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PDF AX3007A Data sheet ( Hoja de datos )
| Número de pieza | AX3007A | |
| Descripción | 2A PWM Buck DC/DC Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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AX3007A
85KHz, 2A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3007A 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, 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 AX3007A series operates at a switching frequency of 85KHz 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 standard SOP-8L, SOP-8L-EP and TO252-5L packages.
FEATURES
- Output voltage: 3.3V, 5V, 12V and adjustable output version.
- Adjustable version output voltage range, 1.23V to 38.5V.
- 85KHz 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: 2A.
- SOP-8L, SOP-8L with Exposed Pad and TO252-5L Pb-Free packages.
- Low power standby mode.
- Built-in switching transistor on chip.
1/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Jul.28, 2010
1 page  
AX3007A
ELECTRICAL CHARACTERISTICS (CONTINUED)
Version
Characteristics Symbol Conditions
ILOAD =0.2A
AX3007A-ADJ Output Feedback voltage
VFB VOUT programmed
for 3.3V
Efficiency
η VCC=12V, ILOAD=2A
AX3007A-3.3V
Output voltage
Efficiency
VOUT ILOAD =0.2A
η VCC=12V, ILOAD=2A
AX3007A-5.0V
Output voltage
Efficiency
VOUT ILOAD =0.2A
η VCC=12V, ILOAD=2A
AX3007A-12V
Output voltage
Efficiency
VOUT ILOAD =0.2A
η VCC=15V, ILOAD=2A
Min Typ Max Units
1.193 1.23 1.267 V
- 78 -
3.20 3.30 3.40
- 78 -
4.85 5.00 5.15
- 82 -
11.64 12.0 12.36
- 90 -
%
V
%
V
%
V
%
APPLICATION CIRCUIT
(1) Adjustable Output Voltage Version
VIN=12V
C1
470uF
C2
0.1uF
U1
1 Vcc
2 SW
3 FB
4 EN
Vss 8
Vss 7
Vss 6
Vss 5
AX3007A
L1
1
2
68uH
D1
B340A
Vout=5.0V/2A
R1
4.7K
C3 C6
470uF 0.1uF
R2
1.5K
(2) Adjustable Output Voltage Version with Delayed Startup
VIN=12V
C1
470uF
C2
0.1uF
C4
0.1uF
R3
100k
U1
1 Vcc
2 SW
3 FB
4 EN
Vss 8
Vss 7
Vss 6
Vss 5
ON/OFF AX3007A
L1
1
2
68uH
D1
B240A
Vout=2.5V/2A
R1
1.8K
C3 C6
470uF 0.1uF R2
1.8K
VOUT = VFB
(1
+
R1
R2
),
VFB
=
1.23V,
R2
=
0.47K
~
3K
5/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Jul.28, 2010
5 Page 
(2) SOP-8L-EP
X
AX3007A
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
11/12
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Jul.28, 2010
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AX3007A.PDF ] | |
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