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Texas Instruments LP3910SQ-AK/NOPB
- Part No.:
- LP3910SQ-AK/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LP3910SQ-AK/NOPB.pdf
- Description:
- IC PWR MGMT W/CHRGR 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
LP3910SQ-AK/NOPB from Texas Instruments is a highly integrated power management IC (PMIC) for HDD-based portable media players, featuring two programmable LDOs (LDO1 = 2.5 V, LDO2 = 3.0 V), two DVS buck converters (Buck1 = 1.6 V, Buck2 = 1.8 V), a wide-load-range buck-boost (3.3 V), a linear Li-ion charger (100 mA full-rate), and an 8-bit dual-slope ADC. It supports USB/adapter charging, battery temperature monitoring, and LED status indication in a single 48-pin WQFN package.
For engineers reviewing the LP3910SQ-AK/NOPB datasheet, LP3910SQ-AK/NOPB pinout, LP3910SQ-AK/NOPB application, or LP3910SQ-AK/NOPB equivalent, this device delivers system-level power sequencing, dynamic voltage scaling for processor cores, analog rail isolation, battery health supervision, and I²C-programmable configuration - all critical for portable HDD media player power architecture validation and BOM consolidation.
Technical Context
The LP3910SQ-AK/NOPB implements a multi-rail, mixed-mode power architecture with independent enable/control logic per regulator: LDO1 (general-purpose, 2.5 V), LDO2 (low-noise analog, 3.0 V), Buck1 (1.6 V DVS for apps processor core), Buck2 (1.8 V DVS for memory/I/O), and buck-boost (3.3 V for HDD interface). Its integrated linear charger supports 100 mA full-rate wall-adapter charging with 4.2 V termination, 50 mA pre-qualification, and thermistor-based temperature sensing via TS pin.
System supervision includes a 4-channel 8-bit ADC (±1 LSB INL/DNL), 8-source interrupt output (IRQB), NRST reset generation, ONSTAT debounced power-state indicator, and real-time battery voltage monitoring with 2.5 V low-battery threshold. All functions are configured via a 400-kHz I²C-compatible interface (address 0x60 hex).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO1 Output Voltage | 2.5 V - factory-programmed for general-purpose digital rails (e.g., touch controller, audio codec I/O) |
| LDO2 Output Voltage | 3.0 V - factory-programmed low-noise analog supply for audio DAC/ADC or sensor interfaces |
| Buck1 Output Voltage | 1.6 V - DVS-enabled core supply for apps processor, configurable via I²C register |
| Buck2 Output Voltage | 1.8 V - DVS-enabled I/O/memory supply, synchronized to system load states |
| Buck-Boost Output | 3.3 V - wide-load-range output for HDD interface or USB PHY, maintains regulation down to 2.5 V input |
| Charger Full-Rate Current | 100 mA - wall-adapter sourced, with 0.1C end-of-charge detection and 4.2 V termination accuracy ±0.35% |
| ADC Resolution | 8-bit dual-slope - measures battery voltage, temperature (TS), CHG_DET, and USBPWR with ±1 LSB INL/DNL |
| I²C Address | 0x60 (hex) - metal-mask configurable; supports system-level PMIC coordination in multi-device architectures |
Pinout & Package
LP3910SQ-AK/NOPB is housed in a thermally enhanced 6.0 mm × 6.0 mm × 0.8 mm 48-pin WQFN (NJV) package with exposed thermal pad. Pin assignment follows TI's standardized layout for high-current path separation (VBATT1/2/3, BBGND1/2, BCKGND1/2) and noise-sensitive analog routing (VREFH, TS, ADC1/2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBATT1/2/3 | Battery positive terminal | Three parallel pins reduce path resistance (50 mΩ total) and improve thermal dissipation during charge/discharge |
| TS | Battery temperature sense input | Analog input for 100 kΩ NTC thermistor; enables JEITA-compliant charge profile throttling |
| LDO2EN / BUCK1EN | Digital enable inputs | Active-high control signals with internal weak pulldown; support sequenced power-up (T1–T4 delays) |
| CHG / STAT | LED driver outputs | Open-drain red (CHG) and green (STAT) indicators with programmable current (8–12 mA typical) |
| IRQB / NRST | Interrupt and reset outputs | Open-drain active-low signals with 8 interrupt sources and 10 ms NRST assertion delay |
| I2C_SDA / I2C_SCL | I²C interface | 400-kHz compatible, 3.6 V tolerant; support register read/write for voltage, timing, and fault configuration |
Key Features
| Feature | Design Value |
|---|---|
| Dual LDO architecture with separate enable/control | LDO1 (2.5 V, general) and LDO2 (3.0 V, low-noise) provide isolated, low-ripple supplies for mixed-signal SoC subsystems |
| Dynamic voltage scaling (DVS) on Buck1/Buck2 | Enables real-time core/I/O voltage adjustment via I²C to match processor performance states and minimize active power |
| Integrated linear Li-ion charger | Supports USB (100/500/800 mA limits) and adapter (100 mA full-rate) charging with 4.2 V termination ±0.35% and 10-hour safety timer |
| 4-channel 8-bit ADC | Measures battery voltage, temperature, adapter detect, and USB voltage with ±1 LSB linearity for closed-loop battery management |
| Programmable power-on sequencing | Configurable turn-on delays (T1–T4) ensure safe ramp-up order: LDOs → Buck1 → Buck2 → Buck-Boost → NRST |
| Thermal and fault supervision | Includes thermal shutdown (160°C), thermal interrupt (115°C), battery low (2.5 V), overcurrent protection, and reverse-current blocking |
Applications
| Hard Drive Media Players | Portable Navigation Devices |
|---|---|
|
Use Scenario: Powering HDD spindle motor, SATA interface, ARM-based navigation SoC, and GPS receiver in automotive-grade portable units. IC Role / Device Role / Timing Role: Central PMIC managing all voltage domains: Buck-Boost (3.3 V HDD interface), Buck1 (1.6 V SoC core), LDO2 (3.0 V GPS RF front-end). Use Value: Eliminates discrete regulators and charger ICs; enables JEITA-compliant thermal charging and real-time battery health reporting via ADC. |
Use Scenario: Supporting GPS/GLONASS baseband processing, touchscreen controller, and flash memory in handheld navigation units. IC Role / Device Role / Timing Role: System power manager delivering sequenced, DVS-adjusted rails: Buck2 (1.8 V memory), LDO1 (2.5 V touch I/O), STAT/CHG (LED status feedback). Use Value: Reduces component count by 7+ discrete ICs; provides precise 2.5 V LDO1 for capacitive touch sensing with <50 µV RMS noise. |
| Portable Gaming Players | USB-Powered Audio Devices |
|
Use Scenario: Supplying GPU core, video decoder, and audio codec in battery-operated handheld gaming systems with HDD storage. IC Role / Device Role / Timing Role: Multi-rail power source with Buck1 (1.6 V GPU), Buck-Boost (3.3 V HDMI/audio interface), and LDO2 (3.0 V audio DAC reference). Use Value: Enables dynamic GPU voltage scaling during gameplay; LDO2's 50 µV RMS noise ensures SNR >95 dB in audio playback. |
Use Scenario: Providing regulated power and battery charging for USB-powered DAC/headphone amplifiers with onboard storage. IC Role / Device Role / Timing Role: Dual-role PMIC: charges Li-ion via USBPWR while powering analog audio rails (LDO2 = 3.0 V) and digital logic (LDO1 = 2.5 V). Use Value: Supports simultaneous USB host charging and audio playback without cross-regulator noise coupling; CHG/STAT LEDs indicate charge state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | Triple buck + dual LDO; no integrated Li-ion charger or ADC; 40-pin QFN; fixed 1.2/1.5/1.8 V bucks | Targeted at OMAP-based tablets; lacks battery temperature sensing and programmable EOC | Select when charger/ADC integration is unnecessary and board space favors smaller package |
| TPS65053RGER | Dual buck + triple LDO; no buck-boost or linear charger; 24-pin VQFN; supports only USB charging (500 mA max) | Suitable for low-cost portable audio; no HDD interface support or thermal regulation | Choose for cost-sensitive designs where 3.3 V buck-boost for HDD is not required |
Compared with TPS65023RSBR and TPS65053RGER, the LP3910SQ-AK/NOPB uniquely integrates buck-boost for HDD interface, JEITA-compliant charging with thermistor input, and 4-channel ADC - making it irreplaceable in HDD-based media players requiring full battery health visibility and wide-input-range system rail generation.
Availability
LP3910SQ-AK/NOPB is available at Aetrix Electronics and suitable for hard drive media players, portable navigation devices, portable gaming players, and USB-powered audio devices requiring stable component supply across extended production lifecycles.
Supply support for LP3910SQ-AK/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 portable power solutions.
The LP3910 product line was designed specifically for HDD-based portable media players, integrating system power sequencing, dynamic voltage scaling, battery charging, and analog monitoring into a single compact PMIC to replace 10+ discrete components.
FAQ
What is the factory-programmed output voltage of LDO1 in LP3910SQ-AK/NOPB?
The LP3910SQ-AK/NOPB has LDO1 factory-programmed to 2.5 V, as confirmed in Table 1 (Device Comparison Tables) of the SNVS481M datasheet. This voltage is optimized for general-purpose digital subsystems such as touch controllers or audio codec I/O interfaces, and remains stable across load currents up to 150 mA with ±3% accuracy.
Does LP3910SQ-AK/NOPB support USB charging with current limiting?
Yes, LP3910SQ-AK/NOPB supports USB charging with selectable current limits of 100 mA, 500 mA, or 800 mA via the USBISEL pin. The device also includes a 50 mA pre-qualification stage and USB suspend mode detection via USBSUSP, ensuring compliance with USB 2.0 power specifications while protecting the battery during low-power states.
How does the buck-boost converter in LP3910SQ-AK/NOPB differ from the buck converters?
The buck-boost converter in LP3910SQ-AK/NOPB delivers a fixed 3.3 V output across a wide input range (down to 2.5 V), enabling uninterrupted operation during deep battery discharge - unlike Buck1 and Buck2, which are step-down-only and require VIN ≥ VOUT + 0.5 V. This makes the buck-boost essential for powering HDD interfaces and USB PHYs under varying battery conditions.
Can LP3910SQ-AK/NOPB monitor battery temperature, and how is it implemented?
Yes, LP3910SQ-AK/NOPB monitors battery temperature using the TS pin, which connects to a 100 kΩ NTC thermistor. The internal circuitry converts the thermistor voltage into a digital reading via the 8-bit ADC, enabling JEITA-compliant charge current reduction above 45°C or below 0°C - a feature explicitly documented in the "Battery Temperature Measurement" section of the datasheet.
What is the I²C address of LP3910SQ-AK/NOPB, and is it configurable?
The I²C address of LP3910SQ-AK/NOPB is 0x60 (hex), implemented as a metal-mask option per the "Device Information" section of SNVS481M. While the default is fixed, TI offers custom mask options for address variation in multi-PMIC systems - however, no field-programmable address change is supported after manufacturing.
LP3910SQ-AK/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Handheld/Mobile Devices
- Current - Supply:
- -
- Voltage - Supply:
- 2.5V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-WQFN (6x6)
LP3910SQ-AK/NOPB FAQ
1.How can I place an order for LP3910SQ-AK/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3910SQ-AK/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 LP3910SQ-AK/NOPB reliable?
The price and inventory of LP3910SQ-AK/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3910SQ-AK/NOPB is usually 5 days.
3.What payment methods are accepted for LP3910SQ-AK/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3910SQ-AK/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3910SQ-AK/NOPB?
LP3910SQ-AK/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3910SQ-AK/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 LP3910SQ-AK/NOPB?
For technical support, including LP3910SQ-AK/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3910SQ-AK/NOPB requirements.
6.How does Aetrix verify that LP3910SQ-AK/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3910SQ-AK/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 LP3910SQ-AK/NOPB meets industry standards.
7.What is the process for return or replacement of LP3910SQ-AK/NOPB?
All LP3910SQ-AK/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3910SQ-AK/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 LP3910SQ-AK/NOPB part is unused and in its original packaging.
Return procedure for LP3910SQ-AK/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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