L5964 is a dual step-down switching regulator with internal power switches and a low drop-out linear/standby regulator. All the regulators have independent supply voltages, enables, power goods and thermal protections.
The switching regulators have selectable voltage supervisors and power goods, and selectable current limits. The LDO has power good and fixed current limitation.
The two DC-DC converters can work in free-run condition, with frequency selectable between two values, 250 kHz or 2 MHz, or synchronize themselves to an external clock (SYNCIN pin). They are 180° out of phase, while the synchronization output signal (SYNCOUT pin) is 90° out of phase with the first regulator. The phase shift simplifies the use of two ICs in the same application (4 DC/DCs regulators).
The high operating frequency allowed by the synchronization input helps to reduce AM and FM interferences and grants the use of small and low cost inductors and capacitors.
The two switching regulators can be used in parallel and increase the output current capability up to 7 A.
The L5964 can manage the microcontroller supply. A configurable reset output and a configurable watchdog input are available.
This IC finds application in the automotive segment, where load dump protection and wide input voltage range are mandatory. The total quiescent current, when both DC/DCs and LDO are disabled, is less than 10 μA.
The product is available in two different packages. A slug down package, QFN48, able to dissipate on the PCB. An exposed pad up package, LQFP64, when the power requirement is higher and an external heatsink is needed.
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|型号||Package||Packing Type||Operating Temperature (°C) (min)||Operating Temperature (°C) (max)||Marketing Status||Unit Price (US$) *||Quantity||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|L5964L-VYY||LQFP||Tray||-40||105||Preview : Product is in design stage||2.9||1000||EAR99||-||MORE INFO||No availability reported, please contact our Sales office|
|L5964Q-V0Y||VFQFPN 48 7x7x1.0||Tray||-40||105||Preview : Product is in design stage||2.4||1000||EAR99||-||MORE INFO||No availability reported, please contact our Sales office|
|型号||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
|L5964Q-V0Y||Preview||VFQFPN 48 7x7x1.0||汽车||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.