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Texas Instruments LM2753SD
- Part No.:
- LM2753SD
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM2753SD.pdf
- Description:
- IC LED DRV RGLTR PWM 400MA 10SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,771
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Product details
Overview
LM2753SD from Texas Instruments is a high-power switched-capacitor voltage converter and flash LED driver IC. It delivers regulated 5 V output (VOUT) across 3 V–5.5 V input, supports 200 mA continuous load current and 400 mA pulsed flash current, and features <10 ns IOUT turnon time for camera flash control in mobile imaging systems.
For engineers reviewing the LM2753SD datasheet, LM2753SD pinout, LM2753SD application, or LM2753SD equivalent, key selection criteria include its PFM-regulated charge-pump architecture, 10-pin WSON package with integrated FET for flash switching, low 60 µA quiescent current, and dual-mode operation (torch/flash) enabled by independent EN and FLASH logic inputs.
Technical Context
The LM2753SD implements a multi-level switch array within its 2× charge pump to maintain regulation across 3 V–5.5 V input while dynamically adjusting ON-resistance to suppress ripple at high VIN. Its pulse-frequency modulation (PFM) control enables ultra-low 60 µA quiescent current under no-load conditions and automatic gain-1 fallback when VOUT drops below VIN-limiting input current to ~300 mA during heavy flash loads.
It integrates a 5-V LDO-like regulated output (VOUT) for general-purpose supply and a dedicated fast-switching IOUT pin controlled by an internal FET with 10 ns turnon time. The device uses only three external ceramic capacitors (CIN, COUT, C1), eliminating inductors and simplifying layout for space-constrained camera modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 5.5 V - matches Li-ion battery discharge profile without external regulation |
| Regulated Output Voltage | 5 V ±5% - stable rail for white flash LEDs requiring fixed forward voltage bias |
| Continuous Output Current | 200 mA - sufficient for torch-mode illumination or auxiliary 5-V loads |
| Pulsed Flash Current | 400 mA (≤500 ms) - enables high-intensity still-image capture with minimal thermal stress |
| Quiescent Current | 60 µA (typical) - extends standby battery life in always-on camera subsystems |
| Shutdown Current | 0.1 µA - near-zero power drain when disabled via EN pin |
| Switching Frequency | 725 kHz (typical) - balances EMI, capacitor size, and efficiency in compact layouts |
Pinout & Package
LM2753SD is housed in a 3.00 mm × 3.00 mm × 0.8 mm, 10-pin WSON package (no pullback) with exposed die-attach pad connected to GND for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1+) | Flying capacitor terminal | Connects to positive side of 1 µF flying capacitor (C1); forms charge-transfer path in doubler stage |
| 2 (VIN) | Main power input | Accepts 3–5.5 V battery input; powers internal circuitry and charge pump |
| 3 (C1−) | Flying capacitor terminal | Connects to negative side of C1; completes flying capacitor loop for voltage doubling |
| 4 (FLASH) | Digital flash enable input | Active-HIGH logic control (1.2–VIN V) for IOUT FET; internal 300 kΩ pulldown ensures safe default OFF state |
| 5, 7, 10 (GND) | Ground reference | Three dedicated GND pins minimize ground bounce and improve thermal conduction via exposed pad |
| 6 (EN) | Global enable input | Active-HIGH logic control (1.2–VIN V) for full device shutdown; internal 300 kΩ pulldown prevents floating start-up |
| 8 (IOUT) | Flash LED output | Switched 5-V output node; connects directly to LED cathode via ballast resistor; <10 ns turnon enables precise flash timing |
| 9 (VOUT) | Regulated 5-V output | Stable supply rail for torch-mode LED drive or other 5-V peripherals; supports up to 200 mA continuous load |
Key Features
| Feature | Design Value |
|---|---|
| Inductor-less 2× charge pump | Eliminates magnetic components and associated EMI; reduces BOM count to only three MLCCs (CIN, COUT, C1) |
| Dual-mode LED control | Independent EN (system enable) and FLASH (flash trigger) pins allow simultaneous torch dimming (via EN PWM) and flash strobing (via FLASH PWM) |
| Multi-level switch array | Automatically adjusts internal switch parallel count vs. VIN to optimize ripple suppression at high input and current delivery at low input |
| Thermal protection | Shuts down at ~140°C junction temperature and auto-recovers below ~125°C-prevents damage during sustained flash bursts |
| Soft-start ramp | VOUT rises from 0 V to 5 V in 640 µs typical-prevents inrush current and system voltage sag during power-up |
Applications
| Cell-Phone Camera Flash | Digital Still Camera Module |
|---|---|
Use Scenario: High-intensity, short-duration illumination for smartphone rear/front cameras during still capture. IC Role / Device Role / Timing Role: Flash LED driver with sub-10 ns IOUT turnon and 400 mA pulsed current capability; synchronized to image sensor exposure timing. Use Value: Enables consistent flash brightness across battery voltage range (3.0–4.2 V) without external DC/DC converter or inductor. |
Use Scenario: Compact, low-EMI flash solution for portable digital cameras with limited PCB area. IC Role / Device Role / Timing Role: Regulated 5-V source and fast-switching flash driver; operates from single-cell Li-ion with no magnetics. Use Value: Reduces solution footprint by >40% vs. inductor-based boost converters while maintaining 400 mA flash peak current. |
| Barcode Scanner Illumination | Emergency Strobe Lighting |
Use Scenario: Bright, uniform LED illumination for high-speed linear or 2D barcode reading in handheld scanners. IC Role / Device Role / Timing Role: Torch-mode LED driver delivering 200 mA continuous current to multiple white LEDs; dimmable via EN PWM. Use Value: Provides stable 5 V rail and programmable brightness without flicker-critical for reliable decode performance. |
Use Scenario: High-reliability visual alert in fire-alarm panels or industrial safety systems requiring long-life, low-maintenance flash. IC Role / Device Role / Timing Role: Pulsed 400 mA flash driver with thermal foldback and shutdown protection; driven by microcontroller GPIO. Use Value: Ensures compliance with strobe intensity and duty-cycle requirements (e.g., NFPA 72) using a single-chip, no-inductor solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530SD | Current-mode PWM-controlled LED driver with I²C interface; requires external inductor; supports up to 30 mA per channel (max 120 mA total) | Designed for RGB backlight dimming and multi-channel LED control-not optimized for high-current single-flash bursts | Choose LM3530SD only for color-balanced, digitally programmable multi-LED systems-not for 400 mA flash. |
| TPS61310DSKR | Inductor-based boost converter with 1.5-A switch; fixed 5-V output; 2-MHz switching; supports 500 mA continuous output | Higher efficiency at medium loads but larger solution size due to inductor; lacks integrated flash FET and <10 ns turnon | Choose TPS61310DSKR when continuous 500 mA is required and board space allows inductor placement; not drop-in for LM2753SD's flash timing role. |
Compared with LM3530SD and TPS61310DSKR, the LM2753SD uniquely combines inductor-less design, 400 mA pulsed flash capability, and <10 ns IOUT switching-making it the only option among the three that satisfies stringent mobile camera flash timing and space constraints without compromising peak current.
Availability
LM2753SD is available at Aetrix Electronics and suitable for cell-phone camera modules, digital still camera designs, and emergency strobe lighting systems requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LM2753SD 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 over 90 years of innovation in high-reliability, application-optimized ICs.
The LM2753SD belongs to TI's high-efficiency LED driver and charge-pump product line, engineered specifically for space-constrained, battery-powered imaging systems needing robust flash performance without inductors.
FAQ
What is the maximum pulsed flash current supported by the LM2753SD?
The LM2753SD supports up to 400 mA of pulsed flash current for durations up to 500 ms, as specified in its Electrical Characteristics table under IOUT test conditions (V(FLASH) = 1.8 V, VIOUT-MAX = 4.1 V). This rating is validated across –40°C to +85°C ambient and enables high-brightness still-image capture without external current limiting circuitry. The LM2753SD achieves this using its internal FET and charge-pump architecture, not a linear regulator.
How does the LM2753SD regulate output voltage without an inductor?
The LM2753SD uses a switched-capacitor (charge-pump) topology with a 2× voltage doubler configuration. It alternately charges and discharges external capacitors (C1, CIN, COUT) through internal MOSFET switches to generate and regulate a 5-V output. Regulation is achieved via pulse-frequency modulation (PFM), where switching occurs only when output voltage droops below the 5-V target-enabling high efficiency and ultra-low quiescent current. No inductor is required.
Can the LM2753SD drive both torch and flash modes simultaneously?
No-the LM2753SD does not support simultaneous torch and flash operation. Torch mode is enabled by applying a constant HIGH to EN and controlling current via RTORCH between VOUT and IOUT; flash mode requires pulsing FLASH while EN remains HIGH. Driving both inputs HIGH concurrently causes IOUT to short to VOUT, bypassing the torch resistor and disabling continuous illumination. The two modes are mutually exclusive by design.
What is the purpose of the three GND pins on the LM2753SD WSON package?
The LM2753SD features three dedicated GND pins (pins 5, 7, and 10) plus an exposed die-attach pad internally connected to GND. This layout minimizes ground impedance, reduces voltage bounce during high di/dt flash pulses, improves thermal conduction from the die to the PCB, and enhances noise immunity in sensitive camera modules. Proper PCB layout requires stitching all GND pins and the exposed pad to a solid ground plane.
Does the LM2753SD include thermal protection, and how does it behave?
Yes-the LM2753SD incorporates thermal shutdown protection that disables the device when junction temperature exceeds ~140°C (typical). Operation resumes automatically once the junction cools below ~125°C (typical). This behavior is documented in Section 7.3.8 of the datasheet and protects against damage during extended flash sequences or poor PCB thermal design. The 10-pin WSON package's RθJA of 52.5°C/W necessitates adequate copper pour for reliable thermal management.
LM2753SD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 4.75V ~ 5.25V
- Current - Output / Channel:
- 400mA (Flash)
- Frequency:
- 725kHz
- Dimming:
- PWM
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SON (3x3)
LM2753SD FAQ
1.How can I place an order for LM2753SD through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2753SD 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 LM2753SD reliable?
The price and inventory of LM2753SD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2753SD is usually 5 days.
3.What payment methods are accepted for LM2753SD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2753SD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2753SD?
LM2753SD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2753SD 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 LM2753SD?
For technical support, including LM2753SD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2753SD requirements.
6.How does Aetrix verify that LM2753SD is sourced from the original manufacturer or authorized distributors?
All LM2753SD 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 LM2753SD meets industry standards.
7.What is the process for return or replacement of LM2753SD?
All LM2753SD units undergo pre-shipment inspection (PSI). If there is an issue with LM2753SD, 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 LM2753SD part is unused and in its original packaging.
Return procedure for LM2753SD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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