an1272

ISL6236 Evaluation Kit – Chipset Application
®
Application Note
This application note describes the ISL6236 evaluation
board intended for applications in notebook computers and
other battery-powered devices.
Description
As notebook computer and battery-powered equipment
complexity increases, higher levels of power management
integration are required to meet market demands. To
respond to the dynamic needs of its customers, Intersil
introduces the quad outputs, multi-function power supply
controller ISL6236. Its two fully programmable switch-mode
power supplies (SPMS), one programmable and one fixed
LDO outputs provide a robust power management solution
for an extremely wide range of applications. For more
information on the detailed workings of the ISL6236, please
consult the ISL6236 Data Sheet on the Intersil Company
website:
http://www.intersil.com
June 23, 2008
AN1272.1
Quick Setup Guide
1. Set the +25V power supply to +7V and place in the
“STANDBY” or “OFF” position. Connect the positive
terminal (+) of the supply to the +VIN terminal P1 and the
negative terminal (-) of the supply to GND P2.
2. Connect the positive terminal (+) of the electronic load to
the VOUT1 terminal P5. Connect the negative terminal (-)
of the electronic load to the GND terminal P6. Make sure
the electronic load is set to the 0A condition.
3. Check to ensure all switches are in their default positions
prior to application of power (refer to “Detailed
Description of Switch Settings” on page 2).
4. Set all power supplies to the “ON” position. Check both
5V and 25V power supply outputs with a DMM to ensure
correct voltage levels. Adjust if necessary.
5. Measure the default output voltages using DMM across
the test points.
•VOUT1: P7(+) to P8(-), it should read 1.5V
•VOUT2: P5(+) to P6(-), It should read 1.05V
What’s Inside
•LDO: P3(+) to P4(-), It should read 3.3V
The Evaluation Board Kit contains the following materials:
•VREF3: P14(+) to P8(-), It should read 3.3V
• ISL6236 EVAL2 REV A Board
• ISL6236 Data Sheet
At this point, the board has been properly powered up.
Normal testing can begin.
• ISL6236 Application Note (this document)
Summary
What’s Needed
The ISL6236EVAL2 is an adaptable evaluation tool which
showcases the performance of the ISL6236 chipset
designed to meet the power management requirements of
personal notebook computers or portable devices.
The following materials will be needed to perform testing:
• +25V, 20A Power Supply
The following pages provide jumper settings, pinout,
schematic of the board, bill of materials and layout drawings
to support implementation of this solution.
• +5.0V, 750mA Power Supply
• Electronic Load up to 15A
• Precision Digital Multimeter
• 4-Channel Oscilloscope
Note: Amperage rating of power supplies are determined by
maximum expected loading plus a percentage margin of
error.
The Intersil’s total power management portfolio continues to
expand with new selections to better fit our customer’s
needs. Refer to our web site for updated information:
http://www.intersil.com
For technical assistance or other assistance please call
1-888-INTERSIL (468-3774).
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Application Note 1272
How to Change Output Settings
Detailed Description of Switch Settings
Use following tables to change the adjustable outputs.
TABLE 4.
TABLE 1.
VOUT1
5V
1.5V
0.7V to 5.5V
FUNCTION
FB1 = GND, Default
FB1 = VCC
VFB*(1 + R11/R12) where VFB = 0.7V
SW1
EN2
FUNCTION
1
GND
VOUT2 shut down
2
VCC*
VOUT2 Active
3
REF
VOUT2 sequence to VOUT1
TABLE 5.
TABLE 2.
VOUT2
SW2
SKIP
FUNCTION
1
GND
Normal operational mode, automatic
switch over to Pulse Skipping at light load
FUNCTION
3.3V
REFIN2 = VCC, Default
1.05V
REFIN2 = VREF3
2
VCC*
Low Noise, fixed-frequency PWM
VREFIN2, where VREFIN2 = 0.5V to 2.5V
3
REF
Normal Operation Mode with Ultrasonic
Pulse-skipping, 20kHz min.
0.5V to 2.5V
TABLE 3.
LDO
5V
3.3V
0.7V to 4.5V
TABLE 6.
FUNCTION
LDOREFIN = GND, Default
LDOREFIN = VCC
2xVLDOREFIN, where VLDOREFIN = 0.35V to
2.25V
SW3
EN_LDO
FUNCTION
1
GND
LDO shut down
2
VCC*
LDO Active
3
N/C
No Connect
TABLE 7.
SW4
BYP
FUNCTION
1
GND
Set BYP to 0V, No LDO switchover
2
VOUT1*
Bypasses LDO Voltage with VOUT1
3
VOUT2
Bypasses LDO Voltage with VOUT2
TABLE 8.
SW5
EN1
FUNCTION
1
GND
VOUT1 Shutdown
2
VCC*
VOUT1 Active
3
REF
VOUT1 sequence to VOUT2
NOTE: * Indicates default settings.
For all switches, only toggle one position at a time and use breakbefore-make sequencing to avoid shorting VCC to GND.
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June 23, 2008
Application Note 1272
Pinout
REFIN2
ILIM2
OUT2
SKIP#
POK2
EN2
UGATE2
PHASE2
ISL6236
(32 LD 5X5 QFN)
TOP VIEW
32
31
30
29
28
27
26
25
LGATE2
VCC
3
22
PGND
EN_LDO
4
21
GND
VREF3
5
20
SECFB
VIN
6
19
PVCC
LDO
7
18
LGATE1
LDOREFIN
8
17
BOOT1
BYP
9
10
11
12
13
14
15
16
PHASE1
23
UGATE1
2
EN1
TON
POK1
BOOT2
ILIM1
24
FB1
1
OUT1
REF
ISL6236 Evaluation Board Top and Bottom View
(P4)
CHARGE PUMP
(P4)
GND
(P3)
LDO
(P5)
VOUT1
(P6)
GND
(P14)
VREF3
ISL6236 Controller
ISL6236EVAL2 REV A
(P1)
(P2)
(P29)
(P7)
(P8)
VIN
GND
PVCC
VOUT2
GND
FIGURE 1. ISL6236EVAL2 REV B EVALUATION BOARD TOP AND BOTTOM VIEW
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ISL6236EVAL2-Kit Schematic
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Application Note 1272
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June 23, 2008
Application Note 1272
Components List
REF DES
PART NUMBER
QTY
MANUFACTURER
DESCRIPTION
C1, C7, C8
08053D105KAT2A
3
AVX
1µF, 25V, X7R, 0805
C11
H1065-00475-10V10
1
GENERIC
4.7µF, 10V X5R 1206
C14, C16
TMK432BJ106KM
2
TAIYO-YUDEN
10µF, 25V X5R 1210
C2, C4, C5, C6, C10, C12,
C13, C23, C24, C26
H1046-00104-50V10
GENERIC
0.1µF, 50V, X7R, 0805
C27, C28
OPEN
0
C29, C30
6TPD330M
2
POSCAP SANYO
330µF, 6.3V, POS CAP 9mΩ, D size
10
C3, C9, C15, C17, C18, C19 OPEN
0
C31, C32
OPEN
0
POSCAP
D1, D4 to D6
OPEN
0
DIODES-INC
D2, D3
OPEN
0
ON-SEMI
D7, D8
OPEN
0
DIODES
0.2A, 30V, Schottky SOT23
D9
Open
0
ON-SEMI
2A, 30V, Schottky SOT23
L1
SD1009
1
FALCO
3.3µH, 6mΩ, 12.5mmx12.5mm Shielded
L2
SD1004
1
FALCO
2.2µH, 5mΩ, 12.5mmx12.5mm Shielded
P1, P2, P5 to P8
1514-2
6
KEYSTONE
Test Point Turret 0.150 Pad 0.100 Thole
P19 to P23
131-4353-00
5
TEKTRONIX
Scope Probe Test Point PCB Mount
P3, P11, P12, P14 to P18,
P24, P26 to P29
5000
KEYSTONE
Miniature Red Test Point 0.100 Pad 0.040 Thole
P4, P30
5001
2
KEYSTONE
Miniature Black Test Point 0.100 Pad 0.040 Thole
Q1
IRF7821
1
IR
30V 13.6A HEXFET Power MOSFET
Q2
IRF7832
1
IR
30V 20A HEXFET Power MOSFET
Q3
IRF7807V
1
IR
30V 8.3A N-Channel Power MOSFET
Q4
IRF7811AV
1
IR
30V 10.8A N-Channel Power MOSFET
R1, R8
H2512-00010-1/8W
2
GENERIC
1Ω, 1%, 0805
R15
H2512-01153-1/8W1
1
GENERIC
150kΩ, 1%, 0805
R2, R7, R9, R11, R13, R14,
R18, R19, R20, R22, R23,
R27, R34
OPEN
R25, R26
OPEN
R3, R10, R12, R17, R21,
R24, R30, R31
H2512-00R00-1/10W
GENERIC
0Ω, 1%, 0805
R32
H2512-03922-1/10W1
1
GENERIC
39.2kΩ, 1%, 0805
R4, R5, R16, R33
H2512-02003-1/10W1
4
GENERIC
200kΩ, 1%, 0805
R6
H2512-025R5-1/8W1
1
GENERIC
25.5Ω, 1%, 0805
SW1 to SW5
78B03S
5
GRAYHILL
Dip Switch SPST (Raised Slide)
U1
ISL6236IRZA
1
INTERSIL
High-Efficiency, Quad Output Controller
13
0
5
0
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Application Note 1272
Layout
FIGURE 2. TOP COMPONENTS
FIGURE 3. TOP ETCH
FIGURE 4. 2nd LAYER
FIGURE 5. 3rd LAYER
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Application Note 1272
Layout
(Continued)
FIGURE 6. BOTTOM COMPONENTS (MIRRORED)
FIGURE 7. BOTTOM ETCH (MIRRORED)
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to
verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
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