ZL9006M

4

FN7959.0

March 5, 2013

L1, L2

V1

I

Output voltage selection pin. Used to program the output voltage through pin-strap setting or connecting a resistor from the

programming.

L3

SS

I

Soft-start pin. Set SS pin by pin-strapping or connecting a resistor to SGND using the appropriate resistor. The pin can program

the delay from when EN is asserted until the output voltage starts to ramp, the output voltage ramp time during turn

L4

VTRK

I

Tracking sense input. Used to track an external voltage source.

L6

FB+

I

Output voltage positive feedback. Positive inputs of differential remote sense for the regulator. Connect to the output

rail or the regulation point of load/processor.

L7

FB-

I

Output voltage negative feedback. Negative input of the differential remote sense for the regulator. Connect to the

negative rail or ground of the load/processor.

L8

ISENB

I

Test pin. For factory test use. Solder down the pin for mechanical strength, but do not connect the pin.

PAD1

VIN

PWR Power inputs. Input voltage range: 4.5V to 13.2V. Tie directly to the input rail. When the input is between 4.5V to 5.5V,

VIN should be tied directly to VCC.

PAD2

PGND

PWR Power ground. Power ground pins for both input and output returns.

PAD3

SGND

PWR Signal ground. Connect to low impedance ground plane (see Figure 26 on page 25).

PAD4

SW

PWR Switch node. Use for monitoring switching frequency. SW pad should be floating or used for snubber connections. To

achieve better thermal performance, the SW planes can also be used for heat removal with thermal vias connected to

large inner layers (see Figure 26 on page 25).

PAD5

VOUT

PWR Power Output. Apply output load between these pins and PGND pins. Output voltage range: 0.6V to 3.6V.

PIN

LABEL

TYPE

DESCRIPTION