Intersil ISL8202MEVAL1Z, Руководство пользователя

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1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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May 3, 2016
UG071.0
ISL8202MEVAL1Z Evaluation Board User Guide
The ISL8202M power module is a single-channel synchronous
step-down complete power supply, capable of delivering up to
3A of continuous current. Operating from a single 2.6V to 5.5V
input power rail and integrating a controller, power inductor
and MOSFETs, ISL8202M can achieve up to 95% conversion
efficiency. It also provides fast transient response with
excellent loop stability as well as deliver output voltage as low
as 0.6V. Switching frequency is also adjustable from 680kHz
to 3.5MHz with either external resistor or SYNC clock option.
Selectable PFM mode can also be enabled to boost up
light-load efficiency to extend battery life. Other features
include programmable soft-start, soft-stop, input undervoltage
lockout, 100% duty cycle operation, over-temperature,
overcurrent/short-circuit with hiccup mode, overvoltage and
negative overcurrent protection. It also has a dedicated enable
pin and power-good flag that allow for easy system power rails
sequencing.
The ISL8202MEVAL1Z evaluation board is designed to
demonstrate the performance of the ISL8202M. The board is
by default set to be 1.2V output voltage with 1.5MHz switching
frequency. Other output voltage values can be easily set by
changing the jumper position. Switching frequency can be
adjusted by changing the FS pin resistor.
References
• ISL8202M datasheet
Key Features
• 2.6V to 5.5V input voltage range
• Adjustable output voltage as low as 0.6V with ±1.6%
accuracy over line/load/temperature
• Default 1.8MHz current mode control operations
- 680kHz to 3.5MHz resistor adjustable
- External synchronization up to 3.5MHz
- Selectable light-load efficiency mode
- 100% duty cycle LDO mode
• Programmable soft-start and soft-stop output discharge
• Dedicated enable pin and power-good flag
• UVLO, over-temperature, overcurrent, overvoltage and
negative overcurrent protections
Specifications/Default Set-Up
• V
IN
= 2.6V to 5.5V
• V
OUT
options (via jumper selection): 1V, 1.2V, 2.5V, 3.3V
• MAX I
OUT
up to 3A
• f
SW
= 1.5MHz by default
• Set to PWM mode by default
• 1ms soft-start time by default
Ordering Information
PART NUMBER DESCRIPTION
ISL8202MEVAL1Z ISL8202M single 3A power module evaluation
board
FIGURE 1. ISL8202MEVAL1Z BLOCK DIAGRAM
User Guide 071