|
Excellent Semiconductor |
Excellent Semiconductor
EX34063
FEATURES
n operation from 3.0 to 40V input
n short circuit current limiting
n low standby current
n output switch current of 1.5A
n output voltage adjustable
n frequency of operation from 100Hz to
100KHz
n step-up, step-down or inverting switching
regulators
n current limiting
DIP-8
SOP-8
PRODUCT DESCRIPTION
The EX34063 is a monolithic control circuit containing the primary functions required for
DC-to-DC converters. This device consists of an internal temperature compensated reference,
comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current
output switch.
This device was specifically designed to be incorporated in Step-Down and Step-Up and
Voltage-inverting applications with a minimum number of external components.
PIN CONFIGURATION
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
Driver
Collector
IPKSENSE
Vcc
Comparator
Inverting
Input
ORDERING INFORMATION
Part
Number
Operating
Temperature
Range
Package
Type
EX34063 0~+70
DIP- 8
EX34063S 0~+70 SOP- 8
1/8
Excellent Semiconductor
EX34063
ABSOLUTE MAXIMUM RATING
Characteristic
Symbol
Value
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
VCC
VIR
VC(switch)
40
-0.3 to +40
40
Switch Emitter Voltage (VPin 1=40V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
VE(switch)
VCE(switch)
VC(driver)
40
40
40
Driver Collector Current (Note 1)
Switch Current
Power Dissipation and Thermal Characteristics
Plastic Package TA=25
SOIC Package TA=25
Operating Junction Temperature
Operating Ambient Temperature Range
IC(driver)
ISW
PD
R JA
PD
R JA
TJ
TA
100
1.5
1.25
100
0.625
100
+150
0 to +70
Storage Temperature Range
Tstg -65 to +150
NOTES: 1. Maximum package power dissipation limits must be observed. 2. ESD data available upon request.
BLOCK DIAGRAM
8
Drive
Collector
7
Ipk
Sense
S
R
Ipk
Oscillator
CT
1
Switch
Collector
Q Q2 Q1
100
2
Switch
Emitter
6
Vcc
5
Comparator
Inverting
Input
Comparator
+
-
1.25V
Reference
Regulator
3
Timing
Capacitor
4
GND
Unit
V
V
V
V
V
V
mA
A
W
/W
W
/W
2/8
|