LM46002 Synchronous Step-Down Voltage Converter

Specifications

Product Overview

The LM46002 is a Texas Instruments synchronous step-down voltage converter categorized under Power_Management. It operates from a recommended VIN to PGND range of 3.5-60 V and provides a recommended 0-2 A output current with a 1-28 V output voltage range. The device includes an adjustable 200 kHz-2.2 MHz switching frequency, with a 500 kHz default when the RT pin is left floating.

The package is a 16-lead HTSSOP / PWP measuring 6.60 mm × 5.10 mm × 1.2 mm with 0.65-mm lead pitch. Thermal data for this package includes 38.9 °C/W junction-to-ambient resistance on a JESD51-7 4-layer board at 2 W dissipation, 24.3 °C/W junction-to-case top, 19.9 °C/W junction-to-board, and 1.7 °C/W junction-to-case bottom.

Device implementation details include a 470 nF bootstrap capacitor from CBOOT to SW, a 1-10 µF BIAS bypass capacitor when BIAS is used, and an open-drain PGOOD output with a 10 kΩ-100 kΩ pullup to 12 V or less. Protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limit, and output short-circuit hiccup protection.

Key Features

• 3.5-60 V recommended VIN to PGND operating range
• 0-2 A recommended output current capability
• 1-28 V recommended output voltage range
• 27 µA quiescent current in regulation
• 200 kHz-2.2 MHz adjustable switching frequency
• 500 kHz default frequency with RT floating
• 4.1 ms internal soft-start function
• 1.2 V enable threshold for internal VCC LDO
• Open-drain PGOOD with 10 kΩ-100 kΩ pullup
• Thermal shutdown and cycle-by-cycle current limit protection

Typical Applications

• Wide-input step-down conversion
• 2 A regulated output rails
• 1-28 V output supplies
• Power systems using PGOOD monitoring
• BIAS-assisted buck regulator designs
• Adjustable-frequency power converters
• HTSSOP power management assemblies

Procurement Notes

When requesting a quote for LM46002, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.

If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.

For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.