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PDF ISL97519 Data sheet ( Hoja de datos )
| Número de pieza | ISL97519 | |
| Descripción | 600kHz/1.2MHz PWM Step-Up Regulator | |
| Fabricantes | Intersil | |
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RECOMMOEBNSDOELIDESLTR9EE7P5P1RL9AOACDEUMCETNT PART
1% Output Accuracy 600kHz/1.2MHz PWM Step-Up
Regulator
ISL97519
The ISL97519 is a high frequency, high efficiency step-up
voltage regulator operated at constant frequency PWM mode.
With an internal 2.0A, 200m MOSFET, it can deliver up to 1A
output current at over 90% efficiency. The selectable 600kHz
and 1.2MHz allows smaller inductors and faster transient
response. An external compensation pin gives the user greater
flexibility in setting frequency compensation allowing the use
of low ESR ceramic output capacitors.
When shut down, it draws <1µA of current and can operate
down to 2.3V input supply. These features, along with 1.2MHz
switching frequency, make it an ideal device for portable
equipment and TFT-LCD displays.
The ISL97519 is available in an 8 Ld MSOP package with a
maximum height of 1.1mm. The device is specified for
operation over the full -40°C to +105°C temperature range.
Pin Configuration
ISL97519
(8 LD MSOP)
TOP VIEW
COMP 1
FB 2
EN 3
GND 4
8 SS
7 FSEL
6 VDD
5 LX
Features
• 1% Output Accuracy
• >90% Efficiency
• 2.0A, 200m Power MOSFET
• 2.3V to 5.5V Input
• 1.1*VIN to 25V Output
• 600kHz/1.2MHz Switching Frequency Selection
• Adjustable Soft-Start
• Internal Thermal Protection
• 1.1mm Max Height 8 Ld MSOP Package
• Pb-Free (RoHS compliant)
• Halogen Free
Applications
• TFT-LCD displays
• DSL modems
• PCMCIA cards
• Digital cameras
• GSM/CDMA phones
• Portable equipment
• Handheld devices
Ordering Information
PART
NUMBER
(Notes 2, 3)
PART
MARKING
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL97519IUZ
7519Z
8 Ld MSOP
M8.118A
ISL97519IUZ-T
7519Z
8 Ld MSOP
M8.118A
ISL97519IUZ-TK
7519Z
8 Ld MSOP
M8.118A
NOTES:
1. 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 ISL97519. For more information on MSL please see
techbrief TB363.
February 16, 2012
FN6454.4
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 2007-2009, 2012. 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  
ISL97519
Typical Performance Curves (Continued)
VO = 12V
IO = 50mA TO 300mA
VIN = 3.3V
fs = 1.2MHz
FIGURE 7. TRANSIENT RESPONSE
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
1.0
0.9
0.8 870mW
0.7
0.6
0.5
0.4
JA = +1M6S0°OCP/W8
0.3
0.2
0.1
0
0
25
50
75 85 100
125
AMBIENT TEMPERATURE (°C)
FIGURE 8. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
0.6
0.5
486mW
0.4
0.3
0.2
JA = +2M0S6O°CP/W8
0.1
0.0
0
25
50
75 85 100
125
AMBIENT TEMPERATURE (°C)
FIGURE 9. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
Applications Information
The ISL97519 is a high frequency, high efficiency boost
regulator operated at constant frequency PWM mode. The
boost converter stores energy from an input voltage source
and delivers it to a higher output voltage. The input voltage
range is 2.3V to 5.5V and the output voltage range is 5V to
25V. The switching frequency is selectable between 600kHz
and 1.2MHz allowing smaller inductors and faster transient
response. An external compensation pin gives the user greater
flexibility in setting output transient response and tighter load
regulation. The converter soft-start characteristic can also be
controlled by the external CSS capacitor. The EN pin allows the
user to completely shut-down the device.
Boost Converter Operations
Figure 10 shows a boost converter with all the key
components. In steady-state operating and continuous
conduction mode where the inductor current is continuous, the
boost converter operates in two cycles. During the first cycle,
as shown in Figure 11, the internal power FET turns on and the
Schottky diode is reverse biased and cuts off the current flow
to the output. The output current is supplied from the output
capacitor. The voltage across the inductor is VIN and the
inductor current ramps up in a rate of VIN/L, L is the
inductance. The inductance is magnetized and energy is stored
in the inductor. The change in inductor current is shown in
Equation 1:
IL1 = t1 -V--L-I--N--
t1 = f---S-D--W---
D = Duty Cycle
VO = C-I--O-O---U-U---T-T t1
(EQ. 1)
5 FN6454.4
February 16, 2012
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet ISL97519.PDF ] | |
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