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Texas Instruments LP3910SQX-AN/NOPB
- Part No.:
- LP3910SQX-AN/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LP3910SQX-AN/NOPB.pdf
- Description:
- IC PWR MGMT W/CHARGER 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,588
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Product details
Overview
LP3910SQX-AN/NOPB from Texas Instruments is a highly integrated power management IC (PMIC) for HDD-based portable media players, featuring two programmable LDOs (LDO1 = 1.2 V, LDO2 = 2.5 V), two DVS buck converters (Buck1 = 1.0 V, Buck2 = 1.8 V), a wide-load-range buck-boost (3.3 V), a linear Li-ion charger (1000 mA full-rate), 4-channel 8-bit ADC, and I²C interface. It delivers system-level power sequencing, battery monitoring, and LED status indication in a single WQFN-48 package.
For engineers reviewing the LP3910SQX-AN/NOPB datasheet, LP3910SQX-AN/NOPB pinout, LP3910SQX-AN/NOPB application, or LP3910SQX-AN/NOPB equivalent, key selection criteria include its 1000-mA wall-adapter charge capability, dual-slope 8-bit ADC for battery sensing, programmable DVS buck outputs, thermal interrupt threshold (115°C), and 400-kHz I²C-compatible control interface - all validated for hard-drive-based portable media systems.
Technical Context
The LP3910SQX-AN/NOPB implements dynamic voltage scaling via two independent PWM buck converters with factory-programmed default outputs (Buck1 = 1.0 V, Buck2 = 1.8 V), enabling CPU and memory voltage optimization during playback and standby. Its buck-boost converter supports wide-load operation up to 1 A at 3.3 V, while the linear charger integrates constant-current/constant-voltage regulation, 4.1–4.38-V selectable termination, and 0.35% battery-voltage accuracy.
System supervision includes an 8-bit dual-slope ADC with four analog inputs (TS, ISENSE, ADC1, ADC2), dedicated thermistor bias (IREF), and eight interrupt sources routed to IRQB. Power sequencing is managed through five configurable enable/delay settings (e.g., LDO1/LDO2 turn-on delay = 6 ms), and USB/adapter detection uses dedicated USBISEL/USBSUSP pins with programmable current limits (100/500/800 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO1 Output | 1.2 V ±3%, optimized for low-noise core logic supply with 60–150 mV dropout at 150 mA |
| LDO2 Output | 2.5 V ±3%, low-noise analog rail with 50 µVRMS noise (10 Hz–100 kHz) for audio/ADC circuits |
| Buck1 Output | 1.0 V ±2%, dynamically scalable CPU core voltage with PWM modulation and 15-ms startup delay |
| Charger Full-Rate Current | 1000 mA from wall adapter (CHG_DET ≥4.5 V), supporting fast recharge of single-cell Li-ion batteries |
| Battery Termination Voltage | Selectable 4.1 V / 4.2 V / 4.38 V with ±0.35% accuracy, enabling precise cell chemistry matching |
| I²C Interface Speed | 400 kHz compatible, with 0.3×VDDIO/0.7×VDDIO logic thresholds and Schmitt-trigger inputs for noise immunity |
| ADC Resolution | 8-bit dual-slope architecture with ±1 LSB INL/DNL, used for battery temperature (TS), charge current (ISENSE), and auxiliary sensing |
| Thermal Protection | 115°C thermal-alert interrupt and 160°C shutdown with 20°C hysteresis, ensuring safe operation under load |
Pinout & Package
The LP3910SQX-AN/NOPB is housed in a thermally enhanced 6.0 mm × 6.0 mm × 0.8 mm WQFN-48 package with exposed thermal pad (NJV suffix), supporting high-power dissipation (RθJA = 25°C/W) in compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TS | Battery temperature sense input | Analog input for NTC thermistor; enables JEITA-compliant charging profile and thermal cutoff |
| VIN1, VIN2, VIN3, VIN4, VDD1–3, VDDIO | Power input rails | Multiple dedicated inputs isolate LDO, buck, buck-boost, and digital I/O supplies to minimize cross-coupling |
| LDO2EN, BUCK1EN, ONOFF | Digital enable/control inputs | Level- or edge-triggered logic inputs with internal weak pulldowns (except ONOFF); support flexible power sequencing |
| CHG, STAT | LED status drivers | Open-drain outputs driving red (CHG) and green (STAT) LEDs with programmable current (8–12 mA) |
| IRQB, NRST, ONSTAT | Interrupt/reset outputs | Active-low open-drain signals for system wake-up, reset assertion, and ONOFF debounced state reporting |
| I2C_SDA, I2C_SCL | I²C bidirectional interface | 400-kHz compatible bus interface with 0.1×VDDIO hysteresis for robust communication in noisy environments |
| VBATT1–3, AGND, DGND, BBGND1–2, BCKGND1–2 | Ground and battery terminals | Dedicated analog/digital/buck-boost grounds reduce noise coupling; triple VBATT pins lower path resistance (50 mΩ) |
Key Features
| Feature | Design Value |
|---|---|
| Programmable DVS buck converters | Two independent PWM bucks (Buck1/Buck2) with factory-set outputs (1.0 V/1.8 V) and configurable sequencing delays for SoC voltage scaling |
| Wide-load buck-boost regulator | Single 3.3-V output capable of delivering up to 1 A across full battery voltage range (2.5–4.5 V), eliminating need for separate boost stage |
| Integrated Li-ion linear charger | 1000-mA full-rate wall-adapter charging with 50-mA pre-qualification, 0.1C/0.05C EOC, and 4.1–4.38-V termination selection |
| 4-channel 8-bit dual-slope ADC | Simultaneous monitoring of battery temp (TS), charge current (ISENSE), and two auxiliary analog signals (ADC1/ADC2) with ±1 LSB linearity |
| USB/adapter source detection | Dedicated USBISEL/USBSUSP pins enable automatic selection between USB (100/500/800 mA) and wall-adapter (1000 mA) charging modes |
| Thermal and safety supervision | Eight interrupt sources including thermal alert (115°C), battery low (2.5 V), overcurrent, and ten-hour safety timer for fail-safe operation |
Applications
| Hard Drive-Based Media Players | Portable Navigation Devices |
|---|---|
Use Scenario: Portable GPS units with rotating HDD storage, requiring stable multi-rail power under variable battery voltage and thermal conditions. IC Role / Device Role / Timing Role: Central PMIC managing HDD spindle motor supply (buck-boost), baseband processor core (Buck1), RF/analog section (LDO2), and battery fuel gauging (ADC + TS). Use Value: Enables continuous HDD operation down to 2.5 V battery voltage via buck-boost, while ADC-based temperature sensing prevents thermal runaway during extended navigation use. | Use Scenario: In-vehicle portable navigation systems with USB host connectivity, needing seamless transition between car-USB and internal battery power. IC Role / Device Role / Timing Role: System power supervisor detecting USB presence (USBISEL), enabling fast 1000-mA wall-adapter charging, and sequencing LDOs/bucks for map rendering and GPS baseband. Use Value: Eliminates external USB switch and discrete charger; integrated 8-bit ADC provides accurate battery state-of-charge estimation for remaining runtime prediction. |
| Portable Gaming Players | Industrial Handheld Terminals |
Use Scenario: Battery-powered gaming consoles with HDD storage, demanding dynamic voltage scaling for CPU/GPU and low-noise analog supply for audio DACs. IC Role / Device Role / Timing Role: Dual DVS buck regulators (Buck1/Buck2) scale processor and memory voltages in real time; LDO2 delivers ultra-low-noise 2.5 V to audio subsystem. Use Value: Reduces system power by >30% during idle gameplay via DVS, while LDO2's 50 µVRMS noise ensures clean audio output without post-regulation filtering. | Use Scenario: Ruggedized handheld terminals used in logistics, with HDD-based data logging, barcode scanning, and long-term battery operation. IC Role / Device Role / Timing Role: Unified power controller handling battery charging (1000 mA), HDD spin-up surge (buck-boost), scanner laser driver (LDO1), and MCU core (Buck1). Use Value: Single-chip integration reduces BOM count by 12+ discrete components; thermal interrupt (115°C) prevents damage during extended barcode scanning in hot warehouses. |
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 | Three buck converters (no buck-boost), no integrated Li-ion charger, 6-bit ADC, 2.8-V LDO1 default | Targeted at OMAP-based PMPs with lower charge current needs (500 mA max) and no HDD-level buck-boost demand | Choose when system lacks HDD or requires higher buck count but accepts external charger |
| TPS65053RGER | Two bucks + one LDO only, no ADC, no battery charger, no TS input, 1.8-V LDO2 default | Suitable for simpler portable devices (e.g., MP3 players) without battery monitoring or thermal protection | Choose for cost-sensitive, non-battery-fueled applications where full PMIC functionality is unnecessary |
Compared with TPS65023RSBR and TPS65053RGER, the LP3910SQX-AN/NOPB uniquely integrates buck-boost for HDD operation, 1000-mA charger, and 8-bit ADC - making it irreplaceable in HDD-based portable media where wide-input regulation, precise battery management, and analog sensing are mandatory.
Availability
LP3910SQX-AN/NOPB is available at Aetrix Electronics and suitable for hard drive-based media players, portable navigation devices, industrial handheld terminals, and portable gaming systems requiring stable component supply, long-lifecycle support, and automotive-grade thermal reliability.
Supply support for LP3910SQX-AN/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 engineered specifically for HDD-based portable media players, integrating battery charging, multi-rail DC-DC conversion, analog sensing, and system supervision into a single chip to eliminate discrete power components and simplify layout.
FAQ
What is the default output voltage configuration of LP3910SQX-AN/NOPB?
The LP3910SQX-AN/NOPB is factory-programmed with LDO1 = 1.2 V, LDO2 = 2.5 V, Buck1 = 1.0 V, Buck2 = 1.8 V, and buck-boost = 3.3 V. These defaults are confirmed in Table 1 of the SNVS481M datasheet and apply directly to this orderable variant. The LP3910SQX-AN/NOPB retains full I²C programmability to adjust outputs within their respective ranges (e.g., LDO1 1.2–3.3 V in 100-mV steps).
Does LP3910SQX-AN/NOPB support both USB and wall-adapter charging simultaneously?
No - the LP3910SQX-AN/NOPB implements priority-based source selection: wall adapter (CHG_DET) takes precedence over USB (USBPWR). When both are present, the device disables USB charging and routes full 1000-mA current from the adapter. This behavior is enforced by internal logic and documented in Section 7.7 (Li-Ion Charger Characteristics) of the datasheet.
What is the maximum continuous output current of the buck-boost converter in LP3910SQX-AN/NOPB?
The buck-boost converter in LP3910SQX-AN/NOPB delivers up to 1 A continuously at 3.3 V across the full battery input range (2.5–4.5 V), as verified by thermal testing in the datasheet's Recommended Operating Conditions (Section 7.3) and Electrical Characteristics (Section 7.17). This rating assumes proper PCB thermal design per Layout Guidelines (Section 11).
How does the LP3910SQX-AN/NOPB handle battery temperature monitoring?
The LP3910SQX-AN/NOPB monitors battery temperature via the TS pin using an external NTC thermistor, with bias current (7.75–8.25 µA) sourced from the IREF pin. The integrated 8-bit ADC digitizes the thermistor voltage, and firmware uses lookup tables to derive temperature - enabling JEITA-compliant charge rate reduction above 45°C or cutoff at 60°C, as defined in Section 7.7.
Is LP3910SQX-AN/NOPB pin-compatible with other variants in the LP3910 family?
Yes - all LP3910 variants, including LP3910SQX-AN/NOPB, share the identical 48-pin WQFN (NJV) package and pinout. Table 1 confirms identical pin assignments across SQ-AA, SQX-AK, SQ-AM, and SQX-AN variants. No PCB redesign is required when migrating between factory-programmed options; only I²C register settings may differ.
LP3910SQX-AN/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- 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-AN/NOPB FAQ
1.How can I place an order for LP3910SQX-AN/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3910SQX-AN/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-AN/NOPB reliable?
The price and inventory of LP3910SQX-AN/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-AN/NOPB is usually 5 days.
3.What payment methods are accepted for LP3910SQX-AN/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3910SQX-AN/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3910SQX-AN/NOPB?
LP3910SQX-AN/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3910SQX-AN/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-AN/NOPB?
For technical support, including LP3910SQX-AN/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3910SQX-AN/NOPB requirements.
6.How does Aetrix verify that LP3910SQX-AN/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3910SQX-AN/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-AN/NOPB meets industry standards.
7.What is the process for return or replacement of LP3910SQX-AN/NOPB?
All LP3910SQX-AN/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3910SQX-AN/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-AN/NOPB part is unused and in its original packaging.
Return procedure for LP3910SQX-AN/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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