Detailed description

SABRE-LL-I

4/8

●

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

generate high current/low ripple output voltage.

●

Current sink DAC:

– 64 available current levels (6 bits programmable).

– Up to 64 mA output current.

– 5 Volt tolerant.

●

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

– Unity Gain Bandwidth > 1MHz.

●

Two Comparators with 3.3V input compatibility and low offset.

●

Two 3.3V Pass Switches with 1

Ω R

●

One 8bits/9bits A/D converter (100KS/sec @ 9 bits, 200KS/sec @8bits). It can be used

to measure most of the internal signals, of the input pins and the IC temperature.

●

Fourteen General Purpose I/Os that can be used to drive/read internal/external

analog/logic signals.

●

Bidirectional Serial Interface with address detection so that different ICs can share the

same data-bus.

●

Programmable Watchdog function.

●

Integrated power sequencing and supervisory functions with fault signaling through

serial interface and external reset pin.

●

Thermal shutdown protection with thermal warning capability.

●

Very Low power dissipation in Shut-down mode (~35 mW)

●

SABRe is intended to maximize the use of its components, so that when an internal

circuit is not needed it could be used for other applications. Bridge 3, for example, can

be used as a bridge or to implement two switching regulators with synchronous

rectification: to obtain this flexibility SABRe 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 using an external FET and one of these regulation loops.