Product Summary

The LM2642MTC is a two-phase synchronous step-down switching controller. The LM2642MTC consists of two current mode synchronous buck regulator controllers with a switching frequency of 300kHz. The two switching regulator controllers operate 180° out of phase. This feature reduces the input ripple RMS current, thereby significantly reducing the required input capacitance. The two switching regulator outputs of the LM2642MTC can also be paralleled to operate as a dual-phase single output regulator.

Parametrics

LM2642MTC absolute maximum ratings: (1)Ambient Storage Temperature Range: -65℃ to +150℃; (2)Vapor Phase: 4 sec, 260℃; (3)ESD Rating: 2kV; (4)VIN (VLIN5 tied to VIN): 4.5V to 5.5V; (5)VIN (VIN and VLIN5 separate): 5.5V to 30V; (6)Junction Temperature: -40℃ to +125℃.

Features

LM2642MTC features: (1)0.04% (typical) line and load regulatioerror; (2)Current mode control with or without a sense resistor; (3)Independent enable/soft-start pins allow simple sequential startup configuration; (4)Configurable for single output parallel operation; (5)Adjustable cycle-by-cycle current limit; (6)Input under-voltage lockout; (7)Output over-voltage latch protection; (8)Output under-voltage protectiowith delay; (9)Thermal shutdown; (10)Self discharge of output capacitors whethe regulator is OFF.

Diagrams

LM2642MTC Block Diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM2642MTC
LM2642MTC
National Semiconductor (TI)
DC/DC Switching Controllers
Data Sheet
0-240: $1.08
240-288: $1.06
288-528: $1.03
528-768: $1.01
LM2642MTC/NOPB
LM2642MTC/NOPB
National Semiconductor (TI)
DC/DC Switching Controllers
Data Sheet
0-1: $2.00
1-10: $1.79
10-25: $1.60
25-50: $1.51
LM2642MTCX/NOPB
LM2642MTCX/NOPB
National Semiconductor (TI)
DC/DC Switching Controllers
Data Sheet
0-1: $2.00
1-10: $1.79
10-25: $1.60
25-50: $1.51
LM2642MTCX
LM2642MTCX
National Semiconductor (TI)
DC/DC Switching Controllers
Data Sheet
0-2500: $1.00