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LM337LMX Equivalent & Substitute Parts Reference
Part Overview
The LM337LMX from Texas Instruments is a linear voltage regulator IC, specifically designed for negative adjustable output applications in Power Management (PMIC). Featuring one output, an adjustable negative voltage range, and a 100mA maximum output current, it is packaged in an 8-SOIC surface-mount format. The LM337LMX part is currently listed as obsolete, necessitating the identification of direct equivalents or substitutes to ensure continued support for existing designs requiring these precise electrical and mechanical parameters.
Substiute Parts
Key Parameters
| Manufacturer Part Number | Manufacturer | Category | Description | Output Configuration | Output Type | Number of Regulators | Voltage - Input (Max) | Voltage - Output (Min/Fixed) | Voltage - Output (Max) | Current - Output | PSRR | Protection Features | Operating Temperature | Mounting Type | Package / Case | Supplier Device Package | RoHS Status | MSL | REACH Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LM337LMX | Texas Instruments | Power Management (PMIC) | IC REG LIN NEG ADJ 100MA 8SOIC | Negative | Adjustable | 1 | -40V | -1.2V | -37V | 100mA | 60dB (120Hz) | Over Temperature, Short Circuit | -25°C ~ 125°C | Surface Mount | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | ROHS3 Compliant | 1 (Unlimited) | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution for the LM337LMX is determined strictly by matching all provided key electrical and mechanical parameters. Equivalent parts must maintain identical output configuration (negative), output type (adjustable), regulator count (1), input and output voltage ranges, output current capability, package outline (8-SOIC), mounting type, protection features, operating temperature, and compliance criteria (RoHS, REACH, MSL). Only substitutes meeting all these explicit parameters are included.
Parameter Comparison
| Parameter | LM337LMX | LM337LMX/NOPB |
|---|---|---|
| Manufacturer Part Number | LM337LMX | LM337LMX/NOPB |
| Manufacturer | Texas Instruments | Texas Instruments |
| Category | Power Management (PMIC) | Power Management (PMIC) |
| Description | IC REG LIN NEG ADJ 100MA 8SOIC | IC REG LIN NEG ADJ 100MA 8SOIC |
| Output Configuration | Negative | Negative |
| Output Type | Adjustable | Adjustable |
| Number of Regulators | 1 | 1 |
| Voltage - Input (Max) | -40V | -40V |
| Voltage - Output (Min/Fixed) | -1.2V | -1.2V |
| Voltage - Output (Max) | -37V | -37V |
| Current - Output | 100mA | 100mA |
| PSRR | 60dB (120Hz) | 60dB (120Hz) |
| Protection Features | Over Temperature, Short Circuit | Over Temperature, Short Circuit |
| Operating Temperature | -25°C ~ 125°C | -25°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SOIC | 8-SOIC |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The LM337LMX is marked as obsolete. The LM337LMX/NOPB part maintains active status and full parametric equivalence. Both components conform to ROHS3 compliance, MSL 1 (Unlimited), and REACH unaffected status. Selection of LM337LMX/NOPB ensures continued supply chain confidence and regulatory compliance for all applications originally designed for LM337LMX, given strict parity in all characterized electrical, mechanical, and compliance parameters.
Frequently Asked Questions (FAQ)
Q: Can LM337LMX/NOPB be used as a direct replacement for LM337LMX?
A: Yes, LM337LMX/NOPB matches all key electrical, mechanical, and compliance parameters provided for LM337LMX.
Q: Are package dimensions and mounting type identical between LM337LMX and LM337LMX/NOPB?
A: Both parts utilize the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring physical compatibility.
Q: Is the operating temperature range consistent between the main and substitute parts?
A: Both LM337LMX and LM337LMX/NOPB specify an operating temperature range of -25°C ~ 125°C.
Q: Are protection features and output characteristics maintained in the substitute part?
A: Over temperature and short circuit protections, negative adjustable output, and single regulator configuration are present and identical in LM337LMX/NOPB.
Q: Do both LM337LMX and LM337LMX/NOPB satisfy RoHS and REACH compliance requirements?
A: Both parts are stated as ROHS3 Compliant and REACH Unaffected, with MSL 1 (Unlimited), matching regulatory and handling requirements.
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