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Details for LM3485MM by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Power Management
BUCK CONTROLLER PFET SMD MSOP8
LM3485MM image

LM3485MM by Texas Instruments

BUCK CONTROLLER PFET SMD MSOP8

Features
1.242-V to VIN Adjustable Output Range
100% Duty Cycle
4.5-V to 35-V Wide Input Range
Current Limit Protection
Easy-to-Use Control Methodology
High Efficiency 93%
Maximum Operating Frequency > 1 MHz
No Control-Loop Compensation Required
u00b11.3% (u00b12% Over Temp) Internal Reference

Part Information

LM3485MM image
RoHS Compliant

Description

The LM3485 is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low-cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control-loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultralow dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. Current limit protection is provided by measuring the voltage across the RDS(ON) of the PFET, thus eliminating the need for a sense resistor. The cycleby-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

Technical Specifications

Supply Voltage Min:
4.5V
Supply Voltage Max:
35V
No. of Outputs:
1 Output, 1Outputs
Duty Cycle (%):
100%
Controller IC Case Style:
VSSOP
No. of Pins:
8Pins
Switching Frequency:
1MHz
Topology:
Buck (Step Down)
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Product Range:
-
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
-
SVHC:
No SVHC (27-Jun-2018)
Adjustable Output Voltage Min:
1.242V
Base Number:
3485
Frequency:
1MHz
Input Voltage:
-0.3V
Input Voltage Max:
36V
Operating Temperature Range:
-40°C to +125°C
Output Current:
4A
Output Current Max:
0.44A
Termination Type:
Surface Mount Device
Voltage Regulator Type:
Buck

Alternate Descriptions

DC DC Cntrlr Single-OUT Buck 4.5V to 35V Input 8-Pin MSOP T/R Avnet America