LM2647LQ/NOPB Texas Instruments - Yeehing Electronics

5.5-V to 28-V, dual-channel synchronous buck controller

Pricing (USD)

Quantity	Unit Price
1 — 99	3.519
100 — 249	3.083
250 — 999	2.162
1,000 +	1.22

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	Switching Controllers
RoHS	Y
Topology	Buck
Number of Outputs	2 Output
Switching Frequency	500 kHz
Duty Cycle - Max	50 %
Input Voltage	5.5 V to 28 V
Output Voltage	0.6 V to 5 V
Output Current	20 A
Minimum Operating Temperature	- 5 C
Maximum Operating Temperature	+ 125 C
Mounting Style	SMD/SMT
Package / Case	LLP-28
Packaging	Reel
Description/Function	Dual channel voltage-mode controlled high-speed sychronous buck
Isolation	Non-Isolated
Operating Temperature Range	- 5 C to + 125 C
Output Type	Adjustable
Product	Synchronous Buck Controllers
Series	LM2647
Type	Synchronous Buck Controller
Brand	Texas Instruments
Shutdown	Shutdown
Operating Supply Current	2.5 mA
Operating Supply Voltage	4.5 V to 5.5 V
Product Type	Switching Controllers
Factory Pack Quantity	1000
Subcategory	PMIC - Power Management ICs
Unit Weight	0.002064 oz

For more information, please refer to datasheet

Documents

LM2647LQ/NOPB Datasheet

More Information

The LM2647 is an adjustable 200-500kHz dual channel voltage-mode controlled high-speed synchronous buck regulator controller ideally suited for battery powered applications such as laptop and notebook computers. The LM2647 requires only N-channel FETs for both the upper and lower positions of each synchronous stage. It features line feedforward to improve the response to input transients. At very light loads, the user can choose between the high-efficiency Pulse-skip mode or the constant frequency Forced-PWM mode. Lossless current limiting without the use of external sense resistors is made possible by sensing the voltage drop across the bottom FET. A unique adaptive duty cycle clamping technique is incorporated to significantly reduce peak currents under abnormal load conditions. The two independently programmable outputs switch 180° out of phase (interleaved switching) to reduce the input capacitor and filter requirements. The input voltage range is 5.5V to 28V while the output voltages are adjustable down to 0.6V.