My Inquiry
My Account
Texas Instruments LM20144QMHE/NOPB
- Part No.:
- LM20144QMHE/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM20144QMHE/NOPB.pdf
- Description:
- IC REG BUCK ADJ 4A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:250
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM20144QMHE/NOPB from Texas Instruments is a 4A synchronous buck regulator with peak current mode control, adjustable switching frequency (500 kHz–1.5 MHz), 0.8V adjustable output voltage, and integrated 32 mΩ high-side/36 mΩ low-side FETs. It delivers stable power to FPGA, DSP, and ASIC core rails from 2.95V–5.5V input sources.
For engineers reviewing the LM20144QMHE/NOPB datasheet, LM20144QMHE/NOPB pinout, LM20144QMHE/NOPB application, or LM20144QMHE/NOPB equivalent, key selection criteria include pre-biased start-up capability, precision enable with 66 mV hysteresis, PGOOD open-drain signaling, and thermal shutdown at 160°C - all validated for AEC-Q100 Grade 1 automotive operation.
Technical Context
The LM20144QMHE/NOPB implements peak current mode control with nonlinear parabolic slope compensation, enabling stable loop response across 0.8V–5.5V output range without external ramp injection. Its dual-function SS/TRK pin supports both programmable soft-start (via external capacitor) and output voltage tracking of higher-voltage rails.
Internal protection includes overvoltage protection (108% VFB threshold), UVLO (2.7V rising threshold with 45 mV hysteresis), cycle-by-cycle current limiting (6.0A typical), and thermal shutdown (160°C). The device operates in diode emulation mode below critical conduction boundary to improve light-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - supports FPGA core rail loads without external current sharing. |
| Input Voltage Range | 2.95V to 5.5V - compatible with 3.3V and 5V system buses. |
| Switching Frequency | 500 kHz to 1.5 MHz - adjustable via RT-to-ground resistor; enables compact magnetics design. |
| Feedback Reference | 0.8V ±1.5% - sets minimum output voltage; allows precise regulation down to 0.8V with RFB divider. |
| Current Limit Threshold | 6.0A typical - minimizes required inductor saturation current rating by >20% vs. typical 5A buck controllers. |
| Peak Efficiency | 97% - achieved at 1.2V/4A output with 5V input and 1MHz switching. |
| Thermal Shutdown | 160°C with 10°C hysteresis - prevents permanent damage during sustained overload or poor airflow. |
Pinout & Package
LM20144QMHE/NOPB uses a 16-pin HTSSOP package with exposed thermal pad (Package Number PWP0016A), optimized for PCB heat dissipation via soldered ground plane connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SS/TRK | Soft-Start / Tracking Control | 5 µA internal current source charges external capacitor for monotonic startup; <0.8V input enables voltage tracking of external rail. |
| 2 FB | Feedback Input | Connects to resistor divider; regulates output to 0.8V reference; 1 nA bias current minimizes divider error. |
| 3 PGOOD | Power Good Output | Open-drain signal asserts high when VOUT is within ±6% of target; 16 µs deglitch prevents false triggering. |
| 4 COMP | Compensation Node | External RC network sets loop crossover frequency and phase margin; supports ceramic, polymer, or electrolytic output caps. |
| 5 NC | No Connect | Internally unconnected; recommended to tie to AGND for noise immunity. |
| 6,7 PVIN | Power Switch Input | Dual pins reduce high-frequency input ripple; require local 22 µF X5R ceramic bypass near package. |
| 8,9 SW | Switch Node | Drives external inductor; high dv/dt requires tight layout to minimize EMI and ringing. |
| 10,11 PGND | Power Ground | Return path for high-current switch node; must be separated from AGND and connected at single point. |
| 12 EN | Enable Input | 1.18V turn-on threshold with 66 mV hysteresis; supports precise sequencing using resistor divider from PVIN. |
| 13 VCC | Internal Subregulator | 2.7V LDO output; bypassed with 1 µF ceramic capacitor to stabilize gate drive and bias circuitry. |
| 14 AVIN | Analog Supply Input | Bias supply for error amplifier and modulator; requires RC filter from PVIN to suppress switching noise. |
| 15 AGND | Analog Ground | Quiet reference for feedback and compensation circuits; isolated from PGND except at single star point. |
| 16 RT | Frequency Set | Resistor to ground sets oscillator frequency: 49.9 kΩ → 1.5 MHz, 249 kΩ → 500 kHz. |
| EP | Exposed Pad | Thermally connected to die substrate; must be soldered to PCB ground plane to achieve θJA = 38°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Pre-biased Start-Up | Enables safe startup into existing output voltage without sinking current - protects FPGA/ASIC I/O from reverse conduction through parasitic paths. |
| Nonlinear Slope Compensation | Parabolic ramp adapts to output voltage level, eliminating subharmonic oscillation across full 0.8V–5.5V range without manual tuning. |
| Diode Emulation Mode | Disables low-side FET at zero inductor current, preventing negative current and improving light-load efficiency below ~100 mA. |
| AEC-Q100 Grade 1 Qualified | Validated for −40°C to +125°C junction temperature operation - suitable for automotive infotainment and ADAS power rails. |
| Integrated OVP + UVLO + Thermal Shutdown | Single-chip fault coverage eliminates need for external supervisors; PGOOD provides system-level power sequencing coordination. |
Applications
| FPGA Core Power | DSP/ASIC Core Rail |
|---|---|
Use Scenario: Powers 1.2V core of Xilinx Artix-7 FPGA during configuration and active logic operation. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 4A with tight transient response and monotonic startup. Use Value: Pre-biased start-up avoids bus contention when multiple rails power up asynchronously; PGOOD enables configuration lockstep with FPGA DONE pin. |
Use Scenario: Supplies 1.0V core voltage to TI C66x DSP in wireless baseband processing unit. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with adjustable frequency to avoid sensitive IF bands. Use Value: 97% peak efficiency reduces thermal load in dense RF modules; SS/TRK pin tracks 1.8V I/O rail for controlled voltage ramp alignment. |
| Automotive Infotainment SoC | Optical Line Card Bias |
Use Scenario: Generates 1.1V core rail for NXP i.MX8QuadMax processor in head-unit display subsystem. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified buck regulator supporting ASIL-B functional safety requirements. Use Value: Integrated thermal shutdown and OVP meet automotive reliability standards; EN pin enables MCU-controlled power sequencing. |
Use Scenario: Provides 3.3V bias to laser driver ICs in 10Gbps SFP+ transceivers. IC Role / Device Role / Timing Role: Low-noise, high-PG accuracy regulator ensuring stable optical modulation depth. Use Value: 0.8V reference tolerance (±1.5%) and 6% PGOOD window guarantee consistent laser bias across temperature; HTSSOP exposed pad aids thermal management in sealed modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS544B25RVR | Higher 4.5A rating, 2.95V–18V input, integrated MOSFETs with lower RDS(on) (2.5 mΩ HS / 1.5 mΩ LS), but larger 20-pin VQFN package. | Supports wider input range and higher current; lacks pre-biased start-up and AEC-Q100 qualification. | Select when input exceeds 5.5V or >4A peak load is required; not drop-in due to different pinout and control architecture. |
| MP2315DJ-LF-Z | 4A rating, 4.5V–28V input, fixed 500 kHz frequency, no SS/TRK or PGOOD, smaller 8-pin SOIC package, no AEC-Q100 grade. | Cost-optimized for industrial non-automotive use; missing tracking, soft-start adjustability, and power-good signaling. | Choose for simple 5V-to-3.3V conversion where sequencing and diagnostics are not required; incompatible pinout and feature set. |
Compared with TPS544B25RVR and MP2315DJ-LF-Z, LM20144QMHE/NOPB uniquely combines AEC-Q100 Grade 1 qualification, pre-biased start-up, and dual-mode SS/TRK functionality in a thermally enhanced HTSSOP package - making it optimal for automotive and multi-rail embedded systems requiring robust sequencing and fault reporting.
Availability
LM20144QMHE/NOPB is available at Aetrix Electronics and suitable for FPGA power delivery, automotive infotainment SoC rails, and optical communications biasing requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for LM20144QMHE/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-reliability power conversion solutions.
LM20144QMHE/NOPB belongs to TI's PowerWise® synchronous buck regulator family, designed specifically for high-efficiency, low-voltage point-of-load applications in automotive, industrial, and communications infrastructure where thermal performance and sequencing control are critical.
FAQ
What is the maximum output current capability of the LM20144QMHE/NOPB?
The LM20144QMHE/NOPB delivers up to 4A of continuous output current under typical thermal conditions (θJA = 38°C/W, TA = 25°C). Its 6.0A typical current limit threshold and integrated 32 mΩ high-side/36 mΩ low-side FETs allow reliable operation into heavy transient loads without external current sensing. Derating applies above 85°C ambient or with reduced PCB copper area.
Does the LM20144QMHE/NOPB support startup into a pre-biased output voltage?
Yes, the LM20144QMHE/NOPB supports pre-biased start-up: during power-on, it will not sink current from an already charged output until the internal soft-start ramp exceeds the FB pin voltage. This prevents reverse current flow through load parasitics - a critical requirement for powering FPGAs and ASICs in multi-rail systems where sequencing is asynchronous.
How is the switching frequency set on the LM20144QMHE/NOPB?
The LM20144QMHE/NOPB switching frequency is set by connecting an external resistor between the RT pin and ground. A 49.9 kΩ resistor yields ~1.5 MHz, while 249 kΩ sets ~500 kHz. The relationship follows RT = 154750/fSW – 55 (kΩ, MHz). No external clock input is supported - frequency adjustment is resistor-based only.
What is the purpose of the SS/TRK pin on the LM20144QMHE/NOPB?
The SS/TRK pin on the LM20144QMHE/NOPB serves two distinct functions: (1) Soft-Start - an internal 5 µA current source charges an external capacitor to control output voltage ramp rate; (2) Tracking - when driven below 0.8V by an external source, it forces the LM20144QMHE/NOPB output to follow that reference, enabling coordinated power-up with higher-voltage rails.
Is the LM20144QMHE/NOPB qualified for automotive applications?
Yes, the LM20144QMHE/NOPB is explicitly qualified to AEC-Q100 Temperature Grade 1 (−40°C to +125°C junction), with built-in protections including thermal shutdown at 160°C, overvoltage protection at 108% VFB, and UVLO with hysteresis. Its HTSSOP package with exposed pad ensures robust thermal performance in automotive under-hood and cabin environments.
LM20144QMHE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- PowerWise®
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.95V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 4.68V
- Current - Output:
- 4A
- Frequency - Switching:
- 500kHz ~ 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
LM20144QMHE/NOPB FAQ
1.How can I place an order for LM20144QMHE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM20144QMHE/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM20144QMHE/NOPB reliable?
The price and inventory of LM20144QMHE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM20144QMHE/NOPB is usually 5 days.
3.What payment methods are accepted for LM20144QMHE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM20144QMHE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM20144QMHE/NOPB?
LM20144QMHE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM20144QMHE/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM20144QMHE/NOPB?
For technical support, including LM20144QMHE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM20144QMHE/NOPB requirements.
6.How does Aetrix verify that LM20144QMHE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM20144QMHE/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM20144QMHE/NOPB meets industry standards.
7.What is the process for return or replacement of LM20144QMHE/NOPB?
All LM20144QMHE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM20144QMHE/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM20144QMHE/NOPB part is unused and in its original packaging.
Return procedure for LM20144QMHE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM20144QMHE/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
