Renesas ISL91134IIQ-EVZ User manual

USER’S MANUAL
AN1957
Rev 0.00
September 5, 2014
ISL91134IIQ-EVZ
Evaluation Board
AN1957 Rev 0.00 Page 1 of 6
September 5, 2014 © 2014 Renesas Electronics
Description
The ISL91134 is an integrated boost with bypass switching
regulator for battery powered applications. The device provides
a power supply solution for products using one cell Li-ion or
Li-polymer battery. The device is capable of delivering up to
1.8A output current from VIN = 3V and VOUT = 5V. The no-load
quiescent current is only 108μA in boost mode and 45μA in
forced bypass mode, which significantly reduces the standby
consumption. The ISL91134 evaluation board allows quick
evaluation of the high performance features of this regulator.
Specifications
The boards are designed to operate at the following operating
conditions:
• Input voltage rating from 2.35V to 5.4V
• Output current: up to 1.8A (VIN = 3V, VOUT = 5V)
• Forced bypass or auto bypass modes with a 38mΩswitch
• PFM mode at light-load currents
• 108µA quiescent current minimizes standby consumption in
boost mode
• 2.5MHz switching frequency
Key Board Features
• Jumper selectable EN (Enabled/Disabled)
• Jumper selectable BYPS (Auto/Forced)
• Jumper selectable VSET (No offset/offset on VOUT)
• Connectors, test points, and jumpers for easy probing
References
•ISL91134 Datasheet
Ordering Information
EVALUATION BOARD NUMBER VOUT OPTION
ISL91134IIQ-EVZ 5.0/5.2V (VSET L/H)
FIGURE 1. ISL91134 TYPICAL APPLICATION SCHEMATIC
VIN =
2.35V TO 5.4V VOUT = 5V
ISL91134
VIN
EN
LX VOUT
C2
22µF
GND
PGND
C1
22µF
PG
RESET
R1
BYPS AUTO BYPASS
FORCED BYPASS
L1
0.47µH
VSEL
VOUT HI
VOUT LO

AN1957 Rev 0.00 Page 2 of 6
September 5, 2014
ISL91134IIQ-EVZ
Functional Description
The ISL91134 implements a complete boost switching regulator,
with PWM controller, internal switches, references, protection
circuitry and bypass control. The ISL91134 is designed to support
5V output voltage. A voltage select pin (VSET) is available to scale
up the output voltage by a small offset to compensate the load
transient droop. The evaluation boards have been functionally
optimized for best performance of the ISL91134. This part
requires only an inductor and a few external components to
operate. The 2.5MHz switching frequency further reduces the
size of external components. The input power and load
connections are provided through multi pin connectors for high
current operations.
The ISL91134 evaluation board is shown in Figures 3 and 4. The
board’s enable function is controlled by the on-board jumper header
J3. Similarly, the VSET function is controlled by the on-board jumper
header J4 and the BYPASS function can be set to Forced or Auto
mode by controlling the on-board jumper header J5.
The schematic of the ISL91134-EVZ evaluation board is shown
on page 4.The PCB layout images for all layers are shown in
Figures 5 and 6. The bill of materials of the ISL91134-EVZ is
shown in Table 1.
Operating Range
The VIN range of the boards is 2.35V to 5.4V. The VOUT for the
ISL91134 is 5V. The IOUT range of the boards is 0 to 2A. The
operating ambient temperature range is -40°C to +85°C.
Quick Start Guide
For the ISL91134 board, the voltage can be set to 5V with
VSET = 0 and 5.2V with VSET = 1.
Refer to the following Quick Setup Guide to configure and
power-up the board for proper operation. During the power-on
process, the expected waveforms are shown in Figure 2.
Quick Setup Guide
1. Install jumpers on J3 shorting EN to VIN.
2. Install jumper on J5 shorting BYPS to VIN, auto bypass mode.
3. Install jumper on J4 shorting VSET to GND or leave it as NC.
4. Connect power supply to J1, with voltage setting between
2.35V and 5.4V.
5. Connect electronic load to J2.
6. Place scope probes on VOUT test point, and other test points
of interest.
7. Turn on the power supply.
8. Monitor the output voltage VOUT = 5.05V when VIN < 5V (Boost
mode), VIN = VOUT when VIN > 5.15 (bypass mode), the supply
current should be ~110µA (boost mode) and ~95µA in (auto
bypass mode). In forced bypass (BYPS pin = GND), supply
current should be ~45µA.
9. Turn on the electronic load.
10. Measure the output voltage with the voltmeter. The voltage
should regulate within data sheet spec limits.
11. To determine efficiency, measure input and output voltages
at the test points J1 and TP3. The bench power supply can be
connected to the PVIN and GND headers on J1. The electronic
load can be connected to the VOUT and GND headers on J2
measure the input and output currents. Calculate efficiency
based on these measurements.
Layout Considerations
1. C1is used to compensate for line drops on cables from power
supply to the IC, this will not be required for the actual board
design.
2. The Input capacitor (C2) should be placed close to the IC to
reduce VIN spikes/noise.
3. Output capacitors (C3, C4) should be placed as close as
possible to the IC to minimize VOUT spikes.
4. Boost Inductor (L1) between VIN and LX should be connected
using short and wide traces. It is recommended to use
multiple vias between the LX pin and the inductor. Three vias
of 7mils width were used on the evaluation board.
5. Recommend maximizing copper pour area for VIN, VOUT and
GND for better thermal performance.
6. AGND and PGND of the IC should be connected to each other.
It is crucial to connect these two grounds at a location very
close to the IC.
FIGURE 2. START-UP WAVEFORM 50ΩLOAD

AN1957 Rev 0.00 Page 3 of 6
September 5, 2014
ISL91134IIQ-EVZ
ISL91134 Evaluation Board
FIGURE 3. TOP VIEW
FIGURE 4. BOTTOM VIEW

AN1957 Rev 0.00 Page 4 of 6
September 5, 2014
ISL91134IIQ-EVZ
ISL91134 Evaluation Board Schematic
VOUT
GND
VIN
VSEL
EN
BYP
VIN
BYP
VIN
VSEL
VIN
EN
VIN
GND GND GND
GND
VIN
TP2
SW
J2
CON6
1
2
3
4
5
6
C1
330uF
TP3
VOUT
J3
CON3
1
2
3
C2
22uF
TP4
PG
J4
CON3
1
2
3
C3
22uF
TP5
GND
C4
0.1uF
J5
CON3
1
2
3
R1
1M
J1
CON6
1
2
3
4
5
6
TP1
GND
L1
0.47uF
U1 ISL91134_EVZ
EN
A1
VIN
A3
VIN1
A4 SW C3
SW1 C4
VOUT B3
VSEL
B1
BYP
C1 PG A2
AGND
B2
AGND1
C2
AGND2
D1
PGND D2
PGND1 D3
PGND2 D4
VOUT1 B4
TABLE 1. ISL91134 EVALUATION BOARD BILL OF MATERIALS
ITEM# QTY DESIGNATORS PART TYPE FOOTPRINT DESCRIPTION VENDORS
1 1 U1 ISL91134 W4x4.16E WLCSP Intersil ISL91134 Boost with Bypass
Regulator
INTERSIL
2 1 L1 0.47µH 3.2x2.5mm PIFE32251B-R47MS-39 Cyntec
3 1 C1 330µF/6.3V/X5R 7343 T491D337K006AT Kemet
4 2 C2, C3 22µF/6.3V/X5R 0603 GRM188R61A226M ANY
5 1 C4 0.1µF 0603 GRM188R71H104KA93D ANY
61 R1 1MΩ1% 0603 Resistor, Generic ANY
7 2 J1, J2 HDR-6 HDR-6 Vert. Pin Header, 6-Pin, 0.1” Spacing,
Generic
FCI
8 3 J3, J4, J5 HDR-3 HDR-3 Vert. Pin Header, 3-Pin, 0.1” Spacing,
Generic
FCI
9 4 TP1, TP2, TP3, TP4 TEST POINT TEST POINT Test Point, 1514-2 KEYSTONE

AN1957 Rev 0.00 Page 5 of 6
September 5, 2014
ISL91134IIQ-EVZ
PCB Layout
FIGURE 5. TOP LAYER (RECOMMEND USING ISL91132 LAYOUT PLAN FOR ISL91134)
FIGURE 6. BOTTOM LAYER

AN1957 Rev 0.00 Page 6 of 6
September 5, 2014
ISL91134IIQ-EVZ
Typical Performance Curves
FIGURE 7. EFFICIENCY vs LOAD CURRENT, VOUT = 5V FIGURE 8. EFFICIENCY vs LOAD CURRENT, VOUT = 5.2V
FIGURE 9. FORCED BYPASS TO BOOST TRANSITION, 1A LOAD, VIN = 3V
80
82
84
86
88
90
92
94
96
98
100
0.001 0.01 0.1 1
EFFICIENCY (%)
IOUT (A)
3.6VIN
5.4VIN
2.7VIN 3VIN
4.2VIN
3.3VIN
VOUT = 5V
100
0.001 0.01 0.1 1
EFFICIENCY (%)
IOUT (A)
3.3VIN 3.6VIN
VOUT = 5.2V
2.7VIN
3VIN
4.2VIN
98
96
94
92
90
88
86
84
82
80
78
76
74

Corporate Headquarters
TOYOSU FORESIA, 3-2-24 Toyosu,
Koto-ku, Tokyo 135-0061, Japan
www.renesas.com
Contact Information
For further information on a product, technology, the most
up-to-date version of a document, or your nearest sales
office, please visit:
www.renesas.com/contact/
Trademarks
Renesas and the Renesas logo are trademarks of Renesas
Electronics Corporation. All trademarks and registered
trademarks are the property of their respective owners.
IMPORTANT NOTICE AND DISCLAIMER
RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (“RENESAS”) PROVIDES TECHNICAL
SPECIFICATIONS AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING
REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND
OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS.
These resources are intended for developers skilled in the art designing with Renesas products. You are solely responsible
for (1) selecting the appropriate products for your application, (2) designing, validating, and testing your application, and (3)
ensuring your application meets applicable standards, and any other safety, security, or other requirements. These
resources are subject to change without notice. Renesas grants you permission to use these resources only for
development of an application that uses Renesas products. Other reproduction or use of these resources is strictly
prohibited. No license is granted to any other Renesas intellectual property or to any third party intellectual property.
Renesas disclaims responsibility for, and you will fully indemnify Renesas and its representatives against, any claims,
damages, costs, losses, or liabilities arising out of your use of these resources. Renesas' products are provided only subject
to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use of any Renesas resources
expands or otherwise alters any applicable warranties or warranty disclaimers for these products.
(Rev.1.0 Mar 2020)

Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Renesas Electronics:
ISL91134IIQ-EVZ