EC1745NN is a Synchronous Buck Circuit with two current sense pins suitable for many multi-
output applications. It is designed to allow for operating a wide supply voltage range from 4.5V to
30V.This IC can operate in both Constant Current (CC) and Constant Voltage (CV) modes.
EC1745NN operates as a Buck Circuit providing a wide range of outputs at Constant Voltage (CV)
from 4.5V to 30V and the output current as high as 6A or above. It has a Constant Current (CC)
mode so that output current can be set externally and at an accuracy of ±4%.
The current mode control and external compensation makes feedback control have good line and
load regulation with flexible external design.
Vin: 4.5V to 30V
Vout: 3V to 28V; typical at 5V
Low Dropout Operation: Maximum Duty Cycle at 99.5%
Precision CC/CV Mode Control
Burst/PFM Mode for Increased Light Load Efficiency
2 outputs independent Constant Current setting
Hiccup mode when output voltage below 50% normal output voltage
NMOS peak current limit: accuracy:~20% Output short protection: reduce input current to less
than 20mA (RMS)
Output FB OVP (125% VFB), only turn off High side MOS.
Temperature shutdown (OTP)
Adjustable Output Cable Resistance Compensation
Switching Frequency: 375k+75k
Integrated Power MOSFET
USB Power Supplies with PD
General-Purpose DC/DC Application