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PDF AX3016 Data sheet ( Hoja de datos )
| Número de pieza | AX3016 | |
| Descripción | 1.2A PWM Buck DC/DC Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX3016 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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AX3016
1.2A PWM Buck DC/DC Converter
GENERAL DESCRIPTION
The AX3016/A series are monolithic IC designed for a step-down DC/DC converter,
and own the ability of driving a 1.2A 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 outside compensation makes feedback control having good line and load
regulation. 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. Current limit depends on RSENSE value. The over voltage
protection (OVP) that can avoid high VOUT voltage to damage circuit and capacitor, the
OVP voltage is set by outside resistances. The chip is available in SOP-8L-EP package
which features small size as exposed pad to reduce the junction-to-case resistance.
FEATURES
- Operating voltage can be up to 40V
- Adjustable version output voltage range form 3.3V to 30V.
- Output load current: 1.2A
- External OVP setting function
- Operating Frequency: 50KHz
- Current mode non-synchronous PWM converter
- Thermal-shutdown and current-limit protection.
- Shutdown and soft-start function.
- Short Circuit Protect (SCP)
- External current limit setting
- Under voltage Lockout
- SOP-8L-EP Pb-Free package
- Line-compensation
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Dec.02, 2010
1 page  
AX3016
OVP
The Over Voltage sense pin, If VOVP >1.23V, the OVP is happened that it can turn-off
the driver. You can set VOUT OVP voltage by outside resistances (R3 and R4), Please see
below formula to set.
VOUT(OVP )
= 1.23 × (1+
R3
R4
)
EN/CT
The pin is enable/shutdown and auto restart control functions. When system is
normal operating, this pin is enable/shutdown function. Pulling this pin below a threshold
voltage of under 0.4V shuts the regulator off, and pulling this pin from 0.5V to 1.5V turns
the regulator on. However when VOUT is short (VFB<0.4V), the auto restart function can be
started that restart the regulator cycle by cycle. The cycle time is set by outside capacitor
(C6). Please refer the below waveform and formula, the t2 cycle is regulator off time and t1
cycle is current limit time. The charge-current is 30uA and discharge-current is 1.3uA.
Iin (A)
Current Limit
VEN/CT
1.5V
Time
0.5V
0
t1
t2
Under Voltage Lockout (UVLO)
Time
t1
=
C6
×
1
30u
(Sec.)
t2
=
C6
×
1
1.3u
(Sec.)
To avoid mis-operation of the device at low input voltages an under voltage lockout is
included that disables the device, if the input voltage falls below 6.0 V.
5/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Dec.02, 2010
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AX3016.PDF ] | |
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