600kHz 3A Step-Down Switching Regulator
FEATURES
Integrated 3 Amp switch
600kHz frequency of operation
Current mode controller
Precision enable threshold
Available in SOP8-PP Package
TJ4519
SOP8-PP PKG
APPLICATION
XDSL Modems
CPE equipment
DC-DC point of load applications
Portable equipment
ORDERING INFORMATION
Device (Marking)
TJ4519DP
Package
SOP8-PP
DESCRIPSION
The TJ4519 is a current mode switching regulator with an integrated switch, operating at 600kHz with enable
functions. The integrated switch allows for cost effective low power solutions (peak switch current 3 amps).
High frequency of operation allows for very small passive components. Current mode operation allows for fast
dynamic response and instantaneous duty cycle adjustment as the input varies (ideal for CPE applications
where the input is a wall plug power). The low shutdown current makes it ideal for portable applications where
battery life is important.
Absolute Maximum Ratings
CHARACTERISTIC
Input Supply Voltage
Boost Pin Above V
SW
Boost Pin Voltage
EN Pin Voltage
FB Pin Voltage
FB Pin Current
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 5 sec
SYMBOL
V
IN
V
BST
- V
SW
V
BST
V
EN
V
FB
I
FB
T
A
T
J
T
STG
T
SOL
MIN.
-0.3
-
-0.3
-0.3
-0.3
-
-40
-40
-65
-
MAX.
28
16
32
24
6
1
85
150
150
260
UNIT
V
V
V
V
V
mA
℃
℃
℃
℃
(1) For proper operation of device, V
IN
should be within Max. Operating Input Voltage as defined in Electrical Characteristics.
Ordering Information
Order No.
TJ4519DP-8L
Package
SOP8-PP
Description
600kHz 3A Step-Down Regulator
Package Marking
TJ4519
Supplied As
Reel
Jul. 2010 – Preliminary
-1-
HTC