My Inquiry
My Account
Texas Instruments LM2717MTX/NOPB
- Part No.:
- LM2717MTX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2717MTX/NOPB.pdf
- Description:
- IC REG BUCK 3.3V DL 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2717MTX/NOPB from Texas Instruments is a dual synchronous step-down DC/DC converter IC integrating two independent buck regulators: one fixed 3.3V/2.2A output and one adjustable 1.267V–20V/3.2A output, operating from 4V–20V input with pin-selectable 300–600kHz switching frequency. It delivers high-efficiency power conversion for space-constrained portable electronics requiring dual-rail regulation.
For engineers reviewing the LM2717MTX/NOPB datasheet, LM2717MTX/NOPB pinout, LM2717MTX/NOPB application, or LM2717MTX/NOPB equivalent, key selection considerations include per-regulator shutdown control (SHDN1/SHDN2), independent soft-start (SS1/SS2), bootstrap capacitor support (CB1/CB2), thermal shutdown, and input undervoltage protection - all in a 24-pin TSSOP package.
Technical Context
The LM2717MTX/NOPB implements two current-mode PWM buck regulators sharing a common oscillator and voltage reference but featuring separate error amplifiers (gm1 = 1340 µmho, gm2 = 1360 µmho), compensation networks (VC1/VC2), feedback inputs (FB1/FB2), and power switches with matched 0.16Ω RDSON. Each regulator includes dedicated overtemperature shutdown, input undervoltage lockout (UVP threshold: 3.8V on, 3.3V off), and OVP circuitry.
Switching frequency is set via an external resistor on FSLCT (300–600kHz range), while soft-start timing is programmable per channel using external capacitors on SS1 and SS2 pins (ISS1 = ISS2 = 4–15 µA). The device uses separate AGND and PGND planes to isolate analog sensing from high-current switching paths, requiring direct tie-at-package connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 20V - supports wide-input industrial and battery-powered systems including 5V, 12V, and 19V rails. |
| Fixed Output Voltage | 3.3V ±0% - internally trimmed; no external feedback required for first channel. |
| Adjustable Output Range | 1.267V to 20V - set by resistor divider on FB2; 1.267V feedback reference enables low-VOUT designs. |
| Max Switch Current | 2.2A (CH1), 3.2A (CH2) - peak current limits defined at 0% duty cycle; enables compact inductor selection. |
| Internal Switch RDSON | 0.16Ω (both channels) - reduces conduction loss and improves full-load efficiency up to 95%. |
| Operating Frequency | 300kHz to 600kHz - externally resistor-programmable; balances size (smaller inductors/caps) vs. EMI. |
| Junction Temp Range | −40°C to +125°C - qualified for extended-temperature industrial and computing applications. |
Pinout & Package
LM2717MTX/NOPB is housed in a 24-lead TSSOP package (Package Code: PW0024A), 7.8mm × 4.4mm × 1.2mm profile, RoHS-compliant, lead finish: Sn, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,11,12,PGND | Power Ground | High-current return path for internal switches; must be tied directly to AGND at package. |
| 3,9,10,AGND | Analog Ground | Reference for FB/VC/SS pins; requires dedicated low-noise ground plane or direct tie to PGND at IC. |
| 4,FB1 | Fixed Buck Feedback Input | Monitors 3.3V output; internal 3.3V reference eliminates need for external divider on CH1. |
| 5,VC1 | Fixed Buck Compensation Node | Connects external RC network to stabilize voltage loop; typical transconductance 1340 µmho. |
| 7,VC2 | Adjustable Buck Compensation Node | Connects external RC network for CH2; transconductance 1360 µmho supports stable wide-VOUT range. |
| 8,FB2 | Adjustable Buck Feedback Input | Senses output via resistor divider; 1.267V reference enables precise VOUT ≥1.267V programming. |
| 13,SW2 | Adjustable Buck Switch Node | Connects to external inductor/diode; high-side switch node with 0.16Ω RDSON and 20V max rating. |
| 14,15,23,VIN | Input Power Supply | Common analog/digital supply rail; all VIN pins must be shorted together at package for low-impedance path. |
| 16,CB2 | Adjustable Buck Bootstrap Cap | Drives high-side MOSFET gate; requires ≥4.7nF ceramic cap (larger if VIN < 2×VOUT). |
| 17,SHDN2 | CH2 Shutdown Control | Active-low logic input; compatible with 1.8V+ logic; draws ≤5µA when asserted. |
| 18,SS2 | CH2 Soft-Start Timing | Charges external capacitor (ISS2 = 4–15µA); sets startup slew rate to limit inrush current. |
| 19,FSLCT | Frequency Select Input | Resistor-to-ground sets oscillator frequency between 300kHz and 600kHz (e.g., 46.4kΩ = 300kHz). |
| 20,SS1 | CH1 Soft-Start Timing | Independent soft-start for fixed 3.3V rail; same ISS1 current spec as SS2 (4–15µA). |
| 21,SHDN1 | CH1 Shutdown Control | Active-low enable for fixed buck; allows independent power sequencing of dual outputs. |
| 22,CB1 | Fixed Buck Bootstrap Cap | Same function as CB2; requires matching capacitor value for consistent gate drive performance. |
| 24,SW1 | Fixed Buck Switch Node | High-side switch node for 3.3V channel; shares same 0.16Ω RDSON and 20V rating as SW2. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck regulators | Enables simultaneous 3.3V and user-defined output (e.g., 5V, 12V, 15V) without external controllers or sequencing ICs. |
| Per-channel shutdown and soft-start | Supports flexible power sequencing, inrush limiting, and fault isolation - critical for multi-rail embedded systems. |
| Low 0.16Ω RDSON internal switches | Reduces conduction loss and thermal stress, enabling >90% efficiency across load range without external MOSFETs. |
| Separate AGND/PGND with mandatory tie-at-package | Minimizes noise coupling from switching currents into sensitive analog feedback paths, improving regulation accuracy. |
| Pin-selectable 300–600kHz switching frequency | Allows optimization of external component size (inductor/capacitor) versus EMI and efficiency trade-offs. |
Applications
| TFT-LCD Display Power | Laptop Mainboard Dual-Rail Supply |
|---|---|
|
Use Scenario: Powers gate driver (15–20V) and source driver (3.3V/5V) sections of TFT-LCD panels in portable monitors and tablets. IC Role / Device Role / Timing Role: Dual-output DC/DC converter providing isolated, regulated rails with independent enable control for display subsystem power management. Use Value: Eliminates need for discrete buck converters or inefficient LDOs; 95% peak efficiency extends battery life and reduces thermal load on thin form factors. |
Use Scenario: Generates core 3.3V I/O rail and configurable 5V/12V system rail on laptop mainboards with dynamic load profiles. IC Role / Device Role / Timing Role: Primary dual-buck power controller managing CPU peripheral voltage domains and USB/PCIe interface supplies. Use Value: Independent shutdown pins allow OS-controlled rail disabling during sleep states; soft-start prevents brownout during wake-up transitions. |
| Handheld Medical Device | Industrial Portable Data Terminal |
|
Use Scenario: Supplies 3.3V microcontroller core and 12V analog front-end (AFE) in battery-operated ultrasound or glucose meters. IC Role / Device Role / Timing Role: Integrated dual-buck regulator delivering precision rails under variable battery input (7–18V) with thermal safety margin. Use Value: Built-in thermal shutdown and UVP protect against battery depletion or overheating; 125°C junction rating supports sealed enclosures. |
Use Scenario: Powers 3.3V logic and 5V scanner/imager modules in ruggedized warehouse handhelds operating from 12V SLA batteries. IC Role / Device Role / Timing Role: High-reliability dual DC/DC converter supporting hot-swap input and transient-heavy loads from barcode scanners. Use Value: 20V absolute max input withstands load-dump transients; 0.16Ω RDSON sustains 3.2A peak loads during imaging bursts without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270RGET | Higher 3.6A/4.5A current capability; integrated LDOs; 2.95–18V input; fixed 3.3V + adjustable 0.6–5.5V outputs. | Targets higher-current, lower-VOUT applications (e.g., FPGA core rails); lacks 20V input tolerance and 15V+ adjustable range. | Select TPS65270RGET when needing >3.2A per rail or integrated LDOs; avoid if 20V input or >12V adjustable output is required. |
| ISL95210IRZ | Single-chip dual-phase buck with digital interface (SVID); 0.3–1.5V output; 3–24V input; no fixed 3.3V option. | Designed for CPU VRM applications with dynamic voltage scaling; not suitable for standalone 3.3V + high-VOUT generation. | Select ISL95210IRZ only for Intel-compatible processor power delivery; LM2717MTX/NOPB remains preferred for general-purpose dual-rail systems. |
Compared with TPS65270RGET and ISL95210IRZ, LM2717MTX/NOPB uniquely combines a factory-trimmed 3.3V rail, 20V input tolerance, and 1.267–20V adjustable range in a cost-optimized analog-control TSSOP package - making it optimal for non-processor, mid-power dual-rail applications where simplicity and wide output flexibility are prioritized over digital control or ultra-high current.
Availability
LM2717MTX/NOPB is available at Aetrix Electronics and suitable for TFT-LCD displays, handheld medical devices, and industrial portable data terminals requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for LM2717MTX/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 decades of expertise in high-efficiency DC/DC conversion.
The LM2717MTX/NOPB belongs to TI's legacy power management portfolio designed for cost-sensitive, space-constrained portable and industrial applications requiring dual-output buck regulation without digital complexity.
FAQ
What is the maximum input voltage rating for LM2717MTX/NOPB?
The LM2717MTX/NOPB has an absolute maximum input voltage rating of 22V, with recommended operating range of 4V to 20V. Exceeding 20V may trigger internal overvoltage protection or degrade reliability. The device maintains stable regulation across this full range, supporting 12V and 19V nominal inputs common in laptops and industrial equipment. Always observe derating guidelines per TI's thermal design recommendations when operating near 20V.
Does LM2717MTX/NOPB require external bootstrap capacitors?
Yes, LM2717MTX/NOPB requires two external ceramic bootstrap capacitors: CB1 for the fixed 3.3V buck channel and CB2 for the adjustable buck channel. TI recommends ≥4.7nF for standard operation; larger values (0.1µF–1µF) are advised when input voltage is less than twice the output voltage to ensure robust gate drive and maintain low RDSON. These capacitors must be placed close to their respective CB pins and VIN to minimize parasitic inductance.
Can LM2717MTX/NOPB generate a 15V output?
Yes, LM2717MTX/NOPB can generate a 15V output using its adjustable buck channel (CH2). With FB2's 1.267V reference, a resistor divider (e.g., RFB1 = 221kΩ, RFB2 = 20kΩ) sets VOUT = 1.267V × (1 + RFB1/RFB2) ≈ 15V. The device supports outputs up to 20V, provided input voltage exceeds output by sufficient margin for dropout and efficiency - e.g., ≥17V input for reliable 15V/3.2A operation.
How does the shutdown functionality work on LM2717MTX/NOPB?
LM2717MTX/NOPB provides independent active-low shutdown control: SHDN1 disables the fixed 3.3V buck, SHDN2 disables the adjustable buck. Both pins accept 1.8V+ logic signals and draw ≤5µA when asserted. Leaving either pin open enables its respective channel. TI specifies threshold voltages (e.g., SHDN2 output low <0.7V) to ensure compatibility with standard GPIOs. This enables precise power sequencing and rail isolation in multi-voltage systems.
What package type and moisture sensitivity level does LM2717MTX/NOPB use?
LM2717MTX/NOPB is packaged in a 24-lead TSSOP (PW0024A), measuring 7.8mm × 4.4mm × 1.2mm, with Sn lead finish and RoHS compliance. Its moisture sensitivity level is MSL Level-1 (unlimited floor life at ≤30°C/60% RH), rated for peak reflow of 260°C. The tape-and-reel format holds 2500 units per reel (reel width 16.4mm, diameter 330mm), optimized for automated SMT assembly.
LM2717MTX/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:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2.2A, 3.2A
- 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
LM2717MTX/NOPB FAQ
1.How can I place an order for LM2717MTX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2717MTX/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 LM2717MTX/NOPB reliable?
The price and inventory of LM2717MTX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2717MTX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2717MTX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2717MTX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2717MTX/NOPB?
LM2717MTX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2717MTX/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 LM2717MTX/NOPB?
For technical support, including LM2717MTX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2717MTX/NOPB requirements.
6.How does Aetrix verify that LM2717MTX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2717MTX/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 LM2717MTX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2717MTX/NOPB?
All LM2717MTX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2717MTX/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 LM2717MTX/NOPB part is unused and in its original packaging.
Return procedure for LM2717MTX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2717MTX/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…
