Product Overview
The LMZ31520RLG from Texas Instruments is a 20A SIMPLE SWITCHER power module with 3.0V to 14.5V input in a 72-BQFN (15x16x5.8mm) package. It integrates a DC/DC converter with power MOSFETs, shielded inductor, and passives into a single low-profile module requiring as few as three external components.
Key Specifications
| Input Voltage | 3.0V to 14.5V |
| Output Voltage | 0.6V to 3.6V (adjustable) |
| Output Current | 20A max |
| Switching Frequency | 570kHz (selectable) |
| Efficiency | Up to 96% |
| Power Good Output | Yes |
| Features | OCP, OTP, UVLO, Remote On/Off |
| Package | 72-BQFN Module (15 x 16 x 5.8mm) |
| Operating Temperature | -40°C to +85°C |
Features
- Integrated power MOSFETs, shielded inductor, and passives
- Only 3 external components required
- Adjustable output: 0.6V to 3.6V
- Up to 96% efficiency
- Remote on/off control
- Power good indicator
- Overcurrent protection (OCP)
- Undervoltage lockout (UVLO)
- Selectable switching frequency
- Auto-skip Eco-mode or FCCM operation
- FPGA and processor power supplies
- Telecom and networking equipment
- Server and storage systems
- Industrial control power
- Test and measurement instruments
- FPGA core and I/O rail power (0.9V-3.3V at 20A)
- Telecom line card point-of-load DC-DC conversion
- Server CPU and memory rail power supplies
- Industrial PLC and motor controller power modules
- Test equipment high-current programmable rails
Applications
The LMZ31520RLG from Texas Instruments is an easy-to-use integrated power module combining a 20A DC/DC converter with power MOSFETs, a shielded inductor, and passives in a low-profile QFN package. Accepting 3.0V to 14.5V input and providing adjustable output from 0.6V to 3.6V at up to 20A, it requires as few as three external components. The module eliminates loop compensation and magnetics selection, featuring up to 96% efficiency with comprehensive protection including OCP, OTP, and UVLO.
The LMZ31520 uses a voltage-mode buck converter topology with integrated power MOSFETs and a shielded inductor. The control IC implements voltage-mode control with an internal compensator, eliminating the need for external loop compensation. The output voltage is set by an external resistor divider connected to the VADJ pin. The module includes a 5V LDO (V5V) for internal circuitry, selectable switching frequency, and configurable slow-start time. Auto-skip Eco-mode reduces switching losses at light loads, while FCCM mode maintains continuous conduction for lower output ripple.
| Pin | Name | Type | Function |
|---|---|---|---|
| 2 | VIN | Power | Input bias voltage |
| 3 | SS_SEL | Input | Slow-start select / FCCM-Eco mode |
| 8 | INH | Input | Enable/inhibit control |
| 10 | VOUT | Power | Output voltage (multiple pins) |
| 13 | VADJ | Input | Output voltage adjust |
| 14 | SENSE+ | Input | Remote sense connection |
| 15 | PVIN | Power | Power stage input voltage |
| 18 | PWRGD_PU | Output | Power good pull-up |
| 19 | PWRGD | Output | Power good indicator |
| 61 | V5V | Output | 5V internal regulator |
| Manufacturer | Part Number | Package | Notes |
|---|---|---|---|
| TI | LMZ31506RLGT | 72-BQFN | 6A version, smaller package |
| TI | LMZ31503RLGT | 56-BQFN | 3A version, compact form |
| TDK | FS1412-2000-R6 | BGA | 20A, 4.5-14V input module |
| Vicor | PI3525-00-LGIZ | BGA | 25A zero-voltage switched module |
| Murata | MY2SGA03020A1R0 | BGA | 20A, 4.5-14.5V input module |
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We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.
Service & Packaging
All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.
Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.