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LM9071S Linear Voltage Regulator IC
Part Overview
The LM9071S is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 250mA current capacity in a TO-263 (DDPAK-5) surface mount package. This device is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The regulator integrates comprehensive protection features including over-temperature, over-voltage, reverse polarity, and short-circuit protection, making it suitable for cost-sensitive power management circuits requiring fixed 5V regulation.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Voltage - Output (Min/Fixed) | 5V |
| Voltage - Input (Max) | 26V |
| Current - Output | 250mA |
| Voltage Dropout (Max) | 0.8V @ 250mA |
| Current - Quiescent (Iq) | 4 mA |
| PSRR | 60dB (120Hz) |
| Protection Features | Over Temperature, Over Voltage, Reverse Polarity, Short Circuit |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab), TO-263BA |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the LM9071S is determined by strict equivalence across the following critical parameters:
- Output voltage specification: Fixed 5V output
- Output current capacity: 250mA minimum
- Input voltage rating: 26V maximum
- Voltage dropout characteristics: 0.8V @ 250mA maximum
- Package compatibility: TO-263 (DDPAK-5) surface mount
- Protection feature set: Over-temperature, over-voltage, reverse polarity, and short-circuit protection
- Operating temperature range: -40°C to 125°C
The LM9071S/NOPB variant qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction between these parts is product status and RoHS compliance certification, not functional or electrical parameters.
Parameter Comparison
| Parameter | LM9071S | LM9071S/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Output Configuration | Positive | Positive |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 5V | 5V |
| Voltage - Input (Max) | 26V | 26V |
| Current - Output | 250mA | 250mA |
| Voltage Dropout (Max) | 0.8V @ 250mA | 0.8V @ 250mA |
| Current - Quiescent (Iq) | 4 mA | 4 mA |
| PSRR | 60dB (120Hz) | 60dB (120Hz) |
| Protection Features | Over Temperature, Over Voltage, Reverse Polarity, Short Circuit | Over Temperature, Over Voltage, Reverse Polarity, Short Circuit |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab), TO-263BA | TO-263-6, D2PAK (5 Leads + Tab), TO-263BA |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging | Not specified | Tube |
Engineering Selection Recommendations
The LM9071S/NOPB is a direct functional equivalent to the LM9071S with identical electrical and mechanical specifications. The LM9071S/NOPB is the preferred selection for new designs and ongoing production due to its active product status and ROHS3 compliance certification. The LM9071S remains available for legacy system maintenance where RoHS non-compliant components are acceptable. Both parts are manufactured by Texas Instruments and maintain identical performance characteristics across all specified electrical parameters, dropout voltage, quiescent current, and protection features.
Frequently Asked Questions (FAQ)
Q: Can LM9071S/NOPB be used as a direct replacement for LM9071S in existing designs?
A: Yes. The LM9071S/NOPB is electrically and mechanically identical to the LM9071S. Both devices provide 5V fixed output at 250mA with identical dropout voltage, quiescent current, PSRR, and protection features. The TO-263 package pinout and footprint are identical.
Q: What is the difference between LM9071S and LM9071S/NOPB?
A: The primary differences are product status and RoHS compliance. The LM9071S is obsolete and RoHS non-compliant, while the LM9071S/NOPB is active and ROHS3 compliant. All electrical and mechanical specifications are identical.
Q: Are there any package differences between these parts?
A: Both parts use the TO-263 (DDPAK-5) surface mount package. The LM9071S/NOPB is supplied in tube packaging, while the LM9071S packaging is not specified. The physical package dimensions and PCB footprint are identical.
Q: What protection features are included in these regulators?
A: Both the LM9071S and LM9071S/NOPB include over-temperature, over-voltage, reverse polarity, and short-circuit protection.
Q: What is the maximum input voltage for these devices?
A: The maximum input voltage rating is 26V for both the LM9071S and LM9071S/NOPB.
Q: What is the operating temperature range?
A: Both devices operate across -40°C to 125°C.
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