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PDF AP1519 Data sheet ( Hoja de datos )
| Número de pieza | AP1519 | |
| Descripción | PWM Buck DC/DC Converter | |
| Fabricantes | Anachip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP1519 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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300KHz, 2A PWM Buck DC/DC Converter
AP1519
Features
- Adjustable version output voltage range, 0.8V to
18V+4%
- 300KHz +15% fixed switching frequency
- Voltage mode non-synchronous PWM control
- Thermal-shutdown and current-limit protection
- ON/OFF shutdown control input
- Operating voltage can be up to 22V
- Output load current: 2A
- SOP-8L Pb-Free packages
- Low power standby mode
- Built-in switching transistor on chip
Applications
- Simple High-efficiency step-down regulator
- On-card switching regulators
- Positive to negative converter
General Description
The AP1519 is 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 AP1519 series operates at a
switching frequency of 300KHz thus allows smaller
sized filter components than what would be needed
with lower frequency switching regulators. Other
features include a guaranteed +4% tolerance on
output voltage under specified input voltage and
output load conditions, and +15% on the oscillator
frequency. The chips are available in a standard
8-lead SOP-8 package.
Pin Assignments
Pin Descriptions
VIN
Output
FB
SD
(Top View)
18
27
36
45
SOP-8L
GND
GND
GND
GND
Name
VIN
Output
GND
FB
SD
Description
Operating voltage input
Switching output
Ground
Output voltage feedback control
ON/OFF Shutdown
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.0 Oct 5, 2004
1/9
1 page  
300KHz, 2A PWM Buck DC/DC Converter
Typical Application Circuit
AP1519
(1) Normal Circuit
12V
DC Input
Cin
Capacitor
R2 1K
R1 250 Ω
FB
Vin 1
3
AP1519
2 Output
4 56 78
SD GndGnd Gnd Gnd
L1
22uH
Inductor
D1
Schottky
Diode
Vout
=
VFB
×
(1
+
R1
R2
)
(2) Delay Start Circuit
12V
DC Input
Cin
Capacitor
R2 1K
R1 250 Ω
FB
3
Vin 1 AP1519
2 Output
CDELAY
0.1uF
4
56
78
SD GndGnd Gnd Gnd
RDELAY
10K
L1
22uH
Inductor
D1
Schottky
Diode
1V/2A
Output Load
Co
Capacitor
1V/2A
Output Load
Co
Capacitor
Anachip Corp.
www.anachip.com.tw
Rev.1.0 Oct 5, 2004
5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AP1519.PDF ] | |
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