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A7122 Schematic ( PDF Datasheet ) - AiT Semiconductor

Teilenummer A7122
Beschreibung 2A 3MHz 6V SYNCHRONOUS BUCK CONVERTER
Hersteller AiT Semiconductor
Logo AiT Semiconductor Logo 




Gesamt 13 Seiten
A7122 Datasheet, Funktion
AiT Semiconductor Inc.
www.ait-ic.com
A7122
DC-DC CONVERTER BUCK (STEP-DOWN)
2A 3MHz 6V SYNCHRONOUS BUCK CONVERTER
DESCRIPTION
FEATURES
The A7122 is a high efficiency synchronous, buck
DC/DC converter. Its input voltage range is from 2.6V
Adjustable Output Voltage, VFB=0.6V
Maximum output current is 2A
to 6V and provides an adjustable regulated output Range of operation input voltage: Max 6V
voltage from 0.6V to VIN while delivering up to 2A of
output current.
Standby current: 30uA (typ.)
Line regulation: 0.1%/V (typ.)
The internal synchronous switches increase Load regulation: 10mV (typ.)
efficiency and eliminate the need for an external High efficiency, up to 96%
Schottky diode. It runs at a fixed 3MHz frequency, Environment Temperature: -20°C~85°C
which allows the use of small inductor with L<1uH Available in DFN8(2x2) and SOT-25 Packages
while maintaining a high efficiency and small output
voltage ripple.
APPLICATION
When Mode pin is connected to GND, the A7122 is
operating in PFM/PWM auto-switch mode which Power Management for 3G modem
enhance the efficiency at light-load.
Smart Phone
Tablet PC
The A7122 is available in DFN8(2x2) and SOT-25
Set Top Box
packages.
Other Battery Powered Device
ORDERING INFORMATION
TYPICAL APPLICATION
Package Type
Part Number
DFN8(2x2)
A7122J8R
J8
A7122J8VR
SOT-25
Note
A7122E5R
E5
A7122E5VR
R: Tape & Reel
V: Halogen free Package
AiT provides all RoHS products
Suffix “ V “ means Halogen free Package
REV1.0
- JUL 2012 RELEASED -
-1-






A7122 Datasheet, Funktion
AiT Semiconductor Inc.
www.ait-ic.com
A7122
DC-DC CONVERTER BUCK (STEP-DOWN)
2A 3MHz 6V SYNCHRONOUS BUCK CONVERTER
7. Switching waveform
VIN=5V, VOUT=3.3V, IOUT=0A
8. Switching waveform
VIN=5V, VOUT=3.3V, IOUT=0.5A
9. Load Transient
VIN=3.6V, VOUT=1.2V, IOUT=0.2A/1A
10. Load Transient
VIN=3.6V, VOUT=1.8V, IOUT=0.2A/1.5A
REV1.0
- JUL 2012 RELEASED -
-6-

6 Page









A7122 pdf, datenblatt
AiT Semiconductor Inc.
www.ait-ic.com
Dimension in SOT-25 (Unit: mm)
A7122
DC-DC CONVERTER BUCK (STEP-DOWN)
2A 3MHz 6V SYNCHRONOUS BUCK CONVERTER
Symbol
A
A1
A2
b
c
D
E
E1
e
e1
L
θ
Min Max
1.000
1.300
0.000
0.400
0.700
0.900
0.300
0.500
0.100
0.250
2.700
3.100
1.500
1.800
2.500
3.100
0.950(BSC)
1.700
2.100
0.200MIN.
0° 8°
REV1.0
- JUL 2012 RELEASED -
- 12 -

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