APW38HC42 Datasheet, PDF (1/11 Pages) Anpec Electronics Coropration – CMOS Current-Mode PWM Voltage Controller

APW38HC42A/3A/4A/5A
CMOS Current-Mode PWM Voltage Controller
Features
• Ultralow start-up current (25µA typical)
• Low operating current (2mA typical)
• Fast output rise/fall times :
−15ns rise/10ns fall
• High output drive (1.2A peak current)
• CMOS outputs with rail-to-rail swing
• Current-mode operation up to 1MHz
• Trimmed 5V bandgap reference
• Pin-to-pin compatible with MIC38HC4X
• Trimmed oscillator discharge current
• UVLO with hysteresis
• Low cross-conduction currents
Applications
General Description
The APW38HC4XA family are fixed frequency, high
performance, current-mode PWM controller with 1.2
A drive current capability. Undervoltage lockout cir-
cuitry allows the APW38HC42A and APW38HC44A
versions to start up at 14.5V and operate down to
9V, and the APW38HC43A and APW38HC45A ver-
sions start at 8.4V with operateion down to 7.6V. All
versions operate up to 24V. The ultra low start-up
current 25µA (typical), and operating current 2mA
(typical) have been designed to improve the converter
efficiency. High output driving capability up to 1.2A
ensures the fast switching to minimize the switching
losses. The APW38HC4XA features a trimmed and
temperature compensated oscillator discharge cur-
rent and bandgap reference. APW38HC4XA is avail-
able in both 8-pin plastic DIP and SOP packages.
Pin Description
• Current-mode , Off-line , Switched-mode Power
Supplies
• Current-mode , DC-to-DC converters
• Various converters ( step-down, step-up, flyback
, forward, and synchronous FET)
COMP
1
FB
2
ISNS
3
RT/CT
4
8
VREF
7
VDD
6
OUT
5
GND
Ordering and Marking Information
APW 38HC4XA
Lead Free Code
Handling Code
Temp. Range
Package Code
Package Code
J : DIP - 8
K : SOP-8
Temp. Range
C : 0 to 70 ^°C
I : -40 to 85 °C
Handling Code
TU : Tube
TR : Tape & Reel
Lead Free Code
L : Lead Free Device Blank : Original Device
APW384XA J :
APW 38HC4XA
XXXXX
X - 2/3/4/5
XXXXX - Date Code
APW384XA K :
APW 38HC4XA
X - 2/3/4/5
XXXXX - Date Code
XXXXX
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright  ANPEC Electronics Corp.
1
Rev. A.7 - Jan., 2003
www.anpec.com.tw