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PDF AZ432 Fiche technique - Diodes

Numéro de référence AZ432
Description LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
Fabricant Diodes 
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AZ432 Datasheet, Description
Description
A Product Line of
Diodes Incorporated
AZ432
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
Features
The AZ432 series ICs are low voltage three-terminal adjustable
regulators with guaranteed thermal stability over a full operation
range. These ICs feature sharp turn-on characteristics, low
temperature coefficient and low output impedance, which make them
ideal substitutes for Zener diodes in applications such as switching
power supply, charger, motherboard and other adjustable regulators.
The output voltage can be set to any value between 1.25V and 18V
with two external resistors.
The AZ432 precision reference is offered in two voltage tolerance:
0.5% and 1.0%.
Wide Programmable Precise Output Voltage from 1.25V to 18V
High Stability under Capacitive Load
Low Temperature Deviation: 3mV Typical
Low Equivalent Full-Range Temperature Coefficient: 20PPM/oC
Typical
Low Dynamic Output Resistance: 0.05Ω Typical
High Sink Current Capacity from 0.1mA to 100mA
Low Output Noise
Wide Operating Range of -40 to +125oC
These ICs are available in 4 packages: TO-92 (bulk or ammo
packing), SOT-23, SOT-23-5 and SOT-89.
Applications
Graphic Card
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
Pin Assignments
(Top View)
3 CATHODE
2 ANODE
1 REF
(Top View)
3 CATHODE
2 ANODE
1 REF
(TO-92 (Bulk Packing)/ Z Package)
(TO-92 (Ammo Packing)/ Z Package)
(Top View)
ANODE
3
1
REF
2
CATHODE
(SOT-23/ N Package)
AZ432
Document number: DS36803 Rev. 3 - 2
1 of 18
www.diodes.com
January 2014
© Diodes Incorporated
AZ432 Fiche technique
Typical Applications Circuit (Cont.)
VIN
R1
A Product Line of
Diodes Incorporated
AZ432
R2
IOUT
IOUT = VREF/R2+ IKA
AZ432
Current Source or Current Limit
VIN
R1
8.2K
AZ1117
AZ432
2.5V/1A
R2
250
R3
250
C1
R1
COMP
PWM Controller
VFB
Precision 2.5V/1A Regulator
R2 680
R3
R5
R4
U2
3
C2
2
4
PS521
Q1
AZ432
PWM Converter with Reference
AZ432
Document number: DS36803 Rev. 3 - 2
3 of 18
www.diodes.com
VOUT
January 2014
© Diodes Incorporated

3 Page

AZ432 pdf
Electrical Characteristics (Cont.)
A Product Line of
Diodes Incorporated
AZ432
Test Circuit 4 for VKA = VREF
Test Circuit 5 for VKA > VREF
AZ432
Document number: DS36803 Rev. 3 - 2
Test Circuit 6 for IOFF
6 of 18
www.diodes.com
January 2014
© Diodes Incorporated

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Un datasheet est un document fourni par le constructeur du composant, où figurent toutes les données techniques sur le produit: puissance dissipée, courant maximal, tension de seuil, tension de claquage, température de stockage, etc.


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