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Texas Instruments LM2619ATLX/NOPB
- Part No.:
- LM2619ATLX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFBGA, DSBGA
- Datasheet:
-
LM2619ATLX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 10USMD
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2619ATLX/NOPB from Texas Instruments is a 500-mA, current-mode synchronous buck DC-DC converter in a 10-bump thin DSBGA package, operating from 2.8V to 5.5V input and delivering adjustable 1.5V–3.6V output. It features pin-selectable PWM (600 kHz), PFM (160 µA quiescent), and shutdown (0.02 µA) modes, with internal PFET/NFET switches and external compensation for mobile power rails.
For engineers reviewing the LM2619ATLX/NOPB datasheet, LM2619ATLX/NOPB pinout, LM2619ATLX/NOPB application, or LM2619ATLX/NOPB equivalent, key selection criteria include its sub-miniature DSBGA footprint, ±1% DC feedback voltage precision, 100% duty cycle capability for low-dropout operation, and SYNC/MODE-controlled mode switching for RF-sensitive portable systems.
Technical Context
The LM2619ATLX/NOPB implements a current-mode buck architecture with internal synchronous rectification in PWM mode, using slope-compensated error amplifier feedback and cycle-by-cycle current limiting. Its control loop relies on external compensation via EANEG/EAOUT pins with R-C networks to set dominant pole and zero for stability across load and input variations.
Operating mode is digitally selected via the SYNC/MODE pin: high (>1.3 V) enables fixed-frequency 600 kHz PWM; low (<0.4 V) activates hysteretic PFM; and 500 kHz–1 MHz external clock input forces synchronized PWM. EN pin provides Schmitt-trigger enable/disable with soft-start activation on power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports single Li-ion cell operation without pre-regulation. |
| Output Voltage Range | 1.5 V to 3.6 V - set externally via resistor divider; VFB = 1.50 V ±1%. |
| Max Output Current | 500 mA - achievable in PWM mode with appropriate inductor and thermal layout. |
| Switching Frequency | 600 kHz (PWM typ), syncable 500 kHz–1 MHz - enables compact 10 µH inductors and low-ESR ceramic caps. |
| Quiescent Current | 600 µA (PWM), 160 µA (PFM), 0.02 µA (shutdown) - optimized for battery runtime in multi-mode systems. |
| Efficiency | 96% typ at 3.9 VIN/3.6 VOUT/200 mA - enabled by internal synchronous NFET rectifier. |
| Protection Features | Thermal shutdown (150°C), current limit (810 mA typ), overvoltage protection - ensures robustness under fault conditions. |
Pinout & Package
LM2619ATLX/NOPB uses a 10-bump thin DSBGA (YPA) package with 0.5-mm pitch, requiring fine-pitch PCB design and precision assembly. Package dimensions are 1.5 mm × 1.5 mm × 0.55 mm (height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback analog input | Connects to resistor divider midpoint; regulates output by comparing to 1.50 V reference. |
| EANEG | Inverting input of error amplifier | Accepts external compensation network (R-C) to stabilize control loop across operating conditions. |
| EAOUT | Error amplifier output | Drives compensation network; open-loop gain >20,000 enables precise loop shaping. |
| SYNC/MODE | Digital mode selection & sync input | High = 600 kHz PWM; low = PFM; external clock = synchronized PWM - eliminates frequency beating in RF systems. |
| EN | Enable/Schmitt trigger input | Low = shutdown (0.02 µA); high = active; internal soft-start prevents inrush during turn-on. |
| PGND | Power ground return | Separate from SGND; carries high di/dt switch currents - must be routed with low-inductance path to SW/PVIN. |
| SW | Switching node | Connects internal PFET drain and NFET source; drives external inductor - requires tight layout to minimize EMI. |
| PVIN | Power input to PFET | Supplies high-side switch; connect directly to input capacitor - minimizes voltage drop under peak load. |
| VDD | Analog supply input | Bias for control circuitry; optional 0.1 µF bypass recommended if board layout is non-ideal. |
| SGND | Analog/control ground | Reference for FB, EAOUT, EANEG, EN, SYNC/MODE - isolate from PGND to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Internal NFET replaces external Schottky diode, reducing conduction loss and improving efficiency at low VOUT. |
| External compensation | Configurable loop dynamics via EANEG/EAOUT pins - allows optimization for specific COUT, L, and load transient requirements. |
| 100% duty cycle operation | Enables lowest possible dropout - output tracks input down to VIN − IOUT(RDC + RDS(ON)_P) without regulation loss. |
| Overvoltage protection | Activates when VOUT exceeds regulation threshold by ~100 mV - prevents damage during light-load PWM operation. |
| Thermal shutdown | Turns off output at 150°C junction temperature; resumes with soft-start after cooling to 130°C - protects against sustained overload. |
Applications
| Mobile Phone Power Rail | Hand-Held Radio Core Supply |
|---|---|
Use Scenario: Powers baseband processor and RF transceiver ICs in dual-mode GSM/EDGE handsets operating from single Li-ion cell. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.8 V or 2.5 V core voltage with dynamic mode switching between active (PWM) and standby (PFM). Use Value: Extends talk time via 160 µA PFM quiescent current and maintains RF integrity with 600 kHz fixed-frequency PWM during transmission bursts. | Use Scenario: Supplies 3.3 V logic and 1.5 V analog sections in portable UHF transceivers with intermittent transmit duty cycles. IC Role / Device Role / Timing Role: Synchronous buck converter enabling fast load transient response and low-noise operation during receive mode via PFM, while supporting full 500 mA peak during transmit. Use Value: Achieves 96% efficiency at 200 mA and suppresses switching noise coupling into sensitive IF stages through SYNC/MODE-controlled frequency alignment. |
| Wireless LAN Card Voltage Regulator | RF PC Card Bias Supply |
Use Scenario: Generates 1.5 V or 2.5 V for WLAN MAC/baseband SoC in mini-PCI Express cards with strict board area constraints. IC Role / Device Role / Timing Role: Compact DSBGA DC-DC converter providing regulated rail with external resistor-set output and programmable mode control via host controller GPIO. Use Value: Enables 0.58 in² total solution size and supports rapid power-state transitions (active ↔ sleep) without output overshoot due to integrated soft-start. | Use Scenario: Delivers clean 3.6 V supply to RF front-end modules in PCMCIA-format cellular data cards operating from 3.3–5.5 V host bus. IC Role / Device Role / Timing Role: High-efficiency buck regulator with 100% duty cycle capability to maintain regulation as input decays near end-of-charge. Use Value: Maintains stable output down to 2.8 V input while delivering 500 mA, eliminating need for backup LDO and reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3-MHz fixed-frequency PWM, 300-mA output, 1.8–6.5-V input, integrated compensation | Higher switching frequency enables smaller inductors but lower max current; no PFM mode | Choose for space-constrained designs needing higher fSW and simpler layout, where 300 mA suffices and continuous low-noise PWM is preferred over PFM battery savings. |
| MAX8640YETA+ | 2.5-MHz PWM-only, 600-mA output, 2.6–5.5-V input, internal compensation, 1.2–3.3-V output | No PFM or shutdown modes; tighter output voltage range; higher max current | Choose when higher output current and faster transient response are required, and system-level power management handles low-power states externally. |
Compared with TPS62231DRVR and MAX8640YETA+, the LM2619ATLX/NOPB uniquely balances ultra-low quiescent current in PFM mode (160 µA), 500 mA capability, and pin-selectable operation - making it optimal for battery-powered RF devices requiring both high efficiency at load and minimal standby drain.
Availability
LM2619ATLX/NOPB is available at Aetrix Electronics and suitable for mobile phones, hand-held radios, wireless LAN cards, and RF PC cards requiring stable component supply, long-term lifecycle support, and consistent DSBGA packaging for high-volume portable manufacturing.
Supply support for LM2619ATLX/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 digital signal solutions for industrial, automotive, and consumer markets.
The LM2619ATLX/NOPB belongs to TI's portable power management portfolio, designed specifically for space- and battery-life-critical RF handheld devices powered by single Li-ion cells.
FAQ
What input voltage range does the LM2619ATLX/NOPB support?
The LM2619ATLX/NOPB operates from 2.8 V to 5.5 V, making it ideal for direct connection to a single Li-ion battery across its full discharge curve. This range ensures reliable startup above 2.8 V and continued regulation up to 5.5 V, including during charging. The device incorporates undervoltage lockout and requires EN to be held low until VIN exceeds 2.8 V to prevent erratic behavior during power-up.
How is output voltage set on the LM2619ATLX/NOPB?
The LM2619ATLX/NOPB uses an external resistor divider connected to the FB pin to set output voltage, based on the internal 1.50 V ±1% reference. The formula is VOUT = 1.50 V × (1 + R1/R2), where R2 should pass ≥100× the FB bias current (typically ≥100 kΩ). Example: For 2.5 V output, R1 = 22.1 kΩ and R2 = 33.2 kΩ yields 1.50 × (1 + 22.1/33.2) ≈ 2.50 V.
What are the three operating modes of the LM2619ATLX/NOPB and how are they selected?
The LM2619ATLX/NOPB offers PWM (600 kHz), PFM (low-quiescent), and shutdown modes, all controlled via the SYNC/MODE and EN pins. SYNC/MODE high (>1.3 V) selects PWM; low (<0.4 V) selects PFM; and a 500 kHz–1 MHz external clock selects synchronized PWM. EN low disables the device entirely, drawing only 0.02 µA. Mode transitions must use fast-slew digital signals to avoid indeterminate states.
Does the LM2619ATLX/NOPB require an external Schottky diode?
No, the LM2619ATLX/NOPB does not require an external Schottky diode because it integrates a synchronous NFET rectifier that replaces the diode in PWM mode. The NFET's intrinsic body diode conducts briefly before turn-on, eliminating reverse-recovery losses. An external diode like MBRM120 is optional only for further efficiency gains at very light loads or specific thermal trade-offs - not for basic functionality.
What package type and size does the LM2619ATLX/NOPB use?
The LM2619ATLX/NOPB uses a 10-bump thin DSBGA (YPA) package measuring 1.5 mm × 1.5 mm × 0.55 mm, with 0.5-mm bump pitch. This chip-scale package delivers the smallest possible footprint for space-constrained portable designs. Implementation requires careful PCB layout, including separate SGND/PGND planes, short high-current paths, and precision reflow profiling to ensure reliable solder joint formation on fine-pitch bumps.
LM2619ATLX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 500mA
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TµSMD (2.25x2.5)
LM2619ATLX/NOPB FAQ
1.How can I place an order for LM2619ATLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2619ATLX/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 LM2619ATLX/NOPB reliable?
The price and inventory of LM2619ATLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2619ATLX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2619ATLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2619ATLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2619ATLX/NOPB?
LM2619ATLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2619ATLX/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 LM2619ATLX/NOPB?
For technical support, including LM2619ATLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2619ATLX/NOPB requirements.
6.How does Aetrix verify that LM2619ATLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2619ATLX/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 LM2619ATLX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2619ATLX/NOPB?
All LM2619ATLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2619ATLX/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 LM2619ATLX/NOPB part is unused and in its original packaging.
Return procedure for LM2619ATLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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