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Texas Instruments LP3910SQ-AA/NOPB
- Part No.:
- LP3910SQ-AA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LP3910SQ-AA/NOPB.pdf
- Description:
- IC PWR MGMT W/CHRGR 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,851
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Product details
Overview
LP3910SQ-AA/NOPB from Texas Instruments is a highly integrated power management IC (PMIC) for HDD-based portable media players, featuring two programmable LDOs (LDO1 = 2 V, LDO2 = 3.3 V), two DVS buck converters (Buck1 = 1.2 V, Buck2 = 3.3 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 serves as the central system power controller in battery-powered consumer audio/video devices with hard-disk storage.
For engineers reviewing the LP3910SQ-AA/NOPB datasheet, LP3910SQ-AA/NOPB pinout, LP3910SQ-AA/NOPB application, or LP3910SQ-AA/NOPB equivalent, this device is selected for multi-rail, thermally constrained portable systems requiring coordinated sequencing, battery monitoring, USB/adapter charging, and analog-sensitive LDO2 supply - especially where I²C-programmable voltage rails and integrated LED status drivers are needed.
Technical Context
The LP3910SQ-AA/NOPB implements a fixed-function, I²C-configurable power architecture with independent enable/control for each regulator and charger stage. Its buck-boost converter supports wide load range operation across battery discharge (2.5–4.5 V input), while LDO2 delivers low-noise analog power with 50 µVRMS output noise and 50 dB PSRR at 1 kHz. The integrated 4-channel ADC monitors battery voltage, temperature (via TS pin), charge current (ISENSE), and auxiliary inputs with ±1 LSB INL/DNL accuracy.
Sequencing is managed via programmable turn-on/turn-off delays (e.g., LDO1/LDO2 = 5 ms on, 10 ms off; Buck-Boost = 25 ms on), and safety features include thermal shutdown (160°C), battery low detection (2.9 V threshold), 10-hour safety timer, reverse-current blocking for USB, and overcurrent protection on all power paths. The device uses a single 400-kHz I²C interface (7-bit address 0x60) for register access and status polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO1 Output Voltage | 2.0 V (factory-programmed default; programmable 1.2–3.3 V in 100-mV steps) |
| LDO2 Output Voltage | 3.3 V (factory-programmed default; programmable 1.3–3.3 V; low-noise analog rail) |
| Buck-Boost Output | 3.3 V (wide-input, wide-load-range DC-DC for system main supply) |
| Charger Full-Rate Current | 100 mA (from wall adapter; USB limits selectable: 100/500/800 mA) |
| Battery Termination Voltage | 4.2 V ±0.35% (factory default; selectable 4.1/4.2/4.38 V with ±1% tolerance) |
| ADC Resolution | 8-bit dual-slope (±1 LSB INL/DNL; channels: VBATT, TS, ISENSE, ADC1/ADC2) |
| I²C Address | 0x60 (7-bit, metal-mask configurable; 400-kHz compatible interface) |
| Package | 48-pin WQFN (6.0 mm × 6.0 mm × 0.8 mm; RθJA = 25°C/W) |
Pinout & Package
LP3910SQ-AA/NOPB is housed in a thermally enhanced 48-pin WQFN (NJV) package measuring 6.0 mm × 6.0 mm × 0.8 mm, with exposed thermal pad for PCB heat dissipation. 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 battery thermal monitoring and charge safety cutoff |
| VBATT1/2/3 | Positive battery terminal | Three parallel pins for low-impedance connection to single-cell Li-ion/Li-poly battery anode |
| LDO2EN | Digital enable input | Active-high control for LDO2; internal weak pulldown ensures safe default-off state |
| VFB1 / VFB2 / VBBFB | Buck1/Buck2/Buck-Boost feedback | Resistive divider inputs for precise output voltage regulation of each switching regulator |
| CHG / STAT | LED status outputs | Open-drain drivers: CHG (red LED, charging active), STAT (green LED, CV/fully charged) |
| IRQB / NRST | Interrupt and reset outputs | Active-low open-drain signals: IRQB (8-source interrupt), NRST (debounced reset during standby) |
| I2C_SDA / I2C_SCL | I²C bidirectional data/clock | 400-kHz compatible interface; supports register read/write, status polling, and configuration updates |
| USBISEL / USBSUSP | USB charge control inputs | Digital inputs selecting USB current limit (100/500/800 mA) and suspend mode behavior |
Key Features
| Feature | Design Value |
|---|---|
| Programmable multi-rail power system | Five regulated outputs (2 LDOs + 2 bucks + 1 buck-boost) with independent enable and I²C-adjustable voltages |
| Integrated Li-ion linear charger | Constant-current/constant-voltage charging with 0.1C end-of-charge, 4.2 V termination, and 10-hour safety timer |
| Thermal and battery safety supervision | On-chip thermal shutdown (160°C), battery low alert (2.9 V), reverse-current blocking, and overcurrent protection |
| System-level monitoring capability | 4-channel 8-bit ADC with dedicated inputs for battery voltage, temperature, charge current, and auxiliary analog signals |
| LED status indication | Dual open-drain outputs (CHG, STAT) drive red/green LEDs with programmable current (10 mA default) |
| Robust I²C interface | 400-kHz compatible bus with 7-bit address (0x60), Schmitt-trigger inputs, and hysteresis for noise immunity |
Applications
| Hard Drive-Based Media Players | Portable Gaming Devices |
|---|---|
Use Scenario: Portable video/audio player with 2.5-inch HDD, ARM-based apps processor, and dual-LCD display. IC Role / Device Role / Timing Role: Central PMIC managing all voltage rails (core, memory, display, audio codec), battery charging, and thermal monitoring. Use Value: Enables coordinated power-up sequencing, extends battery runtime via DVS buck converters, and provides accurate battery fuel gauging via integrated ADC. |
Use Scenario: Handheld gaming console with HDD storage, touch interface, and stereo audio subsystem. IC Role / Device Role / Timing Role: System power controller supplying clean analog voltage (LDO2) to audio DAC, digital rails (Buck1/Buck2) to CPU/GPU, and buck-boost to display backlight. Use Value: Reduces BOM count by integrating charger, ADC, and LED drivers; eliminates external sequencing logic via programmable delays. |
| Portable Navigation Systems | Industrial Portable Data Terminals |
Use Scenario: GPS-enabled vehicle navigation unit with HDD-based map storage, touchscreen, and cellular modem. IC Role / Device Role / Timing Role: Primary power manager delivering stable 3.3 V (Buck-Boost) to RF module, 1.2 V (Buck1) to baseband processor, and 2.0 V (LDO1) to sensor interface. Use Value: Ensures reliable cold-start operation down to 2.5 V battery voltage using wide-input buck-boost; supports USB host charging during field use. |
Use Scenario: Ruggedized handheld terminal used in logistics, with HDD, barcode scanner, and Wi-Fi radio. IC Role / Device Role / Timing Role: Power supervisor providing fault-tolerant charging, battery health monitoring (via TS and ADC), and interrupt-driven low-power states. Use Value: Improves field reliability via thermal interrupt (115°C alert), battery voltage hysteresis (2.9 V low-threshold), and robust ESD protection (±2 kV HBM). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | Triple buck + 2 LDO; no integrated charger or ADC; 400-kHz I²C; 48-pin QFN | Lacks battery management; requires external charger and monitoring circuitry | Choose when system uses external charger IC and needs higher buck efficiency at >500 mA loads |
| LP3907SQX-AK/NOPB | Same family; factory-programmed for LDO1=2.5 V, LDO2=3.0 V, Buck1=1.6 V, Buck2=1.8 V, 100 mA charge current | Optimized for lower-core-voltage processors (e.g., 1.6 V core); identical pinout and feature set | Select when target SoC requires non-default rail voltages but retains same system architecture and layout |
Compared with TPS65023RSBR, LP3910SQ-AA/NOPB integrates charger and ADC - reducing component count and enabling autonomous battery management. Compared with LP3907SQX-AK/NOPB, it delivers higher LDO1/LDO2 voltages suited for legacy media processor I/O domains, without sacrificing compatibility or layout reuse.
Availability
LP3910SQ-AA/NOPB is available at Aetrix Electronics and suitable for hard-drive-based media players, portable gaming consoles, and industrial portable terminals requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for LP3910SQ-AA/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 experience in portable power solutions.
The LP3910 product line was designed specifically for HDD-based portable media platforms, integrating system power control, battery charging, analog sensing, and status indication into a single compact package to simplify design and reduce bill-of-materials cost.
FAQ
What is the factory-programmed output voltage configuration for LP3910SQ-AA/NOPB?
The LP3910SQ-AA/NOPB is factory-programmed with LDO1 = 2.0 V, LDO2 = 3.3 V, Buck1 = 1.2 V, Buck2 = 3.3 V, and Buck-Boost = 3.3 V. Battery termination voltage defaults to 4.2 V, end-of-charge current to 0.1C, and full-rate charge current to 100 mA. These settings are confirmed in Table 3 of the SNVS481M datasheet.
Does LP3910SQ-AA/NOPB support both USB and wall-adapter charging?
Yes, LP3910SQ-AA/NOPB supports dual-source charging: USBPWR input (with selectable 100/500/800 mA limits via USBISEL) and CHG_DET input for wall adapter (4.4–4.6 V detection threshold). It includes reverse-current blocking for USB and automatic source selection based on valid input detection.
How does the LP3910SQ-AA/NOPB manage thermal safety?
LP3910SQ-AA/NOPB incorporates thermal shutdown at 160°C (typical), with 20°C hysteresis, and a programmable thermal interrupt at 115°C. It also regulates internal FET junction temperature during charging and provides continuous battery temperature monitoring via the TS pin and integrated ADC channel.
Can the LP3910SQ-AA/NOPB be used without I²C configuration?
Yes - LP3910SQ-AA/NOPB powers up with factory-programmed defaults and operates autonomously. I²C is optional for dynamic reconfiguration (e.g., voltage adjustment, sequencing delay changes, or status reads). All critical functions - including charging, regulation, and safety monitoring - operate without host intervention.
What is the role of the 4-channel ADC in LP3910SQ-AA/NOPB?
The 4-channel 8-bit dual-slope ADC in LP3910SQ-AA/NOPB measures battery voltage (VBATT), battery temperature (TS), charge current (ISENSE), and one auxiliary input (ADC1). It provides ±1 LSB INL/DNL accuracy and enables real-time fuel gauging, thermal profiling, and charger diagnostics without external components.
LP3910SQ-AA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-AA/NOPB FAQ
1.How can I place an order for LP3910SQ-AA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3910SQ-AA/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-AA/NOPB reliable?
The price and inventory of LP3910SQ-AA/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-AA/NOPB is usually 5 days.
3.What payment methods are accepted for LP3910SQ-AA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3910SQ-AA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3910SQ-AA/NOPB?
LP3910SQ-AA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3910SQ-AA/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-AA/NOPB?
For technical support, including LP3910SQ-AA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3910SQ-AA/NOPB requirements.
6.How does Aetrix verify that LP3910SQ-AA/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3910SQ-AA/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-AA/NOPB meets industry standards.
7.What is the process for return or replacement of LP3910SQ-AA/NOPB?
All LP3910SQ-AA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3910SQ-AA/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-AA/NOPB part is unused and in its original packaging.
Return procedure for LP3910SQ-AA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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