ISL6719 Datasheet PDF - Intersil

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ISL6719
Intersil

Part Number ISL6719
Description 100V Linear Bias Supply
Page 9 Pages


ISL6719 datasheet pdf
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100V Linear Bias Supply
ISL6719
The ISL6719 is a low cost linear regulator for generating a low
voltage bias supply from intermediate distributed voltages
commonly used in telecom and datacom applications. It
provides a single adjustable output rated at 100mA from
either the input source or an auxiliary source such as a
transformer winding. The auxiliary source is selected whenever
it has sufficient voltage to sustain the output.
The ISL6719 may be used as a start-up or a continuous low
power regulator. When operating as a start-up regulator, it is
capable of sourcing 100mA from a 100V source for short
durations. This period of time allows the power supply to
start-up and provide an alternate power source, such as the
output of a transformer winding, to the AUXIN input. This
allows the regulated output to operate from a lower source
voltage to minimize power loss.
Features
• 100V+ input capability
• Adjustable output from 1.5V to 20V
• Up to 100mA output current
• Overcurrent protection
• Over-temperature protection
• ENABLE and ENABLE_N inputs
• Package compliant with IPC2221A, creepage and clearance
spacing requirements
Applications
• Telecom/datacom DC/DC converters
• Low power bias supplies
Pin Configuration
ISL6719
(9 LD DFN)
TOP VIEW
VPWR 1
AUXIN 2
VSW 3
VSW_FB 4
9 GND
8 ENABLE_N
7 ENABLE
6 COMPB
5 COMPA
Ordering Information
PART NUMBER
(Note 1, 2, 3)
PART MARKING
TEMP RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL6719ARZ
19AZ
-40 to +105
9 Ld DFN
L9.3x3
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 ISL6719. For more information on MSL, please see tech brief TB363.
July 15, 2014
FN6555.2
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, 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.



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Functional Block Diagram
VPWR
105V MAX
GND
START/STOP
UV COMPARATOR
BG +-
+
-
VPWR OK
TEMP OK
TMON
+150ºC TRIP
+95ºC CLEAR
ENABLE
INPUT
SELECTOR
VSW
REGULATOR
INT. BIAS
INT. BIAS
POR
INT-ENABLE
-
+
BG
0V TO 40V
AUXIN
1.5V TO 20V
@ 100mA
VSW
+ 1.5V REF
_
INT. BIAS
VSW_FB
COMPA
COMPB
ENABLE
ENABLE_N



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Typical Application
VIN+
17V TO 100V
VIN-
ENABLE
DISABLE
1 VPWR GND 9
AUXIN
2
ENABLE_N 8
ENABLE 7
3 VSW COMPB 6
4 COMPA 5
R1 VSW_FB
ISL6719
C3
220pF
C1 C2
1.0F
R2
CONVERTER POWER STAGE
+VOUT
PWM
RETURN
FEEDBACK
AMPLIFIER



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ISL6719
Absolute Maximum Ratings
Supply Voltage, VPWR . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to + 105V
AUXIN, VSW_FB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to + 40V
COMPB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to + 30V
VSW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to + 25V
All Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to + 6.0V
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +105°C
Supply Voltage Range (Typical). . . . . . . . . . . . . . . . . . . . . 18VDC to 80VDC
Thermal Information
Thermal Resistance (Typical)
JA (°C/W) JC (°C/W)
9 Ld DFN (Notes 4, 5). . . . . . . . . . . . . . . . . .
54
2.8
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . -55°C to +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . -65°C to +150°C
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.
NOTES:
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.
5. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.
6. All voltages are with respect to GND.
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram” on page 2
and “Typical Application” on page 3. 17V < VPWR < 100V, CVSW = 1µF, IVSW = -3mA, VSW Enabled, TA = -40°C to +105°C (Note 7), Typical values are at
TA = +25°C.
PARAMETER
TEST CONDITIONS
MIN MAX
(Note 8)
TYP
(Note 8)
UNITS
SUPPLY VOLTAGE (VPWR)
Supply Voltage
100 V
Start-Up Current (IVPWR)
Operating Current (IVPWR)
VPWR = 12V
VSW Enabled, VPWR = 100V, VSW = 10V, 20V,
IVPWR - IVSW
VSW Disabled, VPWR = 100V,
250 450
1.1 2.0
1.1 2.0
µA
mA
mA
UVLO START Threshold
AUXIN Biased at 40V, VSW Enabled,
VPWR = 100V, VSW = 10V, 20V,
IVSW = -100mA
VSW Disabled
1.1 2.0 mA
13.0
16.5
V
UVLO STOP Threshold
VSW Disabled
12.0
15.0
V
Hysteresis
UVLO START - UVLO STOP
0.8 1.2 1.7
V
AUXILIARY VOLTAGE (AUXIN)
Maximum Bias
VPWR = 17V, 100V
40 V
OUTPUT VOLTAGE (VSW)
Load Capacitance Range
(Note 9)
0.47 1.0
1.5
µF
Overall Accuracy
Setpoint Range
VPWR = 18V, 100V, VSW = 5V, 10V, 12V
AUXIN = 15V, IVSW = -3mA to -100mA
VPWR = 100V, AUXIN = 30V
-5
1.55
+5 %
20 V
Reference
VSW_FB = VSW
1.45
1.50
1.55
V
Source Voltage Headroom (AUXIN - VSW)
VPWR = 17V, VSW = 10V, IAUXIN = 0.95*IVSW
IVSW = -100mA
IVSW = -50mA
1.8 3.0
1.4 2.0
V
V
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4
FN6555.2
July 15, 2014



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