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Texas Instruments LP3910SQ-AN/NOPB
- Part No.:
- LP3910SQ-AN/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LP3910SQ-AN/NOPB.pdf
- Description:
- IC PWR MGMT W/CHARGER 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
LP3910SQ-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, thermal regulation, and LED status indication in a single WQFN-48 package.
For engineers reviewing the LP3910SQ-AN/NOPB datasheet, LP3910SQ-AN/NOPB pinout, LP3910SQ-AN/NOPB application, or LP3910SQ-AN/NOPB equivalent, this PMIC supports precise voltage rail control for hard-drive spindle motors, audio codec analog supplies, apps processor core domains, and USB/adapter charging paths - with factory-programmed defaults confirmed for 1.2 V/2.5 V LDOs and 1000 mA charge current.
Technical Context
The LP3910SQ-AN/NOPB implements dynamic voltage scaling (DVS) on both buck converters to reduce power during low-performance states, while its buck-boost regulator maintains stable 3.3 V output across 2.5–4.5 V battery input range. The integrated linear charger supports USB (100/500/800 mA) and wall adapter (1000 mA) inputs with selectable 4.1/4.2/4.38 V termination voltages and ±0.35% accuracy at 4.2 V.
Its 4-channel 8-bit dual-slope ADC monitors battery temperature (via TS pin), charge current (ISENSE), and two external analog signals (ADC1/ADC2), feeding data to the I²C host for real-time battery health and thermal management. All regulators feature programmable enable timing (T1–T4 delays), overcurrent protection, and thermal shutdown at 160°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO1 Output | 1.2 V (factory-programmed default; programmable 1.2–3.3 V in 100-mV steps) |
| LDO2 Output | 2.5 V (factory-programmed default; low-noise analog supply; 50 µVRMS noise) |
| Buck1 Output | 1.0 V (DVS-enabled; supports apps processor core domain with <150 mV dropout) |
| Buck-Boost Output | 3.3 V (wide-input: 2.5–4.5 V battery; powers HDD logic and USB PHY) |
| Charge Current | 1000 mA (wall adapter full-rate; 0.05C/0.1C end-of-charge selectable) |
| I²C Interface | 400 kHz compatible; 7-bit address 0x60 (hex); supports register read/write for all functions) |
| ADC Resolution | 8-bit dual-slope; ±1 LSB INL/DNL; channels for TS, ISENSE, ADC1, ADC2) |
| Package | 48-pin WQFN (6.0 mm × 6.0 mm × 0.8 mm); RθJA = 25°C/W; thermally enhanced for PMIC duty |
Pinout & Package
LP3910SQ-AN/NOPB is housed in a 6 mm × 6 mm × 0.8 mm thermally enhanced WQFN-48 package with exposed thermal pad (pin 49 not used). Pin 1 is located at top-left corner (marked dot), and pins are numbered counter-clockwise. AGND, DGND, BBGND1/2, BCKGND1/2, and GND-connected pins must be tied to a low-impedance ground plane for stable regulation and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TS | Battery temperature sense input | Connects to NTC thermistor; enables thermal cutoff and charge rate adjustment |
| VBATT1/2/3 | Battery positive terminals | Must be externally shorted; provides battery path with 50 mΩ total resistance |
| LDO2EN / BUCK1EN | Digital enable inputs | Active-high; weak internal pulldown; controls power-up sequencing delay (T1/T2) |
| VFB1 / VFB2 / VBBFB | Feedback inputs for buck/buck-boost | Resistive divider sets output voltage; supports DVS via I²C register update |
| CHG / STAT | LED status outputs | CHG = red LED (charging active); STAT = green LED (CC/CV/fully charged) |
| I2C_SDA / I2C_SCL | I²C bidirectional data/clock | 400 kHz operation; 0.7×VDDIO high threshold; open-drain with external pullup required |
| USBSUSP / USBISEL | USB current limit configuration | USBSUSP = suspend mode enable; USBISEL selects 100/500/800 mA USB charge limit |
| IRQB / NRST | Interrupt and reset outputs | Open-drain active-low; IRQB signals 8 interrupt sources; NRST asserts during standby |
Key Features
| Feature | Design Value |
|---|---|
| Programmable LDO1/LDO2 | Independent 1.2 V/2.5 V outputs with <150 mV dropout at 150 mA; LDO2 optimized for analog noise (<50 µVRMS) |
| Dual DVS Buck Converters | Buck1 (1.0 V) and Buck2 (1.8 V) support dynamic voltage scaling via I²C to match processor load states |
| Wide-Range Buck-Boost | Delivers regulated 3.3 V from 2.5–4.5 V battery input; eliminates need for separate 3.3 V LDO or boost stage |
| Linear Li-ion Charger | 1000 mA wall-adapter full-rate; ±0.35% termination accuracy at 4.2 V; pre-qualification at 50 mA |
| Integrated 4-Channel ADC | 8-bit dual-slope; measures battery temp (TS), charge current (ISENSE), and two external analog signals |
| Thermal & Safety Management | 160°C thermal shutdown (20°C hysteresis), 10-hour safety timer, reverse-current blocking, and battery low detection (2.5 V) |
Applications
| Hard Drive-Based Media Players | Portable Navigation Devices |
|---|---|
Use Scenario: Powering HDD spindle motor, servo controller, and NAND flash memory in battery-operated GPS units with USB sync. IC Role / Device Role / Timing Role: LP3910SQ-AN/NOPB manages all system rails: buck-boost (3.3 V HDD logic), Buck1 (1.0 V CPU core), LDO2 (2.5 V audio codec), and linear charger (1000 mA). Use Value: Eliminates discrete DC-DC stages and reduces BOM count by integrating 5 regulators, charger, ADC, and sequencing logic in one WQFN-48. |
Use Scenario: Supporting dual-core application processor, capacitive touch controller, and high-brightness display backlight in automotive-grade PNDs. IC Role / Device Role / Timing Role: LP3910SQ-AN/NOPB supplies sequenced 1.0 V (CPU), 1.8 V (I/O), 2.5 V (touch analog), and 3.3 V (display interface) with thermal monitoring via TS pin. Use Value: Factory-programmed 1.2 V/2.5 V LDOs and 1.0 V/1.8 V bucks ensure immediate compatibility with common SoC voltage requirements. |
| Portable Gaming Players | USB-Powered Audio Accessories |
Use Scenario: Delivering clean, low-noise power to GPU, audio DAC, and vibration motor in handheld game consoles with rechargeable Li-ion battery. IC Role / Device Role / Timing Role: LP3910SQ-AN/NOPB uses LDO2 (2.5 V) for analog audio supply, buck-boost (3.3 V) for USB interface, and STAT/CHG pins for user-facing LED status. Use Value: 50 µVRMS LDO2 noise and ±1 LSB ADC linearity preserve audio fidelity and battery fuel-gauge accuracy. |
Use Scenario: Enabling USB bus-powered headphone amplifiers and DACs with integrated battery backup and charge management. IC Role / Device Role / Timing Role: LP3910SQ-AN/NOPB acts as USB power manager: detects USB presence (CHG_DET), limits current (USBISEL), charges battery (1000 mA), and powers analog stage (LDO2 = 2.5 V). Use Value: Supports seamless transition between USB-powered and battery-powered operation without rail collapse or reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | Triple buck + dual LDO; no integrated Li-ion charger; 3-MHz switching frequency; smaller 4×4 mm QFN | Lacks battery charging and ADC; suited for systems with external charger or non-Li-ion batteries | Select when charger integration is unnecessary and higher switching frequency is preferred for compact filter design |
| BQ24150ARHLR | Dedicated single-cell Li-ion charger only; no DC-DC converters or LDOs; 1.5-A max charge current; I²C programmable | Requires external regulators for system rails; targets charge-only use cases | Select when power management is split: BQ24150ARHLR handles charging, while separate PMIC or discrete regulators manage system rails |
Compared with TPS65023RSBR and BQ24150ARHLR, the LP3910SQ-AN/NOPB uniquely integrates full-system PMIC functionality-including buck, buck-boost, dual LDOs, linear charger, ADC, and LED drivers-in one device, eliminating inter-IC communication overhead and reducing PCB area by consolidating 12+ discrete components.
Availability
LP3910SQ-AN/NOPB is available at Aetrix Electronics and suitable for hard drive-based media players, portable navigation devices, portable gaming players, and USB-powered audio accessories requiring stable component supply, long-lifecycle support, and production-ready qualification.
Supply support for LP3910SQ-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 delivering analog, embedded processing, and connectivity solutions with emphasis on power efficiency, reliability, and system integration.
The LP3910SQ-AN/NOPB belongs to TI's portable system PMIC product line, designed specifically for HDD-based consumer electronics requiring tightly coordinated multi-rail power, battery intelligence, and compact form factor.
FAQ
What is the factory-programmed output voltage configuration for LP3910SQ-AN/NOPB?
The LP3910SQ-AN/NOPB is factory-programmed with LDO1 = 1.2 V, LDO2 = 2.5 V, Buck1 = 1.0 V, Buck2 = 1.8 V, Buck-Boost = 3.3 V, and full-rate charge current = 1000 mA. These defaults are confirmed in Table 1 of the SNVS481M datasheet and cannot be altered post-manufacture without I²C reprogramming during system initialization.
Does LP3910SQ-AN/NOPB support USB Battery Charging (BC) 1.2 specification?
No, LP3910SQ-AN/NOPB does not implement USB BC 1.2 enumeration. It supports fixed USB current limits (100/500/800 mA) selected via USBISEL pin and pre-qualification at 50 mA, but lacks D+/D− detection circuitry or SDP/CDP/DCP identification logic required for BC 1.2 compliance.
What is the maximum continuous output current capability of the buck-boost regulator in LP3910SQ-AN/NOPB?
The buck-boost regulator in LP3910SQ-AN/NOPB delivers up to 500 mA continuously at 3.3 V output across the 2.5–4.5 V battery input range. This is confirmed by thermal derating analysis in Section 7.4 (RθJA = 25°C/W) and maximum power dissipation limits (1.6 W at TA = 85°C) in the SNVS481M datasheet.
How is battery temperature measured using the LP3910SQ-AN/NOPB?
LP3910SQ-AN/NOPB measures battery temperature via the TS pin, which connects to an external NTC thermistor. A constant 8 µA current (ITSENSE = 7.75–8.25 µA) is sourced into the thermistor, generating a voltage proportional to resistance. This voltage is digitized by the integrated 8-bit ADC channel, enabling thermal cutoff and charge rate adjustment.
Can LP3910SQ-AN/NOPB operate without an external microcontroller?
No - LP3910SQ-AN/NOPB requires an external I²C host to configure registers, initiate power sequencing, read ADC results, and manage charger state transitions. While it includes POR and basic reset logic (NRST), all functional control (voltage selection, DVS, EOC threshold, LED behavior) depends on I²C commands from a master processor.
LP3910SQ-AN/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-AN/NOPB FAQ
1.How can I place an order for LP3910SQ-AN/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3910SQ-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 LP3910SQ-AN/NOPB reliable?
The price and inventory of LP3910SQ-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 LP3910SQ-AN/NOPB is usually 5 days.
3.What payment methods are accepted for LP3910SQ-AN/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3910SQ-AN/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3910SQ-AN/NOPB?
LP3910SQ-AN/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3910SQ-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 LP3910SQ-AN/NOPB?
For technical support, including LP3910SQ-AN/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3910SQ-AN/NOPB requirements.
6.How does Aetrix verify that LP3910SQ-AN/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3910SQ-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 LP3910SQ-AN/NOPB meets industry standards.
7.What is the process for return or replacement of LP3910SQ-AN/NOPB?
All LP3910SQ-AN/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3910SQ-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 LP3910SQ-AN/NOPB part is unused and in its original packaging.
Return procedure for LP3910SQ-AN/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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