General Description
TD1489 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 4.7V to 40V.This IC can operate in both Constant
Current (CC) and Constant Voltage (CV) modes.
TD1489 operates as a Buck Circuit providing a wide range of
outputs at Constant Voltage (CV) from 4.7V to 40V 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.

Features
 Vin: 4.7V to 40V
 Vout: 1.2V to Vin*97%V; typical at 5V
 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
 Protection:
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: 125k+25k
 Integrated Power MOSFET
 QFN32L Package

Applications
 Car Charger
 High-Brightness Lighting
 General-Purpose DC/DC Application