2

Pin configuration

Figure 2. Pin connection (marking view)

EN

VOUT_12

VOUT_5

VIN_12

GND

VIN_5

IMON_5/12

IMON_SEL

10

1

2

3

9

4

5

8

7

6

NC

SATAIG

Table 1. Pin description

Pin #

Symbol

Function

1

VIN_12

12 V rail supply voltage.

2

SATAIG

SATA ignore pin. This pin must be driven by an open-drain circuit. If left floating, the

SAS-disable signal (EN pin signal) is used.

If set low, it is ignored. This pin is internally pulled-up to 1.8 V via an internal current

generator.

Please refer to Section 6.3.

3

NC

Reserved. Leave this pin floating or connect it to GND.

4

GND

Ground

5

VIN_5

5 V rail supply voltage.

6

VOUT_5

5 V rail output voltage.

7

IMON_5/12

Current monitoring output for 5 V or 12 V rail.

8

IMON_SEL

Current monitoring selection pin. This pin must be driven by an open-drain circuit.

This pin is pulled up to 1.8 V via an internal current generator, so by default the

IMON_12 signal is shown on pin 7. If connected to GND, pin 7 shows the IMON_5 value.

Refer to Section 6.5.

9

EN

SAS-disable input: set this pin logic-low to turn on the device, high to turn off the

device. This pin is internally pulled down to GND via a 3.3 MΩ resistor.

10

VOUT_12

12 V rail output voltage.

STEF512SRI

Pin configuration

DS14138 - Rev 1

page 3/28