USER’S MANUAL
ISL8002xDEMO1Z and ISL80019xDEMO1Z
Demonstration Board
AN1817
Rev 1.00
March 10, 2015
Description
The ISL8002, ISL80019, ISL8002A, ISL8002D and ISL80019A
DEMO1Z kits are intended for use by individuals with
requirements for Point-of-Load applications sourcing from 2.7V
to 5.5V. The ISL8002DEMO1Z and ISL80019DEMO1Z boards
are used to demonstrate the performance of the ISL8002 and
ISL80019 low quiescent current mode converters.
The ISL8002 and ISL8019 are offered in a 8 pin 2mmx2mm
TDFN package with 1mm maximum height. The complete
converter occupies less than 64mm
2
area.
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
I
OUT
(MAX)
(A)
1.5
1.5
2
2
2
F
SW
(MHz)
1
2
1
2
2
2.7 to 5.5
0.6 to 5.5
8 pin
2mmx2mm
TDFN
V
IN
RANGE
(V)
V
OUT
RANGE
(V)
PACKAGE
SIZE
Key Features
• High efficiency synchronous buck regulator with up to 95%
efficiency
• 0.8% reference accuracy over temperature/load/line
• Start-up with prebiased output
• Internal soft-start - 1ms
• Soft-stop output discharge during disable
• 1MHz, 2MHz default frequency
• Negative OC protection
Ordering Information
PART NUMBER
ISL8002DEMO1Z
ISL8002ADEMO1Z
ISL80019DEMO1Z
ISL80019ADEMO1Z
ISL8002DDEMO1Z
DESCRIPTION
Switching frequency 1MHZ; Output current:
2A; PG rising /falling delay time: 1ms/15µs
Switching frequency 2MHZ; Output current:
2A; PG rising /falling delay time: 1ms/15µs
Switching frequency 1MHZ ; Output current:
1.5A; PG rising /falling delay time: 1ms/15µs
Switching frequency 2MHZ; Output current:
1.5A; PG rising /falling delay time: 1ms/15µs
Switching frequency 2MHZ; Output current:
2A; PG rising /falling delay time:
390µs/330µs
PART#
ISL80019
ISL80019A
ISL8002
ISL8002A
ISL8002D
TP1
VIN
VIN
EN
MODE
C2
C1
22UF
22µF
22UF
22µF
U1
1
2
3
4
9
A
VIN
EN
MODE
PG
EP
PHASE
PGND
FB
COMP
8
7
6
5
1
A
2
1.2UH
1.2µH
R1
C5
22PF
22pF 200kΩ
L1
VO
VO
TP3
C3
22µF
C4
22UF
22µF
TP4
A
ISL8002
C6
220PF
220pF
R14
100kΩ
C7
OPEN
R12
DNP
TP2
A
R2
100kΩ
A
VIN
VIN
A
VIN
VIN
R7
100kΩ
EN
EN
R8
OPEN
OFF
R9
OPEN
PFM
ON
MODE
VIN
VIN
R6
100kΩ
PWM
A
A
FIGURE 1. ISL8002DEMO1Z SCHEMATIC
AN1817 Rev 1.00
March 10, 2015
Page 1 of 6
ISL8002xDEMO1Z and ISL80019xDEMO1Z
ISL8002EVAL2Z Evaluation Board
FIGURE 2. TOP SIDE
FIGURE 3. BOTTOM SIDE
AN1817 Rev 1.00
March 10, 2015
Page 2 of 6
ISL8002xDEMO1Z and ISL80019xDEMO1Z
Quick Setup Guide
1. Ensure that the circuit is correctly connected to the supply and
loads prior to applying any power.
2. Connect the bias supply to V
IN
. Plus terminal to V
IN
(TP1) and
negative return to PGND (TP2).
3. Connect the output load to V
O
(TP3), and the negative return
to PGND (TP4).
4. Turn on the power supply.
5. Verify the output voltage is 1.8V for V
OUT.
PCB Layout Guidelines
The PCB layout is a very important converter design step to make
sure the designed converter works well. The power loop is
composed of the output inductor (L's), the output capacitor
(COUT), the PHASE's pin and the PGND pin. It is necessary to
make the power loop as small as possible and the connecting
traces among them should be direct, short and wide. The
switching node of the converter, the PHASE pins, and the traces
connected to the node are very noisy, so keep the voltage
feedback trace away from these noisy traces. The input capacitor
should be placed as closely as possible to the VIN pin and the
ground of the input and output capacitors should be connected
as closely as possible. The heat of the IC is mainly dissipated
through the thermal pad. Maximizing the copper area connected
to the thermal pad is preferable. In addition, a solid ground plane
is helpful for better EMI performance. It is recommended to add
at least 4 vias ground connection within the pad for best thermal
relief.
Recommended Equipment
The following materials are recommended to perform testing:
• 0V to 10V power supply with at least 5A source current
capability or 5V battery
• Electronic loads capable of sinking current up to 7A
• Digital Multimeters (DMMs)
• 100MHz quad-trace oscilloscope
Signal generator
FIGURE 4. SILKSCREEN TOP
FIGURE 5. SILKSCREEN BOTTOM
AN1817 Rev 1.00
March 10, 2015
Page 3 of 6
ISL8002xDEMO1Z and ISL80019xDEMO1Z
TABLE 2. BILL OF MATERIALS
PART NUMBER
H1044-00220-50V5-T
H1044-00221-50V5-T
H1044-DNP
H1046-00226-6R3V10-T
VLCF-4028T-1R2N2R7-2
QTY UNITS
1
1
0
4
1
ea.
ea.
ea.
ea.
ea.
REFERENCE
DESIGNATOR
C5
C6
C7
C1, C2, C3, C4
COMMENT
DESCRIPTION
CAP, SMD, 0402,
22pF, 50V, 5%, NP0
MANUFACTURER
MURATA
PANASONIC
MANUFACTURER
PART
GRM36COG220J050AQ
ECU-E1H220JCQ
ECU-E1H221JCQ
C1005C0G1H221J
CAP, SMD, 0402,
PANASONIC, TDK
220pF, 50V, 5%, C0G
CAP, SMD, 0402,
DNP-PLACE HOLDER
CAP, SMD, 0805, 22µF, JOHANSON DIELECTRICS 6R3R15X226KV4E
6.3V, 10%, X5R, ROHS INC
JMK212BJ226KG-T
VLCF4028T-1R2N2R7-2
VLCF4028T-1R2N2R7-2
TDK
L1 for ISL8002A, COIL-PWR
INDUCTOR, WW,
ISL80019A,
SMD, 4mm, 1.2µH,
2MHz
30%, 2.7A, ROHS
Wurth Electronics
L1 for ISL8002, COIL-PWR
ISL80019, 1MHz INDUCTOR, SMD,
4.45x4.6, 2.2µH,
20%, 3.25A, ROHS
U1
IC-2A BUCK
REGULATOR, 8P,
µTDFN, 2X2, ROHS
RES, SMD, 0402,
100kΩ, 1/16W, 1%
RES,SMD, 0402,
200kΩ, 1/16W, 1%
RES, SMD, 0402, DNP
RES, SMD, 0603,
100kΩ, 1/10W, 1%
RES, SMD, 060 3,
DNP-PLACE HOLDER
74437324022
1
ea.
74437324022
ISL8002IRZ
1
ea.
INTERSIL
ISL8002IRZ
H2510-01003-1/16W1-T
H2510-02003-1/16W1-T
H2510-DNP
H2511-01003-1/10W1-T
H2511-DNP
2
1
0
2
0
ea.
ea.
ea.
ea.
ea.
R2, R14
R1
R12
R6, R7
R8, R9
PANASONIC
VISHAY/DALE,
VENKEL
PANASONIC
ROHM
ERJ2RKF1003
CRCW0402200KFKED
CR0402-16W-2003FT
ERJ-3EKF1003V
MCR03EZPFX1003
AN1817 Rev 1.00
March 10, 2015
Page 4 of 6
ISL8002xDEMO1Z and ISL80019xDEMO1Z
Typical Performance Curves
LX 5V/DIV
V
IN
5V/DIV
V
OUT
1V/DIV
V
OUT
2V/DIV
VEN 2V/DIV
I
L
1A/DIV
PG 5V/DIV
PG 5V/DIV
1ms/DIV
500µs/DIV
FIGURE 6. ISL8002A START-UP AT 2A LOAD f
SW
= 2MHz, V
IN
= 5V,
MODE = PWM, T
A
= +25°C
FIGURE 7. ISL8002D START-UP V
IN
AT 2A LOAD f
SW
= 2MHz,
V
IN
= 5V, MODE = PWM, T
A
= +25°C
LX 5V/DIV
V
OUT
0.5V/DIV
I
L
2A/DIV
I
L
1A/DIV
V
OUT
1V/DIV
PG 5V/DIV
PG 5V/DIV
5µs/DIV
500µs/DIV
FIGURE 8. ISL8002A OUTPUT SHORT-CIRCUIT f
SW
= 2MHz,
V
IN
= 5V, MODE = PFM, T
A
= +25°C
FIGURE 9. ISL8002A OVERCURRENT PROTECTION f
SW
= 2MHz,
V
IN
= 5V, MODE = PWM, T
A
= +25°C
PHASE 5V/DIV
PHASE 5V/DIV
V
OUT
2V/DIV
V
OUT
0.5V/DIV
I
L
2A/DIV
I
L
2A/DIV
PG 5V/DIV
PG 5V/DIV
200µs/DIV
500µs/DIV
FIGURE 10. ISL8002D OUTPUT SHORT-CIRCUIT f
SW
= 2MHz,
V
IN
= 5V, MODE = PFM, T
A
= +25°C
FIGURE 11. ISL8002D OVERCURRENT PROTECTION f
SW
= 2MHz,
V
IN
= 5V, MODE = PWM, T
A
= +25°C
AN1817 Rev 1.00
March 10, 2015
Page 5 of 6
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