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PDF AZ34063U Data sheet ( Hoja de datos )
| Número de pieza | AZ34063U | |
| Descripción | 1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER | |
| Fabricantes | BCD | |
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1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
General Description
Features
Data Sheet
AZ34063U
The AZ34063U 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 AZ34063U 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 AZ34063U 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 to 1.5A
• Output Voltage Adjustable
• Operation Frequency up to 180kHz
• Precision 2% Reference
Applications
· Battery Chargers
· ADSL Modems
· Hubs
· Negative Voltage Power Supplies
SOIC-8
DIP-8
Figure 1. Package Types of AZ34063U
Jan. 2013 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063U
Electrical Characteristics
(VCC=5.0V, TA=-40 to 85oC, unless otherwise specified.)
Parameter
Symbol
Conditions
OSCILLATOR
Frequency
fOSC
VPIN5=0V, CT=1.0nF
TA=25oC
Charge Current
ICHG
VCC=5.0V to 36V, TA=25oC
Discharge Current
IDISCHG
VCC=5.0V to 36V, TA=25oC
Discharge to Charge Current
Ratio
IDISCHG/ICHG
Pin 7 to VCC, TA=25oC
Min Typ Max Unit
30 38 45 KHz
30 38 45 μA
180 240 290 μA
5.2 6.5 7.5
Current Limit Sense Voltage VIPK(sense)
OUTPUT SWITCH (Note 3)
Saturation Voltage,
Dalington Connection
VCE(sat)
ICHG=IDISCHG, TA=25oC
ISW=1.0A, Pins 1, 8 connected,
Common Emitter
Saturation Voltage (Note 4.)
VCE(sat)
ISW=1.0A, RPIN8=82Ω to VCC,
Forced β=20, Common Emitter
DC Current Gain
Collector Off-State Current
COMPARATOR
Threshold Voltage
Threshold Voltage Line
Regulation
hFE
IC(off)
ISW=1.0A, VCE=5.0V,
TA=25oC
VCE=36V
VTH
REGLINE
TA=25oC
TA=-40 to 85oC
VCC=3.0V to 36V
250 300 350 mV
1.0 1.3 V
0.45 0.7 V
50 75
0.01 100 μA
1.225 1.250 1.275
1.21 1.250 1.29
V
1.4 5 mV
Input Bias Current
TOTAL DEVICE
Supply Current
IIB VIN=0V
VCC=5.0V to 36V, CT=1.0nF,
ICC VPIN7=VCC, VPIN5>VTH,
VPIN2=GND, other pins open
-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:
Jan. 2013 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
5
5 Page 
1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
Typical Applications (Continued)
Data Sheet
AZ34063U
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 AZ34063U
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 μΗ
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).
Jan. 2013 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AZ34063U.PDF ] | |
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