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PDF APW8825 Data sheet ( Hoja de datos )
| Número de pieza | APW8825 | |
| Descripción | 3A 5V 1MHz Synchronous Buck Converter | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de APW8825 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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APW8825
3A 5V 1MHz Synchronous Buck Converter
Features
General Description
• High Efficiency up to 95%
APW8825 is a 3A synchronous buck converter with inte-
- Automatic Skip/PWM Mode Operation
grated 110mΩ high side and 80mΩ low side power
• Adjustable Output Voltage from 0.6V to VIN
MOSFETs. The APW8825 design with a current-mode
control scheme, can convert wide input voltage of 2.6V to
• Integrated 110mΩ High side 80mΩ Low Side 5.5V to the output voltage adjustable from 0.6V to 5.5V to
MOSFET
provide excellent output voltage regulation.
• Low Dropout Operation : 100% Duty cycle
The APW8825 is equipped with an automatic Skip/PWM
• Stable with Low ESR Ceramic Capacitors
mode operation. At light load, the IC operates in the Skip
• Power-On-Reset Detection on VIN
mode to reduce the switching losses. At heavy load, the
• Integrate Soft Start and Soft-Stop
IC works in PWM mode. At PWM mode, the switching
• Over-Temperature Protection
• Over Voltage Protection
• Under Voltage Protection
• High/ Low Side Current Limit
• Power Good Indication
• Enable/Shutdown Function
• Small SOT-23-6 and TDFN2x2-8 packages
frequency is set by the external resistor.
The APW8825 is also equipped with Power-on-reset, soft
start, soft-stop, and whole protections (under-voltage,
over-voltage, over-temperature and current-limit) into a
single package.
This device, available TDFN2X2-8 and SOT-23-6 provide
a very compact system solution external components and
PCB area.
• Lead Free and Green Devices Available (RoHS
compliant)
Applications
Simplified Application Circuit
• Notebook Computer & UMPC
• LCD Minitor/TV
• Set-Top Box
• DSL, Switch HUB
• Portable Instrument
VIN
CIN
R3
ON
OFF
VIN
LX
APW8825
NC FB
POK
PGND
EN AGND
L1
C1
(option)
VOUT
R1
COUT
R2
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.3 - Feb., 2016
1
www.anpec.com.tw
1 page  
APW8825
Pin Description
PIN
TDFN2x2-8 TSOP23-6
16
2
3
4,
Exposed pad
5
6
7
8
-
5
4
-
-
3
1
-
2
Name
Function
FB
POK
VIN
PGND
NC
LX
EN
AGND
GND
Output Feedback Input. The APW8825 senses the feedback voltage via FB and regulates
the voltage at 0.6V. Connecting FB with a resistor-divider from the converter’s output sets
the output voltage.
Power Good Output. This pin is open-drain logic output that is pulled to ground when the
output voltage is not within 10% of regulation point.
The control circuitry and converter supply input. Connecting a ceramic bypass capacitor
from VIN to GND to eliminate switching noise and voltage ripple on the input to the IC.
Power ground. Connect this pin to AGND.
No internal connection.
Power Switching Output. LX is the Junction of the high-side and low-side Power
MOSFETs to supply power to the output LC filter.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on
the regulator, drive it low to turn it off.
Analog ground. Connect this pin to PGND.
Power and signal ground.
Block Diagram
VIN
Over
Temperature
Protection
125%VREF
66%VREF
Power-
On-
Reset
OTP
OVP
POR
UVP
POK
LOC
Current
Limit
Fault
Logics
Current
Sense
Amplifier
Zero Crossing
Comparator
Inhibit
Gate
Control
FB 90%VREF
ISS
Error
Amplifier
Gm
VREF
0.6V
Current
Compartor
Shutdown
Slope
Compensation
Oscillator
Gate
Driver
Gat
e
LOC
Current
Sense
Amplifier
POK
Copyright © ANPEC Electronics Corp.
Rev. A.3 - Feb., 2016
EN
5
LX
GND
www.anpec.com.tw
5 Page 
APW8825
Package Information
TDFN2x2-8
D
A
D2
Pin 1 Corner
A1
A3
NX
aaa c
SEATING PLANE
e
S TDFN2*2-8
Y
M MILLIMETERS
B
INCHES
O
L MIN.
MAX.
MIN.
MAX.
A 0.70
0.80
0.028
0.031
A1 0.00
0.05
0.000
0.002
A3 0.20 REF
b 0.18
0.30
0.008 REF
0.007
0.012
D 1.90
2.10
0.075
0.083
D2 1.00
E 1.90
1.60
2.10
0.039
0.075
0.063
0.083
E2 0.60
1.00
0.024
0.039
e 0.50 BSC
L 0.30
0.45
0.020 BSC
0.012
0.018
K 0.20
0.30
0.008
0.012
aaa 0.08
0.003
Copyright © ANPEC Electronics Corp.
Rev. A.3 - Feb., 2016
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet APW8825.PDF ] | |
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