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PDF AX3007B Data sheet ( Hoja de datos )
| Número de pieza | AX3007B | |
| Descripción | 2A PWM Buck DC/DC Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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AX3007B
52KHz, 2A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3007B 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 AX3007B series operates at a switching frequency of 52KHz 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, TO252-5L and TO263-5L packages.
FEATURES
- Output voltage: 3.3V, 5V, 12V and adjustable output version.
- Adjustable version output voltage range, 1.23V to 38.5V.
- 52KHz 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, TO263-5L Pb-Free packages.
- Low power standby mode.
- Built-in switching transistor on chip.
1/14
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Jul.28, 2010
1 page  
AX3007B
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, TA=25°C, VCC=12V for 3.3V, 5V, adjustable version and
VCC=18V for the 12V version. ILOAD = 0.2A)
Characteristics
Quiescent Current
Feedback bias current
Shutdown supply Current
Symbol
Conditions
IQ
VFB=1.5V for Adjustable
version force driver off
IFB
VFB=1.3V
(Adjustable version only)
ISD
EN pin=5V
VCC=40V
Min Typ Max Units
- 4 8 mA
- -10 -50 nA
- 100 200 uA
Oscillator frequency
FOSC
40 52 65 KHz
Oscillator frequency of short
circuit protect
FSCP
(Adjustable) When VFB<0.5V
(Fixed)When < VOUT*40%
- 15 - KHz
- 15 - KHz
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
Current limit
VFB=0V force driver on
- 100 -
DC
VFB=1.5V for Adjustable
version force driver off
-
0
-
ICL
Pear current, No outside circuit
V FB=0V force driver on
2.2
-
-
%
A
Load Regulation( △VOUT/VOUT ) △VOUT IOUT = 0.2 to 2A
Saturation voltage
VSA T
IOUT=2A, No outside circuit
VFB=0V force driver on
No outside circuit
SW pin leakage SW Pin=0V
current
VFB=1.5V for Adjustable
ISW L version force driver off
SW pin=-0.8V
VCC=40V force driver off
- 0.6 1.2 %
- 1.2 1.4 V
- - -200 uA
- -5 - mA
EN pin logic input threshold VIL Low (regulator ON)
voltage
VIH High (regulator OFF)
- 0.6
1.3 V
2.0 -
EN pin logic input current
IH VEN=2.5V (OFF)
- -0.1 -10 uA
EN pin input current
IL VEN=0.5V (ON)
- -0.01 -1 uA
Thermal shutdown Temp
TSD
- 150 - °C
5/14
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Jul.28, 2010
5 Page 
PACKAGE OUTLINES
(1) SOP-8L
AX3007B
b
D
7 (4X)
L
DETAIL A
θ
e
y
Symbol
A
A1
A2
C
D
E
H
L
b
e
y
θ
Dimensions in Millimeters
Min. Nom.
Max.
- - 1.75
0.1 - 0.25
1.25 -
-
0.1 0.2 0.25
4.7 4.9
5.1
3.7 3.9
4.1
5.8 6
6.2
0.4 - 1.27
0.31 0.41
0.51
1.27 BSC
- - 0.1
0O -
8O
Mold flash shall not exceed 0.25mm per side
JEDEC outline: MS-012 AA
DETAIL A
Dimensions in Inches
Min. Nom. Max.
- - 0.069
0.04 - 0.1
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
0O - 8O
11/14
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 Jul.28, 2010
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AX3007B.PDF ] | |
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