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ISL91127IRN-EVZ, ISL91127IRA-EVZ
Evaluation Board User Guide
Description
The
ISL91127IR
is a high-current buck-boost switching regulator
for systems using new battery chemistries. It uses Intersil's
proprietary buck-boost algorithm to maintain voltage regulation,
while providing excellent efficiency and very low output voltage
ripple when the input voltage is close to the output voltage. The
ISL91127IRN-EVZ and ISL91127IRA-EVZ platforms allow quick
evaluation of the high performance features of the ISL91127IR
buck-boost regulator series.
Specifications
The boards are designed to operate at the following operating
conditions:
• Input voltage rating from 1.8V to 5.5V
• Resistor programmable output voltage on the
ISL91127IRA-EVZ
• Fixed 3.3V output voltage on the ISL91127IRN-EVZ
• Up to 2A output current (PVIN = 2.5V, V
• 2.5MHz switching frequency
• Operating temperature range: -40°C to +85°C
VIN
GND
UG080 Rev 2.00
October 28, 2016
= 3.3V)
OUT
ISL91127IRAZ
PVIN
LX1
VIN
LX2
VOUT
MODE
FB
EN
SGND PGND
FIGURE 1. ISL91127IRA-EVZ BLOCK DIAGRAM
USER'S MANUAL
Key Board Features
• Small, compact design
• Jumper selectable EN (enabled/disabled)
• Jumper selectable MODE (auto-PFM/forced-PWM)
• Connectors, test points and jumpers for easy probing
References
•
ISL91127IR
datasheet
Ordering Information
PART NUMBER
ISL91127IRN-EVZ
Evaluation Board for ISL91127IRNZ
ISL91127IRA-EVZ
Evaluation Board for ISL91127IRAZ
UG080
Rev 2.00
October 28, 2016
DESCRIPTION
VOUT
GND
Page 1 of 7
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Summary of Contents for Renesas ISL91127IRN-EVZ
- Page 1 • Resistor programmable output voltage on the ISL91127IRA-EVZ Evaluation Board for ISL91127IRAZ ISL91127IRA-EVZ • Fixed 3.3V output voltage on the ISL91127IRN-EVZ • Up to 2A output current (PVIN = 2.5V, V = 3.3V) • 2.5MHz switching frequency • Operating temperature range: -40°C to +85°C...
- Page 2 ISL91127IR load can be connected to the V and GND headers on J1. buck-boost regulator. The ISL91127IRN-EVZ is for the fixed 3.3V Measure the input and output currents. Calculate efficiency output IC ISL91127IRNZ. The ISL91127IRA-EVZ is for the based on these measurements.
- Page 3 ISL91127IRN-EVZ, ISL91127IRA-EVZ Evaluation Board Images FIGURE 4. ISL91127IRA-EVZ TOP VIEW FIGURE 5. ISL91127IRN-EVZ TOP VIEW UG080 Rev 2.00 Page 3 of 7 October 28, 2016...
- Page 4 Vert. Pin Header, 6-Pin, 0.1” Spacing, Generic J3, J4 HDR-3 HDR-3 Vert. Pin Header, 3-Pin, 0.1” Spacing, Generic TP1 to TP6 Power Post Connectors TABLE 3. ISL91127IRN-EVZ EVALUATION BOARD BILL OF MATERIALS ITEM# DESIGNATORS PART TYPE FOOTPRINT DESCRIPTION VENDORS ISL91127IRNZ 4mmx4mm QFN Intersil ISL91127IR Buck-Boost...
- Page 5 ISL91127IRN-EVZ, ISL91127IRA-EVZ ISL91127IRA-EVZ, ISL91127IRN-EVZ Schematics FIGURE 6. ISL91127IRA-EVZ EVALUATION BOARD SCHEMATIC FIGURE 7. ISL91127IRN-EVZ EVALUATION BOARD SCHEMATIC UG080 Rev 2.00 Page 5 of 7 October 28, 2016...
- Page 6 ISL91127IRN-EVZ, ISL91127IRA-EVZ PCB Layout FIGURE 8. TOP LAYER FIGURE 9. BOTTOM LAYER UG080 Rev 2.00 Page 6 of 7 October 28, 2016...
- Page 7 10. It is the responsibility of the buyer or distributor of Renesas Electronics products, or any other party who distributes, disposes of, or otherwise sells or transfers the product to a third party, to notify such third party in advance of the contents and conditions set forth in this document.
- Page 8 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Renesas Electronics ISL91127IRA-EVZ ISL91127IRN-EVZ...
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