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Texas Instruments LM2735XMYX/NOPB
- Part No.:
- LM2735XMYX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2735XMYX/NOPB.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,630
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Product details
Overview
LM2735XMYX/NOPB from Texas Instruments is a 1.6-MHz, 2.1-A low-side switch boost/SEPIC DC/DC regulator in a 6-pin WSON package, featuring ±2% feedback voltage accuracy, 170-mΩ NMOS switch, and 80-nA shutdown current. It delivers regulated output voltages from 3 V to 24 V across 2.7–5.5-V input, enabling compact LCD backlight and USB-powered device power supplies.
For engineers reviewing the LM2735XMYX/NOPB datasheet, LM2735XMYX/NOPB pinout, LM2735XMYX/NOPB application, or LM2735XMYX/NOPB equivalent, key selection criteria include switching frequency (1.6 MHz), peak switch current (2.1 A), feedback voltage (1.255 V), thermal shutdown threshold (160°C), and WSON-6 package compatibility with space-constrained portable designs.
Technical Context
The LM2735XMYX/NOPB implements constant-frequency peak current-mode control with internal compensation, eliminating external loop components. Its 1.6-MHz oscillator enables use of sub-2-mm SMD inductors and chip capacitors while maintaining up to 90% efficiency at 350 mA output.
It integrates soft-start (4-ms ramp), pulse-by-pulse current limiting (2.1-A min), undervoltage lockout (2.3-V rising threshold), and logic-high enable with 100-nA input bias. Thermal shutdown activates at 160°C with 10°C hysteresis, and PGND/AGND separation supports noise-sensitive feedback routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.6 MHz - Enables use of ≤2.2-µH inductors and 10-µF ceramic output capacitors for <100-mm² total solution size. |
| Peak Switch Current | 2.1 A - Supports ≥350-mA output at 12 V with 5-V input in boost configuration without external current sensing. |
| Feedback Voltage | 1.255 V ±2% - Sets output via resistor divider; tolerance directly impacts output regulation accuracy over temperature. |
| Shutdown Quiescent Current | 80 nA - Enables multi-year battery life in always-on portable devices with periodic wake-up cycles. |
| Internal NMOS RDS(on) | 170 mΩ - Limits conduction loss to <120 mW at 1-A load, reducing thermal stress in WSON-6 package. |
| Input Voltage Range | 2.7 V to 5.5 V - Matches single-cell Li-ion (3.0–4.2 V) and USB 2.0/3.0 (5.0 V ±5%) supply rails without pre-regulation. |
| Output Voltage Range | 3 V to 24 V - Configurable via FB resistor divider for white LED strings (12–24 V) or OLED bias (3–5 V). |
Pinout & Package
LM2735XMYX/NOPB uses a 3.00 mm × 3.00 mm, 6-pin WSON (NGG) package with exposed thermal pad (DAP) connected to PGND. The package supports high-power density layouts with 4–6 vias from DAP to inner-layer ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Supplies internal LDO and power stage; requires local 22-µF X5R ceramic capacitor placed within 3 mm of pin. |
| SW | Switch node | Drives external inductor and catch diode; high dv/dt node requiring minimized trace area and guard ring to PGND. |
| EN | Enable control | Logic-high active; must be tied to VIN or controlled MCU GPIO; floating or >VIN+0.3 V risks latch-up. |
| FB | Feedback input | Senses output voltage divider; bottom resistor must connect to AGND (pin 6), not PGND, for noise immunity. |
| PGND | Power ground | Return path for switch current; connects to DAP and output capacitor cathode; separate from AGND. |
| AGND | Analog ground | Reference for FB and error amplifier; routed separately from PGND and joined only at single point near C3. |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft start | 4-ms output voltage ramp prevents inrush current into large output capacitors during power-up. |
| Current-mode control | Enables stable operation with minimal external compensation-no Type II/III network required. |
| Ultra-low shutdown current | 80-nA quiescent draw allows integration into energy-harvesting or coin-cell-powered systems. |
| Thermal shutdown with hysteresis | 160°C trip / 150°C recovery prevents thermal cycling damage during sustained overload conditions. |
| Two fixed frequencies | 1.6-MHz option (LM2735-X) targets ultra-compact designs; 520-kHz (LM2735-Y) prioritizes efficiency at medium loads. |
Applications
| LCD Display Backlighting | OLED Panel Power Supply |
|---|---|
Use Scenario: Driving 4–6 white LEDs in series from a 3.7-V Li-ion battery in handheld medical monitors. IC Role / Device Role / Timing Role: Boost converter regulating 16-V output at 30-mA constant current using external current-sense resistor and FB divider. Use Value: 1.6-MHz operation allows 1.5-µH inductor and 10-µF output cap, reducing board area by 40% vs. 520-kHz alternatives. | Use Scenario: Generating 3.3-V and 12-V bias rails for AMOLED display driver ICs in smart wearables. IC Role / Device Role / Timing Role: Dual-rail SEPIC topology providing isolated, non-inverting outputs from single 3.3-V supply. Use Value: Internal compensation and 2.1-A switch support fast transient response (<10 µs) to pixel refresh load steps without output droop. |
| USB-Powered Devices | Digital Still Cameras |
Use Scenario: Powering 5-V microcontroller and 12-V autofocus motor from USB 2.0 port in portable barcode scanners. IC Role / Device Role / Timing Role: Boost regulator with EN pin synchronized to host USB enumeration to minimize standby drain. Use Value: 80-nA shutdown current extends battery backup runtime beyond 12 months when disconnected from host. | Use Scenario: Supplying 18-V flash LED driver and 3.3-V image sensor core from dual-cell alkaline pack (2.4–3.2 V). IC Role / Device Role / Timing Role: High-efficiency boost converter delivering 500-mA peak load with <100-mV line regulation. Use Value: ±2% VFB accuracy ensures consistent flash brightness across battery discharge curve without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost/SEPIC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2735YMF/NOPB | 520-kHz switching frequency; higher light-load efficiency but requires larger 4.7-µH inductor and 22-µF output capacitor. | Better suited for battery-powered devices where average efficiency >85% at 10–100-mA load dominates over PCB area. | Select LM2735YMF/NOPB when thermal derating or EMI constraints favor lower frequency over miniaturization. |
| TPS61040DRVR | Fixed 500-kHz frequency; 28-V max output; 1.1-A switch current; no internal soft-start; requires external compensation. | Used in industrial sensors needing 24-V rail from 3.3-V supply, but lacks integrated soft-start and thermal shutdown hysteresis. | Choose TPS61040DRVR only if output voltage >24 V is required and layout space permits larger magnetics. |
Compared with LM2735YMF/NOPB and TPS61040DRVR, LM2735XMYX/NOPB uniquely balances 1.6-MHz miniaturization, 2.1-A robustness, and full protection features-including soft-start and thermal hysteresis-in a 3×3-mm WSON package.
Availability
LM2735XMYX/NOPB is available at Aetrix Electronics and suitable for LCD backlighting, USB-powered peripherals, and digital camera power management requiring stable component supply, long-lifecycle availability, and TI-qualified production lots.
Supply support for LM2735XMYX/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 designing analog ICs, embedded processors, and wireless connectivity solutions for industrial, automotive, and personal electronics markets.
The LM2735 product line delivers space-efficient, easy-to-use DC/DC regulators targeting portable and battery-operated applications where board area, efficiency, and design simplicity are critical.
FAQ
What is the maximum output voltage supported by the LM2735XMYX/NOPB?
The LM2735XMYX/NOPB supports output voltages from 3 V to 24 V, set externally via the feedback resistor divider connected to the FB pin. The 24-V maximum is validated per absolute maximum ratings (SW pin voltage ≤26.5 V), and operation at 24 V requires careful thermal design due to increased power dissipation in the 170-mΩ internal switch.
Does the LM2735XMYX/NOPB require external compensation components?
No, the LM2735XMYX/NOPB features fully internal compensation optimized for typical boost configurations. External compensation is optional and only needed for specialized SEPIC topologies or extreme input/output ratios; the standard 12-V output from 5-V input design operates stably with zero external compensation components.
How does the enable pin (EN) function on the LM2735XMYX/NOPB?
The EN pin on the LM2735XMYX/NOPB is logic-high active: applying ≥1.8 V enables regulation, while ≤0.4 V places the device in shutdown mode with 80-nA quiescent current. The pin must never float or exceed VIN + 0.3 V to avoid damage; TI recommends direct connection to a microcontroller GPIO or pull-up to VIN through a 100-kΩ resistor.
What thermal performance can be expected from the LM2735XMYX/NOPB in its WSON package?
In the 3.00 mm × 3.00 mm WSON (NGG) package, the LM2735XMYX/NOPB has a junction-to-ambient thermal resistance (RθJA) of 54.9°C/W under JEDEC JESD51-7 4-layer board conditions. With proper DAP grounding via ≥4 vias to an inner ground plane, it sustains 1.2-W continuous power dissipation before reaching 125°C junction temperature at 25°C ambient.
Can the LM2735XMYX/NOPB be used in SEPIC topology, and what design considerations apply?
Yes, the LM2735XMYX/NOPB supports SEPIC operation per TI's application documentation. Key requirements include using coupled inductors or two matched discrete inductors, ensuring the FB divider references the final output (not intermediate node), and verifying stability with the internal compensation-TI provides WEBENCH® models confirming stable operation for 5-V-to-12-V SEPIC designs.
LM2735XMYX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 2.1A (Switch)
- Frequency - Switching:
- 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
LM2735XMYX/NOPB FAQ
1.How can I place an order for LM2735XMYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2735XMYX/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 LM2735XMYX/NOPB reliable?
The price and inventory of LM2735XMYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2735XMYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2735XMYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2735XMYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2735XMYX/NOPB?
LM2735XMYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2735XMYX/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 LM2735XMYX/NOPB?
For technical support, including LM2735XMYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2735XMYX/NOPB requirements.
6.How does Aetrix verify that LM2735XMYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2735XMYX/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 LM2735XMYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2735XMYX/NOPB?
All LM2735XMYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2735XMYX/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 LM2735XMYX/NOPB part is unused and in its original packaging.
Return procedure for LM2735XMYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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