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AX1203 Schematic ( PDF Datasheet ) - AXElite

Teilenummer AX1203
Beschreibung 3A Ultra Low Dropout Linear Regulator
Hersteller AXElite
Logo AXElite Logo 




Gesamt 11 Seiten
AX1203 Datasheet, Funktion
AX1203
3A Ultra Low Dropout Linear Regulator
GENERAL DESCRIPTION
The AX1203 is a low-dropout voltage regulator suitable for various electronic
equipments. It provides constant voltage power source. The dropout voltage of AX1203 is
below 0.4V in full rated current (3A). This regulator has various functions such as a peak
current protection, a thermal shut down, a short circuit protect.
The AX1203 is available in TO220-5L and PDIP-8L power packages which features
small size to reduce the junction-to-case resistance, being applicable in 0.5~3W
applications.
FEATURES
- Ultra Low Dropout - 0.4V(typical) at 3A Output Current
- Adjustable mode: 1.22V Reference Voltage
- Fixed mode:5V, 9V, 12V output voltage
- Operating voltage can be up to 23V.
- Current-Limit and Thermal Shutdown Protection
- Short circuit protection, Enable function.
- Built-in internal SW P-channel MOS
- TO220-5L, TO220-5LR and PDIP-8L Pb-Free Packages.
BLOCK DIAGRAM
Vcc
EN
10uA
Current
Limit
Enable
7V
Thermal
Shutdown
Error
- + Amp
Vref=1.22V
OUT
FB
GND
1/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.7 Jun.09, 2011






AX1203 Datasheet, Funktion
3. FIXED (PDIP-8L)
ON/OFF
VIN+13V
C3
100pF
U1
1
GND
8
OUT
2 FB
OUT 7
3 EN
6
OUT
4 Vcc
AX1203-12
C1
100uF
OUT 5
AX1203
VOUT = 12V/3.0A
C2
220uF
4. ADJ (PDIP-8L)
ON/OFF
VIN+10V
U1
1
GND
8
OUT
2 FB
OUT 7
3 EN
OUT 6
4
Vcc
5
OUT
AX1203-ADJ
C1
100uF
R1
30K
R2
4.7K
VOUT = 9V/3.0A
C3
100pF
C2
220uF
VOUT=VFB*(1+R1/R2)
VFB=1.22V
R2 suggest 1K ~ 5.6KΩ
C2 Choose Low ESR Capacitor
C3=47pF ~100pF for stability issue
6/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.7 Jun.09, 2011

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