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Texas Instruments LP3910SQX-AP/NOPB
- Part No.:
- LP3910SQX-AP/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LP3910SQX-AP/NOPB.pdf
- Description:
- IC PWR MGMT W/CHARGER 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,955
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Product details
Overview
LP3910SQX-AP/NOPB from Texas Instruments is a highly integrated power management IC (PMIC) for HDD-based portable media players, featuring two programmable LDOs (LDO1/LDO2), two DVS buck converters (Buck1/Buck2), a wide-load-range buck-boost DC-DC converter, a linear Li-ion battery charger, 4-channel 8-bit ADC, and I²C interface. It delivers system-level power sequencing, battery monitoring, USB/adapter charging, and LED status indication in a single 48-pin WQFN package.
For engineers reviewing the LP3910SQX-AP/NOPB datasheet, LP3910SQX-AP/NOPB pinout, LP3910SQX-AP/NOPB application, or LP3910SQX-AP/NOPB equivalent, this page provides verified technical context, exact pin functions, confirmed default voltage settings for the AP variant, real-world use cases in portable media systems, and validated alternative PMICs with documented functional differences.
Technical Context
The LP3910SQX-AP/NOPB implements a multi-rail, programmable power architecture with dynamic voltage scaling (DVS) on Buck1 and Buck2, enabling adaptive core voltage control for HDD and apps processors. Its buck-boost converter supports wide load range operation at 3.3 V nominal output, while LDO2 is optimized for low-noise analog supply (e.g., audio codec, touch controller).
Battery management includes constant-current/constant-voltage charging up to 500 mA from wall adapter or USB, programmable termination voltages (4.1 V / 4.2 V / 4.38 V), 0.35% termination accuracy, and thermistor-based temperature sensing via TS pin. System supervision features include 8-source IRQB interrupt, NRST reset, ONSTAT debounced ON/OFF state reporting, and continuous battery voltage monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO1 Output Voltage (AP) | 2.8 V - factory-programmed default for general-purpose logic rails |
| LDO2 Output Voltage (AP) | 1.5 V - factory-programmed low-noise analog supply for audio/touch circuits |
| Buck1 Output Voltage (AP) | 1.45 V - DVS-enabled core voltage for HDD or apps processor |
| Buck-Boost Output | 3.3 V - wide-load-range output supporting USB PHY, memory, or interface logic |
| Full-Rate Charge Current | 500 mA - wall-adapter charging capability with 100–1000 mA programmability |
| I²C Interface Speed | 400 kHz - standard-mode compatible for host MCU configuration and telemetry |
| ADC Resolution | 8-bit dual-slope - supports battery voltage, temperature, and auxiliary analog sensing |
| Package | 48-pin WQFN (6 mm × 6 mm × 0.8 mm) - thermally enhanced for high-power density layouts |
Pinout & Package
LP3910SQX-AP/NOPB is housed in a 6 mm × 6 mm × 0.8 mm thermally enhanced WQFN-48 package with exposed thermal pad. Pin functions are fully defined per TI SNVS481M datasheet Rev M.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TS | Battery temperature sense input | Analog input for NTC thermistor; enables JEITA-compliant charge profile adaptation |
| VBATT1/2/3 | Positive battery terminal | Three parallel battery connection pins reduce path resistance to ≤50 mΩ total |
| LDO2EN | Digital enable for LDO2 | Active-high input; weak internal pulldown ensures safe power-down at startup |
| VFB1 / VFB2 / VBBFB | Feedback inputs for Buck1, Buck2, Buck-Boost | Resistive divider nodes for precise output voltage programming and regulation |
| IRQB | Open-drain interrupt request | Active-low signal with 8 configurable sources (e.g., battery low, thermal alert, EOC) |
| CHG / STAT | LED status drivers | CHG = red LED (charging active); STAT = green LED (CV/fully charged states) |
| I2C_SDA / I2C_SCL | I²C bidirectional data/clock | 400-kHz compatible interface for register read/write and real-time telemetry |
| USBISEL / USBSUSP | USB current limit selection | Configures USB charge current to 100/500/800 mA or enables suspend mode |
Key Features
| Feature | Design Value |
|---|---|
| Programmable DVS Buck Converters | Buck1 and Buck2 support dynamic voltage scaling under host MCU control to optimize power vs. performance for HDD and apps processor |
| Integrated Linear Charger | Single-cell Li-ion charger with 0.35% VTERM accuracy, 50 mA pre-qual, and 10-hour safety timer - eliminates external charge controller |
| Low-Noise Analog LDO (LDO2) | 1.5 V output with 50 µVRMS noise (10 Hz–100 kHz) - suitable for audio DACs, touch controllers, and precision ADC references |
| 4-Channel 8-Bit Dual-Slope ADC | Measures battery voltage, temperature (TS), CHG current (ISENSE), and auxiliary inputs - enables closed-loop battery health monitoring |
| Thermal & Safety Supervision | 115°C thermal interrupt threshold, 160°C shutdown with 20°C hysteresis, and battery low detection at 2.5 V - ensures robust system reliability |
| Sequenced Power-On/Off Control | Configurable turn-on delays (T1–T5) for LDOs, bucks, and NRST - prevents rail contention and meets HDD spin-up timing requirements |
Applications
| Hard Drive-Based Media Players | Portable Navigation Devices |
|---|---|
Use Scenario: Portable GPS units with rotating HDD storage for map data, requiring stable multi-rail power during vehicle vibration and thermal cycling. IC Role / Device Role / Timing Role: LP3910SQX-AP/NOPB supplies sequenced 1.45 V (HDD controller), 3.3 V (USB PHY), 2.8 V (UI processor), and 1.5 V (audio codec), while managing Li-ion charge and battery health. Use Value: Integrated buck-boost eliminates need for separate 3.3 V boost converter; ADC-based battery monitoring extends runtime estimation accuracy by ±2%. |
Use Scenario: In-vehicle navigation systems with HDD-based map databases and real-time traffic updates over cellular/USB. IC Role / Device Role / Timing Role: LP3910SQX-AP/NOPB delivers DVS-controlled 1.45 V to navigation SoC, powers GPS RF front-end from LDO2, and manages dual-source (USB/car adapter) charging. Use Value: Factory-programmed AP defaults reduce firmware initialization overhead; IRQB interrupt enables instant low-battery UI alerts without polling. |
| Portable Gaming Players | Industrial Handheld Terminals |
Use Scenario: Battery-powered gaming devices with HDD storage, touchscreen, stereo audio, and USB connectivity. IC Role / Device Role / Timing Role: LP3910SQX-AP/NOPB powers GPU core (Buck1), memory interface (Buck-Boost), touch controller (LDO2), and audio amplifier (LDO1), while handling USB charging and thermal throttling. Use Value: 50 µVRMS LDO2 noise prevents audible hiss in headphone output; STAT/CHG LED drivers eliminate external LED driver ICs. |
Use Scenario: Ruggedized field terminals using HDD for logging, with extended temperature operation and battery backup. IC Role / Device Role / Timing Role: LP3910SQX-AP/NOPB regulates 2.8 V for ARM Cortex-M7 MCU, 1.5 V for precision ADC sensor interface, and 3.3 V for RS-485 transceivers, while monitoring battery health across –40°C to +85°C. Use Value: TS pin + ADC enables accurate battery temperature compensation; 125°C max junction rating supports sealed industrial enclosures. |
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 battery charger or ADC; 40-pin QFN; fixed 1.2/1.5/1.8 V buck outputs | Targeted at OMAP3-based portable devices without HDD or advanced battery telemetry needs | Choose TPS65023RSBR when charger/ADC integration is unnecessary and fixed-output bucks suffice |
| MAX8660ETJ+T | Quad buck + triple LDO; no battery charger; 32-pin TQFN; supports I²C but lacks TS/ADC/buck-boost | Designed for low-power handhelds with flash storage, not HDD-based systems requiring wide-load buck-boost | Choose MAX8660ETJ+T for compact flash-based designs where battery management is handled externally |
Compared with LP3910SQX-AP/NOPB, TPS65023RSBR offers higher buck efficiency but omits battery charging and analog sensing; MAX8660ETJ+T provides more LDOs but lacks the critical buck-boost rail and thermal-aware charging required for HDD-based platforms.
Availability
LP3910SQX-AP/NOPB is available at Aetrix Electronics and suitable for hard drive-based media players, portable navigation devices, industrial handheld terminals, and gaming platforms requiring stable component supply, long-lifecycle support, and full-featured battery management.
Supply support for LP3910SQX-AP/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, multi-rail conversion, battery charging, and analog telemetry into a single PMIC to replace discrete power subsystems.
FAQ
What is the factory-programmed default output voltage for LDO2 on LP3910SQX-AP/NOPB?
The LP3910SQX-AP/NOPB has LDO2 factory-programmed to 1.5 V, as specified in Table 2 of the SNVS481M datasheet for the AP option. This low-noise output is intended for analog circuits such as audio codecs or touch controllers, and can be reconfigured via I²C if needed. The LP3910SQX-AP/NOPB maintains this setting across temperature and load variations within ±3% accuracy.
Does LP3910SQX-AP/NOPB support both USB and wall adapter charging simultaneously?
No - LP3910SQX-AP/NOPB supports automatic source selection but not simultaneous charging. It detects USBPWR (5 V) or CHG_DET (≥4.5 V) and prioritizes the higher-voltage source, disabling the other path via internal FET control. The LP3910SQX-AP/NOPB implements reverse current blocking on USB to prevent battery discharge into the USB port, ensuring safe single-source operation.
What is the maximum continuous charge current supported by LP3910SQX-AP/NOPB from a wall adapter?
The LP3910SQX-AP/NOPB supports up to 500 mA full-rate charging current from a wall adapter input (CHG_DET ≥4.5 V), as confirmed in Section 7.7 of the SNVS481M datasheet. This value is programmable up to 1000 mA depending on external resistor (IREF) and register settings, but the AP variant defaults to 500 mA. The LP3910SQX-AP/NOPB also includes thermal regulation to maintain safe junction temperature during sustained charging.
How does the buck-boost converter in LP3910SQX-AP/NOPB differ from the buck converters?
The buck-boost converter in LP3910SQX-AP/NOPB operates across a wide load range with fixed 3.3 V output, supporting both step-up and step-down modes to maintain regulation as battery voltage drops from 4.2 V to 2.5 V. In contrast, Buck1 and Buck2 are standard synchronous buck converters with DVS capability but no boost functionality. The LP3910SQX-AP/NOPB uses this buck-boost rail for USB PHY, memory, or interface logic that requires stable 3.3 V regardless of battery state.
Is LP3910SQX-AP/NOPB pin-compatible with other variants like LP3910SQX-AA or LP3910SQX-AN?
Yes - all LP3910SQX-x variants share identical 48-pin WQFN packaging and pinout, including LP3910SQX-AP/NOPB, LP3910SQX-AA, and LP3910SQX-AN. Differences are limited to factory-programmed default voltages, charge current, and sequencing delays; no PCB layout changes are required when substituting between SQX variants. The LP3910SQX-AP/NOPB retains full electrical and mechanical compatibility with the broader LP3910 family.
LP3910SQX-AP/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)
LP3910SQX-AP/NOPB FAQ
1.How can I place an order for LP3910SQX-AP/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3910SQX-AP/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 LP3910SQX-AP/NOPB reliable?
The price and inventory of LP3910SQX-AP/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3910SQX-AP/NOPB is usually 5 days.
3.What payment methods are accepted for LP3910SQX-AP/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3910SQX-AP/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3910SQX-AP/NOPB?
LP3910SQX-AP/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3910SQX-AP/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 LP3910SQX-AP/NOPB?
For technical support, including LP3910SQX-AP/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3910SQX-AP/NOPB requirements.
6.How does Aetrix verify that LP3910SQX-AP/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3910SQX-AP/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 LP3910SQX-AP/NOPB meets industry standards.
7.What is the process for return or replacement of LP3910SQX-AP/NOPB?
All LP3910SQX-AP/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3910SQX-AP/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 LP3910SQX-AP/NOPB part is unused and in its original packaging.
Return procedure for LP3910SQX-AP/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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