ET-34063A Datasheet PDF - ETC

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ET-34063A
ETC

Part Number ET-34063A
Description DC to DC Converter Control Circuits
Page 3 Pages


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ET-34063A
DC to DC Converter Control Circuits
DESCRIPTION
The MC34063A Series is a monolithic control circuit containing the primary functions required
for DC-to-DC converters. These devices consist of an internal temperature compensated reference,
comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high
current output switch. This series was specifically designed to be incorporated in Step-Down and
Step-Up and Voltage-Inverting applications with a minimum number of external components.
FEATURES
Operation from 3.0 V to 40 V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5 A
Output Voltage Adjustable
Frequency Operation to 100 kHz
Precision 2% Reference
ABSOLUTE MAXIMUM RATINGS
Rating
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (VPIN 1=40V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collect Current (Note 1)
Switch Current
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
Symbol
VCC
VIR
VC(switch)
VE(switch)
VCE(switch)
VC(driver)
IC(driver)
ISW
TJ
TA
Tstg
Value
40
-0.3 to +40
40
40
40
40
100
1.5
+150
0 to +70
-65 to +150
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
A



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ET- 34063A
ELECTRICAL CHARACTERISTICS
(Vcc=5.0 V, Ta=Tlow to Thigh, unless otherwise specified.)
Characteristics
Symbol Min
OSCILLATOR
Frequency
fOSC 24
(Vpin5=0V, CT=1.0nF, TA=25 )
Charge Current (VCC=5.0V to 40V, TA=25 )
lchg 24
Discharge Current (VCC=5.0V to 40V, TA=25 )
ldischg
140
Discharge to Charge Current Ratio (Pin 7 to VCC, TA=25 ) ldischg/lchg 5.2
Current Limit Sense Voltage (lcha=ldischa; TA=25 )
Vipk(sence) 250
OUTPUT SWITCH (NOTE 2)
Saturation Voltage, Darlington Connection
(lSW=1.0A, Pins 1, 8 connected)
Saturation Voltage, Darlington Connection
(lSW=1.0A, Rpin8=82 to VCC, Forced
20)
VCE(sat)
VCE(sat)
---
---
DC Current Gain (lSW=1.0A, VCE=5.0V, TA=25 )
hFE 50
Collector Off-State Current (VCE=40V)
lC(off)
---
COMPARATOR
Threshold Voltage (TA=25 ) (TA=Tlow to Thigh)
Vth 1.225
1.21
Threshold Voltage Line Regulation (Vcc=3.0V to 40V)
Input Bias Current (Vin=0V)
Regline
lIB
---
---
TOTAL DEVICE
Supply Current ( VCC=5.0V to 40V, CT=1.0nF, Pin 7= VCC ,
Vpin5>Vth, Pin2=Gnd, remaining pins open)
lCC
---
Type
33
35
220
6.5
300
1.0
0.45
75
40
1.25
---
1.4
-20
---
Max
42
42
260
7.5
350
1.3
0.7
---
100
1.275
1.29
5.0
-400
4.0
NOTES:
1. Maximum package power dissipation limits must be observed.
2. Low duty cycle pulse techniques are used during test to maintain junction temperature
as close to ambient temperature as possible.
Unit
kHz
A
A
---
mV
V
V
---
A
V
mV
nA
mA



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Ordering Info
Package
DIP-8
SOP-8
ET34063
Package
Package:
D: DIP-8
E: SOP-8
Packing type
TB
Type
ET34063D
ET34063E
Packing type
TB
TB



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ET-34063A DC to DC Converter Control Circuits ET-34063A
ETC
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