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PDF AX3010 Data sheet ( Hoja de datos )
| Número de pieza | AX3010 | |
| Descripción | 2A PWM Buck DC/DC Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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AX3010
50KHz, 2A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3010 series are monolithic IC designed for a step-down DC/DC converter, and
own the ability of driving a 2A 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; current limit is against over current
operating of the output switch that set by outside resistance. If current limit function occurs
and VFB is down below 0.3V, the switching frequency will be reduced to 10 KHz; and over
voltage protection (OVP) that can avoid high VOUT voltage to damage circuit and capacitor.
The EN/SS pin supply soft-start function that prevents overshoot and inrush current at
startup, the soft-start time is be set up by outside capacitance. The chip is available in
SOP-8L-EP package which features small size as SOP-8L with an Exposed Pad to reduce
the junction-to-case resistance.
FEATURES
- Maximum adjustable output voltage up to 38V.
- Typical switching frequency is 50K Hz
- Voltage mode non-synchronous PWM converter.
- Thermal-shutdown and current-limit protection.
- ON/OFF shutdown and soft-start control input.
- Short Circuit Protect (SCP).
- External current limit setting.
- Over Voltage Protect (OVP).
- Operating voltage can be up to 40V.
- Output load current: 2A.
- SOP-8L-EP Pb-Free package.
- Built-in switching transistor on chip.
1/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.4 Apr. 19, 2011
1 page  
AX3010
APPLICATION CIRCUIT
VIN=12~40V
C1 C2
220uF 0.1uF
ROCSET
C6
1nF
U1
8
Vcc
SW 1
7 OCSET
3.9K 6 EN/SS
Vss 5
3
FB
4 Comp SENSE 2
AX3010
R5
4.7K
C5
47nF
12
VOUT=5.0V/2A
L1
100uH
R1
5K
C9 R6
1nF 5K
D1
B340A
C3
470uF
C4
0.1uF
R2
R8
1.5K 5K
R7
1.5K
VOUT = VFB
(1
+
R1
R2
),
VFB
=
1.155V,
R2
=
0.7K
~
1.8K
FUNCTION DESCRIPTION
VCC
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 (+VCC – VSAT) and
approximately – 0.5V, with a duty cycle of approximately VOUT / VCC. To minimize coupling
to sensitive circuitry, the PC board copper area connected to this pin should be minimized.
FB
Sense the regulated output voltage to complete the feedback loop.
5/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.4 Apr. 19, 2011
5 Page 
PACKAGE OUTLINES
X
AX3010
Expose Pad
b
D
7 (4X)
L
DETAIL A
θ
e
y
Symbol
Dimensions in Millimeters
Min. Nom. Max.
A - - 1.75
A1 0
- 0.15
A2 1.25
-
-
C 0.1 0.2 0.25
D 4.7 4.9 5.1
E 3.7 3.9 4.1
H 5.8 6 6.2
L 0.4 - 1.27
b 0.31 0.41 0.51
e 1.27 BSC
y - - 0.1
X - 2.34 -
Y - 2.34 -
θ 0O - 8O
Mold flash shall not exceed 0.25mm per side
JEDEC outline: MS-012 BA
DETAIL A
Dimensions in Inches
Min. Nom. Max.
- - 0.069
0 - 0.06
0.049
-
-
0.0075
0.008
0.01
0.185
0.193
0.2
0.146
0.154
0.161
0.228
0.236
0.244
0.015
-
0.05
0.012
0.016
0.02
0.050 BSC
- - 0.004
- 0.092 -
- 0.092 -
0O - 8O
11/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.4 Apr. 19, 2011
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AX3010.PDF ] | |
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