LP3962ET-1.8 Equivalent & Substitute Parts

Part Overview

The LP3962ET-1.8 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 1.5A in a TO-220-5 package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The LP3962ET-1.8 provides regulated power management with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring stable 1.8V rails with moderate current demands.

Substiute Parts

LP3962ET-1.8

Texas InstrumentsIn Stock: 2176LP3962ET-1.8 Datasheet

Current PartRFQ

LP3852ET-1.8/NOPB

Texas InstrumentsIn Stock: 1143LP3852ET-1.8/NOPB Datasheet

Parametric EquivalentRFQ

LP3965ET-1.8/NOPB

Texas InstrumentsIn Stock: 1113LP3965ET-1.8/NOPB Datasheet

Parametric EquivalentRFQ

LP3855ET-1.8/NOPB

Texas InstrumentsIn Stock: 860LP3855ET-1.8/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP3962ET-1.8 is determined by the following critical parameters:

• Output voltage: 1.8V fixed
• Maximum output current: 1.5A
• Maximum input voltage: 7V
• Package type: TO-220-5 Formed Leads
• Protection features: Over-current, over-temperature, short-circuit protection
• Control features: Enable function
• Operating temperature range: -40°C ~ 125°C
• RoHS3 compliance

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional equivalence in applications designed for the LP3962ET-1.8. Differences in quiescent current, dropout voltage, and product status are noted for design consideration but do not preclude substitution where the primary performance criteria are met.

Parameter Comparison

Engineering Selection Recommendations

The LP3962ET-1.8 is obsolete; active substitute parts are LP3852ET-1.8/NOPB, LP3965ET-1.8/NOPB, and LP3855ET-1.8/NOPB. All substitutes maintain identical output voltage, current rating, input voltage range, package configuration, and protection feature set.

LP3852ET-1.8/NOPB and LP3855ET-1.8/NOPB offer improved performance characteristics with lower dropout voltage (0.38V versus 0.55V) and reduced quiescent current (3 mA versus 9 mA), resulting in lower power dissipation. These parts are active products with unlimited moisture sensitivity rating, providing superior long-term supply chain availability and storage flexibility.

LP3965ET-1.8/NOPB maintains electrical specifications identical to the original LP3962ET-1.8, including dropout voltage and quiescent current, and is an active product. This part provides direct functional equivalence with improved product lifecycle status.

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Selection between substitutes depends on application requirements for power efficiency and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can LP3852ET-1.8/NOPB, LP3965ET-1.8/NOPB, or LP3855ET-1.8/NOPB be used as direct replacements for LP3962ET-1.8?

A: Yes. All three parts are parametric equivalents with identical output voltage (1.8V), output current (1.5A), input voltage range (7V maximum), package type (TO-220-5), and protection features. Electrical and mechanical compatibility is confirmed.

Q: What is the difference between LP3852ET-1.8/NOPB and LP3965ET-1.8/NOPB?

A: LP3852ET-1.8/NOPB features lower dropout voltage (0.38V) and quiescent current (3 mA) compared to LP3965ET-1.8/NOPB (0.55V dropout, 9 mA quiescent). LP3852ET-1.8/NOPB also provides specified PSRR performance (73dB ~ 57dB at 120Hz). Both are active products with unlimited moisture sensitivity rating.

Q: Why does LP3962ET-1.8 have a higher moisture sensitivity level (MSL 3) than the substitute parts (MSL 1)?

A: Moisture sensitivity level reflects component storage and handling requirements. MSL 3 requires storage at controlled humidity for 168 hours maximum before soldering. Substitute parts with MSL 1 (unlimited) offer greater flexibility in storage and handling without time-based constraints.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. LP3852ET-1.8/NOPB, LP3965ET-1.8/NOPB, and LP3855ET-1.8/NOPB are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Which substitute part should be selected for power-sensitive applications?

A: LP3852ET-1.8/NOPB or LP3855ET-1.8/NOPB are recommended for power-sensitive applications due to reduced quiescent current (3 mA versus 9 mA) and lower dropout voltage (0.38V versus 0.55V), resulting in lower overall power dissipation.

Q: Is the TO-220-5 package identical across all parts?

A: Yes. All parts use TO-220-5 Formed Leads with through-hole mounting, ensuring identical PCB footprint and thermal characteristics.