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ISL85413DEMO1Z

P1-P3
1
Application Note 1931
ISL85413DEMO1Z, ISL85412DEMO1Z Wide V
IN
Synchronous Buck Regulator - Short Form
Description
The ISL85413DEMO1Z, ISL85412DEMO1Z kit is intended for
use for point-of-load applications sourcing from 3.5V to 40V.
The kit is used to demonstrate the performance of the
ISL85413, ISL85412 Wide V
IN
Low Quiescent Current High
Efficiency Synchronous Buck Regulator with 300mA
(ISL85413) and 150mA (ISL85412) output current.
The ISL85413, ISL85412 is offered in a 3mmx3mm 8 Ld DFN
package with 1mm maximum height.
Recommended Equipment
The following materials are recommended to perform testing:
• 0V to 50V power supply with at least 2A source current
capability
• Electronic loads capable of sinking current up to 1.5A
• Digital Multimeters (DMMs)
• 100MHz quad-trace oscilloscope
• Signal generator
Key Features
• Wide input voltage range 3.5V to 40V
• Synchronous operation for high efficiency
• No compensation required
• Integrated high-side and low-side NMOS devices
• Selectable PFM or forced PWM mode at light loads
• Continuous output current up to 300mA (ISL85413) and
150mA (ISL85412)
• Internal soft-start
• Minimal external components required
• Power-good and enable functions available
References
• ISL85412 Datasheet
• ISL85413
Datasheet
Ordering Information
PART NUMBER DESCRIPTION
ISL85412DEMO1Z Demonstration Board (150mA Output Current)
ISL85413DEMO1Z Demonstration Board (300mA Output Current)
FIGURE 1. FRONT OF EVALUATION BOARD ISL85413DEMO1Z, ISL85412DEMO1Z
March 13, 2015
AN1931.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Copyright Intersil Americas LLC 2014, 2015. All Rights Reserved.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Application Note 1931
2
AN1931.1
March 13, 2015
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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 VIN, the plus terminal to VIN (P4)
and the negative return to GND (P5).
3. Turn on the power supply.
4. Verify the output voltage is 3.3V for V
OUT.
Evaluating the Other Output Voltage
The ISL85413DEMO1Z, ISL85412DEMO1Z kit output is preset to
3.3V; however, output voltages can be adjusted from 0.6V to 15V.
Please refer to application note AN1929
and ISL85412 datasheet
for further information.
Disabling/Enabling Function
The ISL85413DEMO1Z, ISL85412DEMO1Z boards have the EN
pin tied to V
CC
via R
7
. This keeps the part enabled all the time. To
disable the part, remove R
7
and populate R
8
with a 0Ω resistor.
MODE Control
The ISL85413 and ISL85412 evaluation boards have a MODE pin
that allows different mode operation. The Default board
configuration has R
6
= 200k to V
CC
, which defaults to PWM
operation mode. If this pin is tied to GND the IC will operate in
PFM mode.
ISL85413
200K
VIN
OPEN
BOOT
MODE
PG
VCC
MODE
OPEN
200K
VIN
EN
OPEN
150UF
10UF 10UF
VO
22UF
33UH
PHASE
0.1UF
L8.3X3H
1UF
EN
FB
PG
VCC
20K
330PF
90.9K
VO
C10
3
12
9
4
2
1
5
6
7
8
P1
R9
P2
R6
R7
R8
P9
P5
C1
P4
C2
P7
C6
C5
L1
C3
U1
C9
R2
C4
R1
A
5
8
7
6
EP
4
3
1
2
AA
A
A
21
21
2
1
21
21
1
1
2
1
2
1
1
1
1
1
1
2
1
2
2
1
12
NOTE: If the IC is used in an application where the input test leads have large parasitic inductance, the input electrolytic
capacitor C
10
may be added to prevent transient voltages on the input pin.
FIGURE 2. ISL85413DEMO1Z AND ISL85412DEMO1Z SCHEMATIC
Application Note 1931
3
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 document is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
AN1931.1
March 13, 2015
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ISL85413DEMO1Z Board Layout
FIGURE 3. SILKSCREEN TOP
FIGURE 4. SILKSCREEN BOTTOM
P1-P3

ISL85413DEMO1Z

Mfr. #:
Buy ISL85413DEMO1Z
Manufacturer:
Renesas / Intersil
Description:
Power Management IC Development Tools ISL85413 DEMO BOARD 1 - 8 LD TDFN - RoHS
Lifecycle:
New from this manufacturer.
Delivery:
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