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PDF APW7323 Data sheet ( Hoja de datos )
| Número de pieza | APW7323 | |
| Descripción | 1MHz Synchronous Buck Converter | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de APW7323 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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APW7323/A
3.2A, 5V, 1MHz Synchronous Buck Converter
Features
General Description
• High Efficiency up to 94%
APW7323/A is a synchronous buck converters with inte-
• Adjustable Output Voltage from 0.8V to VPVDD
• Operating from 2.9 to 6V Supply
grated 85mΩ high side and 75mΩ low side power
MOSFETs. The APW7323/A with a current-mode control
• Integrated 85mΩ High Side / 75mΩ Low Side scheme can convert wide input voltage of 2.9V to 6V to
MOSFETs
the output voltage adjustable from 0.8V to 6V to provide
excellent output voltage regulation.
• Low Dropout Operation: 100% Duty Cycle
The APW7323/A is equipped with an automatic Skip/PWM
• Stable with Low ESR Ceramic Capacitors
mode operation. At light load , the IC operates in the Skip
• Current up to 3.2A
mode to reduce the switching losses. At heavy load, the
• Power-On-Reset Detection on VCC and VIN
IC works in PWM mode.
• Model Selection :
The APW7323/A is also equipped with Power-on-reset,
APW7323 : Automatic PFM/PWM
soft start, soft-stop, and whole protections (under-voltage,
APW7323A : Forced PWM
over-voltage, over-temperature and current-limit) into a
• Integrate Soft-Start and Soft-Stop
• Over-Temperature Protection
• Over-Voltage Protection
• Under-Voltage Protection
single package.
This device, available in SOP-8P and TDFN3x3-10
packages, provides a very compact system solution ex-
ternal components and PCB area.
• High/ Low Side Current Limit
• Power Good Indication
• Enable/Shutdown Function
Simplified Application Circuit
• Available in SOP-8P and TDFN3x3-10 Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Notebook Computer & UMPC
• LCD Monitor/TV
• Set-Top Box
• DSL, Switch HUBr
• Portable Instrument
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.5 - Aug., 2013
1
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/
1 page  
APW7323/A
Pin Description
Pin
NO.
Name
SOP-8P TDFN3x3-10
Function
Signal Input. VCC supplies the control circuitry, gate drivers. Connecting a ceramic bypass
1 7 VCC capacitor from VCC to GND to eliminate switching noise and voltage ripple on the input to
the IC.
Power Good Output. This pin is open-drain logic output that is
2 8 POK pulled to ground when the output voltage is not within 12.5% of regulation point. The POK
pin, if used, needs an external pull high resistor in the range of 30kΩ~100kΩ.
3 9 GND Ground. Power and signal ground.
Output Feedback Input. The APW7323/A senses the feedback voltage via FB and
4 10 FB regulates the voltage at 0.8V. Connecting FB with a resistor-divider from the converter’s
output sets the output voltage.
Enable Input. EN is a digital input that turns the regulator on or off. Driving the EN high
5 1 EN turns on the regulator, otherwise, driving it low turns it off. The EN pin is internally pulled
high via a 300k resistor.
6 2,3 PGND Power Ground.
7 4,5 LX Power Switching Output. LX is the Junction of the high-side and low-side Power MOSFETs
to supply power to the output LC filter.
8 6 VIN Power Input. VIN supplies the step-down converter switches.
9
11
Exposed Exposed pad. Connect the exposed pad to the system ground plan with large copper area
Pad for dissipating heat into the ambient air.
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Aug., 2013
5
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/
5 Page 
APW7323/A
Typical Application Circuit
VIN
5V
CIN
22µF
On
Off
100kΩ
R4
2.2Ω
C2
1µF
VIN LX
VCC
FB
APW7323/A
R5
C3
POK
EN
Exposed
GND PGND pad
L1
2.2 µH
C1
22pF
VOUT
1.8V/3.2A
R1
25kΩ
COUT
22µ Fx2
R2
20kΩ
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Aug., 2013
11
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet APW7323.PDF ] | |
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