load current operation
- Internal current limiting
- Inhibit for zero current consumption
The A5973D 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 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 RDS(on) of 250 mΩ) as switching element to minimize the size of the external ponents. An internal oscillator fixes the switching frequency at 250 k Hz. 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.
- Synchronization
- Protection against feedback disconnection
- Thermal shutdown
Figure 1. Application schematic
November 2015
This is information on a product in full production.
Doc ID13957 Rev 9
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Contents
Contents
Pin settings
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1.1 Pin connection
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1.2 Pin description
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