L6706 datasheet(8/47 Pages) STMICROELECTRONICS

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Pins description and connection diagrams

L6706

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Doc ID 15698 Rev 2

OUTEN

Output enable pin.

Internally pulled up by 10 µA (typ) to 3 V. Forced low, the device stops

operations with all MOSFETs OFF: all the protections are disabled except for

preliminary over voltage. Leave floating, the device starts-up implementing soft-

start up to the selected VID code. Cycle this pin to recover latch from

protections; filter with 1 nF (typ) vs. SGND.

CS+

Current sense positive input.

Connect through an R-C filter to the phase-side of the output inductor.

See Section 20: Layout guidelines on page 43 for proper layout of this

connection.

CS-

Current sense negative input.

Connect through a Rg resistor to the output-side of the output inductor.

See Section 20: Layout guidelines on page 43 for proper layout of this

connection.

INT1

Test mode pin.

It must be left unconnected or connected to 3.3 V.

20 to 27

VID0 to

VID7

Voltage identification pins. (not internally pulled up).

Connect to SGND to program a '0' or connect to the external Pull-up resistor to

program a '1'. They allow programming output voltage as specified in Table 7.

INT2

Test mode pin.

It must be connected to SGND.

SSEND

Soft-start end signal.

Open drain output sets free after SS has finished and pulled low when

triggering any protection. Pull up to a voltage lower than 3.3 V, if not used it can

be left floating.

N.C.

Not internally connected.

INT3

Test mode pin.

It must be connected to 12 V.

N.C.

Not internally connected.

INT4

Test mode pin.

It must be connected to 12 V.

N.C.

Not internally connected.

VCCDR

LS driver supply.

VCDDR pin voltage has to be the same of VCC pin.

Filter with 1 x 1 µF MLCC capacitor vs. PGND.

LGATE

LS driver output.

A small series resistor helps in reducing device-dissipated power.

PGND

Power ground pin (LS drivers return path).

Connect to power ground plane.

PHASE

HS driver return path.

It must be connected to the HS MOSFET source and provides return path for

the HS driver.

Table 2.

Pin description (continued)

N°

Name

Description

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