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ISL6401
Data Sheet
April 13, 2005
FN9007.7
Synchronizing Current Mode PWM for
Subscriber Line Interface Circuits (SLICs)
The ISL6401 adjustable frequency, low power, pulse width
modulating (PWM) current mode controller is designed for a
wide range of DC/DC conversion applications including
boost, flyback, and isolated output configurations. The
device is optimized to provide a high performance, low-cost
solution for Ringing SLIC (RSLIC) ring and talk power
supplies. An integrated inverter allows for easy design of
negative voltage regulation circuits with a minimal amount of
external components. Internal soft-start minimizes start-up
stress without any external components. Peak current mode
control effectively handles Ring trip transients and provides
inherent overcurrent protection.
This advanced BiCMOS design features low operating
current, adjustable operating output frequency (50kHz to
600kHz), internal soft-start and a SYNC input that allows the
oscillator to be locked to an external clock for noise sensitive
applications. DC/DC conversion efficiency is optimized by
use of a low current sense voltage. A logic level shutdown
input is included, which reduces supply current to 55碌A in
the shutdown mode.
Features
鈥?Positive and Negative Output Regulation
鈥?Starting Supply Current . . . . . . . . . . . . . . . . . 100碌A (typ.)
鈥?Quiescent Current . . . . . . . . . . . . . . . . . . . . . . 55碌A (typ.)
鈥?Output Frequency Range. . . . . . . . . . . . 50kHz to 600kHz
鈥?External Clock Synchronization
鈥?Fast Transient Response with Peak Current Mode Control
鈥?Internal Soft-Start
鈥?Drives N-Channel MOSFET
鈥?Logic Level Shutdown
鈥?Leading Edge Blanking
鈥?1% Tolerance Voltage Reference Over Line and
Temperature
鈥?Pb-Free Available (RoHS Compliant)
Applications
鈥?VoIP/VoDSL Ringer and Off-Hook Voltage Generators
鈥?Multi-Output Flyback Supplies
鈥?Cable and DSL Modems
鈥?Set-Top Boxes
Pinouts
ISL6401 (SOIC)
TOP VIEW
SD
1
14 V
CC
13 PV
CC
12 GATE
11 PGND
10 GND
9 CS
8 NC
鈥?Wireless Local Loops
鈥?LMDH and FTTH Supplies
鈥?Boost Regulators
鈥?Routers
SYNC 2
CT 3
COMP 4
FB 5
NFB OUT 6
NFB IN 7
Ordering Information
PART NUMBER
ISL6401CB
ISL6401CBZ (Note)
ISL6401CR
ISL6401CRZ (Note)
TEMP.
RANGE (掳C)
-40 to 85
-40 to 85
-40 to 85
-40 to 85
PACKAGE
14 Ld SOIC
14 Ld SOIC (Pb-free)
16 Ld 4x4 QFN
PKG.
DWG. #
M14.15
M14.15
L16.4x4
ISL6401 (QFN)
TOP VIEW
PVCC
GATE
VCC
SD
16
SYNC
CT
COMP
FB
1
2
3
4
5
NFB OUT
15
14
13
12 PGND
11 PGND
10 GND
9 CS
16 Ld 4x4 QFN (Pb-free) L16.4x4
Add -T suffix for tape and reel packaging.
NOTES:
1. The parts with suffix 鈥楥鈥?are being tested to the industrial temperature
grade. This has been updated in the table above. The IB and IR parts are
being discontinued. The affected parts are: ISL6401IB, ISL6401IBZ,
ISL6401IB-T, ISL6401IBZ-T, ISL6401IR, ISL6401IRZ, ISL6401IR-T,
ISL6401IRZ-T.
2. Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination
finish, which are 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.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2001-2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
6
NFB IN
7
NC
8
NC
1
1
2
3
4
5
6
7
8
9
10
11
