廬
ISL6401
Data Sheet
September 2002
FN9007.3
PRELIMINARY
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 over-current 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(chǔ) in
the shutdown mode.
Features
鈥?Positive and Negative Output Regulation
鈥?Starting Supply Current . . . . . . . . . . . . . . . . . 100碌A(chǔ) (typ.)
鈥?Quiescent Current . . . . . . . . . . . . . . . . . . . . . . 55碌A(chǔ) (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
Applications
鈥?VoIP/VoDSL Ringer and Off-Hook Voltage Generators
鈥?Multi-Output Flyback Supplies
鈥?Cable and DSL Modems
鈥?Set-Top Boxes
Ordering Information
PART NUMBER
ISL6401CB
ISL6401IB
ISL6401CR
ISL6401IR
TEMP. RANGE
(
o
C)
0 to 70
-40 to 85
0 to 70
-40 to 85
PACKAGE
14 Ld SOIC
14 Ld SOIC
16 Ld MLFP
16 Ld MLFP
PKG. NO.
M14.15
M14.15
L16.4x4
L16.4x4
鈥?Wireless Local Loops
鈥?LMDH and FTTH Supplies
鈥?Boost Regulators
鈥?Routers
Add -T suffix for tape and reel packaging.
Pinouts
ISL6401 (SOIC)
TOP VIEW
SD
1
14 V
CC
13 PV
CC
12 GATE
11 PGND
10 GND
9 CS
8 NC
SYNC
CT
COMP
FB
1
2
3
4
5
NFB OUT
6
NFB IN
7
NC
8
NC
ISL6401 (MLFP)
TOP VIEW
PVCC
14
GATE
13
12 PGND
11 PGND
10 GND
9
CS
VCC
15
SD
16
SYNC 2
CT 3
COMP 4
FB 5
NFB OUT 6
NFB IN 7
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002. All Rights Reserved
1
2
3
4
5
6
7
8
9
10
11
