Product Summary

The LM5642MH consists of two current mode synchronous buck regulator controllers operating 180° out of phase with each other at a normal switching frequency of 200kHz. The two switching regulator outputs of LM5642MH can also be paralleled to operate as a dual-phase, single output regulator.

Parametrics

LM5642MH absolute maximum ratings: (1)VIN, ILIM1, ILIM2, KS1, KS2: -0.3V to 38V; (2)SW1, SW2, RSNS1, RSNS2: -0.3 to (VIN + 0.3)V; (3)FB1, FB2, VDD1, VDD2: -0.3V to 6V; (4)SYNC, COMP1, COMP2, UV Delay: -0.3V to (VLIN5+0.3)V; (5)ON/SS1, ON/SS2: -0.3V to (VLIN5 +0.6)V; (6)CBOOT1, CBOOT2: 43V; (7)CBOOT1 to SW1, CBOOT2 to SW2: -0.3V to 7V; (8)LDRV1, LDRV2: -0.3V to (VDD+0.3)V; (9)HDRV1 to SW1, HDRV2 to SW2: -0.3V; (10)HDRV1 to CBOOT1, HDRV2 to CBOOT2: +0.3V; (11)Power Dissipation (TA = 25℃): 1.1W; (12)Ambient Storage Temp. Range: -65℃ to +150℃; (13)Soldering Dwell Time, Temp, Wave: 4 sec, 260℃; (14)Soldering Dwell Time, Temp, Infrared: 10sec, 240℃; (15)Soldering Dwell Time, Temp, Vapor Phase: 75sec, 219℃; (16)ESD Rating: 2kV.

Features

LM5642MH features: (1)Two synchronous buck regulators; (2)180° out of phase operation; (3)200kHz fixed nominal frequency; (4)4.5V to 36V input range; (5)50μA Shutdown current; (6)Adjustable output from 1.3V to 90% of Vin; (7)0.04% (typical) line and load regulation accuracy; (8)Current mode control with or without a sense resistor.

Diagrams

LM5642MH Connection Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM5642MH/NOPB
LM5642MH/NOPB
National Semiconductor (TI)
DC/DC Switching Controllers
Data Sheet
0-1: $2.36
1-10: $2.12
10-25: $1.89
25-50: $1.78
LM5642MHX/NOPB
LM5642MHX/NOPB
National Semiconductor (TI)
DC/DC Switching Controllers
Data Sheet
0-2010: $1.18
2010-2500: $1.18