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ISL85418 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 ISL85418
部品説明 800mA Synchronous Buck Regulator
メーカ Intersil
ロゴ Intersil ロゴ 



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ISL85418 Datasheet, ISL85418 PDF,ピン配置, 機能
DATASHEET
Wide VIN 800mA Synchronous Buck Regulator
ISL85418
Features
The ISL85418 is a 800mA synchronous buck regulator with an
input range of 3V to 40V. It provides an easy to use, high
efficiency low BOM count solution for a variety of applications.
The ISL85418 integrates both high-side and low-side NMOS
FETs and features a PFM mode for improved efficiency at light
loads. This feature can be disabled if forced PWM mode is
desired. The part switches at a default frequency of 500kHz
but may also be programmed using an external resistor from
300kHz to 2MHz. The ISL85418 has the ability to utilize
internal or external compensation. By integrating both NMOS
devices and providing internal configuration options, minimal
external components are required, reducing BOM count and
complexity of design.
With the wide VIN range and reduced BOM, the part provides
an easy to implement design solution for a variety of
applications while giving superior performance. It will provide
a very robust design for high voltage industrial applications as
well as an efficient solution for battery powered applications.
The part is available in a small Pb-free 4mmx3mm DFN plastic
package with an operation temperature range of -40°C to
+125°C.
Related Literature
• Wide input voltage range 3V 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
• 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
Applications
• Industrial control
• Medical devices
• Portable instrumentation
• Distributed power supplies
• Cloud infrastructure
AN1905, “ISL85410EVAL1Z, ISL85418EVAL1Z Wide VIN 1A,
800mA Synchronous Buck Regulator”
AN1908, “ISL85410DEMO1Z, ISL85418DEMO1Z Wide VIN
1A, 800mA Synchronous Buck Regulator”
CBOOT
100nF
COUT
10µF
VOUT
L1
22µH
CVIN
10µF
1 SS
2
SYNC
3 BOOT
4 VIN
5 PHASE
6 PGND
GND
FS 12
COMP 11
10
FB
9
VCC
PG
EN
R2
CVCC
1µF
R3
CFB
INTERNAL DEFAULT PARAMETER SELECTION
FIGURE 1. TYPICAL APPLICATION
100
95 VIN = 12V
VIN = 5V
90
85
80
75
VIN = 15V
VIN = 33V
70
65
60 VIN = 24V
55
50
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
OUTPUT LOAD (A)
FIGURE 2. EFFICIENCY vs LOAD, PFM, VOUT = 3.3V
0.8
March 13, 2015
FN8369.5
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 2013-2015. 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.

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