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Texas Instruments LM2716MTX/NOPB
- Part No.:
- LM2716MTX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2716MTX/NOPB.pdf
- Description:
- IC REG BUCK BST ADJ/4V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
LM2716MTX/NOPB from Texas Instruments is a dual PWM DC/DC converter integrating a fixed 3.3V/1.8A buck regulator and an adjustable boost regulator delivering up to 20V at 3.6A, both with integrated low-RDS(on) MOSFETs (0.16Ω and 0.12Ω), operating from 4V–20V input in a 24-lead TSSOP package for TFT-LCD bias and portable power rails.
For engineers reviewing the LM2716MTX/NOPB datasheet, LM2716MTX/NOPB pinout, LM2716MTX/NOPB application, or LM2716MTX/NOPB equivalent, key selection criteria include independent shutdown control (SHDN1/SHDN2), pin-adjustable 300–600kHz switching frequency via FSLCT, dual soft-start (SS1/SS2), and thermal/undervoltage protection - all critical for handheld and imaging power design.
Technical Context
The LM2716MTX/NOPB implements two independent current-mode PWM regulators: a fixed-output buck stage with 3.3V regulation and 1.8A current limit, and an adjustable boost stage supporting output voltages up to 20V with 3.6A current limit. Both use internal N-channel MOSFETs and share a common oscillator with frequency set by external resistor on FSLCT.
Each regulator features dedicated compensation pins (VC1/VC2), feedback inputs (FB1/FB2), soft-start terminals (SS1/SS2), and active-low shutdown controls (SHDN1/SHDN2). Protection includes thermal shutdown, input undervoltage lockout (UVP threshold 3.35–4.0V), and overvoltage detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 20V - supports single-cell Li-ion through multi-cell battery and industrial supply rails. |
| Buck Output | Fixed 3.3V ±2% - powers core logic, interface ICs, and display logic without external feedback resistors. |
| Boost Output Range | Adjustable up to 20V - set via FB2 resistor divider with 1.26V reference; enables TFT-LCD VPOS/VNEG generation. |
| Switch Current Limits | Buck: 1.8A; Boost: 3.6A - defines maximum load capability before cycle-by-cycle current limiting engages. |
| Switching Frequency | 300–600kHz (pin-selectable) - allows optimization of inductor size, efficiency, and EMI filtering. |
| RDS(on) (Buck/Boost) | 0.16Ω / 0.12Ω - minimizes conduction loss and thermal rise at full load, enabling high-efficiency operation. |
| Operating Temperature | −40°C to +125°C junction - suitable for automotive infotainment and industrial handheld environments. |
Pinout & Package
Package: 24-lead TSSOP (0.65mm pitch), RoHS-compliant, exposed pad not present. Thermal resistance θJA = 115°C/W (package only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 1,10,11,12) | Power ground return for switch nodes | Must be connected directly to AGND at device; handles high di/dt currents from SW1/SW2. |
| AGND (Pins 4,8,9) | Analog ground reference | Shared reference for bandgap, error amps, and feedback; requires low-impedance connection to PGND. |
| VIN (Pins 16,17,23) | Main power input | Supplies both regulators; must be decoupled with ≥47µF low-ESR capacitor near pins. |
| SW1 (Pin 24) | Buck high-side switch output | Connects to buck inductor; internal N-MOSFET source tied to PGND, drain to SW1. |
| SW2 (Pins 13,14,15) | Boost high-side switch output | Three parallel pins reduce resistance and inductance; connect directly to boost inductor. |
| FB1 (Pin 2) | Buck voltage feedback input | Monitors 3.3V output via internal 1.26V reference; no external divider needed for nominal operation. |
| FB2 (Pin 7) | Boost voltage feedback input | 1.26V reference node; output voltage set by RFB1/RFB2 divider per VOUT = 1.26 × (1 + RFB1/RFB2). |
| SHDN1/SHDN2 (Pins 21/18) | Independent enable/disable controls | Active-low; each shuts down its respective regulator, reducing quiescent current to 9µA total when both asserted. |
| SS1/SS2 (Pins 20/5) | Soft-start timing inputs | Capacitor-connected pins control startup ramp rate: TSS ≈ CSS × 0.6V / ISS (ISS1 = 6–12µA, ISS2 = 15–22µA). |
| FSLCT (Pin 19) | Frequency select input | Resistor-to-ground sets oscillator frequency: 47.5kΩ → 300kHz, 22.6kΩ → 600kHz. |
| VC1/VC2 (Pins 3/6) | Compensation network connections | Connect RC/CC networks to stabilize voltage loops; VC1 for buck, VC2 for boost (Gm = 1200/175 µmho). |
| VBG (Pin 4) | Bandgap reference output | Provides stable 1.26V reference for FB circuits; not intended for external loading. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent regulation | Simultaneous fixed 3.3V buck and programmable boost outputs eliminate need for separate converters in space-constrained designs. |
| Integrated low-RDS(on) switches | 0.16Ω buck and 0.12Ω boost MOSFETs reduce conduction loss and thermal stress, enabling >90% efficiency at mid-load across input range. |
| Pin-configurable switching frequency | Single resistor on FSLCT selects 300–600kHz, allowing trade-off between inductor size, efficiency, and EMI compliance without changing layout. |
| Dedicated soft-start and shutdown | SS1/SS2 and SHDN1/SHDN2 enable staggered power-up, sequencing, and dynamic power gating - essential for multi-rail systems. |
| Comprehensive protection suite | Thermal shutdown, input UVP (3.35–4.0V), and OVP prevent fault propagation during brown-out, overtemperature, or open-load conditions. |
Applications
| TFT-LCD Display Power | Handheld Imaging Devices |
|---|---|
Use Scenario: Generating positive and negative bias voltages (e.g., +15V, −10V) for TFT panel gate drivers and source drivers from a single 5V or 12V supply. IC Role / Device Role / Timing Role: Dual-regulator power management IC providing isolated, regulated rails with independent sequencing and soft-start. Use Value: Eliminates discrete boost/buck combinations; reduces BOM count by ≥4 components while maintaining <±2% output accuracy under dynamic load steps. | Use Scenario: Powering CCD/CMOS image sensor analog front-end (AFE), flash LED driver, and processor I/O rails in digital cameras or medical endoscopes. IC Role / Device Role / Timing Role: Primary DC/DC controller delivering 3.3V core logic power and adjustable high-voltage rail for sensor bias or flash charging. Use Value: Enables compact 2-layer PCB layout with shared input capacitance and thermal footprint; supports rapid load transients up to 1A/µs without output droop. |
| Cellular Phone Baseband | Portable Diagnostic Equipment |
Use Scenario: Supplying 3.3V RF transceiver core voltage and programmable 5–12V auxiliary rail for audio codec or SIM interface in legacy 2G/3G handsets. IC Role / Device Role / Timing Role: Dual-output PMIC managing primary and secondary power domains with independent enable control. Use Value: Reduces standby current to 9µA in shutdown mode; maintains fast wake-up (<100µs) due to internal bandgap and error amplifiers remaining biased. | Use Scenario: Providing stable 3.3V microcontroller supply and adjustable 8–18V excitation voltage for ultrasonic transducers or biosensor interfaces in battery-powered field instruments. IC Role / Device Role / Timing Role: High-reliability dual DC/DC converter with extended temperature support (−40°C to +125°C) and robust UVP/OVP protection. Use Value: Ensures uninterrupted operation during battery sag; maintains output regulation down to 4V input, extending usable battery life by ~12% versus 4.2V-cutoff alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-regulator DC/DC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65131RGTR | Fixed 3.3V buck + adjustable boost (up to 28V); higher boost current limit (4A); 20-pin QFN vs. 24-pin TSSOP. | Supports wider boost range and higher load current; lacks independent soft-start pins and has different compensation architecture. | Preferred for new designs requiring >20V boost or QFN thermal performance; not pin-compatible with LM2716MTX/NOPB. |
| MAX8647ETL+ | Fixed 3.3V buck + adjustable boost (up to 16.5V); lower max input (5.5V); integrated LDOs; 24-pin TQFN. | Optimized for USB-powered devices; unsuitable for >5.5V input or >16.5V boost; adds linear regulation not present in LM2716MTX/NOPB. | Only viable for low-input, low-boost applications; requires redesign of input filtering and feedback networks. |
Compared with TPS65131RGTR and MAX8647ETL+, the LM2716MTX/NOPB offers broader input range (4–20V), true independent shutdown/soft-start per channel, and proven reliability in industrial handhelds - making it optimal where input flexibility and control granularity outweigh newer package or feature advantages.
Availability
LM2716MTX/NOPB is available at Aetrix Electronics and suitable for TFT-LCD displays, handheld imaging devices, and portable diagnostic equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LM2716MTX/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 technologies with over 50 years of innovation in high-reliability power conversion ICs.
The LM2716MTX/NOPB belongs to TI's legacy high-efficiency dual DC/DC converter family, designed specifically for portable and display power applications demanding compact size, wide input range, and independent regulation control.
FAQ
What is the maximum boost output voltage supported by the LM2716MTX/NOPB?
The LM2716MTX/NOPB supports an adjustable boost output voltage up to 20V, set using an external resistor divider on FB2 with a precise 1.26V internal reference. This limit is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the SNVS240G datasheet, and operation beyond 20V risks violating the FB2 voltage rating (−0.3V to 7V) and SW2 absolute maximum (20V).
Does the LM2716MTX/NOPB require external compensation components for stable operation?
Yes, the LM2716MTX/NOPB requires external RC/CC networks on VC1 (buck) and VC2 (boost) pins for loop stability. The datasheet specifies recommended ranges: RC1 = 5–20kΩ, CC1 = 680pF–4.7nF for buck; RC2 and CC2 values depend on output capacitance and load, with design equations provided for pole-zero placement to ensure >45° phase margin.
Can the buck and boost sections of the LM2716MTX/NOPB operate simultaneously and independently?
Yes, the LM2716MTX/NOPB is explicitly designed for simultaneous, independent operation: each section has its own shutdown pin (SHDN1/SHDN2), soft-start pin (SS1/SS2), feedback input (FB1/FB2), and compensation node (VC1/VC2). The block diagram and Pin Descriptions confirm fully separate control paths, enabling staggered startup, dynamic power gating, and fault isolation.
What is the purpose of the multiple PGND and VIN pins on the LM2716MTX/NOPB?
The LM2716MTX/NOPB uses four PGND pins (1,10,11,12) and three VIN pins (16,17,23) to minimize parasitic inductance and resistance in high-current power paths. Multiple pins reduce voltage drop and thermal rise during peak switch currents (1.8A buck, 3.6A boost), improving efficiency and stability - a requirement emphasized in the Connection Diagram and Pin Descriptions.
How does the LM2716MTX/NOPB handle thermal overload conditions?
The LM2716MTX/NOPB incorporates dedicated thermal shutdown circuitry that disables both regulators when junction temperature exceeds 150°C (Absolute Maximum Rating). Recovery occurs automatically once die temperature falls below the hysteresis threshold (~140°C), as documented in the Protection section and Thermal Shutdown block of the SNVS240G datasheet.
LM2716MTX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 4V (3.3V)
- Voltage - Output (Max):
- 20V (Switch)
- Current - Output:
- 3.6A (Switch), 1.8A
- Frequency - Switching:
- 300kHz ~ 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
LM2716MTX/NOPB FAQ
1.How can I place an order for LM2716MTX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2716MTX/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 LM2716MTX/NOPB reliable?
The price and inventory of LM2716MTX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2716MTX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2716MTX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2716MTX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2716MTX/NOPB?
LM2716MTX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2716MTX/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 LM2716MTX/NOPB?
For technical support, including LM2716MTX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2716MTX/NOPB requirements.
6.How does Aetrix verify that LM2716MTX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2716MTX/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 LM2716MTX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2716MTX/NOPB?
All LM2716MTX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2716MTX/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 LM2716MTX/NOPB part is unused and in its original packaging.
Return procedure for LM2716MTX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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