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ISL85410AEVAL1Z PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 ISL85410AEVAL1Z
部品説明 Synchronous Buck Regulators
メーカ Intersil
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ISL85410AEVAL1Z Datasheet, ISL85410AEVAL1Z PDF,ピン配置, 機能
Application Note 1905
Author: Paul Orfanu
ISL85410EVAL1Z, ISL85410AEVAL1Z, ISL85418EVAL1Z
Wide VIN 1A and 800mA Synchronous Buck Regulators
Description
The ISL85410EVAL1Z, ISL85410AEVAL1Z, ISL85418EVAL1Z
kits are intended for use for Point-of-Load applications
sourcing from 3V to 36V. The kits are used to demonstrate the
performance of the ISL85410, ISL85410A, ISL85418 Wide
VIN Low Quiescent Current High Efficiency Sync Buck
Regulators with 1A (ISL85410, ISL85410A) and 800mA
(ISL85418EVAL1Z) output current.
The ISL85410, ISL85410A, ISL85418 are offered in a
4mmx3mm 12 Ld DFN package with 1mm maximum height.
The converter occupies 1.516cm2 area.
Key Features
• Wide input voltage range 3V to 36V
• 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
• Internal fixed (500kHz) or adjustable switching frequency
300kHz to 2MHz
• Continuous output current up to 800mA
• Internal or external soft-start
• Minimal external components required
• Power-good and enable functions available
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. Verify that the position is ON for S1.
4. Turn on the power supply.
5. Verify the output voltage is 3.3V for VOUT.
Evaluating the Other Output Voltage
The ISL85410EVAL1Z, ISL85410AEVAL1Z, ISL85418EVAL1Z
kit outputs are preset to 3.3V; however, output voltages can be
adjusted from 0.6V to 15V. The output voltage programming
resistor, R3, will depend on the desired output voltage of the
regulator. The value for the feedback resistor is typically
between 0and 50kas shown in Equation 1.
R2
=
R1
-V---O----U--0-T---.-6–-----0---.--6--⎠⎞
(EQ. 1)
If the output voltage desired is 0.6V, then R1 is shorted. Please
note that if VOUT is less than 1.8V, the switching frequency and
compensation must be changed for 300kHz operation due to
minimum on-time limitation. Please refer to datasheets
ISL85410 and ISL85418 (FN8375/FN8369) for further
information.
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 2A
• Digital Multimeters (DMMs)
• 100MHz quad-trace oscilloscope
• Signal generator
Table 1 on page 2 shows the component selection that should
be used for the respective VOUTs.
FIGURE 1. FRONT OF EVALUATION BOARD ISL85410EVAL1Z
FIGURE 2. BACK OF EVALUATION BOARD ISL85410EVAL1Z
November 26, 2013
AN1905.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013. All Rights Reserved
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.
Free Datasheet http://www.datasheet4u.com/

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