L6460 datasheet(15/139 Pages) STMICROELECTRONICS

15 / 139 page

L6460

L6460’s main features

Doc ID 17713 Rev 1

15/139

voltages. This regulator can be used to drive an external bipolar pass transistor to

generate high current/low ripple output voltages.

●

One bidirectional serial interface with address detection so that different ICs can share

the same data bus.

●

Integrated power sequencing and supervisory functions with fault signaling through

serial interface and external reset pin.

●

Fourteen general purpose I/Os that can be used to drive/read internal/external

analog/logic signals.

●

One

8-bit/9-bit A/D converter (100 kS/s @ 9-bit, 200 kS/s @8-bit). It can be used to

measure most of the internal signals, of the input pins and a voltage proportional to IC

temperature.

–

Current sink DAC:

–

Three output current ranges: up to 0.64/6.4/64 mA.

–

64 (6-bit programmable) available current levels for each range.

–

5 V output tolerant.

●

Two operational amplifiers:

–

3.3 V supply, rail to rail input compatibility, internally compensated.

–

They can have all pins externally accessible or can be internally configured as a

buffer o make internal reference voltages available outside of the chip.

–

Unity gain bandwidth > 1 MHz.

–

They can also be set as comparators with 3.3 V input compatibility and low offset.

●

Two 3.3 V pass switches with 1

Ω R

DSon and short circuit protected.

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Programmable watchdog function.

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Thermal shutdown protection with thermal warning capability.

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Very low power dissipation in “low power mode” (~35 mW)

L6460 is intended to maximize the use of its components, so when an internal circuit is not

used it could be employed for other applications. Bridge 3, for example, can be used as a full

bridge or to implement two switching regulators with synchronous rectification: to obtain this

flexibility L6460 includes 2 separate regulation loops for these regulators; when the bridge is

used as a motor driver, the 2 regulation loops can be redirected on general purpose I/Os to

leave the possibility to assembly a switching regulator by only adding an external FET.

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