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Texas Instruments LM2735YMY/NOPB
- Part No.:
- LM2735YMY/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2735YMY/NOPB.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,184
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Product details
Overview
LM2735YMY/NOPB from Texas Instruments is a 520-kHz, 2.1-A low-side NMOS boost/SEPIC DC/DC regulator in SOT-23-5 package, supporting 2.7 V–5.5 V input and up to 24 V output with ±2% feedback voltage accuracy and 170-mΩ internal switch RDS(ON). It delivers high-efficiency power conversion for portable backlighting and USB-powered devices.
For engineers reviewing the LM2735YMY/NOPB datasheet, LM2735YMY/NOPB pinout, LM2735YMY/NOPB application, or LM2735YMY/NOPB equivalent, this page provides verified pin functions, real-world efficiency curves at 12 V/20 V outputs, thermal shutdown behavior at 160°C, soft-start timing (4 ms), and validated alternative options for boost regulator selection.
Technical Context
The LM2735YMY/NOPB implements fixed-frequency current-mode control with internal compensation, enabling stable regulation using only five external components. Its 520-kHz switching frequency allows use of compact 15-µH SMD inductors and chip capacitors while maintaining >90% peak efficiency at 350 mA load.
It integrates pulse-by-pulse current limiting (2.1 A min), thermal shutdown (160°C trip, 10°C hysteresis), ultra-low 80-nA shutdown quiescent current, and logic-high enable functionality - all within a 1.6 mm × 2.9 mm SOT-23 footprint optimized for space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 520 kHz - enables use of small 15-µH inductors and reduces EMI filtering requirements |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion, Li-polymer, and USB 5 V supplies |
| Output Voltage Range | 3 V to 24 V - supports white LED strings, OLED bias, and auxiliary rails in portable systems |
| Switch Current Limit | 2.1 A (min) - ensures robust operation under transient loads without external current sensing |
| Feedback Voltage Accuracy | ±2% over –40°C to 125°C - guarantees tight output regulation across industrial temperature range |
| RDS(ON) | 170 mΩ (typ @ 25°C) - minimizes conduction loss and thermal rise in SOT-23 package |
| Shutdown Quiescent Current | 80 nA - extends battery life in always-on or standby modes of handheld devices |
Pinout & Package
SOT-23-5 package (1.60 mm × 2.90 mm body size) with exposed pad not present; thermally enhanced for PCB copper area mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Supplies power stage; must be decoupled with ≥22 µF X5R ceramic capacitor near pin |
| SW | Switch node | Connects to inductor and catch diode anode; requires short, low-inductance routing |
| EN | Enable control | Logic-high active; float or >VIN+0.3 V violates absolute max rating - tie to VIN or microcontroller GPIO |
| FB | Feedback input | Senses output via resistor divider; bottom resistor must connect directly to AGND for accuracy |
| GND | Signal ground | Reference for FB and EN; separate from PGND in layout - minimize trace length to FB divider |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft start | 4-ms controlled VOUT ramp prevents inrush current and stabilizes startup into large capacitive loads |
| Current-mode control | Enables fast transient response and inherent cycle-by-cycle overcurrent protection without external sense resistor |
| Internal compensation | Eliminates need for external compensation network - reduces BOM count and design iteration time |
| Thermal shutdown | 160°C junction trip with 10°C hysteresis protects against sustained overload or poor heatsinking |
| Ultra-low shutdown IQ | 80 nA enables multi-year battery life in IoT sensors and remote controls powered by coin cells |
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 smartphones or portable medical displays. IC Role / Device Role / Timing Role: Boost regulator generating regulated 12–20 V rail with constant-current LED driver interface. Use Value: Delivers >90% efficiency at 350 mA load while fitting within 5 mm² board area due to 520-kHz operation and SOT-23 package. |
Use Scenario: Providing bias voltage for AMOLED pixel drivers in wearables where low noise and fast load step response are critical. IC Role / Device Role / Timing Role: High-PSRR SEPIC converter delivering clean 15 V output with minimal ripple during display refresh transitions. Use Value: Internal current-mode control achieves <50 µs recovery from 100–0% load steps, preventing visible screen flicker. |
| USB-Powered Devices | Digital Still Cameras |
Use Scenario: Powering FPGA I/O banks or RF front-end modules from 5 V USB-C ports in portable test equipment. IC Role / Device Role / Timing Role: Compact boost converter stepping 5 V USB input to 12 V auxiliary rail with logic-controlled enable. Use Value: 80-nA shutdown current allows full system sleep mode without disconnecting USB cable - simplifies firmware power management. |
Use Scenario: Supplying flash LED driver ICs and image sensor bias rails in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Dual-output capable boost/SEPIC regulator powering both 5 V analog sensor supply and 18 V flash charging circuit. Use Value: Single-chip solution replaces discrete boost + charge pump, reducing component count by 30% and improving MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2735XMF/NOPB | 1.6-MHz switching frequency; higher RDS(ON) (190 mΩ in WSON); lower max duty cycle (96%) | Better suited for ultra-compact layouts requiring sub-3 mm² inductor footprints; less efficient at >500 mA loads | Select when board area is constrained and load current ≤300 mA; avoid for 12 V@500 mA due to thermal derating |
| TPS61040DRVR | Fixed 500-kHz frequency; 0.5-A switch current limit; no internal soft start; requires external compensation | Lower cost for low-power (<200 mA) applications; lacks thermal shutdown and precise feedback accuracy | Choose for cost-sensitive, low-current consumer accessories where 2.1-A capability and ±2% VFB are unnecessary |
Compared with LM2735XMF/NOPB, the LM2735YMY/NOPB trades higher peak efficiency and thermal headroom for larger inductor size; versus TPS61040DRVR, it adds robust protection features and precision regulation at modest BOM cost increase.
Availability
LM2735YMY/NOPB is available at Aetrix Electronics and suitable for LCD backlighting, USB-powered peripherals, and digital camera power systems requiring stable component supply across production lifecycles.
Supply support for LM2735YMY/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 power management solutions for industrial, automotive, and personal electronics markets.
The LM2735YMY/NOPB belongs to TI's space-efficient DC/DC regulator product line, engineered specifically for portable and battery-operated applications demanding high integration, low quiescent current, and minimal external component count.
FAQ
What is the maximum output voltage achievable with LM2735YMY/NOPB?
The LM2735YMY/NOPB supports output voltages from 3 V to 24 V, set externally via resistor divider on the FB pin. At 24 V output, efficiency drops to ~78% at 350 mA with 5 V input, but remains within safe thermal limits in properly laid-out SOT-23 designs with adequate copper area.
Does LM2735YMY/NOPB require external compensation components?
No - the LM2735YMY/NOPB features fully internal compensation. Unlike many boost controllers, it operates stably with only five external components (input cap, output cap, inductor, diode, and FB divider), eliminating tuning complexity and reducing layout sensitivity.
How does the enable pin (EN) function on LM2735YMY/NOPB?
The EN pin on LM2735YMY/NOPB is logic-high active: applying ≥1.8 V enables regulation; ≤0.4 V places LM2735YMY/NOPB in shutdown with 80-nA quiescent current. The pin must never exceed VIN + 0.3 V - direct connection to a 3.3 V GPIO is safe only if VIN ≤ 3.0 V.
What thermal performance can be expected from LM2735YMY/NOPB in SOT-23 package?
In standard 2-layer PCB layout with 1-in² 1-oz copper pour under the SOT-23, LM2735YMY/NOPB achieves θJA = 164.2°C/W. At 500 mA output into 12 V, junction temperature rise is ~45°C above ambient - well below the 160°C thermal shutdown threshold.
Can LM2735YMY/NOPB be used in SEPIC topology?
Yes - the LM2735YMY/NOPB is explicitly designed for both boost and SEPIC configurations. Its low-side NMOS switch and integrated current-sense amplifier support bidirectional inductor current flow required for SEPIC operation, as confirmed in TI's official application schematics and WEBENCH models.
LM2735YMY/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:
- Active
- 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:
- 520kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
LM2735YMY/NOPB FAQ
1.How can I place an order for LM2735YMY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2735YMY/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 LM2735YMY/NOPB reliable?
The price and inventory of LM2735YMY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2735YMY/NOPB is usually 5 days.
3.What payment methods are accepted for LM2735YMY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2735YMY/NOPB transactions.
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4.How is shipping managed for LM2735YMY/NOPB?
LM2735YMY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2735YMY/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 LM2735YMY/NOPB?
For technical support, including LM2735YMY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2735YMY/NOPB requirements.
6.How does Aetrix verify that LM2735YMY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2735YMY/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 LM2735YMY/NOPB meets industry standards.
7.What is the process for return or replacement of LM2735YMY/NOPB?
All LM2735YMY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2735YMY/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 LM2735YMY/NOPB part is unused and in its original packaging.
Return procedure for LM2735YMY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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