HTC MC34063C_08

0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
FEATURES
8 SOP/ 8 DIP PIN Configulation
● Operating From 3V To 40V
● Low Standby Current
● Current Limitting
● Output Switch Current to 0.8A
● Output Valtage Adjustable
● Operation Frequency up to 180KHz (CT=100pF)
SOP-8 PKG
● Precision 2% Reference
DIP-8 PKG
● Moisture Sensitivity Level 3
Application
Switch
Collector
1
8
Driver
Collector
Switch
Emitter
2
7
Ipk Sense
Timing
Capacitor
3
6
Vcc
Ground
4
5
Comparator
Inverting
Input
● Battery Chargers
● NICs / Switches / Hubs
● ADSL Modems
● Negative Voltage Power Supplies
ORDERING INFORMATION
Device
MC34063CD
MC34063CN
Package
SOP-8
DIP-8
DESCRIPTION
The MC34063C is a monolithic switching regulator control circuit containing the primary funtions required for
DC-DC converters.
This device consists of internal temperature compenssated reference, voltage comparator, cotrolled duty cycle
duty cycle oscillator with active current. The device is specifically designed to be used in Step-Down, Step-Up
and Voltage-Inverting applications with a minimum number of external components.
The MC34063C is the enhanced version of MC34063A with the ability to work in higher frequency.
The 34063C is available in 2 pcakages : SOP-8 and DIP-8.
HTC
2008 - Ver. 1.0
−1−
0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
BLOCK DIAGRAM
Drive
Collector
8
s
Q
Q2
1
Switch
Collector
2
Switch
Emitter
3
Timing
Capacitor
4
GND
Q1
R
Ipk Sense
7
Ipk Oscillator
Vcc
6
Comparator
1.25V
Reference
Regulator
+
Comparator
lnverting
input
5
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
SYMBOL
PARAMETER
Vcc
Power Supply Voltage
Vir
Comparator input Voltage Range
VALUE
UNIT
40
V
-0.3 to 40
V
VSWC
Switch Collector Voltage
40
V
VSWE
Switch Emitter Voltage (VSWC=40V)
40
V
VCE
Switch Collector to Emitter Voltage
40
V
Vdc
Driver Collector Voltage
40
V
Idc
Driver Collector Current (NOTE 2)
100
㎃
Isw
Switch Current
0.8
A
Power Dissipation at Tamb=25℃
1.25
W
Thermal Resistance
100
℃/W
0.625
W
160
℃/W
-40 to 150
℃
-65 to +150
℃
PD
PΘJA
PD
PΘJA
TJ
Tstg
SOP Package
DIP Package
Power Dissipation at Tamb=25℃
Thermal Resistance
Operating Juntion Temperature Range
Storage Temperature Range
Absolute Maximum Rating are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
HTC
−2−
0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
ELECTRICAL CHARACTERISTICS(Refer to the test circuits, V CC=5V, Ta= -40℃ to 85℃)
OSCILLATOR
SYMBOL
PARAMETER
FOSC
Frequency
Ichg
Charge Current
Idischg
Discharge Current
Idischg/Ichg Discharge to Charge Current Ratio
Vipk(sense) Current Limit Sense Voltage
TEST CONDITIONS
MIN.
Vpin5= 0 V ,CT= 100pF ,Ta= 25 C 170
30
VCC= 5 to 40V ,T a= 25oC
o
TYP.
180
MAX. UNIT
190 KHz
38
45
㎂
180
240
290
㎂
Pin 7= V CC ,Ta= 25 C
5.2
6.5
7.5
Ichg= Idischg ,Ta= 25oC
250
300
350
MIN.
TYP.
1
o
VCC= 5 to 40V ,T a= 25 C
o
㎷
OUTPUT SWITCH (NOTE 3)
SYMBOL
VCE(sat)
VCE(sat)
PARAMETER
Saturation Voltage,
Darlington connection
Saturation Voltage (NOTE 4)
hFE
DC Current Gain
IC(off)
Collector Off-State Current
TEST CONDITIONS
ISW = 1A ,Pins 1,8 connected
0.45
ISW = 1A ,Rpin8= 82Ω to VCC,
Forced β ~ 20
ISW = 1A, VCE= 5V, T a= 25oC
VCE= 40V
50
MAX. UNIT
1.3
V
0.8
V
100
㎂
75
0.01
COMPARATOR
SYMBOL
Vth
Regline
IIB
PARAMETER
TEST CONDITIONS
Threshold Voltage
Ta= 25oC
Ta= TLOW to THIGH
Threshold Voltage Line Regulation
VCC= 3 to 40V
Input Bias Current
VIN= 0V
MIN.
1.225
1.21
TYP.
1.25
MAX. UNIT
1.275 V
1.29
V
1.4
5
㎷
-20
-400
㎁
TOTAL DEVICE
SYMBOL
ICC
PARAMETER
Supply Current
TEST CONDITIONS
VCC= 5 to 40V, CT=1㎋
MIN.
TYP.
Pin7= VCC ,Vpin5>Vth, Pin2=GND
Remaining pins open
for MC34063C
2.5
MAX. UNIT
4
㎃
Notes:
1 Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress retings only, and functional operation of the device at these or any other conditions beyond those
indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for
extended periods may affect device reliability.
2 Maximum package power dissipation limits must be observed.
3 Low duty cycle pulse technique are used during test to maintain juntion temperature as close to ambient
Temperature as possible.
(
and
4 If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents≤300mA)
high driver currents (≥30mA), it may take up to 2.0 ㎲ for it to come out of saturation. This condition will shorten
the off time at frequencies 30kHz, and is magnified at high temperatures. This condition does not occur with a
Darlington configuration, since the output switch cannot saturate.
HTC
−3−
0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
TYPICAL PERFORMANCE CHARACTERISTICS
А
A
B
TON/OFF — Output Switch ON/OFF Time (µs)
OUTPUT SWITCH ON-OFF TIME
versus OSCILLATOR TIMING CAPACITOR
TIMING CAPACITOR WAVEFORM
1000
VOSC — Oscillator Voltage (V)
200mV / DIV
tON
100
tOFF
10
VCC = 5V
Pin7= VCC
Pin5 = GND
TA = 25°C
1
1
0.1
VCC = 5V
Pin7= VCC
10
Pin2 = GND
TA = 25°C
Pins1, 5, 8 = open CT = 1nF
100
CT — Oscillator Timing Capacitor (nF)
C
Time — 10µs / DIV
D
OSCILLATOR FREQUENCY
versus TIMING CAPACITOR
STANDBY SUPPLY CURRENT
versus SUPPLY VOLTAGE
3.5
3.0
I CC — Supply Current (mA)
Frequency (kHz)
100
10
VCC = 5V
Pin7= VCC
Pin5 = GND
TA = 25°C
1
0.1
1
2.5
2.0
1.5
CT = 1nF
Pin7= VCC
Pin2 = GND
1.0
10
0.5
100
0
5
10
CT — Oscillator Timing Capacitor (nF)
E
15
20
25
30
35
40
VCC — Supply Voltage (V)
F
EMITTER FOLLOWER CONFIGURATION OUTPUT
SATURATION VOLTAGE vs. EMITTER CURRENT
COMMON EMITTER CONFIGURATION OUTPUT SWITCH
SATURATION VOLTAGE vs. COLLECTOR CURRENT
1.2
1.65
1.1
1.0
Saturation Voltage (V)
Saturation Voltage (V)
1.60
1.55
1.50
1.45
VCC = 5V
Pins 1, 7, 8 = VCC
Pins 3, 5 = GND
TA = 25°C
1.40
1.35
0
0.1
0.2
0.3
0.4
0.5
0.7
0.6
0.8
0.9
1.0
0.8
0.7
0.6
0.5
0.4
0.3
Forced ? = 20
0.2
VCC = 5V
Pins 7= VCC
Pins 2, 3, 5 = GND
TA = 25°C
0.1
0
1.1
-0.1
Emitter Current (A)
G
Darlington Connection
0.9
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Collector Current (A)
CURRENT LIMIT SENSE VOLTAGE
versus TEMPERATURE
Current Limit Sense Voltage (mV)
300
295
290
285
280
275
270
265
260
255
250
-60
-40
-20
0
20
40
60
80
100
120
140
3
Temperature (°C)
HTC
−4−
0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
TYPICAL APPLICATION CIRCUIT
Step-Up Converter
L1
120μH
R3
1
8
180Ω
DRC
SWC
Ipk
SWE
7
Rsc
2
6
Vcc
TC
CII
GND
D1
IN5819
3
0.4Ω
5
VIN
12V
+
C2
100㎌
4
C3
VOUT
1500pF
28V/175㎃
MC34063C
R1
R2
2.2KΩ
+
C1
47KΩ
330㎌
Step-Down Converter
1
8
DRC
SWC
7
Rsc
Ipk
0.4Ω
SWE
6
Vcc
TC
CII
GND
5
VIN
25V
+
C2
100㎌
IN5819
2
D1
3
L
4
C3
220μH
470㎊
MC34063C
R1
R2
1.2KΩ
3.6KΩ
+
C1
VOUT
5V/0.5A
470㎌
HTC
−5−
0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
Step-Up With External NPN Switch
8
VOUT
1
S
Q2
Q
+
Q1
R
2
7
Rsc
VIN
3
Ipk Oscillator
6
comparator
1.25V
+
4
Reference
-
Regulator
5
Voltage Inverting Converter
1
8
DRC
SWC
7
R3
L1
2
Ipk
SWE
0.4Ω
150μH
6
3
Vcc
TC
5
VIN
4.5V to 6V
+
C2
100㎌
D1
4
CII
GND
BYV10-40
C3
1.5㎋
MC34063C
R2
R1
VOUT
8.2KΩ
953Ω
C1
+
-12V /100㎃
1000㎌
HTC
−6−
0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
Step-Down With External NPN Switch
8
1
S
Q
Q2
Q1
R
2
7
Rsc
VOUT
3
Ipk Oscillator
+
6
VIN
comparator
1.25V
+
-
4
Reference
Regulator
5
Step-Down With External PNP Switch
8
1
S
Q
Q2
Q1
R
+
VOUT
2
7
Rsc
VIN
3
Ipk Oscillator
6
comparator
+
-
1.25V
4
Reference
Regulator
5
HTC
−7−
0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
Voltage Inverting With External NPN Switch
8
1
S
Q
Q2
Q1
R
2
7
Rsc
Ipk Oscillator
6
VIN
VOUT
3
+
comparator
1.25V
+
-
4
Reference
Regulator
5
Voltage Inverting With External PNP Saturated Switch
8
1
S
Q2
Q
VOUT
Q1
R
+
2
7
Ipk Oscillator
Rsc
VIN
6
3
comparator
+
-
1.25V
Reference
4
Regulator
5
HTC
−8−
0.8A Step Down / Step Up / Inverting DC-DC Converter
MC34063C
Dual Output Voltage
+
+12V
GND
8
+
1
S
Q
Q2
-12V
Q1
R
2
7
Rsc
Ipk Oscillator
comparator
6
VIN
3
1.25V
+
-
4
Reference
Regulator
5
Higher Output Power, Higher Input Voltage
+
Isolated from input
+VOUT
-VOUT
8
+
1
S
Q
R
2
7
VIN
Rsc
Ipk Oscillator
6
3
comparator
1.25V
+
-
Reference
4
Regulator
5
HTC
−9−