LM2991S vs LM2991SX

This in-depth comparison of the LM2991S and LM2991SX provides valuable insights into their specifications and key features. We cover important factors in detail, including RoHS compliance, REACH status, series, mounting style, package type, and other relevant characteristics. Presenting the differences side by side simplifies component selection, making it easier for you to select the best option for your specific application.

Technical review by ETEI Component Engineering Source: manufacturer documentation

Parts at a glance

ISO9001 Quality Control ISO45001 ISO14001 100% Genuine
Part A

LM2991S

Texas Instruments

Lifecycle
Active
Stock
5555 PCS
Package
TO-263-5
Series
PMIC - Voltage Regulators - Linear
+BOM RFQ
Part B

LM2991SX

National Semiconductor

Lifecycle
Active
Stock
4339 PCS
Package
TO-263-5
Series
PMIC - Voltage Regulators - Linear
+BOM RFQ

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Full specification comparison

Use manufacturer datasheets as the final authority.

Specification LM2991S LM2991SX
Part Status Not For New Designs Active
Output Configuration Negative Negative
Output Type Adjustable Adjustable
Number of Regulators 1 1
Voltage - Input (Max) -26V -26V
Voltage - Output (Min/Fixed) -3V -3V
Voltage - Output (Max) -24V -24V
Voltage Dropout (Max) 1V @ 1A 1V @ 1A
Current - Output 1A 1A
Current - Quiescent (Iq) 0.7 mA 0.7 mA
Current - Supply (Max) 5 mA 5 mA
PSRR 60dB (1kHz) 60dB (1kHz)
Control Features Enable Enable
Protection Features Over Temperature, Short Circuit Over Temperature, Short Circuit
Operating Temperature -40°C ~ 125°C -40°C ~ 125°C
Mounting Type Surface Mount Surface Mount
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