ISL85410 查看數據表（PDF） - Renesas Electronics
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ISL85410 Datasheet PDF : 21 Pages
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ISL85410
Wide VIN 1A Synchronous Buck Regulator
The ISL85410 is a 1A 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 ISL85410 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 a 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 ISL85410 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 a full-range industrial temperature of -40°C to
+125°C.
Related Literature
• AN1905, “ISL85410EVAL1Z, ISL85418EVAL1Z Wide VIN 1A,
800mA Synchronous Buck Regulator”
• AN1908, “ISL85410DEMO1Z, ISL85418DEMO1Z Wide VIN
1A, 800mA Synchronous Buck Regulator”
DATASHEET
FN8375
Rev 7.00
March 13, 2015
Features
• 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 1A
• 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
1 SS
FS 12
2
SYNC
COMP 11
R2
CFB
CBOOT
100nF
COUT
10µF
VOUT
L1
22µH
CVIN
10µF
3 BOOT
4 VIN
5 PHASE
6 PGND
GND
10
FB
9
VCC
PG
EN
R3
CVCC
1µF
INTERNAL DEFAULT PARAMETER SELECTION
FIGURE 1. TYPICAL APPLICATION
100
95
90
85
80
75
VIN = 15V VIN = 5V
70
VIN = 24V
65
60
VIN = 12V
55
VIN = 33V
50
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT LOAD (A)
FIGURE 2. EFFICIENCY vs LOAD, PFM, VOUT = 3.3V
FN8375 Rev 7.00
March 13, 2015
Page 1 of 21
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