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Texas Instruments LM2773TLX/NOPB
- Part No.:
- LM2773TLX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 9-WFBGA, DSBGA
- Datasheet:
-
LM2773TLX/NOPB.pdf
- Description:
- IC REG CHARGE PUMP PROG 9DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,978
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Product details
Overview
LM2773TLX/NOPB from Texas Instruments is a switched-capacitor step-down regulator delivering selectable 1.8V or 1.6V output at up to 300mA, operating from 2.5V–5.5V input (e.g., single-cell Li-ion), with 10mV output ripple at full load, 75%+ efficiency in 1.8V mode, and spread-spectrum switching to suppress EMI - used in portable DSP, memory, and microprocessor power rails.
For engineers reviewing the LM2773TLX/NOPB datasheet, LM2773TLX/NOPB pinout, LM2773TLX/NOPB application, or LM2773TLX/NOPB equivalent, key selection criteria include its DSBGA-9 package footprint, dual-voltage select via SEL pin, shutdown disconnect functionality, and inductorless design enabling ultra-compact, low-noise DC/DC conversion for space-constrained mobile electronics.
Technical Context
The LM2773TLX/NOPB implements a regulated two-phase charge pump with programmable gain (1x or 2/3x) controlled by input voltage and output mode, enabling efficient regulation across wide VIN and IOUT ranges. Its pre-regulated fixed-frequency (1.15MHz typ.) operation combined with automatic PFM mode below 40mA maintains low ripple and high efficiency simultaneously.
Spread-spectrum modulation distributes switching energy across a frequency band to reduce peak EMI emissions, while internal 350kΩ pull-down resistors on EN and SEL pins simplify logic-level interfacing. Thermal shutdown (150°C typ.) and 500mA current limiting provide robust fault protection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Selectable 1.8V (±2%) or 1.6V (±2%) - precise rail generation for core logic and memory without external feedback. |
| Max Output Current | 300mA continuous - sufficient for low-power DSPs, SRAM, and microcontroller cores in handheld devices. |
| Input Voltage Range | 2.5V to 5.5V - directly compatible with single-cell Li-ion (2.7–4.2V) and USB-powered systems. |
| Output Ripple | 10mV peak-to-peak @ 300mA - enables noise-sensitive analog and RF circuitry without additional LDO post-regulation. |
| Switching Frequency | 1.15MHz typical - allows use of tiny 0402/0603 MLCCs (CIN/COUT/C1/C2), eliminating inductors and reducing solution size. |
| Efficiency | >75% @ 300mA in 1.8V mode - minimizes thermal load and extends battery life in portable applications. |
| Shutdown Current | 0.625µA max - preserves battery charge during system sleep or standby modes. |
Pinout & Package
LM2773TLX/NOPB uses a 0.5mm-pitch, 1.511mm × 1.511mm × 0.6mm DSBGA-9 package (TI package code YZR0009), optimized for ultra-thin portable PCBs with minimal board area and thermal resistance (θJA = 75°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | C2− | Flying capacitor C2 negative terminal - connects to ground-side node of second flying cap; requires low-ESR ceramic placement adjacent to IC. |
| A2 | VOUT | Regulated output voltage node - supplies power to load; must be decoupled with 4.7µF X5R/X7R MLCC per datasheet layout guidelines. |
| A3 | C1+ | Flying capacitor C1 positive terminal - connects to high-side node of first flying cap; critical path for charge transfer; minimize trace inductance. |
| B1 | GND | Power and signal reference ground - requires low-impedance connection to PCB ground plane via multiple vias to ensure stability and low noise. |
| B2 | EN | Enable control input - logic HIGH (≥1.0V) enables regulation; logic LOW (≤0.5V) disables device and disconnects VOUT from VIN. |
| B3 | VIN | Main input supply - accepts 2.5V–5.5V; must be bypassed with 1µF X5R/X7R MLCC placed within 1mm of pin. |
| C1 | SEL | Voltage select input - logic HIGH sets VOUT = 1.6V; logic LOW sets VOUT = 1.8V; internal 350kΩ pull-down ensures default 1.8V on power-up. |
| C2 | C1− | Flying capacitor C1 negative terminal - forms complementary pair with A3; completes charge-transfer loop for first flying cap. |
| C3 | C2+ | Flying capacitor C2 positive terminal - completes second charge-transfer path; symmetric layout with C1 essential for balanced ripple suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates magnetic components and associated EMI, enabling <15mm² total solution size using only four 0402/0603 MLCCs. |
| Spread-spectrum switching | Reduces peak radiated EMI by >10dB compared to fixed-frequency operation - simplifies FCC/CE compliance for handheld products. |
| Auto PFM mode | Switches to pulse-frequency modulation below 40mA load, maintaining <12mV ripple while sustaining >70% efficiency at light loads. |
| Output disconnect in shutdown | Internally isolates VOUT from VIN during EN = LOW, preventing backfeed and enabling true zero-current standby in multi-rail systems. |
| Thermal & current protection | Integrates thermal shutdown (150°C) and 500mA current limit - no external sensing or protection circuitry required for robust field operation. |
Applications
| Mobile Phone Baseband Power | Digital Camera Image Sensor Bias |
|---|---|
|
Use Scenario: Powering baseband processor cores and SRAM in slim smartphones where board space and heat dissipation are constrained. IC Role / Device Role / Timing Role: Primary step-down regulator generating stable 1.8V rail from shared Li-ion battery bus. Use Value: 10mV ripple and spread-spectrum operation prevent interference with cellular RF front-end; DSBGA-9 footprint saves >30% area versus inductor-based alternatives. |
Use Scenario: Supplying clean bias voltage to CMOS image sensors requiring low-noise, tightly regulated 1.6V or 1.8V. IC Role / Device Role / Timing Role: Low-ripple DC/DC converter replacing LDOs to improve efficiency without compromising sensor SNR. Use Value: 75%+ efficiency at 300mA reduces thermal load near optics; auto PFM mode maintains low noise during preview/idle states. |
| Portable Music Player Audio Codec | Wearable Fitness Tracker MCU Core |
|
Use Scenario: Delivering regulated 1.8V to audio DAC/ADC and digital interface logic in battery-powered MP3 players. IC Role / Device Role / Timing Role: Compact, low-EMI power source ensuring clean analog performance and jitter-free I²S timing. Use Value: Inductorless design avoids magnetic coupling into sensitive audio paths; shutdown current <0.625µA extends playback time between charges. |
Use Scenario: Powering ARM Cortex-M0+ MCU cores and BLE radio subsystems in sub-20mm wearable bands. IC Role / Device Role / Timing Role: Single-chip, ultra-small-footprint regulator supporting dynamic voltage scaling between active/sleep modes. Use Value: SEL pin enables firmware-selectable 1.6V (ultra-low-power sleep) or 1.8V (full-performance active) operation without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | Fixed 3.3V output; 60mA max; 1MHz switching; no voltage select or spread spectrum. | Suitable only for low-current, fixed-voltage applications - cannot replace LM2773TLX/NOPB in 1.6V/1.8V or >60mA use cases. | Choose when output voltage and load are fixed and lower than 60mA; avoid for portable processors or variable-rail designs. |
| MAX8815AETE+T | 1.2V–3.3V adjustable output via resistor divider; 250mA max; no spread spectrum; larger 3mm × 3mm TDFN package. | Requires external feedback resistors and occupies 4× more PCB area; higher EMI risk in RF-dense layouts. | Prefer when adjustable output is mandatory and board space is not constrained; LM2773TLX/NOPB offers better EMI control and smaller footprint. |
Compared with TPS60403DBVR and MAX8815AETE+T, LM2773TLX/NOPB uniquely combines dual-voltage select, 300mA capability, ultra-low ripple, and DSBGA-9 packaging - making it the only option meeting strict size, noise, and flexibility requirements for next-gen portable SoC power rails.
Availability
LM2773TLX/NOPB is available at Aetrix Electronics and suitable for mobile phones, digital cameras, portable music players, and wearable fitness trackers requiring stable component supply with consistent DSBGA-9 packaging and TI's long-term production commitment.
Supply support for LM2773TLX/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 high-efficiency DC/DC conversion and portable power solutions.
The LM2773TLX/NOPB belongs to TI's switched-capacitor regulator product line, engineered specifically for ultra-compact, low-noise, inductorless power delivery in battery-powered consumer electronics where PCB area and EMI are critical constraints.
FAQ
What output voltages does the LM2773TLX/NOPB support, and how is selection controlled?
The LM2773TLX/NOPB supports two precise output voltages: 1.8V (±2%) and 1.6V (±2%). Selection is controlled by the logic level on the SEL pin: a logic LOW (≤0.5V) configures 1.8V output, while a logic HIGH (≥1.0V) configures 1.6V output. An internal 350kΩ pull-down resistor ensures default 1.8V operation at power-up if SEL is left unconnected, simplifying design for fixed-voltage applications. This dual-mode capability is built into the LM2773TLX/NOPB silicon and requires no external components.
Does the LM2773TLX/NOPB require external inductors, and what capacitors are mandatory?
No, the LM2773TLX/NOPB is an inductorless switched-capacitor regulator and requires only four external MLCCs: one 1µF input capacitor (CIN), one 4.7µF output capacitor (COUT), and two 1µF flying capacitors (C1 and C2). All must be low-ESR X5R or X7R ceramics in 0402 or 0603 packages - polarized types like tantalum are prohibited due to reverse-bias risk during charge-pump operation. The LM2773TLX/NOPB's architecture eliminates magnetic components entirely, enabling ultra-thin, EMI-quiet designs impossible with traditional buck converters.
How does the LM2773TLX/NOPB manage efficiency across varying load conditions?
The LM2773TLX/NOPB maintains high efficiency across its full 0–300mA load range by automatically switching between fixed-frequency regulation (above ~40mA) and pulse-frequency modulation (PFM) mode (below ~40mA). In 1.8V mode, it achieves >75% efficiency at 300mA and sustains >70% even at light loads. Its 2/3x or 1x charge-pump gain adapts to input voltage to minimize losses - for example, using 2/3x gain when VIN exceeds 3.5V (1.8V mode) to reduce input current. This adaptive behavior is intrinsic to the LM2773TLX/NOPB's control architecture and requires no external configuration.
What protection features are integrated into the LM2773TLX/NOPB?
The LM2773TLX/NOPB integrates thermal shutdown (engages at 150°C, releases at 140°C), output current limiting (500mA typ.), and input overvoltage protection (6.0V absolute max on VIN). It also provides true load disconnect during shutdown - the internal switch opens between VIN and VOUT, preventing backfeed and leakage. These protections are implemented in silicon and require no external components. The LM2773TLX/NOPB's robustness makes it suitable for unattended portable devices where reliability under transient or fault conditions is essential.
Is the LM2773TLX/NOPB RoHS-compliant and qualified for industrial temperature operation?
Yes, the LM2773TLX/NOPB is RoHS-compliant (lead-free SNAGCU ball finish) and rated for operation from –30°C to +85°C ambient temperature, meeting industrial-grade requirements. Its DSBGA-9 package has MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is qualified for reflow up to 260°C. TI guarantees this specification for the LM2773TLX/NOPB across its full production lifecycle, with documentation including IPC/JEDEC J-STD-020 moisture sensitivity and JEDEC JESD22-A108 reliability testing reports available upon request.
LM2773TLX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.6V, 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- 1.15MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-DSBGA
LM2773TLX/NOPB FAQ
1.How can I place an order for LM2773TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2773TLX/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 LM2773TLX/NOPB reliable?
The price and inventory of LM2773TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2773TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2773TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2773TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2773TLX/NOPB?
LM2773TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2773TLX/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 LM2773TLX/NOPB?
For technical support, including LM2773TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2773TLX/NOPB requirements.
6.How does Aetrix verify that LM2773TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2773TLX/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 LM2773TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2773TLX/NOPB?
All LM2773TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2773TLX/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 LM2773TLX/NOPB part is unused and in its original packaging.
Return procedure for LM2773TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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