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PDF A7320A Data sheet ( Hoja de datos )

Número de pieza A7320A
Descripción 18V (30V SPIKE) 2A SYNCHRONOUS PFM/PWM BUCK CONVERTER
Fabricantes AiT Semiconductor 
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No Preview Available ! A7320A Hoja de datos, Descripción, Manual

AiT Semiconductor Inc.
www.ait-ic.com
A7320A
DC-DC CONVERTER/ BUCK (STEP-DOWN)
18V (30V SPIKE) 2A SYNCHRONOUS PFM/PWM BUCK CONVERTER
DESCRIPTION
FEATURES
The A7320A is a high efficiency current-mode
synchronous, 18V/2A buck converter. Its input
voltage ranges from 4.5V to 18V and it provides an
adjustable regulated output voltage from 0.923V to
15V while delivering up to 2A of output current.
The internal synchronous switches increase
efficiency and eliminate the need for an external
Schottky diode. The switching frequency is set to
340KHz. And the A7320A will automatically switch
between PFM and PWM mode based on the load
current, thus to enhance the converter efficiency at
light load.
A7320A consists of many protection block such as
UVLO, input voltage over voltage protection to stand
much higher input voltage spike, thermal protection
and output short circuit protection.
The A7320A is available in SOP8 and PSOP8
packages.
Adjustable Output Voltage, VFB=0.923V
Maximum output current is 2A
Range of operation input voltage: Max 18V
Withstand input voltage spike >30V
Standby current: 1mA (typ.)
Operating current at zero load: 1.2mA (typ.)
Line regulation: 0.1%/V (typ.)
Load regulation: 10mV (typ.)
High efficiency, up to 95%
Environment Temperature: -20°C ~ 85°C
Available in SOP8 and PSOP8 Packages
APPLICATION
Set-top-box
Consumer Electronic Device for automobile
LCD Monitor and LCD TV
Portable DVD
ADSL Modem, WLAN router
Other 12V or double cell Li-ion battery powered
device
TYPICAL APPLICATION
ORDERING INFORMATION
Package Type
Part Number
SOP8
PSOP8
Note
M8 A7320AM8R
A7320AM8VR
MP8
A7320AMP8R
A7320AMP8VR
R: Tape & Reel
V: Halogen free Package
AiT provides all RoHS products
Suffix “ V “ means Halogen free Package
* When VIN is as low as 5V, CC is recommended to be 100pf, but
not needed when Vin larger than 5V.
REV1.0 - JUN 2012 RELEASED -
-1-

1 page




A7320A pdf
AiT Semiconductor Inc.
www.ait-ic.com
A7320A
DC-DC CONVERTER/ BUCK (STEP-DOWN)
18V (30V SPIKE) 2A SYNCHRONOUS PFM/PWM BUCK CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
VIN=12V, VOUT=3.3V, L=10uH, CIN=10uF, COUT=22uF, TA=25°C, unless otherwise stated
1. Efficiency (VOUT=3.3V)
2. VOUT Vs. IOUT
3. VOUT Vs. VIN
4. Zero Load Operating Current Vs. VIN
5. Switching waveform VIN=18V, IOUT=0
6. Switching waveform VIN=18V, IOUT=2A
REV1.0 - JUN 2012 RELEASED -
-5-

5 Page





A7320A arduino
AiT Semiconductor Inc.
www.ait-ic.com
Dimension in PSOP8 Package (Unit: mm)
A7320A
DC-DC CONVERTER/ BUCK (STEP-DOWN)
18V (30V SPIKE) 2A SYNCHRONOUS PFM/PWM BUCK CONVERTER
Symbol
A
A1
A2
b
c
D
D1
E
E1
E2
e
L
θ
Min Max
1.350
1.750
0.000
0.150
1.250
1.650
0.380
0.510
0.170
0.250
4.800
5.000
3.100
3.500
3.800
4.000
5.800
6.200
2.200
2.600
1.270(BSC)
0.450
0.800
0° 8°
REV1.0 - JUN 2012 RELEASED -
- 11 -

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