TJ4519 Datasheet, PDF (1/11 Pages) HTC Korea TAEJIN Technology Co. – 600kHz 3A Step-Down Switching Regulator

600kHz 3A Step-Down Switching Regulator
TJ4519
FEATURES
z Integrated 3 Amp switch
z 600kHz frequency of operation
z Current mode controller
z Precision enable threshold
z Available in SOP8-PP Package
SOP8-PP PKG
APPLICATION
z XDSL Modems
z CPE equipment
z DC-DC point of load applications
z 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
SYMBOL
MIN.
MAX.
Input Supply Voltage
V_IN
-0.3
28
Boost Pin Above V_SW
V_BST - V_SW
-
16
Boost Pin Voltage
V_BST
-0.3
32
EN Pin Voltage
V_EN
-0.3
24
FB Pin Voltage
V_FB
-0.3
6
FB Pin Current
I_FB
-
1
Operating Ambient Temperature Range
T_A
-40
85
Operating Junction Temperature Range
T_J
-40
150
Storage Temperature Range
T_STG
-65
150
Lead Temperature (Soldering) 5 sec
T_SOL
-
260
(1) For proper operation of device, V_IN should be within Max. Operating Input Voltage as defined in Electrical Characteristics.
UNIT
V
V
V
V
V
mA
℃
℃
℃
℃
Ordering Information
Order No.
Package
TJ4519DP-8L
SOP8-PP
Description
600kHz 3A Step-Down Regulator
Package Marking Supplied As
TJ4519
Reel
Jul. 2010 – Preliminary
-1-
HTC