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Texas Instruments LM2733YMF/NOPB
- Part No.:
- LM2733YMF/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2733YMF/NOPB.pdf
- Description:
- IC REG BOOST ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2733YMF/NOPB from Texas Instruments is a 0.6-MHz fixed-frequency current-mode boost converter IC with integrated 40-V/1-A DMOS FET switch, 5-pin SOT-23 package, 2.7–14-V input range, and 1.23-V feedback reference-designed for compact high-voltage local boost regulation in portable power rails.
For engineers reviewing the LM2733YMF/NOPB datasheet, LM2733YMF/NOPB pinout, LM2733YMF/NOPB application, or LM2733YMF/NOPB equivalent, key selection criteria include switching frequency (600 kHz), internal FET RDS(ON) (650 mΩ max), shutdown current (<1 µA), duty cycle capability (96% max), and thermal performance (RθJA = 210°C/W) in space-constrained designs.
Technical Context
The LM2733YMF/NOPB implements peak-current-mode control with cycle-by-cycle current limiting and internal compensation. Its 0.6-MHz oscillator sets timing for PWM generation, while the FB pin regulates output via a resistive divider referenced to 1.23 V.
It features logic-level SHDN control with 0.5-V turn-off threshold and 1.5-V turn-on threshold, and integrates a 40-V DMOS FET capable of 1-A peak switch current at ≤50% duty cycle. Thermal shutdown protects against junction temperatures exceeding 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching frequency | 0.6 MHz (typical); enables use of smaller inductors (e.g., 10 µH) and ceramic capacitors vs. lower-frequency alternatives. |
| Input voltage range | 2.7 V to 14 V; supports single-cell Li-ion (3.0–4.2 V), dual-cell alkaline (2.7–3.6 V), and 5-V/12-V rail boosting. |
| FET RDS(ON) | 650 mΩ (max at 25°C); limits conduction loss at 330-mA typical output, enabling >85% efficiency at 5-VIN/12-VOUT. |
| Feedback reference | 1.23 V (±2.5% over −40°C to +125°C); sets regulated output voltage via external resistor divider (e.g., R1 = 117 kΩ, R2 = 13.3 kΩ for 12 V). |
| Shutdown current | <1 µA (max); extends battery life in standby mode for portable devices such as digital cameras and PDAs. |
| Max duty cycle | 96% (at 25°C); supports boost ratios up to ~15× (e.g., 2.7 V → 40 V), critical for white LED bias and high-side sensing rails. |
| Junction temperature | −40°C to +125°C; validated for industrial ambient operation with RθJA = 210°C/W in SOT-23 package. |
Pinout & Package
LM2733YMF/NOPB uses a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm with exposed pad for thermal relief. Pin 1 is SW (switch node), Pin 2 is GND (analog/power ground), Pin 3 is FB (feedback input), Pin 4 is SHDN (active-low enable), and Pin 5 is VIN (input supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Drain of internal DMOS FET | Connects to inductor and Schottky diode anode; handles 40-V transient voltage and 1-A peak current. |
| GND (Pin 2) | Analog and power ground | Common return for FB, SHDN, and VIN; requires low-impedance PCB connection to minimize noise coupling. |
| FB (Pin 3) | Feedback input | Senses output voltage via resistive divider; regulates output by comparing to 1.23-V internal reference. |
| SHDN (Pin 4) | Active-low shutdown control | Pull low (<0.5 V) to disable regulator; tie to VIN if unused; draws <2 µA when active. |
| VIN (Pin 5) | Power input | Supplies IC bias and switch gate drive; accepts 2.7–14 V; requires 2.2-µF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40-V/1-A DMOS FET | Eliminates external high-voltage switch; enables 16–40-V output from 2.7–14-V input without discrete FET layout complexity. |
| 0.6-MHz fixed switching frequency | Reduces inductor size (e.g., 10 µH vs. 47 µH at 100 kHz); improves transient response and simplifies EMI filtering. |
| Cycle-by-cycle current limiting | Protects against short-circuit and overload by terminating each switching pulse when peak current exceeds 1 A. |
| Internally compensated architecture | Requires only one external feedforward capacitor (Cf = 82 pF) for stability-no external compensation network needed. |
| Logic-level shutdown with <1 µA quiescent current | Enables deep-sleep modes in battery-powered systems; compatible with microcontroller GPIO without level-shifting. |
Applications
| White LED Backlighting | Digital Camera Power Rail |
|---|---|
|
Use Scenario: Driving 3–6串联 white LEDs (3.0–3.6 V each) from a 3.3-V or 5-V battery source in compact camera modules. IC Role / Device Role / Timing Role: Boost converter regulating constant current via FB-controlled voltage-to-current conversion; 0.6-MHz switching minimizes visible PWM flicker and EMI near image sensor. Use Value: Delivers 330-mA typical output at 12–20 V with >85% efficiency, eliminating need for external current-sense amplifier or high-side driver. |
Use Scenario: Generating 15-V or 20-V auxiliary rail for CCD/CMOS sensor bias, flash charging, or lens actuator drivers in handheld digital cameras. IC Role / Device Role / Timing Role: High-voltage local boost regulator with 96% max duty cycle; FB pin adjusts output precisely to match sensor vendor requirements. Use Value: Supports up to 40-V output using single-stage topology; 40-V FET withstands flyback transients during load dump or fast turn-off. |
| Portable Phone Display Supply | PDA System Voltage Booster |
|
Use Scenario: Providing 12–18-V backlight supply for OLED or TFT-LCD panels in smartphones and feature phones with tight board area constraints. IC Role / Device Role / Timing Role: Compact DC-DC booster operating from main 3.7-V Li-ion battery; SHDN pin synchronized to display on/off commands. Use Value: Achieves 330-mA output in <25-mm² footprint (SOT-23 + 10-µH inductor + 4.7-µF ceramic); shutdown current <1 µA preserves standby battery life. |
Use Scenario: Generating stable 12-V rail from 3.3-V or 5-V system bus to power legacy peripherals (e.g., CompactFlash, SD card interface, IRDA transceivers) in palm-top computers. IC Role / Device Role / Timing Role: Local boost regulator with internal compensation and wide input range; operates across full battery discharge curve (4.2 V → 2.7 V). Use Value: Maintains regulation down to 2.7-V input; 1.23-V FB reference ensures ±2.5% output accuracy over temperature without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2733XMF/NOPB | 1.6-MHz switching frequency; higher RDS(ON) (650 mΩ same), but tighter duty cycle tolerance (93% vs. 96%) and higher quiescent current (2.1 mA vs. 1.1 mA). | Better suited for ultra-compact layouts requiring smallest possible inductors; less optimal for high-duty-cycle (>85%) or low-IQ applications. | Select LM2733XMF/NOPB when board area is primary constraint and input-to-output ratio is moderate (e.g., 5 V → 12 V); prefer LM2733YMF/NOPB for 2.7 V → 20 V+ or battery-sensitive designs. |
| TPS61040DRVR | 600-kHz switching; 28-V FET (vs. 40-V); 0.5-A switch current limit (vs. 1-A); 1.25-V FB reference (vs. 1.23 V); RθJA = 220°C/W. | Limited to ≤28-V output; unsuitable for 30–40-V LED strings or high-voltage sensor bias; lower peak current restricts max load to ~170 mA at 20 V. | Choose TPS61040DRVR only when 40-V FET capability is unnecessary and cost is prioritized over output voltage headroom and current capability. |
Compared with LM2733XMF/NOPB and TPS61040DRVR, LM2733YMF/NOPB uniquely balances 0.6-MHz operation, 40-V/1-A FET robustness, and sub-1-µA shutdown-making it the optimal choice for high-ratio, battery-efficient boost where output exceeds 20 V or input dips below 3 V.
Availability
LM2733YMF/NOPB is available at Aetrix Electronics and suitable for portable medical monitors, handheld test equipment, and IoT edge sensors requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for LM2733YMF/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 LM2733YMF/NOPB belongs to TI's high-frequency boost converter product line, engineered specifically for space-constrained portable electronics needing reliable, integrated 40-V switching capability and minimal external component count.
FAQ
What is the maximum output voltage achievable with LM2733YMF/NOPB?
The LM2733YMF/NOPB supports up to 40 V output due to its 40-V rated internal DMOS FET and 96% maximum duty cycle. At 2.7-V input, this enables a theoretical boost ratio of ~14.8×. Real-world output is limited by external component ratings (e.g., diode PIV, capacitor WV), PCB layout parasitics, and thermal derating-verified up to 35 V in TI's typical application data.
Does LM2733YMF/NOPB require external compensation components?
No, LM2733YMF/NOPB uses internal compensation and only requires one external feedforward capacitor (Cf)-82 pF for the "Y" version-to stabilize the control loop. This eliminates the need for external RC networks or type-II/type-III compensators, reducing BOM count and design iteration time.
What is the recommended Schottky diode for LM2733YMF/NOPB in a 20-V output application?
For 20-V output, TI specifies the MBR0530 (30-V, 0.5-A Schottky) in the LM2733YMF/NOPB datasheet. Its 30-V PIV rating provides 10-V margin above the 20-V output, and its low forward voltage (~0.45 V) minimizes conduction loss-critical for maintaining >85% efficiency at 170-mA typical load.
How does the shutdown function operate on LM2733YMF/NOPB?
The SHDN pin on LM2733YMF/NOPB is active-low: pulling it below 0.5 V disables the regulator and reduces quiescent current to <1 µA; pulling it above 1.5 V enables normal operation. If unused, TI recommends tying SHDN directly to VIN-no pull-up resistor required-ensuring reliable startup and avoiding floating-input risk.
Can LM2733YMF/NOPB operate from a 2.7-V lithium coin cell?
Yes, LM2733YMF/NOPB is specified to operate down to 2.7 V input across −40°C to +125°C. At 2.7 V, it delivers ~110 mA at 30 V output (per TI's typical application table), making it viable for low-power coin-cell–powered sensors or memory backup circuits-provided thermal design accommodates reduced efficiency at low VIN.
LM2733YMF/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
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 14V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM2733YMF/NOPB FAQ
1.How can I place an order for LM2733YMF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2733YMF/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 LM2733YMF/NOPB reliable?
The price and inventory of LM2733YMF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2733YMF/NOPB is usually 5 days.
3.What payment methods are accepted for LM2733YMF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2733YMF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2733YMF/NOPB?
LM2733YMF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2733YMF/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 LM2733YMF/NOPB?
For technical support, including LM2733YMF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2733YMF/NOPB requirements.
6.How does Aetrix verify that LM2733YMF/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2733YMF/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 LM2733YMF/NOPB meets industry standards.
7.What is the process for return or replacement of LM2733YMF/NOPB?
All LM2733YMF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2733YMF/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 LM2733YMF/NOPB part is unused and in its original packaging.
Return procedure for LM2733YMF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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