SABRE-LL-I datasheet(14/141 Pages) STMICROELECTRONICS

14 / 141 page

S.A.B.Re’s main features

SABRE-LL-I

14/141

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One linear regulator (VMAIN_LIN) that can be used to generate low current/low ripple

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

generate high current/low ripple output voltages.

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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.

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One 8-bit/9-bit A/D converter (100KS/sec @ 9-bit, 200KS/sec @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.

–

5V output tolerant.

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Two operational amplifiers:

–

3.3V 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 > 1MHz.

–

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

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Two 3.3V pass switches with 1

Ω RDSon 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” (~35mW)

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S.A.B.Re 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 S.A.B.Re 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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