1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER ... Data Sheet General Description

Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
General Description
Features
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.
•
•
•
•
•
•
Operation from 3.0V to 36V Input
Low Standby Current
Current Limiting
Output Switch Current to1A
Output Voltage Adjustable
Operation Frequency up to 180kHz (CT=100pF)
•
Precision 2% Reference
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.
Applications
·
·
·
·
The AZ34063C is available in 2 packages: SOIC-8 and
DIP-8.
SOIC-8
Battery Chargers
ADSL Modems
Hubs
Negative Voltage Power Supplies
DIP-8
Figure 1. Package Types of AZ34063C
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Pin Configuration
P Package
(DIP-8)
M Package
(SOIC-8)
Switch
Collector
Switch
Emitter
Timing
Capacitor
1
8
Driver
Collector
2
7
IPK Sense
3
6
VCC
GND
4
5
Comparator
Inverting Input
Switch
Collector
1
8
Driver
Collector
Switch
Emitter
2
7
IPK Sense
Timing
Capacitor
3
6
VCC
GND
4
5
Comparator
Inverting Input
Figure 2. Pin Configuration of AZ34063C (Top View)
Functional Block Diagram
Driver
Collector
1
8
B
S
A
Switch
Collector
Q
R
IPK Sense
7
2
Ipk
IPK
CT
OSC
VCC
6
3
Timing
Capacitor
4
GND
1.25V
Reference
Regulator
+
-
Comparator
Inverting
Input
Switch
Emitter
5
Figure 3. Functional Block Diagram of AZ34063C
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Pin Description
Pin Number
Pin Name
Function
1
Switch Collector
2
Switch Emitter
Internal switch transistor collector
3
Timing Capacitor
4
GND
5
Comparator Inverting Input
6
VCC
7
IPK Sense
8
Driver 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
Ordering Information
AZ34063C
-
Circuit Type
E1: Lead Free
G1: Green
Package
TR: Tape and Reel
Blank: Tube
M: SOIC-8
P: DIP-8
Package
Temperature
Range
SOIC-8
-40 to 85oC
DIP-8
-40 to
85oC
Part Number
Lead Free
Marking ID
Green
Lead Free
Green
Packing Type
AZ34063CM-E1
AZ34063CM-G1
34063CM-E1
34063CM-G1
Tube
AZ34063CMTR-E1
AZ34063CMTR-G1
34063CM-E1
34063CM-G1
Tape & Reel
AZ34063CP-E1
AZ34063CP-G1
AZ34063CP-E1
AZ34063CP-G1
Tube
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Power Supply Voltage
VCC
40
V
Comparator Input Voltage Range
VIR
-0.3 to 40
V
Switch Collector Voltage
VC(switch)
40
V
Switch Emitter Voltage (VPIN 1=40V)
VE(switch)
40
V
Switch Collector to Emitter Voltage
VCE(switch)
40
V
Driver Collector Voltage
VC(driver)
40
V
Driver Collector Current (Note 2)
IC(driver)
100
mA
ISW
1
A
1.25
W
780
mW
Switch Current
Power Dissipation (TA=25 ℃ )
Thermal Resistance
DIP-8
PD
SOIC-8
DIP-8
100
RθJA
SOIC-8
Operating Junction Temperature
Lead Temperature (Soldering, 10s)
Storage Temperature Range
160
℃ /W
TJ
150
℃
TLEAD
260
℃
TSTG
-65 to 150
℃
2000
V
ESD (Human body model)
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
Min
Max
Unit
VCC
3
36
V
TA
-40
85
o
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Electrical Characteristics
(VCC=5.0 V, TA=-40 to 85oC, unless otherwise specified.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
OSCILLATOR
fOSC
Frequency
Charge Current
Discharge Current
Discharge to Charge
Current Ratio
VPIN5=0V,
CT=1.0nF
30
38
45
KHz
TA=25oC
CT=330pF
75
88
100
KHz
ICHG
VCC=5.0V to 36 V, TA=25oC
30
38
45
μA
IDISCHG
VCC=5.0V to 36V, TA=25oC
180
240
290
μA
5.2
6.5
7.5
250
300
350
mV
IDISCHG/ICHG Pin 7 to VCC, TA=25oC
Current Limit Sense
Voltage
VIPK(sense)
ICHG=IDISCHG, TA=25oC
OUTPUT SWITCH (Note 3)
Saturation Voltage,
Dalington Connection
VCE(sat)
ISW=1A, Pins 1, 8 connected,
Common Emitter
1.0
1.3
V
Saturation Voltage (Note 4)
VCE(sat)
ISW=1A, RPIN8=82 Ω to VCC,
Forced β=20, Common Emitter
0.45
0.8
V
hFE
ISW=1A, VCE=5.0V, TA=25oC
100
μA
DC Current Gain
Collector Off-State Current
50
75
IC(off)
VCE=36V
0.01
VTH
TA=25oC
1.225 1.250 1.275
TA=-40 to 85oC
1.21
COMPARATOR
Threshold Voltage
Threshold Voltage Line
Regulation
Input Bias Current
V
1.250
1.29
VCC=3.0V to 36V
1.4
5
mV
IIB
VIN=0V
-20
-400
nA
ICC
VCC=5.0V to 36V, CT=1.0 nF,
VPIN7=VCC, VPIN5 > VTH,
VPIN2=GND, other pins open
4
mA
REGLINE
TOTAL DEVICE
Supply Current
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:
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Electrical Characteristics (Continued)
Forced β of output switch:
IC output
≥ 10
IC driver - 7.0mA*
* The 100Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
1000
VCC=5.0V
VPIN7=VCC
VPIN5=GND
Vosc. Oscillator Voltage (V)
200mV/DIV
Ton-off. Output Switch On-Off Time (μs)
Typical Performance Characteristics
O
TA=25 C
100
ton
toff
10
VCC=5.0V
VPIN7=VCC
VPIN2=GND
1
0.1
1
10
100
Pin 1,5,8=open
CT=1.0nF
TA=25oC
CT, Oscillator Timing Capacitor (nF)
Time. 10μs/DIV
Figure 4. Output Switch On-Off Time vs.
Figure 5. Timing Capacitor Waveform
Oscillator Timing Capacitor
3.5
VCC=5.0V
VPIN7=VCC
VPIN5=GND
3.0
ICC. Supply Current (mA)
100
Frequency (KHz)
O
TA=25 C
10
2.5
2.0
CT=1.0nF
VPIN7=VCC
VPIN2=GND
1.5
1.0
1
0.5
0.1
1
10
100
CT, Oscillator Timing Capacitor (nF)
0
5
10
15
20
25
30
35
40
VCC. Supply Voltage (V)
Figure 7. Standby Supply Current vs. Supply Voltage
Figure 6. Oscillator Frequency vs.Timing Capacitor
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Typical Performance Characteristics (Continued)
1.2
1.70
1.1
1.65
Darlington Connection
1.0
Saturation Voltage (V)
Saturation Voltage (V)
0.9
1.60
1.55
1.50
VCC=5.0V
1.45
VPIN1,7,8=VCC
VPIN3,5=GND
1.40
1.35
0.0
O
TA=25 C
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
0.8
0.7
0.6
0.5
VCC=5.0V
0.3
VPIN7=VCC
0.2
0.1
VPIN2,3,5=GND
0.0
TA=25 C
-0.1
0.0
1.3
Forced β=20
0.4
O
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Collector Current (A)
Emitter 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
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
O
Temperature ( C)
Figure 10. Current Limit Sense Voltage vs. Temperature
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Typical Applications
L1 220μH
R3 180
1
8
B
S
A
Q
R
2
7
Ipk
IPK
Rsc
0.4
OSC
D1
1N5819
CT
6
VIN 12V
+
C1
100μF
3
CT
470pF
1.25V
Reference
Regulator
+
-
5
4
L2 1.0μH
U1 AZ34063C
VOUT
R2
2.2k
R1 47k
+
VOUT
28V/175mA
C2
330 μF
+
Optional
Filter
C3
100 μF
Figure 11. 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).
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Typical Applications (Continued)
8
1
B
S Q
A
R
7
Ipk
IPK
Rsc
0.33
VIN 25V
2
OSC
D1
1N5819
CT
+
C1
100μF
L1
220 μH
3
6
CT
470 pF
1.25V
Reference
Regulator
+
-
4
5
L2 1.0 μH
U1 AZ34063C
VOUT
VOUT
R1 3.6k
+
R2
1.2k
5V/500mA
C2
470 μF
+
Optional
Filter
C3
100 μF
Figure 12. 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).
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Typical Applications (Continued)
1
8
B
S
A
Q
R
2
7
Rsc
0.24
Ipk
IPK
OSC
L1
88 μΗ
CT
3
6
VIN
4.5-6V
+
C1
100 μF
1.25V
Reference
Regulator
+
-
CT
470pF
5
D1
1N5819
4
U1 AZ34063C
L2 1.0 μH
VOUT
VOUT
-12V/100mA
C2
1000 μF
Optional
Filter
+
R1 953
R2
8.2k
C3
100 μF
+
Figure 13. 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).
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Mechanical Dimensions
SOIC-8
4.700(0.185)
5.100(0.201)
7°
Unit: mm(inch)
0.320(0.013)
1.350(0.053)
1.750(0.069)
8°
8°
7°
0.675(0.027)
0.725(0.029)
D
5.800(0.228)
1.270(0.050)
6.200(0.244)
TYP
D
20:1
0.300(0.012)
R0.150(0.006)
0.100(0.004)
φ 0.800(0.031)
0.200(0.008)
0°
8°
1.000(0.039)
3.800(0.150)
4.000(0.157)
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)
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Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Mechanical Dimensions (Continued)
DIP-8
Unit: mm(inch)
0.700(0.028)
7.620(0.300)TYP
1.524(0.060) TYP
6°
3.200(0.126)
3.600(0.142)
3.710(0.146)
4.310(0.170) 4°
4°
0.510(0.020)MIN
3.000(0.118)
3.600(0.142)
0.204(0.008)
0.360(0.014)
8.200(0.323)
9.400(0.370)
0.254(0.010)TYP
0.360(0.014)
0.560(0.022)
5°
6°
2.540(0.100) TYP
0.130(0.005)MIN
6.200(0.244)
6.600(0.260)
R0.750(0.030)
Φ3.000(0.118)
Depth
0.100(0.004)
0.200(0.008)
9.000(0.354)
9.600(0.378)
Note: Eject hole, oriented hole and mold mark is optional.
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