CONVERTER BUCK. A7425 Datasheet


A7425 BUCK. Datasheet pdf. Equivalent


Part Number

A7425

Description

DC-DC CONVERTER BUCK

Manufacture

AiT Semiconductor

Total Page 18 Pages
Datasheet
Download A7425 Datasheet


A7425
AiT Semiconductor Inc.
www.ait-ic.com
A7425
DC-DCCONVERTER BUCK(STEP-DOWN)
40V, 2.5A,500kHzSYNCHRONOUS
DESCRIPTION
A7425 is a wide input voltage, high efficiency
current mode Synchronous step-down DC/DC
converter. A7425 provides up to 2.5A output current
at 500kHz switching frequency.
A7425 integrates a 130mΩ high side and an 80mΩ
low side MOSFET to achieve high conversion
efficiency up to 96%. The current mode control
architecture supports fast transient response and
simple compensation circuit.
Protection features include cycle-by-cycle current
limit, thermal shutdown, and short circuit protection.
The A7425 is available in SOP8 package.
ORDERING INFORMATION
Package Type
Part Number
SOP8
A7425M8R
M8
SPQ: 4,000pcs/Reel
A7425M8VR
Note
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
FEATURES
Up to 40V Input Surge Voltage
Continuous Operating Input Voltage up to 36V
Up to 2.5A Output Current
500kHz Switching Frequency
Up to 96% Efficiency
Stable with Low-ESR Ceramic Output
Capacitors
Resistor Programmable High-Side MOSFET
Peak Current Limit from 1.0A to 3.5A
±2% Feedback Voltage Accuracy
Power Saving Mode reduces the quiescent
current to 0.9mA
Advanced Feature Set
Integrated Soft-Start of Thermal Shutdown
Cycle-by-Cycle Current Limit protection
Available in SOP8 package
APPLICATION
Distributed Power Systems
Notebook Computers
Broadband Communications
Flat Panel TVs and Monitors
Vehicle Electronics
TYPICAL APPLICATION
REV1.1 - MAR 2019 RELEASED, SEP 2019 UPDATED -
-1-

A7425
AiT Semiconductor Inc.
www.ait-ic.com
PIN DESCRIPTION
A7425
DC-DCCONVERTER BUCK(STEP-DOWN)
40V, 2.5A,500kHzSYNCHRONOUS
Pin #
1
2
3
4
5
6
7
8
Symbol
SW
BS
EN
GND
FB
COMP
ISET
IN
Top View
Function
Power Switching Output to External Inductor.
High Side Bias Pin. This provides power to the internal high-side
MOSFET gate driver.
Connect a 100nF capacitor from BS pin to SW pin.
Enable Input. EN is pulled up to 5V with a 2MΩ resistance, and contains a
precise 2V logic threshold. Drive this pin to a logic-high or leave
unconnected to enable the IC.
Drive to a logic-low to disable the IC and enter shutdown mode.
Ground. Connect this pin to a large PCB copper area for best heat
dissipation. Return FB, COMP, and ISET to this GND, and connect this
GND to power GND at a single point for best noise immunity.
Feedback Input. The voltage at this pin is regulated to 0.8V. Connect to
the resistor divider between output and GND to set the output voltage.
Error Amplifier Output. This pin is used to compensate the converter.
Output Current Setting Pin. Connect a resistor from ISET to GND to
program the output current limit.
Power Supply Input. Bypass this pin with a suitable large ceramic
capacitor to GND, placed as close to the IC as possible.
REV1.1 - MAR 2019 RELEASED, SEP 2019 UPDATED -
-2-


Features AiT Semiconductor Inc. www.ait-ic.com A 7425 DC-DCCONVERTER BUCK(STEP-DOWN) 40V , 2.5A,500kHzSYNCHRONOUS DESCRIPTION A 7425 is a wide input voltage, high effi ciency current mode Synchronous step-do wn DC/DC converter. A7425 provides up t o 2.5A output current at 500kHz switchi ng frequency. A7425 integrates a 130mΩ high side and an 80mΩ low side MOSFET to achieve high conversion efficiency up to 96%. The current mode control arc hitecture supports fast transient respo nse and simple compensation circuit. Pr otection features include cycle-by-cycl e current limit, thermal shutdown, and short circuit protection. The A7425 is available in SOP8 package. ORDERING INF ORMATION Package Type Part Number SO P8 A7425M8R M8 SPQ: 4,000pcs/Reel A 7425M8VR Note V: Halogen free Package R: Tape & Reel AiT provides all RoHS products FEATURES  Up to 40V Input Surge Voltage  Continuous Operating Input Voltage up to 36V  Up to 2.5A Output Current  500kHz Switching Frequency  Up to 96% Efficiency  St.
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