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Texas Instruments LM2735YQMF/NOPB
- Part No.:
- LM2735YQMF/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2735YQMF/NOPB.pdf
- Description:
- IC REG BOOST FLYBACK ADJ SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,597
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Product details
Overview
LM2735YQMF/NOPB from Texas Instruments is a 520-kHz, 2.1-A low-side switch boost/SEPIC DC/DC regulator in SOT-23-5 package, supporting 2.7–5.5 V input and up to 24 V output, with ±2% feedback voltage accuracy and 80 nA shutdown current. It delivers regulated power for portable display backlighting, USB-powered devices, and white LED current sources.
For engineers reviewing the LM2735YQMF/NOPB datasheet, LM2735YQMF/NOPB pinout, LM2735YQMF/NOPB application, or LM2735YQMF/NOPB equivalent, key selection criteria include switching frequency (520 kHz), internal compensation, soft-start timing (4 ms), NMOS RDS(ON) (170 mΩ), and thermal shutdown at 160°C - all critical for space-constrained, battery-operated designs requiring fast transient response and minimal external components.
Technical Context
The LM2735YQMF/NOPB implements constant-frequency peak current-mode control with internal compensation, enabling stable regulation without external loop components. Its 520-kHz fixed switching frequency allows use of compact 15 µH inductors and chip capacitors while maintaining up to 90% efficiency at 12 V output.
It integrates pulse-by-pulse current limiting (2.1 A min), thermal shutdown (160°C trip, 10°C hysteresis), and logic-high enable with 0.4 V shutdown threshold. The feedback reference is trimmed to 1.255 V at 25°C with ±2% accuracy over –40°C to 125°C, supporting precise output voltage setting via resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 520 kHz - enables use of small surface-mount inductors (e.g., 15 µH) and reduces solution footprint vs lower-frequency regulators. |
| Max Switch Current | 2.1 A - supports high-output-power boost configurations (e.g., 12 V @ 350 mA from 5 V input) without external current sensing. |
| Feedback Voltage | 1.255 V ±2% - sets output voltage accuracy; used with external resistor divider to configure outputs from 3 V to 24 V. |
| RDS(ON) | 170 mΩ (TJ = 25°C) - minimizes conduction loss in the integrated NMOS switch, improving efficiency especially at medium loads. |
| Shutdown Current | 80 nA - extends battery life in always-on portable systems by reducing quiescent drain during inactive periods. |
| Soft-Start Time | 4 ms - controls output ramp rate to limit inrush current into output capacitance, preventing input supply sag or brownout. |
| UVLO Threshold | 2.3 V (rising), 1.9 V (falling) - ensures reliable startup and graceful shutdown across wide battery discharge curves (e.g., single Li-ion or 2-cell alkaline). |
Pinout & Package
LM2735YQMF/NOPB uses the SOT-23-5 (DBV) package: 1.60 mm × 2.90 mm, 5-pin, surface-mount, with exposed pad not connected (no thermal pad). Pin 1 = SW, Pin 2 = GND, Pin 3 = FB, Pin 4 = EN, Pin 5 = VIN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Supplies the power stage; must be decoupled with ≥22 µF ceramic capacitor close to pin and GND. |
| GND | Signal ground | Reference for FB and EN; place bottom feedback resistor adjacent to this pin to minimize noise coupling. |
| FB | Feedback input | Connects to resistor divider midpoint; regulates output by comparing to 1.255 V internal reference. |
| EN | Enable control | Logic-high (>1.8 V) enables operation; floating or >VIN + 0.3 V risks damage; 80 nA shutdown current achieved when pulled low. |
| SW | Switch node | Drives external inductor; connects to cathode of catch diode; requires short, low-inductance trace to minimize EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Internal compensation | Eliminates need for external compensation network - reduces BOM count and layout sensitivity in cost-sensitive portable designs. |
| Current-mode control | Provides inherent cycle-by-cycle current limiting and fast transient response without requiring external current-sense resistors. |
| Ultra-low shutdown current | 80 nA enables multi-year battery life in IoT sensors or remote controls where device spends >99% time in shutdown. |
| Integrated soft start | 4 ms controlled ramp prevents output overshoot and limits inrush into large output capacitors (e.g., 10 µF ceramic + bulk electrolytic). |
| Thermal shutdown with hysteresis | 160°C trip / 150°C recovery prevents latch-up during sustained overload or poor PCB thermal design. |
Applications
| Portable LCD Backlighting | OLED Panel Power Supply |
|---|---|
Use Scenario: Driving white LED strings in handheld medical monitors or industrial HMIs powered by single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Boost regulator generating stable 12–18 V from varying battery input to feed constant-current LED driver ICs. Use Value: 520-kHz switching enables <10 mm² total solution size including 15 µH inductor and 10 µF output capacitor - critical for thin bezel displays. | Use Scenario: Providing bias voltage for active-matrix OLED panels in wearables, where input is 3.3 V from PMIC and output required is 10–15 V. IC Role / Device Role / Timing Role: SEPIC-configured regulator delivering regulated output independent of input-to-output voltage relationship, avoiding dropout issues during battery sag. Use Value: Internal 2.1-A switch and 170-mΩ RDS(ON) sustain >85% efficiency at 100 mA load, minimizing heat in sealed enclosures. |
| USB-Powered Devices | Digital Camera Flash Charging |
Use Scenario: Powering 5 V logic and 12 V analog rails in USB-C peripheral dongles drawing ≤500 mA from host port. IC Role / Device Role / Timing Role: Boost converter stepping 5 V USB input to 12 V for op-amp supplies or sensor biasing, with EN pin synchronized to USB enumeration. Use Value: 80 nA shutdown current ensures zero standby drain when USB suspend mode is asserted - preserving host battery. | Use Scenario: Charging high-voltage capacitor (≥300 V) for xenon flash in compact digital still cameras using 3.7 V Li-ion battery. IC Role / Device Role / Timing Role: First-stage boost regulator generating 12–15 V intermediate rail to feed flyback or charge-pump flash charger ICs. Use Value: 520-kHz operation allows use of miniature 2.2 µH shielded inductors, reducing height and EMI in camera module stack-ups. |
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 quiescent current (7 mA vs 3.4 mA), same pinout and package. | Better suited for ultra-compact layouts needing smallest possible inductors (<4.7 µH); trades efficiency at light loads for reduced footprint. | Select LM2735XMF/NOPB when board area is constrained more than efficiency; LM2735YQMF/NOPB preferred for battery runtime-critical designs. |
| TPS61040DRVR | Fixed 600-kHz frequency, 28-V max output, 1.1-A switch, no internal soft start, requires external compensation. | Lacks integrated soft start and compensation; needs additional components but offers wider output voltage range and higher max VOUT. | Choose TPS61040DRVR only if >24 V output or tighter output voltage tolerance (<±1%) is required; otherwise LM2735YQMF/NOPB offers lower BOM count and faster design cycle. |
Compared with LM2735XMF/NOPB, LM2735YQMF/NOPB delivers superior light-load efficiency and longer battery life due to lower quiescent current (3.4 mA vs 7 mA), while compared with TPS61040DRVR it reduces design complexity through internal compensation and soft start - cutting bill-of-materials by ≥3 passive components and eliminating stability tuning effort.
Availability
LM2735YQMF/NOPB is available at Aetrix Electronics and suitable for portable display backlighting, USB-powered peripherals, and digital camera power management requiring stable component supply, long-term manufacturability, and automotive-grade reliability validation.
Supply support for LM2735YQMF/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 company headquartered in Dallas, Texas, designing and manufacturing analog, embedded processing, and power management ICs for industrial, automotive, and consumer markets.
The LM2735YQMF/NOPB belongs to TI's space-efficient DC/DC regulator product line, engineered specifically for portable electronics where minimal PCB area, low quiescent current, and ease of implementation are primary design constraints.
FAQ
What is the maximum output voltage achievable with LM2735YQMF/NOPB?
The LM2735YQMF/NOPB supports output voltages from 3 V to 24 V, set by an external resistor divider on the FB pin. The upper limit is constrained by the 26.5 V absolute maximum SW pin voltage rating and internal 170-mΩ NMOS switch breakdown margin. For 24 V output, ensure external diode and capacitor ratings exceed 25 V with derating.
Does LM2735YQMF/NOPB require external compensation components?
No, LM2735YQMF/NOPB features fully internal compensation optimized for standard boost configurations. No external compensation network is needed for typical applications - simplifying layout and reducing BOM count. Only the feedback divider, input/output capacitors, inductor, and catch diode are required.
What is the purpose of the AGND pin in LM2735YQMF/NOPB?
The LM2735YQMF/NOPB does not have an AGND pin - that designation applies to MSOP-PowerPAD and WSON variants. The SOT-23-5 package (LM2735YQMF/NOPB) uses a single GND pin (Pin 2) serving both signal and power ground functions. AGND appears only in 6-pin WSON and 8-pin MSOP packages per TI's official pinout documentation.
Can LM2735YQMF/NOPB operate in SEPIC topology?
Yes, LM2735YQMF/NOPB supports SEPIC configuration per TI's official application notes and typical circuits. Its low-side NMOS switch architecture and current-mode control allow stable operation in SEPIC mode, enabling output voltages both above and below input - useful for battery-powered systems with wide VIN ranges.
What is the thermal shutdown behavior of LM2735YQMF/NOPB?
LM2735YQMF/NOPB activates thermal shutdown at 160°C junction temperature, disabling the internal NMOS switch until junction temperature falls to ~150°C (10°C hysteresis). This protects against permanent damage during sustained overload or inadequate PCB copper pour, and recovery is automatic without external reset.
LM2735YQMF/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM2735YQMF/NOPB FAQ
1.How can I place an order for LM2735YQMF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2735YQMF/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 LM2735YQMF/NOPB reliable?
The price and inventory of LM2735YQMF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2735YQMF/NOPB is usually 5 days.
3.What payment methods are accepted for LM2735YQMF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2735YQMF/NOPB transactions.
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4.How is shipping managed for LM2735YQMF/NOPB?
LM2735YQMF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2735YQMF/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 LM2735YQMF/NOPB?
For technical support, including LM2735YQMF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2735YQMF/NOPB requirements.
6.How does Aetrix verify that LM2735YQMF/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2735YQMF/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 LM2735YQMF/NOPB meets industry standards.
7.What is the process for return or replacement of LM2735YQMF/NOPB?
All LM2735YQMF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2735YQMF/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 LM2735YQMF/NOPB part is unused and in its original packaging.
Return procedure for LM2735YQMF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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