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PDF AP1516 Data sheet ( Hoja de datos )
| Número de pieza | AP1516 | |
| Descripción | 3A PWM Buck DC/DC Converter | |
| Fabricantes | Anachip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP1516 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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150KHz, 3A PWM Buck DC/DC Converter + 1A Ultra Low
Drop Regulator
AP1516
Features
* Channel 1: simple switch
- Adjustable version output voltage range, 1.23V to
18V+4% & Fixed 3.3V version
- 150KHz +20% fixed switching frequency
- Voltage mode non-synchronous PWM control
- ON/OFF shutdown control input
- Operating voltage can be up to 20V
- Output load current: 3A
- Low power standby mode
* Channel 2: ultra low drop regulator
- Adjustable output voltage
- 0.6V Maximum Dropout voltage at 1.0A Load
current
- Fast transient response
- Good noise rejection
* Channel 1 & Channel 2
- SOP-16L Pb-free package
- Built-in switching transistor on chip
- Thermal-shutdown and current-limit protection of
each channel
Applications
- PC Motherboard
- LCD Monitor
- Graphic Card
- DVD-Video Player
- NIC/Switch
- Telecom Equipment
- ADSL Modem
- Printer and other Peripheral Equipment
Pin Assignments
( Top View )
GND
GND
VOUT1
FB1
SD1
VIN2
VOUT2
VOUT2
1
2
3
4
5
6
7
8
SOP-16L
16 GND
15 GND
14 VIN1
13 VB
12 VSENSE2
11 FB2
10 VOUT2
9 VOUT2
General Description
The Channel 1 is a step-down DC/DC converter,
and own the ability of driving a 3A load without
additional transistor component. Due to reducing
the number of external component, the board
space can be saved easily. The external shutdown
function can be controlled by logic level and then
come into standby mode. The internal
compensation makes feedback control have 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 occurred
and VFB is down to 0.5V below, the switching
frequency will be reduced. The switching
frequency of 150KHz thus allowing 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 +20% on the oscillator
frequency.
The channel 2 is a 1A regulator with extremely low
dropout voltage. This product is specifically
designed to provide well regulated supply for
applications requiring 2.8V or lower voltages from
3.3V power supplies where high efficiency of a
switcher can be achieved without the cost and
complexity associated with switching regulator.
Pin Descriptions
Name
VIN1
VB
VIN2
VOUT1
VOUT2
FB1
FB2
SD1
VSENSE2
GND
Description
Operating voltage input of channel 1
Channel 2 bias voltage
Main power source of channel 2
Channel 1 switching output
Channel 2 output
Output1 voltage feedback control
Output2 voltage feedback control
Channel 1 ON/OFF shutdown
Channel 2 output sense pin
Ground
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.1.1 May 23, 2005
1/10
1 page  
150KHz, 3A PWM Buck DC/DC Converter + 1A Ultra Low
Drop Regulator
Typical Application Circuit
(1) AP1516-3.3 Fix Version
AP1516
VOUT1
3.3/3A
680uF
VB VIN2
12V VCC1
330u
VIN1 14 13
6 7/8/9/10 VOUT2
VOUT2
33u
SR360
FB1 4
VOUT1 3
AP1516-3.3
5 1/2/15/16
SD1
GND
12 VSENSE2
2.5V/1A
R1 121
11 FB2
470uF
R2 121
IFB2
* R1 & R2 =100 ~200 ohm
* VOUT2=1.235(1+R2/R1)+IFB2 *R2
(2) AP1516-ADJ Version
VOUT1
2.5/3A
680uF
1K R3
1K R4
VCC1
330u
33u
SR360
VIN1 14
FB1 4
VOUT1 3
VB
13
VIN2
6 7/8/9/10
VOUT2
AP1516
12 VSENSE2
R1
5 1/2/15/16
SD1 GND
11 FB2
R2
VOUT2
1.8V/1A
220
470uF
100
* R1 = 200 ~ 300 ohm
* R4 = 1K ~ 2K
* VOUT1 = 1.235*(1+R3/R4)
Anachip Corp.
www.anachip.com.tw
Rev.1.1 May 23, 2005
5/10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AP1516.PDF ] | |
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