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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER General Description
The AZ34063C is a monolithic switching regulator control circuit which contains the primary functions required for DC-DC converters. This device consists of internal temperature compensated reference, voltage comparator, controlled duty cycle oscillator with active current limit circuit, driver and high current output switch. The AZ34063C is specifically designed as a general DC-DC converter to be used in Step-Down, Step-Up and Voltage-Inverting applications with a minimum number of external components.
AZ34063C
Features
* * * * * * * Operation from 3.0V to 36V Input Low Standby Current Current Limiting Output Switch Current to 0.8A Output Voltage Adjustable Operation Frequency up to 180KHz (CT=100pF) Precision 2% Reference
Applications
* * * * Battery Chargers ADSL Modems Hubs Negative Voltage Power Supplies
The AZ34063C is available in 2 packages: SOIC-8 and DIP-8.
SOIC-8
DIP-8
Figure 1. Package Types of AZ34063C
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Pin Configuration
P/M Package (DIP-8/SOIC-8)
Switch Collector Switch Emitter Timing Capacitor GND 1 2 3 4 8 7 6 5 Driver Collector IPK Sense VCC Comparator Inverting Input
AZ34063C
Top View
Figure 2. Pin Configuration of AZ34063C
Functional Block Diagram
Driver Collector
8 B A S R Q
1
Switch Collector
IPK Sense
7 Ipk IPK OSC
2
Switch Emitter
CT
VCC
6
3
Timing Capacitor
+ -
1.25V Reference Regulator
Comparator Inverting Input
5
4
GND
Figure 3. Functional Block Diagram of AZ34063C
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Pin Description
Pin Number 1 2 3 4 5 6 7 8 Pin Name Switch Collector Switch Emitter Timing Capacitor GND Comparator Inverting Input VCC IPK Sense Driver Collector Function Internal switch transistor collector Internal switch transistor emitter Timing Capacitor to control the switching frequency Ground pin for all internal circuits Inverting input pin for internal comparator Voltage supply Peak Current Sense Input by monitoring the voltage drop across an external current sense resistor to limit the peak current through the switch Voltage driver collector
AZ34063C
Ordering Information
AZ34063C
E1: Lead Free Blank: Tin Lead TR: Tape and Reel Blank: Tube
Circuit Type Package M: SOIC-8 P: DIP-8
Package
Temperature Range -40 to 85oC -40 to 85oC
Part Number Tin Lead AZ34063CM AZ34063CMTR AZ34063CP Lead Free AZ34063CM-E1 AZ34063CMTR-E1 AZ34063CP-E1
Marking ID Tin Lead 34063CM 34063CM AZ34063CP Lead Free 34063CM-E1 34063CM-E1 AZ34063CP-E1
Packing Type Tube Tape & Reel Tube
SOIC-8 DIP-8
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Absolute Maximum Ratings (Note 1)
Parameter 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 Collector Current (Note 2) Switch Current Power Dissipation (TA=25 ) Thermal Resistance Operating Junction Temperature Lead Temperature (Soldering, 10s) Storage Temperature Range ESD (Human body model) DIP-8 SOIC-8 DIP-8 SOIC-8 Symbol VCC VIR VC(switch) VE(switch) VCE(switch) VC(driver) IC(driver) ISW PD RJA TJ TLEAD TSTG Value 40 -0.3 to 40 40 40 40 40 100 0.8 1.25 780 100 160 150 260 -65 to 150 2000 Unit V V V V V V mA A W mW /W V
AZ34063C
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings 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. Note 2: Maximum package power dissipation limits must be observed.
Recommended Operating Conditions
Parameter Supply Voltage Ambient Temperature
Symbol VCC TA
Min 3 -40
Max 36 85
Unit V
o
C
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Electrical Characteristics
(VCC=5.0 V, TA=-40 to 85oC, unless otherwise specified.)
AZ34063C
Parameter OSCILLATOR Frequency Charge Current Discharge Current Discharge to Charge Current Ratio Current Limit Sense Voltage OUTPUT SWITCH (Note 3) Saturation Voltage, Dalington Connection Saturation Voltage (Note 4) DC Current Gain Collector Off-State Current COMPARATOR Threshold Voltage Threshold Voltage Line Regulation Input Bias Current TOTAL DEVICE Supply Current
Symbol
Conditions CT=1.0nF CT=330pF
Min 30 75 30 180 5.2 250
Typ 38 88 38 240 6.5 300
Max 45 100 45 290 7.5 350
Unit KHz KHz A A
fOSC ICHG IDISCHG
VPIN5=0V, TA=25oC
VCC=5.0V to 36 V, TA=25oC VCC=5.0V to 36V, TA=25oC
IDISCHG/ICHG Pin 7 to VCC, TA=25oC VIPK(sense) ICHG=IDISCHG, TA=25oC
mV
VCE(sat) VCE(sat) hFE IC(off)
ISW=0.8A, Pins 1, 8 connected, Common Emitter ISW=0.8 A, RPIN8=82 to VCC, Forced =20, Common Emitter ISW=0.8A, VCE=5.0V, TA=25oC VCE=36V TA=25oC TA=-40 to 85oC VCC=3.0V to 36V VIN=0V VCC=5.0V to 36V, CT=1.0 nF, VPIN7=VCC, VPIN5 > VTH, VPIN2=GND, other pins open 50
1.0 0.45 75 0.01
1.3 0.8
V V
100
A
VTH REGLINE IIB
1.225 1.250 1.275 1.21 1.250 1.4 -20 1.29 5 -400
V mV nA
ICC
4
mA
Note 3: Low duty cycle pulse technique are used during test to maintain junction temperature as close to ambient temperature as possible. Note 4: If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( 300mA) and high driver currents ( 30mA), it may take up to 2.0us 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. If a non-Darlington configuration is used, the following output drive condition is recommended:
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Electrical Characteristics (Continued)
Forced of output switch:
AZ34063C
IC output 10 IC driver - 7.0mA*
* The 100 resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Typical Performance Characteristics
Ton-off. Output Switch On-Off Time (s)
1000
TA=25 C
100
O
ton
10
toff
Vosc. Oscillator Voltage (V) 200mV/DIV
VCC=5.0V VPIN7=VCC VPIN5=GND
1 0.1 1 10 100
VCC=5.0V VPIN7=VCC VPIN2=GND
Pin 1,5,8=open CT=1.0nF TA=25oC Time. 10s/DIV
CT, Oscillator Timing Capacitor (nF)
Figure 4. Output Switch On-Off Time vs. Oscillator Timing Capacitor
Figure 5. Timing Capacitor Waveform
3.5
100
Frequency (KHz)
TA=25 C
10
O
ICC. Supply Current (mA)
VCC=5.0V VPIN7=VCC VPIN5=GND
3.0
2.5
2.0
1.5
CT=1.0nF VPIN7=VCC VPIN2=GND
1
1.0
0.5
0.1
1
10
100
0
5
10
15
20
25
30
35
40
CT, Oscillator Timing Capacitor (nF)
VCC. Supply Voltage (V)
Figure 6. Oscillator Frequency vs.Timing Capacitor
Figure 7. Standby Supply Current vs. Supply Voltage
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Typical Performance Characteristics (Continued) AZ34063C
1.65
1.2 1.1
1.60
1.0 0.9
Darlington Connection
Saturation Voltage (V)
Saturation Voltage (V)
1.55
0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0
1.50
Forced =20 VCC=5.0V VPIN7=VCC VPIN2,3,5=GND TA=25 C
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
O
1.45
1.40
VCC=5.0V VPIN1,7,8=VCC VPIN3,5=GND TA=25 C
O
1.35 0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
-0.1 0.0
Emitter Current (A)
Collector Current (A)
Figure 8. Emitter Follower Configuration Output Saturation Voltage vs. Emitter Current
Figure 9. Common Emitter Configuration Output Switch Saturation Voltage vs. Collector Current
300
Current Limit Sense Voltage (mV)
295 290 285 280 275 270 265 260 255 250 -60
-40
-20
0
20
40
60
O
80
100
120
140
Temperature ( C)
Figure 10. Current Limit Sense Voltage vs. Temperature
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Typical Applications
L1 220H
AZ34063C
R3 180
8
B A S R Q
1
7
Rsc 0.4 VIN 12V + C1 100F Ipk IPK OSC CT
2
D1 1N5819
6
+ 1.25V Reference Regulator
3
CT 470pF
5
4
L2 1.0H VOUT VOUT + Optional Filter C3 100 F
U1 AZ34063C
R2 2.2k
R1 47k
+
28V/175mA C2 330 F
Figure 10. Step-Up Converter (Note 5) Note 5: This is a typical step-up converter configuration. In the steady state, if the resistor divider voltage at pin 5 is greater than the voltage in the non-inverting input, which is 1.25V determined by the internal reference, the output of the comparator will go low. At the next swithching period, the output switch will not conduct and the output voltage will eventually drop below its nominal voltage until the divider voltage at pin 5 is lower than 1.25V. Then the output of the comparator will go high, the output switch will be allowed to conduct. Since VPIN5=VOUT * R2/(R1+R2)=1.25(V), the output voltage can be decided by VOUT=1.25 * (R1+R2)/R2 (V).
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Typical Applications (Continued) AZ34063C
8
B A SQ R
1
7
Rsc 0.33 Ipk IPK OSC CT
2
D1 1N5819 L1 220 H
VIN 25V + C1 100F
6
1.25V Reference Regulator
3
CT 470 pF
+ -
5
4
L2 1.0 H VOUT R1 3.6k + 5V/500mA C2 470 F Optional Filter + VOUT
U1 AZ34063C
R2 1.2k
C3 100 F
Figure 11. Step-Down converter (Note 6) Note 6: This is a typical step-down converter configuration. The working process in the steady state is similar to step-up converter, VPIN5=VOUT*R2/(R1+R2)=1.25 (V), the output voltage can be decided by VOUT=1.25* (R1+R2)/R2 (V).
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Typical Applications (Continued) AZ34063C
8
B A S R Q
1
7
Rsc 0.24 Ipk IPK OSC CT
2
L1 88
VIN 4.5-6V +
6
C1 100 F 1.25V Reference Regulator
3
CT 470pF
+ -
D1 1N5819
5
4
U1 AZ34063C
L2 1.0 H VOUT C3 100 F
VOUT R1 953 + R2 8.2k -12V/100mA Optional Filter + C2 1000 F
Figure 12. Voltage Inverting Converter (Note 7)
Note 7: This is a typical inverting converter configuration. The working process in the steady state is similar to step-up converter, the difference in this situation is that the voltage at the non-inverting pin of the comparator is equal to 1.25V+VOUT, then VPIN5=VOUT*R2/(R1+R2)=1.25V+VOUT, so the output voltage can be decided by VOUT=-1.25*(R1+R2)/R1 (V).
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Mechanical Dimensions SOIC-8 Unit: mm(inch) AZ34063C
4.700(0.185) 5.100(0.201) 7
1.350(0.053) 1.750(0.069)
0.320(0.013)
8
7
8
0.675(0.027) 0.725(0.029)
D
5.800(0.228) 6.200(0.244)
D 20:1
1.270(0.050) TYP
0.100(0.004) 0.300(0.012) R0.150(0.006)
0.800(0.031)
0.200(0.008)
1.000(0.039) 3.800(0.150) 4.000(0.157)
0 8
0.330(0.013) 0.510(0.020)
0.190(0.007) 0.250(0.010) 0.900(0.035)
1 5
R0.150(0.006)
0.450(0.017) 0.800(0.031)
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER Mechanical Dimensions (Continued) DIP-8 Unit: mm(inch) AZ34063C
0.700(0.028) 7.620(0.300)TYP 1.524(0.060) TYP
6
6
5
3.710(0.146) 4.310(0.170) 4
3.200(0.126) 3.600(0.142)
4
3.000(0.118) 3.600(0.142)
0.510(0.020)MIN
0.254(0.010)TYP 0.360(0.014) 0.560(0.022) 2.540(0.100) TYP 0.130(0.005)MIN
0.204(0.008) 0.360(0.014) 8.200(0.323) 9.400(0.370)
R0.750(0.030) 3.000(0.118) Depth 0.100(0.004) 0.200(0.008) 9.000(0.354) 9.400(0.370)
6.200(0.244) 6.600(0.260)
Sep. 2006 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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