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PDF AX3005 Data sheet ( Hoja de datos )
| Número de pieza | AX3005 | |
| Descripción | 3A PWM Buck DC/DC Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX3005 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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AX3005
150KHz, 3A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3005 series are monolithic IC designed for a step-down DC/DC converter, and
own the ability of driving a 3A load without additional transistor. It saves board space. The
external shutdown function can be controlled by logic level and then come into standby
mode. The internal compensation makes feedback control having good line and load
regulation without external design. Regarding protected function, thermal shutdown is to
prevent over temperature operating from damage, and current limit is against over current
operating of the output switch. If current limit function occurs and VFB is down below 0.5V,
the switching frequency will be reduced. The AX3005 series operates at a switching
frequency of 150KHz thus allow smaller sized filter components than what would be
needed with lower frequency switching regulators. The output version included fixed 3.3V,
5V, 12V, and an adjustable type. The chips are available in a 5-Lead TO263 and 5-Lead
TO220 packages.
FEATURES
- Output voltage: 3.3V, 5V, 12V and adjustable output version.
- Adjustable version output voltage range, 1.23V to 38.5V.
- 150KHz fixed switching frequency.
- Voltage mode non-synchronous PWM control.
- Thermal-shutdown and current-limit protection.
- ON/OFF shutdown control input.
- Short Circuit Protect (SCP).
- Operating voltage can be up to 40V.
- Output load current: 3A.
- 5-Lead TO263 and TO220 Pb-Free packages.
- Low power standby mode.
- Built-in switching transistor on chip.
1/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.6 Mar.22, 2012
1 page  
AX3005
ELECTRICAL CHARACTERISTICS (CONTINUED)
Version
Characteristics Symbol Conditions Min Typ Max Units
AX3005-ADJ Output Feedback voltage
ILOAD =0.2A
VFB VOUT programmed
for 3.3V
1.193 1.23 1.267 V
Efficiency
η VCC = 12V, ILOAD=3A
74
%
AX3005-3.3V
Output voltage
Efficiency
VOUT ILOAD =0.2A
3.20 3.30 3.40 V
η VCC = 12V, ILOAD=3A - 75 - %
AX3005-5.0V
Output voltage
Efficiency
VOUT ILOAD =0.2A
4.85 5.00 5.15 V
η VCC = 12V, ILOAD=3A - 80 - %
AX3005-12V
Output voltage
Efficiency
VOUT ILOAD =0.2A
11.64 12.0 12.36 V
η VCC = 15V,ILOAD = 3A - 89 - %
APPLICATION CIRCUIT
(1) VIN=12V
VIN=12V
C1
470uF
C2
0.1uF
U1
1 Vcc
2 SW
4 FB
Vss
5 EN
3
ON/OFF
L1
12
33uH
D1
B340A
Vout=5.0V/3A
R1
4.7K
C3
470uF
C6
0.1uF
R2
1.5K
(2) VIN=24V
VIN=24V
C1
470uF
C2
0.1uF
U1
1 Vcc
2 SW
4 FB
Vss
5 EN
3
L1
12
47uH
D1
B340A
Vout=5.0V/3A
R1
4.7K
C3 C6
470uF 0.1uF R2
1.5K
VOUT = VFB
(1
+
R1
R2
),
VFB
=
1.23V,
R2
=
0.7K
~
3K
VOUT
R2
R1
5.0V 1.5K 4.7K
3.3V 1.5K 2.5K
2.5V 1.5K 1.5K
5/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.6 Mar.22, 2012
5 Page 
AX3005
(3) TO220-5LR
Q
E
A
F
H1
D
d1 H2
H3
d2
be
J2
J1
A
E
Symbol
A
b
D
d1
d2
E
e
F
H1
H2
H3
J1
J2
Q
Dimensions in Millimeters
Min. Nom. Max.
4.4 4.6 4.7
0.7 0.8 0.9
8.4 8.7 8.9
1.0
6.3
9.91
10.16
10.41
1.6 1.7 1.8
1.2 1.25 1.3
6.4
20.8 21.6 22.4
23.9 24.7 25.5
3.7 4.5 5.3
8.4
2.5 2.8 3.0
J1
J2
Dimensions in Inches
Min. Nom. Max.
0.175
0.180
0.185
0.027
0.032
0.037
0.330
0.340
0.350
0.039
0.248
0.390
0.400
0.410
0.062
0.067
0.072
0.048
0.050
0.052
0.250
0.820
0.850
0.880
0.942
0.972
1.002
0.147
0.177
0.207
0.331
0.100
0.110
0.120
11/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.6 Mar.22, 2012
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AX3005.PDF ] | |
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