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PDF ISL85415 Data sheet ( Hoja de datos )
| Número de pieza | ISL85415 | |
| Descripción | 500mA Synchronous Buck Regulator | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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DATASHEET
Wide VIN 500mA Synchronous Buck Regulator
ISL85415
Features
The ISL85415 is a 500mA Synchronous buck regulator with an
input range of 3V to 36V. It provides an easy to use, high
efficiency low BOM count solution for a variety of applications.
The ISL85415 integrates both high-side and low-side NMOS
FET's 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 ISL85415 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 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 500mA
• 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
• AN1859, “ISL85415EVAL1Z Wide VIN 500mA Synchronous
Buck Regulator”
• AN1860 ISL85415DEMO1Z Wide VIN 500mA 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
11
COMP
10
FB
9
VCC
PG
EN
R2
CVCC
1µF
R3
CFB
INTERNAL DEFAULT PARAMETER SELECTION
FIGURE 1. TYPICAL APPLICATION
100
95
VIN = 15V
VIN = 12V
VIN = 5V
90
85
80
75
70 VIN = 24V
65
VIN = 33V
60
55
50
0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
OUTPUT LOAD (A)
FIGURE 2. EFFICIENCY vs LOAD, PFM, VOUT = 3.3V
October 30, 2014
FN8373.4
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, 2014 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.
1 page  
Functional Block Diagram
ISL85415
FB
FS
SYNC
FB
OSCILLATOR
PFM
5M CURRENT
SET
gm
INTERNAL = 50µs
EXTERNAL = 230µs
EN/SOFT
START
600mV VREF
POWER
GOOD
LOGIC
5M
BIAS
LDO
FAULT
LOGIC
600MV/AMP
CURRENT SENSE
PWM/PFM
SELECT LOGIC
FB
sQ
RQ
PWM
GATE
DRIVE
AND
PWM DEADTIME
450MV/T SLOPE
COMPENSATION
(PWM ONLY)
150k
INTERNAL
54pF COMPENSATION
ZERO CURRENT
DETECTION
PACKAGE
PADDLE
VCC
BOOT
PHASE
PGND
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL85415FRZ
5415
-40 to +125
12 Ld DFN
L12.4x3
ISL85415EVAL1Z
Evaluation Board
NOTES:
1. Add “T” suffix for Tape and Reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL85415. For more information on MSL please see techbrief TB363.
Submit Document Feedback
5
FN8373.4
October 30, 2014
5 Page 
ISL85415
Efficiency Curves fSW = 500kHz, TA = +25°C (Continued)
100 100
95
VIN = 24V
95
VIN = 24V
90 90
85 85
80 80
75 75
70 70
65 65
60 60
55 55
50
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09
OUTPUT LOAD (A)
FIGURE 23. EFFICIENCY vs LOAD, PFM, VOUT = 1.8V
0.1
50
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09
OUTPUT LOAD (A)
FIGURE 24. EFFICIENCY vs LOAD, PFM, VOUT = 3.3V
0.1
100
95 VIN = 24V
90
85
80
75
70
65
60
55
50
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09
OUTPUT LOAD (A)
FIGURE 25. EFFICIENCY vs LOAD, PFM, VOUT = 5V
0.1
5.022
5.020
5.018
5.016
5.014
VIN = 12V
VIN = 6V
5.012
5.010
5.008
VIN = 33V
VIN = 15V
5.006
0
VIN = 24V
0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
OUTPUT LOAD (A)
FIGURE 26. VOUT REGULATION vs LOAD, PWM, VOUT = 5V
5.040
5.030
5.020
VIN = 12V
VIN = 6V
5.010
5.000
4.990
VIN = 33V VIN = 15V
VIN = 24V
4.980
4.970
0
0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
OUTPUT LOAD (A)
FIGURE 27. VOUT REGULATION vs LOAD, PFM, VOUT = 5V
Submit Document Feedback 11
FN8373.4
October 30, 2014
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet ISL85415.PDF ] | |
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