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V•I Chip Pre-Regulator Module

P036F048T12AL

Rev. 1.5

Page 2 of 14

Overview of Adaptive Loop Compensation

Adaptive Loop compensation, illustrated in Figure 1, contributes to the

bandwidth and speed advantage of Factorized Power. The PRM

monitors its output current and automatically adjusts its output voltage

to compensate for the voltage drop in the output resistance of the

is set to a value that compensates for the output resistance of the VTM

The V•I Chip’s bi-directional VC port :

1. Provides a wake up signal from the PRM to the VTM that

synchronizes the rise of the VTM output voltage to that of the PRM.

2. Provides feedback from the VTM to the PRM to enable the PRM to

-In

PC

VC

TM

+In

-Out

+Out

VTM

+Out

-Out

K

Ro

+Out

–Out

+In

–In

VC

PC

TM

IL

VH

PR

NC

SG

SC

PRM-AL

OS

NC

CD

L

O

A

D

Factorized

(Io•Ro)

K

K

Vin

Output Power

Designator

P

036

F

048

T

12

AL

Pre-Regulator

Module

Input Voltage

Designator

Product Grade Temperatures (°C)

Grade

T

-40 to125 -40 to125

Configuration

F = J-lead

T = Through hole

Nominal

Factorized Bus

Voltage

AL = Adaptive Loop

Figure 1 — With Adaptive Loop control, the output of the VTM is regulated over the load current range with only a single interconnect between the PRM and

VTM and without the need for isolation in the feedback path.

General Specifications

V•I Chip Pre-Regulator Module

Part Numbering

Desired Load Voltage (Vdc)

1.0

V048F015T100

100

3.57

26.1

1.2

V048F015T100

100

2.94

32.4

1.5

V048F015T100

100

2.37

39.2

1.8

V048F020T080

80

2.61

35.7

2.0

V048F020T080

80

2.37

39.2

3.0

V048F030T070

70

2.37

39.2

3.3

V048F040T050

50

2.89

32.6

5.0

V048F060T040

40

2.87

33.2

8.0

V048F080T030

30

2.37

32.9

9.6

V048F096T025

25

2.37

32.9

10

V048F120T025

25

2.86

32.9

12

V048F120T025

25

2.37

39.2

15

V048F160T015

15

2.49

37.4

24

V048F240T012

12.5

2.37

39.2

28

V048F320T009

9.4

2.74

35.7

36

V048F480T006

6.3

3.16

30.1

48

V048F480T006

6.3

2.37

39.2

Table 1 — Configure your Chip Set using the PRM-AL

Note:

(1) See Table 2 on page 9 for nominal Vout range and K factors.

(2) See “PRM output power vs. VTM output power” on Page 10

(3) 1% precision resistors recommended