Texas Instruments LM5021MMX-2/NOPB

Mfr. Part

LM5021MMX-2/NOPB

Manufacturer

Luminary Micro Texas Instruments

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Detailed Description

High-voltage PWM controller for isolated offline AC DC converters. Supports flyback and forward topologies. External MOSFET gate drive with current-mode control. Wide supply range 8 V to 30 V with 20 V start-up. Synchronization, soft-start, frequency control, and robust fault protection. Compact 8-VSSOP surface-mount package. RoHS3 compliant NOPB lead finish.

Key Features

Topologies supported flyback and forward

Output isolation supported

External switch required no internal MOSFET

Wide supply range 8 V to 30 V

Start-up threshold 20 V

Switching frequency up to 1 MHz

Max duty cycle 50 percent LM5021-2 variant

Control features frequency control soft start sync

Fault protection current limiting overload

Surface mount 8-VSSOP package

Operating junction temperature minus 40 C to plus 125 C

RoHS3 compliant lead free NOPB

Key Advantages

Flexible design across flyback and forward converters

High efficiency headroom with frequency control and duty limit

Strong protection helps prevent damage under fault

Wide input range simplifies auxiliary bias supply design

Small footprint reduces PCB area and height

Sync capability helps lower EMI and ease compliance

Simple compensation and soft-start enable smooth startup and stable loops

Packaging

Type Tape and Reel TR for automated pick and place

Package case 8-VSSOP also referenced as 8-TSSOP or 8-MSOP class with about 3.00 mm body width

Material Molded epoxy body with matte tin leads lead free per RoHS3 NOPB

Size Compact low profile 8-pin outline approximately 3.0 mm width small footprint for dense layouts

Mounting Surface mount suitable for reflow

Pin configuration 8 pins typically OUT gate driver VCC supply GND ground CS current sense FB feedback COMP compensation SS soft start RT or SYNC frequency and synchronization

Thermal characteristics TJ operating range minus 40 C to plus 125 C use solid ground plane and good thermal layout to manage dissipation

Electrical properties supply 8 V to 30 V start-up 20 V switching up to 1 MHz max duty 50 percent isolated output no internal switch

Lifecycle

Status Active and in regular production not nearing discontinuation

Equivalent or alternative models

- LM5021MMX-1/NOPB same family 80 percent max duty cycle version for different transformer utilization

- LM5021MM-2/NOPB same device supplied in cut tape

- Other orderable variants of LM5021 family may be available for different packing or automotive needs

For a broader cross-reference or alternatives from other brands please contact our sales team via the Y-IC website for detailed guidance.

Key Application Areas

Isolated flyback or forward AC DC power supplies

Industrial control and factory automation auxiliary supplies

Telecom and networking power modules and line powered adapters

Battery chargers adapters and embedded SMPS

Distributed power systems and housekeeping supplies in larger converters

Datasheet

Y-IC provides the most authoritative datasheet for LM5021MMX-2/NOPB on our product page. Download the datasheet here to get full specifications pin descriptions design equations and layout guidance.

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