ACE7255E

24V, 2A, Forced PWM Synchronous Step-Down Converter

VER 1.1

1

Description

ACE7255E is a wide input range, high-efficiency and high frequency DC-to-DC step-down switching

regulator, capable of delivering up to 2A of output current. With a fixed switching frequency of

1MHz, this current mode PWM controlled converter allows the use of small external components, such as

ceramic input and output caps, as well as small inductors. ACE7255E also employs a forced PWM control

scheme, thereby ensuring the minimum ripple voltage. Its input can withstand a voltage surge as high as

30V, making it an ideal solution for industrial applications such as Surveillance Camera, LCD TV, Set Top

Box, etc.

Features



Wide Input Range: 4.2V-24V



Forced PWM control



1MHz switching frequency



Capable of Delivering 2A



No External Compensation Needed



Current Mode Control



Thermal Shutdown and UVLO



Excellent Load and Line Transient Response

Application



Surveillance Camera



Set Top Box



LCD TV

Absolute Maximum Rating

Parameter

Value

IN,SW,EN Voltage

–0.3V to 24V

BST Voltage

–0.3V to SW+6V

FB Voltage

–0.3V to 6V

Operating Temperature Range

–40°C to 85°C

Storage Temperature Range

–55°C to 150°C

Thermal Resistance

180°C/W

90°C/W

Lead Temperature (Soldering 10ssec)

260°C

ESD HBM (Human Body Mode)

2KV

ESD MM (Machine Mode)

200V

(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long

periods may affect device reliability.)