Intersil ZL2005P User Manual

Description

The ZL2005P is an innovative mixed-signal
power management and conversion IC that
combines a compact, efficient, synchronous buck
controller, adaptive drivers and key power and
thermal management functions in a single
package. The ZL2005PEV4 platform allows
evaluation of the features in the highly­configurable ZL2005P via the SMBus interface
using PMBus™ commands. The PMBus
command set is accessed by using Zilker Labs
evaluation software from a PC running Microsoft
Windows.

This evaluation board is meant to enable rapid
evaluation of the functionality of the ZL2005P in
a 10 Amp configuration. It has been optimized for
ease of evaluation across a wide range of input
and output conditions. This ZL2005PEV4
platform is provided as a reference design.

Features

• PMBus control via SMBus

• Pin-strap selection for stand-alone operation

• V

• R

settable from +0.8V to +3.3V

OUT

sensing

DS(ON)

• Convenient power connection

• Onboard enable switch

• Power good indicator

• External temperature sensor

Target Specifications

This board has been designed for the following
conditions:

• V

• V

• I

• F

• Output ripple: < 1%

• Dynamic response 3% (7.5A - 10A step load) @ 2.5V

• Temperature: 25°C

= 12V (Board range 4.5V to 13.2V)

IN

= 1.2V (Board range is 0.8V to 3.3V)

OUT

= 0A - 10A

OUT

= 600kHz

SW

POWER IN

EN

ZL2005P

POWER OUT

Address

select

SMBus

Figure 1. Block Diagram

ZL2005PEV4

Functional Description

The ZL2005PEV4 provides the circuit required
to demonstrate the features of the ZL2005P in a
10Amp configuration. The ZL2005PEV4 has a
functionally-optimized layout that allows highly­efficient operation to its maximum output current
(See board picture in Figure 2). The input power
connection is provided through banana jack
terminals. Stand-alone operation of the ZL2005P
is achieved by factory installed pin-strap settings
and pre-configuration via PMBus commands.
PMBus protocol communication is performed
via a SMBus interface using an external USB to
SMBus adaptor. PMBus commands can be used
to modify the settings of the evaluation platform.

Figure 3 shows the ZL2005P circuit schematic.
The circuit consists of the ZL2005P power
conversion and management IC with its minimal
component count.

The input voltage connection is made at J1 which
is labeled VIN+/-. J2 is the output connector for
the output voltage, VOUT+/-. The VIN+/- and
VOUT+/- connections are rated to 10 A.

The ZL2005P SMBus address is set by the
jumper applied to J12. The SA1 pin is strapped
by an 11k resistor to ground. The J12 jumper
applies a different resistor to the SA0 pin to
achieve the indicated SMBus address settings.
Note that power must be cycled to set a new
address.

Refer to Figures 5 through 10 for component
placement and board layout. The board layout
has been optimized for two-sided component
area and thermal performance. For ZL2005P
circuit layout design considerations refer to
Zilker Labs Application Note AN10 (Reference
1 on page 21).

Figure 4 shows the ZL2005PEV4 interface
schematic. It contains various circuits that
interface to the ZL2005P’s circuit. The hardware
enable function is controlled by a toggle switch
(SW1) on the ZL2005PEV4 board. External
temperature is monitored from a 2N3904
transistor (Q3) connected to the XTEMP pin.
This external temperature is read with the
READ_TEMPERATURE_2 PMBus command.
The power good status is indicated by the PG
LED at D11. The PG LED indicates the correct
state of the power good signal when power is
applied to the ZL2005PEV4 board. The right
angle headers at opposite ends of the board (J10
and J11) are available to daisy chain multiple
boards. The SMBus and Enable signals are
passed between these connectors. All header pins
and switch positions are labeled on the
ZL2005PEV4 board’s silkscreen as shown in
Figure 5.

2 ZL2005PEV4DSr1.0

ZL2005PEV4

Operation

Stand-Alone Operation

The ZL2005PEV4 is easy to setup and operate. It
is configured, out of the box, to provide 1.2V at
10A from a 12V source. All input and output
connections should be made before turning the
input supply on.

When the input power supply is turned on, and
the enable switch is set to enable, the ZL2005P
will output the configured voltage. A load can
be applied to the output and the circuit can be
tested.

PMBus Operation

The ZL2005P utilizes the PMBus protocol. The
PMBus functionality can be accessed via USB
from a PC running the Zilker Labs Evaluation
software on a Windows-XP or Windows­2000/NT operating system.

The enable switch can then be moved to
“ENABLE” and the ZL2005P can be tested.
Alternatively, the PMBus commands
ON_OFF_CONFIG and OPERATION may be
used to manipulate the enable state.

Modifying the ZL2005PEV4

In order to design and test an alternative power
train circuit with the ZL2005P, choose a desired
operating conditions and power train. Enter the
selected power design parameters into Zilker
Labs’ PID calculation/simulation tool. The
results from the simulation tool provide
appropriate compensation values to configure the
new ZL2005P circuit. Apply the new power
train circuit to the evaluation board. Power the
board and invoke the evaluation software. Then
configure the new PID coefficients using the
“PMBus: Basic” command page or loading a
configuration text file with the new
compensation coefficients in it.

Install the Zilker Labs Evaluation software using
the CD included in the ZL2005PEV4 kit or
download it from the web at

www.zilkerlabs.com

For PMBus operation, connect a USB/SMBus
adaptor (J2) to the EVB (J10). Apply a USB
cable between the USB/SMBus adaptor and the
PC. Connect the output of the ZL2005PEV4 to
the desired load. Then connect an appropriate
power supply to the input. Place the enable
switch in “DISABLE” and turn on the power.
Invoke the ZL2005P interface software.

The Zilker Labs Evaluation software allows
modification of all ZL2005P PMBus parameters.
Manually configure the ZL2005P with the
interface software or load a predefined
configuration from a configuration text file.

Use the mouse-over pop-ups for help with the
Zilker Labs Evaluation software. Refer to the
Zilker Labs Application Note AN13 (Reference
3 on page 21) for PMBus details.

.

ZL2005PEV4DSr1.0 3

ZL2005PEV4

Quick Start Guide

Stand-alone Operation

1. Set enable switch (EN) to “DISABLE”

2. Apply load to VOUT+/VOUT-

3. Connect power supply to VIN+/VIN-

(supply turned off)

4. Turn power supply on

5. Set enable switch (EN) to “ENABLE”

6. Test ZL2005P operation

PMBus Operation

1. Insert the Zilker Labs Eval Software CD

2. Install the Eval Software by running

setup.exe from the ZL_Eval_Installer folder
on the CD.

3. Connect a USB/SMBus adaptor (J2) to the

EVB (J10)

4. Select a SMBus address with the jumper on

J12

5. Connect supplied USB cable from computer

to EVB

a. Upon first time connection, the Found

New Hardware Wizard will appear.
Select “No, Not this time” and click
Next

b. Select “Install from a list or specific

location (Advanced)” and click Next

c. Select “Search the best driver in these

locations” and only select the “Search
removable media” option, then click
Next

d. If you encounter a popup warning during

driver installation, click the “Continue
Anyway” button

6. Follow steps 1 - 4 under Stand-alone

Operation

7. Invoke “Zilker_Labs_Eval” from the Start

menu under Zilker Labs

8. Monitor and configure EVB using the

informative pages in the evaluation software

9. Test the ZL2005P operation

Connect input

voltage here

Connect load

here

Connect SMBus

controller here

Connect other

eval boards here

PG LED EN Switch Address select

Figure 2. ZL2005PEV4 Evaluation Board

4 ZL2005PEV4DSr1.0

ZL2005PEV4

Schematics

VOUT

VOUT

J2

VIN

C2

22uF

C1

22uF

L1

BSZ130

0.47uH

1
2
3

4

Q1

8
7
6
5

CON2_Banana

C10

47uF

VOUT

8
7
6
5

6.3V

47uF

6.3V

C9

C8

47uF

6.3V

C7

47uF

6.3V

C6

47uF

6.3V

Q2

BSZ035

GND

1
2
3

4

AUSTIN, TEXAS 78746

BUILD I NG A, SUI TE 100

4301 WESTBANK DRIVE

ZILKER L ABS, INC. CONFIDENTIAL AND PROPRIETARY

Title

of

12Tuesday , October 23, 2007

Sheet

RSCH-ZL2005-016 2.1

SCHEMATIC, 10A POIN T OF LOAD

A

Size Document Number Rev

Temperature Measurement

VIN

C5

1uF

ISENB

ISENA

GL

SW

GH

Optiona l

0

R1

C11

0.1uF

VDD

C3

4.7uF

V25

Q3

2N3904

28
29
30
31
32
33
34
35
36

BST

D1

BAT54

C12

0.1uF

C4

4.7uF

24

25

GH

SW

20

21

23

22

GL

VR

PGND

SGND

ISENB19ISENA

VSEN
VTRK
SS1
SS0
UVLO
V1
V0
FC1

ZL2005P

FC0

26

27

BST

VDD

V25

XTEMP

VADJ

MGN

CFG

EN

DLY0
DLY1

PG

VSENSE

GND_SIGNAL

GND_SIGNAL

37
18

17
16
15

R5

14
13
12
11
10

34.8k

VO UT max set

R4

16.2k

to 3.3V

place near low side FET

DGND1SYNC2SA03SA14ILIM16SCL7SDA8SALRT

U1

ILIM0

9

5

R3

11k

SMBus Address

set by J12

(page 2)

PG

EN

ZL2005PEV4DSr1.0 5

SYNC

SA0

SCL

SDA

SALRT

VTRK

Figure 3. ZL2005P Circuit

ZL2005PEV4

of

Enable

Monitor

Di sable

SW1

123

SW_SPDT

+Vi2c

Enable on PG_0

Enable Open

Enable on Bus

JP1

213

4

R13

10.0K

SYNC

VTRK

VIN

EN

VIN

J1

VOUT

CON2_Banana

AUSTIN, TEXAS 78746

BUILD ING A, SU I TE 100

4301 WESTBANK DRIVE

+Vi2c

D10

STPS20L45CG

D-2PAK

Backside

C67

22uF

C63

180uF

16V

PG

This regulator allows stand alone operation when not

using a USB dongle. When no USB dongle is applied,

this regualtor is supplying Vi2c current thus

efficiency measurements will be affected.

D12

BAT54

U10

C68

22uF

3

VO

G

4

G

2

VI

MIC2920A-3.3BS

1

R15

10.0K

ZILKER LABS, INC. CONFIDENTIAL AND PROPRIETARY

PG

SCHEMATIC, Interface

Title

22Tuesday , June 12, 2007

Sheet

RSCH-ZL2005-016 2

A

Size Docum ent Number Rev

SYNC

To Next Rail

J11

EN_BUS

13579

246

8

R14

470

+Vi2c

D11

SA0

GRN

21

J12

3 4

5 6

R1719.6k

R1821.5k

R1923.7k

Addr

0x20

0x21

Q10

2N7002/SOT

The referenc e des igns c ont ained in this doc um ent are f or reference and exam ple purpos e only .

THE REFERENCE D ESI GN S AR E PR OVIDED "AS IS" AN D "W I TH ALL F AU LTS" AND ZILKER

LABS DISC LAMES ALL WAR R AN TIES, WH ETHER D I R EC T, I ND I R EC T, C ON SEQU EN TIAL

(INCLUDING LOSS OF PROFITS), OR OTHERWISE, RESU LTING FROM THE R EFERENCE

DESIGN S O R AN Y USE THER EOF .

Any us e of such ref erenc e des igns is at y our own risk and y ou agree to indem nif y Z ilk er Labs

f or any dam ages res ult ing f rom s uc h us e.

7 8

9 10

HEADER 5x 2 PI N

R2026.1k

R2128.7k

0x22

0x23

0x24

HEADER 5X2

10

+Vi2c

Place pullups near J11

EN_BUS

PG_0

13579

J10

From Previous Rail

246

8

HEADER 5X2

10

R12

10.0K

R11

10.0K

R10

10.0K

SDA

SALRT

SCL

SCL

SDA

SALRT

Figure 4. ZL2005P Interface

6 ZL2005PEV4DSr1.0

ZL2005PEV4

Board Layout

ZL2005PEV4DSr1.0 7

Figure 5. PCB – Silk Screen Top