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PDF ISL85413 Data sheet ( Hoja de datos )
| Número de pieza | ISL85413 | |
| Descripción | 300mA Synchronous Buck Regulator | |
| Fabricantes | Intersil | |
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DATASHEET
Wide VIN 300mA Synchronous Buck Regulator
ISL85413
Features
The ISL85413 is a 300mA synchronous buck regulator with an
input range of 3.5V to 40V. It provides an easy to use, high
efficiency low BOM count solution for a variety of applications.
The ISL85413 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 700kHz.
By integrating both NMOS devices and providing internal
configuration, 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 3mmx3mm TDFN
plastic package with an operation junction temperature range
of -40°C to +125°C.
Related Literature
• AN1929, “ISL85413EVAL1Z, ISL85412EVAL1Z Evaluation
Boards”
• Wide input voltage range of 3.5V 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 switching frequency 700kHz
• Continuous output current up to 300mA
• Internal soft-start
• Minimal external components required
• Power-good and enable functions available
Applications
• Industrial control
• Medical devices
• Portable instrumentation
• Distributed power supplies
• Cloud infrastructure
• AN1931, “ISL85413DEMO1Z, ISL85412DEMO1Z Wide VIN
Synchronous Buck Regulator - Short Form”
MODE
VIN +3.5 ... +40V
GND
C1
20µF
VOUT
GND
MAX 300mA
C8
VOUT
C6
0.1µF
U1 ISL85413
1 MODE
2 BOOT
3 VIN
R1
FB 8
VCC
7
C5
1µF
PG 6
R2
C4
4 PHASE
fSW = 700kHz
EN 5
L1 Device must be
connected to GND
plane with Vias.
PG
EN
FIGURE 1. TYPICAL APPLICATION
100
90
80
70
1.5VOUT
3.3VOUT
60
1.0VOUT 1.2VOUT
1.8VOUT
2.5VOUT 5.0VOUT
50
40
0 0.03 0.06 0.09 0.12 0.15 0.18 0.21 0.24 0.27 0.30
OUTPUT LOAD (A)
FIGURE 2. EFFICIENCY vs LOAD, PFM, VIN = 12V
March 13, 2015
FN8379.1
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 2014, 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.
1 page  
ISL85413
Absolute Maximum Ratings
VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +43V
PHASE to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VIN + 0.3V (DC)
PHASE to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2V to 44V (20ns)
EN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +43V
BOOT to PHASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +5.5V
COMP, FS, PG, MODE, SS, VCC to GND. . . . . . . . . . . . . . . . . . -0.3V to +5.9V
FB to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +2.95V
Junction Temperature Range at 0A . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
ESD Rating
Human Body Model (Tested per JESD22-A114) . . . . . . . . . . . . . . . .2.5kV
Charged Device Model (Tested per JESD22-C101E). . . . . . . . . . . . . . 1kV
Machine Model (Tested per JESD22-A115). . . . . . . . . . . . . . . . . . . . 200V
Latch-up (Tested per JESD-78A; Class 2, Level A) . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance
JA (°C/W) JC (°C/W)
TDFN Package (Notes 4, 5) . . . . . . . . . . . . .
47
4
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . .+150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Operating Junction Temperature Range . . . . . . . . . . . . . .-40°C to +125°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Recommended Operating Conditions
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3.5V to +40V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379 for details.
5. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications TJ = -40°C to +125°C, VIN = 3.5V to 40V, unless otherwise noted. Typical values are at TA = +25°C. Boldface
limits apply across the junction temperature range, -40°C to +125°C
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
(Note 8)
MAX
TYP (Note 8) UNITS
SUPPLY VOLTAGE
VIN Voltage Range
VIN Quiescent Supply Current
VIN Shutdown Supply Current
VCC Voltage
POWER-ON RESET
VIN
IQ VFB = 0.7V, MODE = 0V
ISD EN = 0V, VIN = 40V (Note 6)
VCC VIN = 40V
VIN = 12V; IOUT = 0A to 10mA
3.5
4.5
4.35
40 V
50 µA
1.8 2.5 µA
5.1 5.5 V
5
5.45
V
VCC POR Threshold
Rising Edge
Falling Edge
2.76
3.3
3.46
V
3V
OSCILLATOR
Nominal Switching Frequency
Minimum Off-Time
Minimum On-Time
ERROR AMPLIFIER
fSW
tOFF VIN = 3.5V
tON (Note 9)
600 700 784 kHz
130 ns
90 ns
Error Amplifier Transconductance Gain
gm
50 µA/V
FB Leakage Current
Current Sense Amplifier Gain
FB Voltage
VFB = 0.6V
RT
TA = -40°C to +125°C
0.84
0.589
1
0.93
0.599
100
1.02
0.606
nA
V/A
V
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5
FN8379.1
March 13, 2015
5 Page 
ISL85413
Typical Performance Curves VIN = 12V, VOUT = 3.3V, fSW = 700kHz, TA = +25°C, CIN = 20µF,
COUT = 22µF (Continued)
PHASE 10V/DIV
PHASE 10V/DIV
VOUT 2V/DIV
VEN 10V/DIV
PG 5V/DIV
1ms/DIV
FIGURE 25. START-UP AT 300mA, PFM
VOUT 2V/DIV
VEN 10V/DIV
PG 5V/DIV
5ms/DIV
FIGURE 26. SHUTDOWN AT 300mA, PFM
VIN 10V/DIV
VOUT 1V/DIV
IL 200mA/DIV
PG 5V/DIV
1ms/DIV
FIGURE 27. START-UP VIN AT 300mA LOAD, PFM
VIN 10V/DIV
VOUT 2V/DIV
IL 200mA/DIV
PG 5V/DIV
1ms/DIV
FIGURE 28. START-UP VIN AT 300mA LOAD, PWM
VIN 10V/DIV
VOUT 2V/DIV
IL 200mA/DIV
PG 5V/DIV
5ms/DIV
FIGURE 29. SHUTDOWN VIN AT 300mA LOAD, PFM
VIN 10V/DIV
VOUT 2V/DIV
IL 200mA/DIV
PG 5V/DIV
5ms/DIV
FIGURE 30. SHUTDOWN VIN AT 300mA LOAD, PWM
Submit Document Feedback 11
FN8379.1
March 13, 2015
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ISL85413.PDF ] | |
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