vicorpower.com

Rev 1.3

800 735.6200

09/2015

Page 5 of 26

PI33XX-X1

PGD

VS1

Block 4

VIN

Block 3

PGND

Block 2

SGND

ADJ

TRK

SDA

SCL

ADR0

ADR1

K

J

H

G

F

E

D

C

B

A

13

12

5

4

3

1

14

2

10

9

8

7

6

11

SGND

Block 1

VOUT

Block 5

Pin Description

Name

Number

Description

SGND

Block 1

Signal ground:

communication returns. SGND and PGND are star connected within the regulator package.

PGND

Block 2

Power ground:

VIN and VOUT power returns

VIN

Block 3

Input voltage:

and sense for UVLO, OVLO and feed forward ramp

VOUT

Block 5

Output voltage:

and sense for power switches and feed-forward ramp

VS1

Block 4

Switching node:

and ZVS sense for power switches

PGD

A1

Parallel Good:

Used for parallel timing management intended for lead regulator.

EAO

A2

Error amp output:

External connection for additional compensation and current sharing.

EN

A3

Enable Input:

Regulator enable control. Asserted high or left floating – regulator enabled;

REM

A5

Remote Sense:

High side connection. Connect to output regulation point.

ADJ

B1

Adjust input:

An external resistor may be connected between ADJ pin and SGND or VOUT to trim

the output voltage up or down.

TRK

C1

Soft-start and track input:

An external capacitor may be connected between TRK pin and SGND

to decrease the rate of rise during soft-start.

NC

K3, A4

No Connect:

Leave pins floating.

SYNCO

K4

Synchronization output:

Outputs a low signal for ½ of the minimum period for synchronization of

other converters.

SYNCI

K5

Synchronization input:

Synchronize to the falling edge of external clock frequency. SYNCI is a high

impedance digital input node and should always be connected to SGND when not in use.

SDA

D1

Data Line:

Connect to SGND for PI33XX-10 and -11. For use with PI33XX-20 and -21 only.

SCL

E1

Clock Line:

Connect to SGND for PI33XX-01. For use with PI33XX-21 only.

ADR1

H1

Tri-state Address :

No connect for PI33XX-01. For use with PI33XX-21 only.

ADR0

G1

Tri-state Address :

No connect for PI33XX-01. For use with PI33XX-21 only.

Package Pin-Out

Block 1:

B2-4, C2-4, D2-3, E2-3, F1-3, G2-3,

H2-3, J1-3, K1-2

Block 2:

A8-10, B8-10, C8-10, D8-10, E4-10,

F4-10, G4-10, H4-10, J4-10, K6-10

Block 3:

G12-14, H12-14, J12-14, K12-14

Block 4:

A12-14, B12-14, C12-14, D12-14,

E12-14,

Block 5:

A6-7, B6-7, C6-7, D6-7

123-Lead LGA (10mm x 14mm)

Top view