TPS56300PWPR Equivalent & Substitute Parts

Part Overview

The TPS56300PWPR is a dual-output power management IC combining synchronous buck and linear (LDO) regulation topologies in a 28-HTSSOP package. This device integrates a step-down converter with programmable 2A output capability and a linear regulator, operating across a 2.8V to 5.5V supply range with 300kHz switching frequency. The product is classified as "Not For New Designs," making identification of functionally equivalent alternatives essential for ongoing system support and legacy design maintenance.

Substiute Parts

TPS56300PWPR

Texas InstrumentsIn Stock: 3798TPS56300PWPR Datasheet

Current PartRFQ

LM26420XMH/NOPB

Texas InstrumentsIn Stock: 180636LM26420XMH/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LM26420XMH/NOPB serves as a functional substitute based on the following critical parameters:

Substitution Criteria:

• Manufacturer alignment: Both Texas Instruments devices
• Topology compatibility: Buck switching regulator with synchronous rectification
• Output current rating: 2A capability maintained
• Supply voltage overlap: 3V to 5.5V input range (compatible with TPS56300PWPR's 2.8V minimum specification)
• Operating temperature range: Identical -40°C to 125°C specification
• Surface mount packaging: Both devices use PowerTSSOP form factors suitable for PCB integration
• Regulatory compliance: Both ROHS3 compliant with EAR99 classification

The LM26420XMH/NOPB operates at 2.2MHz switching frequency versus the TPS56300PWPR's 300kHz, representing a higher frequency design suitable for applications requiring reduced inductor size and improved transient response.

Parameter Comparison

Engineering Selection Recommendations

TPS56300PWPR Continued Use: The TPS56300PWPR remains suitable for legacy system maintenance and repair applications where existing designs are locked. The device maintains full ROHS3 compliance and operates within specified temperature ranges. Inventory availability of 3,778 units supports near-term supply requirements.

LM26420XMH/NOPB as Active Alternative: The LM26420XMH/NOPB is classified as Active product status, providing long-term supply assurance and manufacturing continuity. This device offers superior moisture sensitivity rating (MSL 1 vs. MSL 2), reducing handling and storage constraints. The higher 2.2MHz switching frequency enables more compact power stage design compared to the 300kHz TPS56300PWPR. Inventory depth of 180,607 units ensures availability for volume production.

Package Consideration: The LM26420XMH/NOPB uses a 20-pin PowerTSSOP package versus the 28-pin package of the TPS56300PWPR. PCB layout redesign is required for substitution, as pin counts and pinout differ. The reduced pin count reflects the LM26420XMH/NOPB's single-output buck topology versus the dual-output (buck + LDO) configuration of the TPS56300PWPR.

Frequently Asked Questions (FAQ)

Q: Can the LM26420XMH/NOPB directly replace the TPS56300PWPR on existing PCBs?

A: No. The LM26420XMH/NOPB uses a 20-pin PowerTSSOP package while the TPS56300PWPR uses 28-pin PowerTSSOP. Pinout and pin count differences require PCB layout redesign. Additionally, the LM26420XMH/NOPB provides only buck regulation; applications requiring the integrated LDO output of the TPS56300PWPR must implement a separate linear regulator.

Q: What is the minimum input voltage difference between these devices?

A: The TPS56300PWPR operates from 2.8V minimum input, while the LM26420XMH/NOPB requires 3V minimum. Applications with input voltages between 2.8V and 3V cannot use the LM26420XMH/NOPB as a substitute.

Q: How do the switching frequencies affect component selection?

A: The TPS56300PWPR operates at 300kHz, requiring larger inductors and output capacitors. The LM26420XMH/NOPB operates at 2.2MHz, enabling significantly smaller passive components and reducing overall power stage footprint. Frequency selection impacts EMI characteristics, efficiency curves, and thermal performance.

Q: Are both devices suitable for new production designs?

A: The TPS56300PWPR is classified "Not For New Designs," limiting its use to legacy system support. The LM26420XMH/NOPB carries Active product status, making it appropriate for new production designs with long-term supply assurance.

Q: What are the moisture sensitivity implications?

A: The TPS56300PWPR has MSL 2 rating (1-year floor life), requiring controlled storage and handling. The LM26420XMH/NOPB has MSL 1 rating (unlimited floor life), reducing moisture-related failure risk and simplifying inventory management for high-volume manufacturing.

Q: Do both devices meet the same regulatory standards?

A: Yes. Both devices are ROHS3 compliant, carry EAR99 ECCN classification, and are REACH unaffected. Regulatory compliance is equivalent for both parts.