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PDF AX3023A Data sheet ( Hoja de datos )
| Número de pieza | AX3023A | |
| Descripción | 1A PWM Buck DC/DC Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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AX3023A
38KHz, 1A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3023A series are monolithic IC designed for a step-down DC/DC converter,
and own the ability of driving a 1A 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. The AX3023A operates at a switching frequency of 38KHz.
Other features include a guaranteed +3% tolerance on output voltage under specified input
voltage and output load conditions, The chips are available in SOT-23-5L and SOP-8L
packages.
FEATURES
- Output voltage: adjustable output version.
- Adjustable version output voltage range: 0.745V to 22V±3%.
- Fixed switching frequency is 38KHz
- Thermal-shutdown and current-limit protection.
- ON/OFF shutdown control input (SOT-23-5L Only).
- Operating voltage can be up to 24V.
- Output load current: 1A.
- SOT-23-5L and SOP-8L 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.1.5 Jun.28, 2010
1 page  
AX3023A
VOUT
=
VFB
(1
+
R1
R2
),
VFB
=
0.745V,
R2
=
0.75K
~
4K
Table 1 Resistor select for output voltage setting
VOUT
R2
R1
5V 1.2K 6.8K
3.3V 2.4K 8.2K
2.5V 2K 4.7K
1.8V 3.3K 4.7K
1.5V 2K
2K
1.3V 2K 1.5K
1.2V 2K 1.2K
VOUT
L1 Value
L1 recommend value (VIN=12V ,IOUT=1A)
1.8 V 2.5V
3.3V
100uH
120uH
150uH
FUNCTION DESCRIPTIONS
Pin Functions
VIN
5V
180uH
This is the positive input supply for the IC switching regulator. A suitable input bypass
capacitor must be presented at this pin to minimize voltage transients and to supply the
switching currents needed by the regulator.
VSS
Circuit ground.
SW
Internal switch. The voltage at this pin switches between (+VIN – VSAT) and
approximately – 0.5V, with a duty cycle of approximately VOUT / VIN. To minimize coupling to
sensitive circuitry, the PC board copper area connected to this pin should be minimized.
5/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Jun.28, 2010
5 Page 
(2) SOT-23-5L
D
e
e1
θ1(4x)
AX3023A
C
GAUGE PLANE
L
L1
DETAL A
θ
b(5x)
θ2(4x)
Symbol
Dimensions in Millimeters
Min. Nom. Max.
A-
- 1.45
A1 0.00
0.08
0.15
A2 0.90
b 0.30
C 0.08
1.10
0.40
0.15
1.30
0.50
0.22
D 2.70 2.90
3.10
E1 1.40
1.60
1.80
E 2.60 2.80 3.00
L 0.30 0.45 0.60
L1 0.50 0.60
0.70
e1 1.9 BSC
e 0.95 BSC
θ 0o
4o
8o
θ1 5o 10o 15o
θ2 5o 10o 15o
JEDEC outline: MO-178 AA
DETAL A
Dimensions in Inches
Min. Nom. Max.
- - 0.057
0 0.003 0.006
0.035
0.043
0.051
0.012
0.016
0.020
0.003
0.006
0.009
0.106
0.114
0.122
0.055
0.063
0.071
0.102
0.110
0.118
0.012
0.018
0.024
0.020
0.024
0.028
0.075 BSC
0.037 BSC
0o 4o 8o
5o 10o 15o
5o 10o 15o
11/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Jun.28, 2010
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AX3023A.PDF ] | |
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