LM20343MHE Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The LM20343MHE is a 3A step-down (buck) switching regulator from Texas Instruments using current-mode PWM control, part of the POWERWISE family. It accepts an input voltage range of 4.5V to 36V and produces an adjustable output from 0.8V to 5V, operating at a fixed switching frequency for stable performance. Packaged in a 20-pin HTSSOP with PowerPAD, it delivers high efficiency for industrial and telecom power supply designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- LM20343MHE Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3A peak output current with input range of 4.5V to 36V for industrial applications
- Adjustable output voltage from 0.8V to 5V via external resistor divider
- Current-mode PWM control for fast transient response and inherent current limiting
- POWERWISE technology for optimized efficiency across the full load range
- Integrated soft-start and overcurrent protection reduce external component count
- 20-pin HTSSOP PowerPAD package for enhanced thermal dissipation
Applications
The LM20343MHE is commonly used in industrial power supplies, telecommunications equipment, and server infrastructure requiring a compact, high-efficiency step-down converter with a wide input range. It is also applied in distributed power architectures to generate point-of-load voltages for FPGAs, DSPs, microprocessors, and high-current analog circuits.
Specifications
| Pbfree Code | No |
| YTEOL | 0 |
| Additional Feature | OUTPUT VOLTAGE IS ADJUSTABLE FROM 0.8 TO 5 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 36V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 6A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 825kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| ## LM20343MHE Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM20343MHE:
Switching Regulator, Current-mode, 6A, 825kHz Switching Freq-Max, PDSO20
suggested
Frequently Asked Questions
What is the input voltage range and maximum output current of the LM20343MHE?
The LM20343MHE accepts an input voltage from 4.5V to 36V and can supply up to 3A of output current. The wide input range makes it suitable for industrial applications powered from unregulated 12V, 24V, or 28V bus rails.
What output voltage range does the LM20343MHE support?
The LM20343MHE output voltage is adjustable from 0.8V to 5V using an external resistor divider connected to the feedback pin. This flexibility allows the device to power a wide range of digital and analog loads with different voltage requirements.
What protection features does the LM20343MHE include?
The LM20343MHE integrates overcurrent protection via current-mode control, a soft-start function to limit inrush current during startup, and thermal shutdown protection. These built-in protections reduce the need for external protection components and improve system reliability.
What package does the LM20343MHE use and is it lead-free?
The LM20343MHE is housed in a 20-pin HTSSOP package with an exposed PowerPAD thermal slug for efficient heat dissipation. Note that the Pbfree Code is listed as No for this part, so buyers should verify lead-free requirements against the specific version before ordering for RoHS-restricted applications.
Related Guides
TPS54160DGQR Selection Guide: How to Choose a 60V Step-Down Buck Converter
Complete selection guide for the TPS54160DGQR 60V/1.5A step-down converter. Compare specs, alternatives, and sourcing options for industrial and automotive designs.
May 20, 2026
LMV932MM Dual Low-Voltage CMOS Op-Amp: Application Design Guide
Complete application design guide for the LMV932MM dual rail-to-rail CMOS op-amp: supply decoupling, RRIO design rules, stability, and recommended circuits for 1.8V–5.5V battery-powered systems.
May 20, 2026
TL084CN Equivalent and Replacements: JFET-Input Quad Op-Amp Comparison Guide
Compare TL084CN with TL074, LF347, and LM324 quad op-amps. Pin-compatible equivalents, key specs, and when to choose each for your analog design.
May 20, 2026
TPS386000RGPR Quad Voltage Supervisor: Selection and Sourcing Guide (2025)
Compare TPS386000RGPR with TPS386040RGPR, TPS3700, and TPS3823 voltage supervisors. Key specs, threshold programming, watchdog options, and sourcing tips.
May 20, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
LM1117IDTX-5.0/NOPB
Other
Integrated Circuit
LMH6738MQ/NOPB
Small Outline Packages
Integrated Circuit
DS75176BM/NOPB
Small Outline Packages
Integrated Circuit
OPA378AIDBVR
SOT23 (5-Pin)
Integrated Circuit
LM95214CISD/NOPB
Small Outline No-lead
Integrated Circuit
CLC020BCQ
Plastic Leaded Chip Carrier
Integrated Circuit
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”