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PDF AZ34063D Data sheet ( Hoja de datos )
| Número de pieza | AZ34063D | |
| Descripción | 1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER | |
| Fabricantes | BCD | |
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1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
General Description
Features
Data Sheet
AZ34063D
The AZ34063D 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 AZ34063D 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.
The AZ34063D is available in 2 packages: SOIC-8 and
DIP-8.
• 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
Applications
· Battery Chargers
· ADSL Modems
· Hubs
· Negative Voltage Power Supplies
SOIC-8
DIP-8
Figure 1. Package Types of AZ34063D
Mar. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063D
Electrical Characteristics
(VCC=5.0V, TA=-40 to 85oC, unless otherwise specified.)
Parameter
OSCILLATOR
Frequency
Charge Current
Discharge Current
Discharge to Charge
Current Ratio
Symbol
Conditions
fOSC
ICHG
IDISCHG
VPIN5=0V,
TA=25oC
CT=1.0nF
CT=330pF
VCC=5.0V to 36 V, TA=25oC
VCC=5.0V to 36V, TA=25oC
IDISCHG/ICHG Pin 7 to VCC, TA=25oC
Min Typ Max Unit
30 38 45 KHz
75 88 100 KHz
30 38 45 µA
180 240 290 µA
5.2 6.5 7.5
Current Limit Sense
Voltage
VIPK(sense) ICHG=IDISCHG, TA=25oC
OUTPUT SWITCH (Note 3)
Saturation Voltage,
Dalington Connection
VCE(sat)
Saturation Voltage (Note 4)
VCE(sat)
DC Current Gain
hFE
ISW=1A, Pins 1, 8 connected,
Common Emitter
ISW=1A, RPIN8=82 Ω to VCC,
Forced β=20, Common Emitter
ISW=1A, VCE=5.0V, TA=25oC
Collector Off-State Current
COMPARATOR
Threshold Voltage
Threshold Voltage Line
Regulation
IC(off) VCE=36V
VTH
REGLINE
TA=25oC
TA=-40 to 85oC
VCC=3.0V to 36V
Input Bias Current
TOTAL DEVICE
Supply Current
IIB VIN=0V
VCC=5.0V to 36V, CT=1.0 nF,
ICC VPIN7=VCC, VPIN5 > VTH,
VPIN2=GND, other pins open
250 300 350 mV
1.0 V
0.45 V
50 75
0.01 100 µA
1.225 1.250 1.275
1.21 1.250 1.29
V
1.4 5 mV
-20 -400 nA
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 2.0µs 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 rec-
ommended:
Mar. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
5
5 Page 
1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
Typical Applications (Continued)
Data Sheet
AZ34063D
8
VIN
4.5-6V
7
Rsc
0.24
6
+
C1
100 µF
5
B SQ
A
R
IIpPkK
OSC
CT
+
1.25V
Reference
Regulator
-
U1 AZ34063D
R1 953
R2
8.2k
1
2
L1
88 µΗ
3
CT
470pF
D1
1N5819
4
VOUT
-12V/100mA
C2
1000 µF
L2 1.0 µH
Optional
Filter
VOUT
C3
100 µF
Figure 16. 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).
Mar. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AZ34063D.PDF ] | |
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