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Texas Instruments LM2733YMF/S7002529
- Part No.:
- LM2733YMF/S7002529
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2733YMF/S7002529.pdf
- Description:
- IC REG BOOST ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,802
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Product details
Overview
LM2733YMF/S7002529 from Texas Instruments is a 0.6-MHz fixed-frequency current-mode boost converter IC with integrated 40-V/1-A DMOS FET switch, 1.23-V feedback reference, and logic-level shutdown control - designed for compact, high-efficiency local boost regulation in space-constrained portable systems delivering up to 330 mA at 12 V from 5-V input.
For engineers reviewing the LM2733YMF/S7002529 datasheet, LM2733YMF/S7002529 pinout, LM2733YMF/S7002529 application, or LM2733YMF/S7002529 equivalent, key selection considerations include switching frequency (600 kHz), internal FET RDS(ON) (650 mΩ max), input voltage range (2.7–14 V), shutdown current (<1 µA), and SOT-23-5 package compatibility with minimal external components.
Technical Context
The LM2733YMF/S7002529 implements peak-current-mode control with cycle-by-cycle current limiting and internal compensation, enabling stable operation without external loop compensation components. Its 0.6-MHz switching frequency balances efficiency and component size, supporting ceramic output capacitors as small as 4.7 µF and inductors down to 10 µH.
It features a dedicated SW pin for high-side switch node connection, FB pin referenced to 1.23 V ±25 mV over temperature, and SHDN pin with 0.5 V turn-off threshold and 1.5 V turn-on threshold - all operating across −40°C to +125°C junction temperature range with thermal shutdown protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching frequency | 0.6 MHz (Y version); enables smaller magnetics than 1.6-MHz X variant while maintaining >85% efficiency at 330 mA load. |
| Input voltage range | 2.7 V to 14 V; supports single-cell Li-ion (3.0–4.2 V), 3.3-V/5-V rails, and automotive 12-V battery inputs with dropout margin. |
| Feedback reference voltage | 1.230 V (±25 mV over −40°C to +125°C); sets output via resistive divider; enables precise 12-V, 15-V, or 20-V boost configurations. |
| Internal FET RDS(ON) | 650 mΩ max at TJ = 25°C; limits conduction loss at 330 mA output, supporting >90% peak efficiency in typical 5-V-to-12-V designs. |
| Shutdown current | <1 µA typical; extends battery life in standby mode; SHDN pin requires pull-up to VIN if unused. |
| Switch current limit | 1 A minimum (duty cycle ≤50%); provides robust short-circuit and overload protection without external sensing. |
| Thermal resistance θJA | 210°C/W (SOT-23-5); requires PCB copper area for thermal relief above ~200 mA continuous load in ambient >60°C. |
Pinout & Package
LM2733YMF/S7002529 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, with exposed pad not electrically connected. The package supports reflow soldering per JEDEC J-STD-020 and is rated for 125°C maximum junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node output | Drain of internal 40-V DMOS FET; connects to inductor and Schottky diode anode; carries high dv/dt switching waveform. |
| GND (Pin 2) | Power and analog ground | Common return for input capacitor, feedback divider, and IC substrate; must be low-impedance path to minimize noise coupling. |
| FB (Pin 3) | Feedback input | Senses output voltage via resistive divider; regulates output by maintaining 1.23 V at this pin; bias current 60 nA max. |
| SHDN (Pin 4) | Enable/disable control | Logic-level input: <0.5 V disables regulator (quiescent current <1 µA); >1.5 V enables operation; requires pull-up if unused. |
| VIN (Pin 5) | Power input | Supplies IC bias and gate drive; accepts 2.7–14 V; requires local 2.2-µF ceramic capacitor placed within 3 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40-V/1-A DMOS FET | Enables boost outputs ≥16 V without external switch; eliminates gate driver and layout complexity. |
| 0.6-MHz fixed switching frequency | Reduces EMI compared to 1.6-MHz variant while allowing use of cost-effective 10-µH inductors and 4.7-µF ceramic output caps. |
| Cycle-by-cycle current limiting | Provides immediate overcurrent protection without external sense resistor; maintains stability under transient load steps. |
| Internally compensated architecture | Eliminates need for external compensation network; reduces BOM count and design iteration time for standard boost topologies. |
| Logic-level shutdown with <1 µA IQ | Supports ultra-low-power sleep modes in battery-powered devices; compatible with 1.8-V and 3.3-V microcontroller GPIOs. |
Applications
| White LED Backlighting | Digital Camera Power |
|---|---|
|
Use Scenario: Driving 3–6 white LEDs in series from a 3.3-V or 5-V supply in compact handheld cameras. IC Role / Device Role: Constant-current boost controller regulating LED string voltage (9–18 V) using FB pin feedback and current-sense resistor. Use Value: Delivers stable 330 mA at 12 V with >88% efficiency; 0.6-MHz operation minimizes audible coil whine and EMI near image sensors. |
Use Scenario: Generating 12-V flash capacitor charging rail from a 5-V USB or battery source in DSLR and mirrorless camera modules. IC Role / Device Role: High-voltage boost converter supplying fast-charging current to electrolytic flash capacitor bank. Use Value: 40-V internal FET withstands 15-V output transients; 1-A switch current supports rapid 100-ms flash recharge cycles. |
| Portable Audio DAC Supply | Industrial Sensor Signal Chain |
|
Use Scenario: Providing clean, low-noise 12-V bias for high-resolution audio DACs and op-amps in Bluetooth headphones and portable DAC/amps. IC Role / Device Role: Local boost regulator with feedforward capacitor (Cf = 82 pF) for enhanced PSRR and reduced output ripple. Use Value: Achieves <15 mVPP output ripple at 330 mA; internal compensation avoids instability from ceramic cap ESR zero. |
Use Scenario: Generating isolated 15-V or 20-V supply for precision analog front-ends (e.g., strain gauge amplifiers, RTD interfaces) in industrial IoT nodes. IC Role / Device Role: Compact, thermally robust boost stage powering instrumentation-grade op-amps and ADC references. Use Value: Operates continuously at −40°C to +105°C ambient; 1.23-V FB reference drift <±25 mV ensures <0.5% output voltage error over full range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2733XMF | 1.6-MHz switching frequency; 500 mΩ max RDS(ON); higher switching losses reduce efficiency at >200 mA loads. | Better suited for ultra-compact layouts requiring <4.7-µH inductors; less optimal for noise-sensitive audio or imaging circuits. | Select LM2733XMF only when board area is constrained and EMI filtering is implemented; LM2733YMF/S7002529 preferred for efficiency and thermal performance. |
| TPS61040DRVR | Fixed 600-kHz frequency; 17-V FET; 0.5-A switch current limit; requires external compensation; 6-pin WSON package. | Limited to ≤15-V output; lower current capability reduces max load to ~170 mA at 12 V; no internal 1.23-V reference. | Choose TPS61040DRVR only for cost-sensitive, lower-power applications where 330-mA capability and 40-V headroom are unnecessary. |
Compared with LM2733XMF and TPS61040DRVR, LM2733YMF/S7002529 delivers superior power density at mid-load currents, broader output voltage range (up to 40 V), and simpler implementation due to internal compensation and precise 1.23-V reference - making it optimal for portable and industrial boost applications demanding reliability and design simplicity.
Availability
LM2733YMF/S7002529 is available at Aetrix Electronics and suitable for portable medical monitors, industrial sensor nodes, digital camera modules, and battery-powered test equipment requiring stable component supply and long-term manufacturability.
Supply support for LM2733YMF/S7002529 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-reliability power conversion ICs.
The LM2733 product line was engineered for space-constrained portable electronics requiring efficient, integrated boost conversion - emphasizing minimal external components, wide input range, and robust thermal performance in SOT-23 packaging.
FAQ
What is the maximum output voltage achievable with LM2733YMF/S7002529?
The LM2733YMF/S7002529 supports output voltages up to 40 V, limited by its 40-V internal DMOS FET breakdown rating and duty cycle constraints. At 0.6-MHz operation, practical outputs of 12 V, 15 V, 20 V, 25 V, 30 V, and 35 V are validated in TI's typical characteristics curves - with 40-V operation confirmed in Figure 23 of the datasheet under VOUT = 40 V conditions.
Does LM2733YMF/S7002529 require an external compensation network?
No, LM2733YMF/S7002529 uses internally compensated architecture, eliminating the need for external Type-II or Type-III compensation networks. However, the feedforward capacitor Cf (82 pF for Y version) is mandatory for loop stability and must be placed between FB and GND as shown in the typical application circuit - omitting it causes oscillation.
What is the recommended Schottky diode for LM2733YMF/S7002529 in a 12-V output design?
For LM2733YMF/S7002529 configured for 12-V output, TI specifies the MBR0520 (20-V, 0.5-A Schottky) in Table 1 of the datasheet. Its low forward voltage (~0.35 V at 330 mA) minimizes conduction loss, and its 20-V rating provides sufficient margin above the 12-V output plus diode drop and transient spikes.
Can LM2733YMF/S7002529 operate from a 2.7-V input to generate 5-V output?
Yes, LM2733YMF/S7002529 supports input voltages as low as 2.7 V and can generate 5-V output with high efficiency. At 2.7-V input and 5-V/330-mA output, typical efficiency exceeds 85% (per Figure 18), and the device maintains regulation across −40°C to +125°C junction temperature with proper thermal layout.
How does the shutdown pin (SHDN) function on LM2733YMF/S7002529?
The SHDN pin on LM2733YMF/S7002529 is a logic-level enable input: pulling it below 0.5 V disables the regulator (reducing quiescent current to <1 µA), while driving it above 1.5 V enables operation. If unused, TI mandates connecting SHDN directly to VIN - leaving it floating risks erratic behavior or unintended shutdown.
LM2733YMF/S7002529 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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):
- 3V
- Voltage - Output (Max):
- 40V
- 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/S7002529 FAQ
1.How can I place an order for LM2733YMF/S7002529 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2733YMF/S7002529 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/S7002529 reliable?
The price and inventory of LM2733YMF/S7002529 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2733YMF/S7002529 is usually 5 days.
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LM2733YMF/S7002529 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2733YMF/S7002529 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/S7002529?
For technical support, including LM2733YMF/S7002529 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2733YMF/S7002529 requirements.
6.How does Aetrix verify that LM2733YMF/S7002529 is sourced from the original manufacturer or authorized distributors?
All LM2733YMF/S7002529 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/S7002529 meets industry standards.
7.What is the process for return or replacement of LM2733YMF/S7002529?
All LM2733YMF/S7002529 units undergo pre-shipment inspection (PSI). If there is an issue with LM2733YMF/S7002529, 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/S7002529 part is unused and in its original packaging.
Return procedure for LM2733YMF/S7002529:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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