1.5-A, negative, adjustable linear voltage regulator
Product details
Parameters
Package | Pins | Size
Features
- 1.5-A Output Current
- Line Regulation 0.01%/V (Typical)
- Load Regulation 0.3% (Typical)
- 77-dB Ripple Rejection
- 50 ppm/°C Temperature Coefficient
- Thermal Overload Protection
- Internal Short-Circuit Current Limiting
Protections
Description
The LM137 and LM337-N are adjustable 3-terminal negative voltage regulators capable of supplying –1.5 A or more currents over an output voltage range of –1.25 V to –37 V. It requires only two external resistors to set the output voltage and one output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 and LM337-N feature internal current limiting, thermal shutdown and safe-area compensation, making it virtually blowout-proof against overloads.
The LM137 and LM337-N are ideal complements to the LM117 and LM317 adjustable positive regulators. The LM137 has a wider operating temperature range than the LM337-N and is also offered in military and space qualified versions.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | LM137, LM337-N 3-Terminal Adjustable Negative Regulators datasheet (Rev. E) | Jan. 13, 2016 |
| Technical articles | LDO basics: capacitor vs. capacitance | Aug. 01, 2018 | |
| Technical articles | LDO Basics: Preventing reverse current | Jul. 25, 2018 | |
| Technical articles | LDO basics: introduction to quiescent current | Jun. 20, 2018 | |
| Technical articles | LDO basics: noise – part 1 | Jun. 14, 2017 | |
| User guide | LM317A-337N-EVM User's Guide | Jan. 21, 2016 | |
| Application note | Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) | May 05, 2013 | |
| Application note | LB-46 A New Production Technique for Trimming Voltage Regulators | May 15, 2004 | |
| Application note | A New Production Technique for Trimming Voltage Regulators | Oct. 03, 2002 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LM317A-337N-EVM demonstrates canonical application of the LM317A adjustable regulator and its negative complement, the LM337-N. The evaluation module (EVM) is assesmbled with the SOT-223 package option for each device, supplying up to 1 A of load current. The EVM is designed for easy (...)
Features
- Output adjustable from 1.2 V to 37 V for LM317A and –1.2 V to –37 V for LM337-N
- 1-A load current with 1.5-A option
- Heat sink space provided for TO-220
- Large capacitor footprint space for customer selection
Design tools & simulation
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOT-223 (DCY) | 4 | View options |
| TO-220 (NDE) | 3 | View options |
| TO-220 (NDG) | 3 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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