MC34063A
DC/DC CONVERTER CONTROL CIRCUIT
SPEC NO: DS34063A-00
!
TYPICAL
t
ON-OFF
Output Switch ON-OFF Time (µS)
1000
PERFORMANCE CHARACTERISTICS
Standby Supply Current vs. Supply Voltage
2
Output Switch ON-OFF Time vs. Oscillator
Timing Capacitor
I
CC
, Supply Current (mA)
VCC=5V
V
IPK
=VCC
PIN
5=GND
ON TIME
1.6
1.2
C
T
=1nF
V
IPK
=VCC
PIN 2=GND
100
0.8
10
OFF TIME
0.4
1
0.1
1
10
100
0
0
5
10
15
20
25
30
C
T
, Oscillator Timing Capacitor (nF)
VCC, Supply Voltage (V)
V
FB
, Threshold Voltage vs Temperature
1.3
IPK Threshold Voltage vs Temperature
350
V
IPK
, Threshold Voltage (mV)
V
FB
, Threshold Voltage (V)
1.28
VCC = 5V,
C
T
= 1nF
PIN 2 = GND
340
330
320
310
300
290
280
270
260
VCC = 5V
C
T
= 1nF
PIN 5 = GND
1.26
1.24
1.22
1.2
250
0
10
20
30
Temperature (
°
C)
40
50
60
70
80
0
10
20
30
40
50
60
70
80
Temperature (
°
C)
Emmiter-Follower Configuration Output Switch
Saturation Voltage vs Emmiter Current
1.8
Common-Emitter Configuration Output Switch
Saturation Voltage vs Collector Current
1.4
V
CE(SATE)
Saturation Voltage (V)
1.7
V
CE(SAT)
, Saturation Voltage (V)
VCC = 5V
PIN 1, 7, 8 = VCC
PIN 3, 5 = GND
1.2
1.0
0.8
0.6
0.4
VCC
= 5.0V
VCC
= 5V
PIN
7 =VCC
PIN
7 = VCC
PINS 2, 3, 5 = GND
PIN 2, 3, 5 = GND
Forced Beta = 20
Darlington Connection
1.6
1.5
1.4
Forced Beta = 20
0.2
0
1.3
1.2
0
0.5
1
1.5
0
0.5
1
1.5
I
E
, Emitter Current (A)
I
C
, Collector Current (A)
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
4
AIC [ ANALOG INTERGRATIONS CORPORATION ]
