intersil ISL6719 DATA SHEET
®
ISL6719
Data Sheet October 1, 2007
100V Linear Bias Supply
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.
Ordering Information
PART
NUMBER
(Note)
ISL6719ARZ* 19AZ -40 to +105 9 Ld DFN L9.3x3
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
NOTE: 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.
PART
MARKING
TEMP.
RANGE (°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
FN6555.1
Features
• 100+ Volt 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
• Pb-Free (RoHS Compliant)
Applications
• Telecom/Datac om D C/ D C Conv e r te rs
• Low Power Bias Supplies
Pinout
ISL6719
(9 LD DFN)
TOP VIEW
VPWR
AUXIN
VSW
VSW_FB
1
2
3
4
GND
9
ENABLE_N
8
ENABLE
7
COMPB
6
COMPA
5
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
Functional Block Diagram
VPWR
105V MAX
2
VSW
POR
REGULATOR
INT . BIAS
-
+
GND
START/STOP
UV COMPARATOR
+
BG
-
+
-
TMON
+150ºC TRIP
+95ºC CLEAR
VPWR OK
TEMP OK
ENABLE
INP UT
SELECTOR
INT-ENABLE
INT. BIAS
INT . BIA S
1.5V REF
+
_
0V TO 40V
1.5V TO 20V
@ 100mA
AUXIN
VSW
VSW_FB
COMPA
COMPB
ENABLE
ENABLE_N
ISL6719
-
+
BG
October 1, 2007
FN6555.1
Typical Application
CONVERTER POWER STAGE
VIN
+
3
17V TO 100V
VIN-
ENABLE
DISABLE
1
VPWR
ENABLE_N
2
AUXIN
3
4
VSW_FB
R1
ISL6719
GND
ENABLE
COMPBVSW
COMPA
9
8
7
6
5
C3
220pF
PWM
FEEDBACK
AMP L IF IER
+VOUT
RETURN
ISL6719
C1
October 1, 2007
FN6555.1
C2
1.0μF
R2
Loading...