ISL97519 Datasheet PDF - Intersil

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ISL97519
Intersil

Part Number ISL97519
Description 600kHz/1.2MHz PWM Step-Up Regulator
Page 9 Pages


ISL97519 datasheet pdf
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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, 200mMOSFET, 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, 200mPower 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.



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ISL97519
Absolute Maximum Ratings (TA = +25°C)
LX to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27V
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.5V
COMP, FB, EN, SS, FSEL to GND . . . . . . . . . . . . . . . . . .-0.3V to (VDD + 0.3V)
Thermal Information
Thermal Resistance (Typical, Note 4)
JA (°C/W)
8 Lead MSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
160
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Operating Ambient Temperature . . . . . . . . . . . . . . . . . . . .-40°C to +105°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .+135°C
Power Dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
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.
NOTE:
4. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise
noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications VIN = 3.3V, VOUT = 12V, IOUT = 0mA, FSEL = GND, TA = -40°C to +105°C Unless Otherwise Specified.
Boldface limits apply over the operating temperature range, -40°C to +105°C.
PARAMETER
DESCRIPTION
CONDITIONS
MIN MAX
(Note 5) TYP (Note 5) UNIT
IQ1 Quiescent Current - Shutdown
IQ2 Quiescent Current - Not Switching
IQ3 Quiescent Current - Switching
VFB Feedback Voltage
IB-FB
VDD
DMAX - 600kHz
DMAX - 1.2MHz
ILIM
IEN
rDS(ON)
ILX-LEAK
VOUT/VIN
VOUT/IOUT
fOSC1
fOSC2
VIL
VIH
GM
VDD-ON
HYS
ISS
OTP
Feedback Input Bias Current
Input Voltage Range
Maximum Duty Cycle
Maximum Duty Cycle
Current Limit - Max Peak Input Current
Shutdown Input Bias Current
Switch ON-Resistance
Switch Leakage Current
Line Regulation
Load Regulation
Switching Frequency Accuracy
Switching Frequency Accuracy
EN, FSEL Input Low Level
EN, FSEL Input High Level
Error Amp Tranconductance
VDD UVLO On Threshold
VDD UVLO Hysteresis
Soft-Start Charge Current
Over-Temperature Protection
EN = 0V
EN = VDD, FB = 1.3V
EN = VDD, FB = 1.0V
TA = -40°C to +85°C
TA = -40°C to +105°C
FSEL = 0V
FSEL = VDD
EN = 0V
VDD = 2.7V, ILX = 1A
VSW = 27V
3V < VIN < 5.5V, VOUT = 12V
VIN = 3.3V, VOUT = 12V, IO = 30mA to 200mA
FSEL = 0V
FSEL = VDD
I = 5µA
1.281
1.276
2.3
85
85
1.5
500
1000
1.5
70
2.1
4
1
0.7
3
1.294
1.294
0.01
92
90
2.0
0.01
0.2
0.01
0.2
0.3
620
1250
130
2.2
100
6
150
5
4
1.307
1.307
0.5
5.5
0.5
3
740
1500
0.5
150
2.3
8
µA
mA
mA
V
V
µA
V
%
%
A
µA
µA
%
%
kHz
kHz
V
V
1µ/
V
mV
µA
°C
NOTE:
5. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
2 FN6454.4
February 16, 2012



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Block Diagram
VDD
REFERENCE
GENERATOR
ISL97519
FSEL
OSCILLATOR
EN SS
SHUTDOWN
AND START-UP
CONTROL
COMPARATOR
PWM LOGIC
CONTROLLER
CURRENT
SENSE
COMP
GM
AMPLIFIER
FET
DRIVER
LX
GND
FB
Pin Descriptions
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
COMP
FB
EN
GND
LX
VDD
FSEL
SS
DESCRIPTION
Compensation pin. Output of the internal error amplifier. Capacitor and resistor from COMP pin to ground.
Voltage feedback pin. Internal reference is 1.294V nominal. Connect a resistor divider from VOUT.
VOUT = 1.294V (1 + R1/R2). See “Typical Application Circuit”.
Shut-down control pin. Pull EN low to turn off the device.
Analog and power ground.
Power switch pin. Connected to the drain of the internal power MOSFET.
Analog power supply input pin.
Frequency select pin. When FSEL is set low, switching frequency is set to 620kHz. When connected to high or
VDD, switching frequency is set to 1.25MHz.
Soft-start control pin. Connect a capacitor to control the converter start-up.
Typical Application Circuit
R3
3.9k
C5
4.7nF
R1 85.2k
R2
10k
1 COMP
2 FB
3 EN
SS 8
FSEL 7
VDD 6
4 GND
LX 5
S1
C3
27nF
C4 + C1
0.1µF 22µF
2.3V TO 5.5V
10µH
D1
+ C2
22µF
12V
3 FN6454.4
February 16, 2012



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ISL97519
Typical Performance Curves
95
90
85
VIN = 5V, VO = 12V, fs = 1.25MHz
80
VIN = 5V, VO = 12V, fs = 620kHz
75
70 VIN = 5V, VO = 9V, fs = 620kHz
65 VIN = 5V, VO = 9V, fs = 1.25MHz
60
0
200 400 600 800
IOUT (mA)
FIGURE 1. BOOST EFFICIENCY vs IOUT
1000
92
VIN = 3.3V, VO = 9V,
90 fs = 620kHz
88
86
84
82 VIN = 3.3V, VO = 12V,
80 fs = 620kHz
VIN = 3.3V, VO = 12V,
78 fs = 1.25MHz
76 VIN = 3.3V, VO = 9V,
fs = 1.25MHz
74
0 100 200 300 400 500
IOUT (mA)
FIGURE 2. BOOST EFFICIENCY vs IOUT
0.9
0.8 VIN = 5V, VO = 12V,
fs = 1.25MHz
0.7
VIN = 5V, VO = 9V,
fs = 1.25MHz
0.6 VIN = 5V, VO = 9V,
0.5 fs = 620kHz
0.4
0.3
0.2
0.1
0
0
VIN = 5V, VO = 12V,
fs = 620kHz
200 400 600
800
IOUT (mA)
FIGURE 3. LOAD REGULATION vs IOUT
1000
0.7
VIN = 3.3V, VO = 12V,
0.6 fs = 1.25MHz
VIN = 3.3V, VO = 9V,
fs = 1.25MHz
0.5
VIN = 3.3, VO = 9V,
0.4 fs = 1.25MHz
0.3
0.2
0.1
0
0
VIN = 3.3, VO = 12V,
fs = 620kHz
100 200 300 400
IOUT (mA)
FIGURE 4. LOAD REGULATION vs IOUT
500
0.6
0.5
0.4 VO = 9V, IO = 80mA
fs = 1.25MHz
0.3
VO = 12V, IO = 80mA
0.2 fs = 1.25MHz
VO = 9V, IO = 100mA
fs = 620kHz
0.1
0
-0.1
2
VO = 12V, IO = 80mA
fs = 620kHz
345
VIN (V)
FIGURE 5. LINE REGULATION vs VIN
4
6
VO = 12V
IO = 50mA TO 300mA
VIN = 3.3V
fs = 600kHz
FIGURE 6. TRANSIENT RESPONSE
FN6454.4
February 16, 2012



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