A7222 CONVERTER BUCK Datasheet

A7222 Datasheet, PDF, Equivalent


Part Number

A7222

Description

DC-DC CONVERTER BUCK

Manufacture

AiT Semiconductor

Total Page 13 Pages
Datasheet
Download A7222 Datasheet


A7222
AiT Semiconductor Inc.
www.ait-ic.com
A7222
DC-DC CONVERTER BUCK (STEP-DOWN)
500kHz, 18V, 2A SYNCHRONOUS
DESCRIPTION
The A7222 is a fully integrated, high-efficiency 2A
synchronous rectified step-down converter. The
A7222 operates at high efficiency over a wide
output current load range.
This device offers two operation modes, PWM
control and PFM Mode switching control, which
allows a high efficiency over the wider range of the
load.
The A7222 is available in SOT-26 package.
ORDERING INFORMATION
Package Type
SOT-26
SPQ: 3,000pcs/Reel
Note
Part Number
E6
A7222E6R
A7222E6VR
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
TYPICAL APPLICATION
FEATURES
High Efficiency: Up to 96%
500kHz Frequency Operation
2A Output Current
No Schottky Diode Required
4.2V to 18V Input Voltage Range
0.8V Reference
Slope Compensated Current Mode Control for
Excellent Line and Load Transient Response
Integrated internal compensation
Stable with Low ESR Ceramic Output
Capacitors
Over Current Protection with Hiccup-Mode
Thermal Shutdown
Inrush Current Limit and Soft Start
-40°C to +85°C Temperature Range
Available in SOT-26 package
APPLICATION
Distributed Power Systems
Digital Set Top Boxes
Flat Panel Television and Monitors
Wireless and DSL Modems
Notebook Computer
Figure 1.
Figure 2.
NOTE1: C1 and C2 recommended using 22uF ceramic capacitors. If the electrolytic capacitor is used, it is recommended that the ceramic
capacitor in parallel with a capacitance value of 0.1uF or more.
NOTE2: The resistance R3 in Figure 1 makes the loop more stable. If it isn’t used, the resistance R1R2 should be adjusted(See
Figure2.). The value of R1 is recommended to be about 300kΩ.
NOTE3: C3 can be valued as 1uF, 0.1uF.
REV1.1
- SEP 2016 RELEASED, JUL 2019 UPDATED -
-1-

A7222
AiT Semiconductor Inc.
www.ait-ic.com
PIN DESCRIPTION
A7222
DC-DC CONVERTER BUCK (STEP-DOWN)
500kHz, 18V, 2A SYNCHRONOUS
Pin #
1
2
3
4
5
6
Symbol
GND
SW
V IN
FB
EN
BST
Top View
Function
Ground
Switching Pin
Power supply Pin
Adjustable version feedback input. Connect FB to the center point of
the external resistor divider.
Drive this pin to a logic-high to enable the IC. Drive to a logic-low to
disable the IC and enter micro-power shutdown mode.
Boostrap. A capacitor connected between SW and BST pins is
required to form a floating supply across the high-side switch driver.
REV1.1
- SEP 2016 RELEASED, JUL 2019 UPDATED -
-2-


Features AiT Semiconductor Inc. www.ait-ic.com A 7222 DC-DC CONVERTER BUCK (STEP-DOWN) 5 00kHz, 18V, 2A SYNCHRONOUS DESCRIPTION The A7222 is a fully integrated, high- efficiency 2A synchronous rectified ste p-down converter. The A7222 operates at high efficiency over a wide output cur rent load range. This device offers two operation modes, PWM control and PFM M ode switching control, which allows a h igh efficiency over the wider range of the load. The A7222 is available in SOT -26 package. ORDERING INFORMATION Pac kage Type SOT-26 SPQ: 3,000pcs/Reel Not e Part Number E6 A7222E6R A7222E6VR V: Halogen free Package R: Tape & Ree l AiT provides all RoHS products TYPI CAL APPLICATION FEATURES  High Effi ciency: Up to 96%  500kHz Frequency Operation  2A Output Current  No Schottky Diode Required  4.2V to 18V Input Voltage Range  0.8V Reference  Slope Compensated Current Mode Con trol for Excellent Line and Load Transi ent Response  Integrated internal compensation  Stable with Low ESR Ceramic.
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