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Texas Instruments LP3919RL-C/NOPB
- Part No.:
- LP3919RL-C/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 49-WFBGA, DSBGA
- Datasheet:
-
LP3919RL-C/NOPB.pdf
- Description:
- IC PMU CDMA W/CHARGER 49USMDXT
- Quantity:
- Payment:
- Shipping:
Inventory:2,371
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Product details
Overview
LP3919RL-C/NOPB from Texas Instruments is a CDMA Power Management Unit (PMU) integrating a Li-Ion battery charger, two buck DC/DC regulators, nine LDOs, a USB transceiver, two comparators, an ADC, and a high-speed serial interface for dynamic voltage and power-state control. It operates across –40°C to +85°C in mobile baseband processor power domains.
For engineers reviewing the LP3919RL-C/NOPB datasheet, LP3919RL-C/NOPB pinout, LP3919RL-C/NOPB application, or LP3919RL-C/NOPB equivalent, key selection factors include integrated CDMA-specific power sequencing, USB 1.1 transceiver compliance, programmable LDO/buck output voltages via serial interface, and DSBGA-49 package compatibility with space-constrained handset designs.
Technical Context
The LP3919RL-C/NOPB implements a dedicated high-speed serial interface (not I²C or SPI) for real-time configuration of regulator on/off states and output voltages, enabling dynamic power domain control in CDMA baseband systems. It integrates analog functions-including ADC, comparators, and USB transceiver-within a single PMU die to reduce external component count.
Its power architecture supports independent control of multiple voltage domains: two buck regulators deliver up to 600 mA each for core logic, while nine LDOs supply noise-sensitive RF, memory, and peripheral blocks at 1.2 V–3.3 V with low dropout and high PSRR. The Li-Ion charger supports AC adapter and USB input sources with thermal regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Regulators | 2 × 600 mA, adjustable 0.8 V–3.3 V outputs for CPU/core power domains |
| LDO Regulators | 9 × low-noise, high-PSRR regulators supporting 1.2 V–3.3 V outputs for RF, memory, and peripherals |
| USB Transceiver | Full-speed USB 1.1 compliant physical layer with integrated termination and differential signaling |
| Li-Ion Charger | Linear charger supporting AC adapter and USB inputs, with thermal foldback and charge status reporting |
| ADC | 10-bit SAR ADC for battery voltage, temperature, and system monitoring |
| Serial Interface | High-speed proprietary serial bus for register-based programming of all regulators and status readback |
| Operating Temp | –40°C to +85°C, qualified for industrial-grade cellular handset environments |
Pinout & Package
LP3919RL-C/NOPB uses a 49-ball DSBGA (Die Size Ball Grid Array) package with 0.5 mm pitch, marked "V10" on top side, moisture sensitivity level 1 (260°C peak reflow), and RoHS-compliant green finish (no Sb/Br).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_BUCK1 | Buck 1 input supply | Connects to main battery or AC adapter input for first buck regulator |
| VOUT_BUCK1 | Buck 1 output | Delivers regulated 0.8–3.3 V at up to 600 mA to core logic or baseband processor |
| VDD_LDO1–LDO9 | LDO input supplies | Each accepts separate or shared input rails; enables independent domain power management |
| VOUT_LDO1–LDO9 | LDO outputs | Individually programmable outputs for RF bias, memory I/O, USB PHY, and peripheral interfaces |
| USBDP/USBDM | USB differential pair | Direct connection to USB connector; no external termination required |
| VBAT | Li-Ion battery sense | Analog input to internal ADC for battery voltage monitoring and charge state estimation |
| SCLK/SI/SO | Serial interface signals | Three-wire high-speed bus for configuring regulators and reading fault/status registers |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB 1.1 Transceiver | Eliminates need for external USB PHY, reducing BOM count and PCB area in CDMA handsets |
| Programmable Buck/LDO Outputs | Enables dynamic voltage scaling and power-state transitions via serial interface without firmware changes |
| Dedicated Li-Ion Charging Path | Supports dual-input charging (AC adapter + USB) with automatic source selection and thermal foldback |
| Multi-Domain Power Sequencing | Hardware-assisted startup/shutdown sequencing across 11 regulated outputs ensures reliable baseband processor boot |
| On-Chip 10-bit ADC | Monitors battery voltage, die temperature, and system supply rails without external sensing components |
Applications
| CDMA Handset Baseband Power | Mobile Phone Battery Management |
|---|---|
Use Scenario: Powering Qualcomm MSM6xxx-series CDMA baseband processors requiring tightly sequenced, low-noise voltage domains. IC Role / Device Role / Timing Role: Central PMU managing buck/LDO outputs, USB PHY interface, and battery charging under serial command from baseband processor. Use Value: Reduces discrete power component count by >12 devices while maintaining CDMA-specific timing margins and thermal safety. | Use Scenario: Managing Li-Ion battery charge/discharge cycles, voltage monitoring, and system brownout protection in slim-profile handsets. IC Role / Device Role / Timing Role: Single-chip battery interface handling AC/USB input arbitration, charge current control, and real-time voltage/temperature telemetry. Use Value: Enables accurate fuel-gauge support and safe fast-charge operation without external ADC or charge controller IC. |
| RF Front-End Biasing | Memory & Peripheral I/O Supply |
Use Scenario: Providing ultra-low-noise, high-PSRR bias for CDMA PA drivers, LNAs, and RF synthesizers. IC Role / Device Role / Timing Role: Nine independent LDOs deliver isolated, ripple-free 1.8 V/2.8 V/3.3 V rails synchronized to RF transmit/receive events. Use Value: Improves EVM and adjacent channel leakage ratio (ACLR) by suppressing switching noise coupling into sensitive RF paths. | Use Scenario: Supplying DDR SDRAM, flash memory, camera modules, and keypad controllers with matched voltage tracking and fast transient response. IC Role / Device Role / Timing Role: LDOs configured in tracking or independent modes to meet JEDEC memory VDDQ/VDD requirements and peripheral wake-up timing. Use Value: Eliminates need for external tracking controllers or discrete LDO arrays, simplifying layout and improving power-up reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP3920RL-C/NOPB | Same DSBGA-49 package and serial interface, but adds integrated real-time clock (RTC) and removes one LDO | Targeted at feature phones requiring timekeeping; not drop-in due to LDO count reduction and RTC pin allocation | Select when RTC functionality is required and LDO count can be reduced from 9 to 8 |
| TPS65023RSBR | 3 buck + 5 LDO + USB transceiver, different serial protocol (I²C), 48-QFN package | Designed for OMAP-based smartphones; lacks CDMA-specific power sequencing and Li-Ion charger integration | Consider for non-CDMA platforms where I²C control and higher buck count outweigh PMU specialization |
Compared with LP3919RL-C/NOPB, LP3920RL-C/NOPB trades one LDO for RTC capability in identical packaging, while TPS65023RSBR offers broader buck/LDO flexibility but requires redesign for I²C control, USB PHY layout, and charger circuitry-making neither a pin-compatible replacement.
Availability
LP3919RL-C/NOPB is available at Aetrix Electronics and suitable for CDMA handset design, mobile battery management systems, and RF front-end power applications requiring stable component supply and long-term lifecycle support.
Supply support for LP3919RL-C/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The LP3919RL-C/NOPB belongs to TI's Power Management Unit product line, engineered specifically for CDMA cellular phone architectures requiring integrated battery charging, multi-rail LDO/buck regulation, USB connectivity, and baseband-processor–centric power sequencing.
FAQ
What is the primary function of the LP3919RL-C/NOPB in a CDMA handset?
The LP3919RL-C/NOPB serves as the central Power Management Unit (PMU) for CDMA handsets, integrating Li-Ion charging, two buck regulators, nine LDOs, a USB 1.1 transceiver, comparators, and an ADC. Its core function is to deliver precisely sequenced, low-noise power to baseband processors, RF sections, memory, and peripherals while enabling dynamic voltage control via its proprietary serial interface. This eliminates the need for multiple discrete power ICs in compact handset designs.
Does the LP3919RL-C/NOPB support both AC adapter and USB charging inputs?
Yes, the LP3919RL-C/NOPB includes a dedicated linear Li-Ion battery charger that supports dual-input sources: AC adapter and USB. It performs automatic input source selection, regulates charge current and voltage, and incorporates thermal foldback to prevent overheating during fast charging. The charger status and battery voltage are accessible via the internal 10-bit ADC and serial interface, enabling full system-level battery management without external components.
Is the LP3919RL-C/NOPB pin-compatible with other variants like LP3919RL-A/NOPB or LP3919RL-B/NOPB?
Yes, LP3919RL-C/NOPB shares identical DSBGA-49 (YPG) packaging, pinout, and electrical specifications with LP3919RL-A/NOPB and LP3919RL-B/NOPB. The only difference is the top-side marking ("V10" vs. "V02" or "V09"), reflecting minor internal calibration or trim variations-not functional or pinout differences. All three variants are interchangeable in PCB layout and system firmware, provided the application's voltage and sequencing requirements align with the C-variant's factory-programmed defaults.
What communication interface does the LP3919RL-C/NOPB use to configure its regulators?
The LP3919RL-C/NOPB uses a proprietary high-speed three-wire serial interface (SCLK, SI, SO) - not I²C or SPI - to configure on/off states, output voltages, and power sequencing parameters for all integrated regulators. This interface allows real-time, register-level control of the 11 regulated outputs and supports status readback including fault flags, battery voltage, and die temperature. Configuration is performed directly by the baseband processor without requiring additional protocol translation hardware.
Can the LP3919RL-C/NOPB be used in non-CDMA applications such as GSM or LTE handsets?
The LP3919RL-C/NOPB was specifically architected for CDMA baseband power requirements, including tight sequencing windows, USB 1.1 transceiver integration, and Li-Ion charging profiles aligned with CDMA RF burst timing. While its buck/LDOs and ADC may function in GSM or LTE designs, lack of support for LTE-specific features (e.g., envelope tracking, advanced sleep modes) and absence of documented qualification for those standards make it unsuitable as a direct replacement. TI recommends platform-specific PMUs like the TPS65950 for LTE or TPS6507x for GSM.
LP3919RL-C/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 49-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Cellular, CDMA
- Current - Supply:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 49-DSBGA
LP3919RL-C/NOPB FAQ
1.How can I place an order for LP3919RL-C/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3919RL-C/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 LP3919RL-C/NOPB reliable?
The price and inventory of LP3919RL-C/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3919RL-C/NOPB is usually 5 days.
3.What payment methods are accepted for LP3919RL-C/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3919RL-C/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3919RL-C/NOPB?
LP3919RL-C/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3919RL-C/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 LP3919RL-C/NOPB?
For technical support, including LP3919RL-C/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3919RL-C/NOPB requirements.
6.How does Aetrix verify that LP3919RL-C/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3919RL-C/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 LP3919RL-C/NOPB meets industry standards.
7.What is the process for return or replacement of LP3919RL-C/NOPB?
All LP3919RL-C/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3919RL-C/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 LP3919RL-C/NOPB part is unused and in its original packaging.
Return procedure for LP3919RL-C/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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