MC34063A Datasheet PDF - AIC

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MC34063A
AIC

Part Number MC34063A
Description DC/DC CONVERTER CONTROL CIRCUIT
Page 9 Pages


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! FEATURES
" 3V to 30V Input Voltage Operation.
" Internal 1.6A Peak Current Switch.
" Internal ±1.8% Reference.
" Low Quiescent Current at 1.6mA.
" Frequency Operation from 100Hz to 100KHz.
" Current Limiting.
! APPLICATIONS
" Saver for Cellular phones
" DC-DC Converter Module
MC34063A
DC/DC CONVERTER CONTROL CIRCUIT
SPEC NO: DS34063A-00
! DESCRIPTION
The MC34063A by Analog Integrations
Corporation, an improved second source over the
industrial standard MC34063A, is a monolithic
control circuit containing the primary functions
required for DC/DC converters. The 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 is
specifically designed to be incorporated in step-
down, step-up and voltage-inverting applications
with a minimum number of external components.
The ±1.8% internal reference and low quiescent
current of 1.6mA are among the improvements of
the device over the competition.
! TYPICAL APPLICATION CIRCUIT
200µH
VOUT
*RS
VIN
+
C1 100µF
8
DRI
7
IPK
6
VCC
5
FB
1
SC
2
SE
3
TC
4
GND
CT
MC34063A
L
D1 +
1N5819
CO
8.6V SAVER
*:Io=0.3/RS
RB
33K
RA
5.6K
Saver Circuit for Cellular Phone
! ORDERING INFORMATION
MC34063A XX
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE
C: 0°C~+70°C
ORDER NUMBER
PIN CONFIGURATION
MC34063ACN
(PLASTIC DIP)
MC34063ACS
(PLASTIC SO)
TOP VIEW
SC 1
SE 2
TC 3
GND 4
8 DRI
7 IPK
6 VCC
5 FB
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
1



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MC34063A
! ABSOLUTE MAXIMUM RATINGS
DC/DC CONVERTER CONTROL CIRCUIT
SPEC NO: DS34063A-00
Supply Voltage ......................................................…………..................................... 30V
Comparator Input Voltage Range ..................................………….................... -0.3V~30V
Switch Collector Voltage .......................................……………......................................30V
Switch Emitter Voltage ..................................…………….............................................30V
Switch Collector to Emitter Voltage .....................…………..........................................30V
Driver Collector Voltage .................................……………............................................30V
Switch Current ............................................……………..............................................1.6A
Power Dissipation and Thermal Characteristics
DIP Package
Ta= 25°C ...............................………….............................1.0W
Thermal Resistance .................……….......................100°C /W
SO Package
Ta= 25°C.................................…………….......................625mW
Thermal Resistance .................……….......................160°C /W
Operating Junction Temperature ................................…………..….............................125°C
Operating Ambient Temperature Range .................……...…...............................0°C~70°C
Storage Temperature Range .....................……………....…........................... - 65°C~150°C
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
2



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MC34063A
DC/DC CONVERTER CONTROL CIRCUIT
SPEC NO: DS34063A-00
! ELECTRICAL CHARACTERISTICS (VCC= 5V, Ta=25°C, unless otherwise specified.)
PARAMETER
Oscillator
Charging Current
Discharge Current
Voltage Swing
Discharge to Charge Current
Ratio
TEST CONDITIONS
5.0VVCC30V
5.0VVCC30V
PIN 3
VIPK(SENSE) =VCC
SYMBOL MIN. TYP. MAX. UNIT
ICHG
10
IDISCHG
100
VOSC
IDISCHG/ ICHG
25
150
0.6
6.0
40
200
µA
µA
V
Current Limit Sense Voltage
Output Switch
ICHG=IDISCHG
VIPK(SENSE)
250
300
350
mV
Saturation Voltage, Darlington
Connection
ISW=1.0A;
VC(DRIVER)=VC(SWITCH)
Saturation Voltage
ISW=1.0A; IC(DRIVER)=50mA
(Forced β≅20)
DC Current Gain
Collector Off-State Current
ISW=1.0A; VCE=5.0V
VCE=30V
Comparator
Threshold Voltage
Threshold Voltage
0°CTa70°C
Threshold Voltage Line
Regulation
3.0VVCC30V
Input Bias Current
Supply current
VIN=0V
VIPK(SENSE)=VCC
VPIN 5>VFB
5.0VVCC30V
CT=0.001µF, PIN 2=GND
Remaining pins open
VCE(SAT)
1.0 1.3
V
VCE (SAT)
0.4 0.7
V
hFE
IC(OFF)
35 120
10
nA
VFB 1.227 1.25 1.273 V
1.21 1.29 V
REGLINE
0.1 0.3 mV/V
IIB 0.4 1 µA
ICC 1.6 3 mA
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
3



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MC34063A
DC/DC CONVERTER CONTROL CIRCUIT
SPEC NO: DS34063A-00
! TYPICAL PERFORMANCE CHARACTERISTICS
Output Switch ON-OFF Time vs. Oscillator
Timing Capacitor
VCC=5V
VIPK=VCC
PIN 5=GND
ON TIME
OFF TIME
Standby Supply Current vs. Supply Voltage
2
1.6
CT=1nF
1.2
VIPK=VCC
PIN 2=GND
0.8
0.4
0.1 1
10 100
CT, Oscillator Timing Capacitor (nF)
VFB, Threshold Voltage vs Temperature
1.3
VCC = 5V,
1.28
CT = 1nF
PIN 2 = GND
1.26
1.24
1.22
1.2
0 10 20 30 40 50 60 70 80
Temperature (°C)
0
0 5 10 15 20 25 30
VCC, Supply Voltage (V)
IPK Threshold Voltage vs Temperature
350
340 VCC = 5V
330 CT = 1nF
PIN 5 = GND
320
310
300
290
280
270
260
250
0
10 20 30 40 50 60 70 80
Temperature (°C)
Emmiter-Follower Configuration Output Switch
Saturation Voltage vs Emmiter Current
1.8
VCC = 5V
1.7 PIN 1, 7, 8 = VCC
PIN 3, 5 = GND
1.6
1.5
1.4
1.3
1.2
0 0.5 1 1.5
IE, Emitter Current (A)
Common-Emitter Configuration Output Switch
Saturation Voltage vs Collector Current
1.4 VVCCCC ==55.0VV
1.2 PPIINN 77 ==VVCCCC
PPINS22, ,33,,55==GGND
1.0 Forced Beta = 20
Darlington Connection
0.8
0.6
0.4
0.2
0
0
Forced Beta = 20
0.5 1
IC, Collector Current (A)
1.5
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510
4



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