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Texas Instruments LM2612ABL
- Part No.:
- LM2612ABL
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFBGA
- Datasheet:
-
LM2612ABL.pdf
- Description:
- IC REG BUCK PROG 400MA 10DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,415
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Product details
Overview
LM2612ABL from Texas Instruments is a 400mA, pin-programmable step-down DC-DC converter in a 10-pin DSBGA package, operating from 2.8V to 5.5V input and delivering selectable output voltages of 1.05V, 1.3V, 1.5V or 1.8V with ±2% DC precision in PWM mode. It integrates synchronous rectification, supports PWM/PFM dual-mode operation, and is optimized for ultra-low-voltage MPU/DSP power in space-constrained mobile phones.
For engineers reviewing the LM2612ABL datasheet, LM2612ABL pinout, LM2612ABL application, or LM2612ABL equivalent, key selection considerations include its 600kHz fixed-frequency PWM mode with SYNC input (500–1000kHz synchronization range), 160µA typical PFM quiescent current, 0.02µA shutdown current, and VID0/VID1-based output voltage configuration without external resistors.
Technical Context
The LM2612ABL uses a current-mode buck architecture with internal PFET/NFET switches and a 200ns minimum on-time constraint. Its PWM mode employs slope-compensated current sensing and oscillator-synchronized switching, while PFM mode operates hysteretically with zero-crossing detection and no synchronous rectifier activation.
Mode selection is strictly digital via the SYNC/MODE pin: high (>1.3V) enables 600kHz PWM with synchronous rectification; low (<0.4V) enables low-quiescent-current PFM; and externally driven 500–1000kHz clock signals force synchronized PWM operation. Output voltage is set by VID0/VID1 logic levels, referencing an internally trimmed 1.5V feedback node with ±2% tolerance across all four settings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 5.5V - supports direct operation from single Li-ion cell without pre-regulation. |
| Output Voltage Options | 1.05V / 1.3V / 1.5V / 1.8V - selected via VID0/VID1 pins; eliminates external feedback resistors and board redesign. |
| PWM Mode Efficiency | 91% typ. at 100mA, 1.8VOUT, 2.8VIN - enabled by internal synchronous rectification reducing conduction loss. |
| Quiescent Current (PFM) | 160µA typ. - extends battery life during system standby in portable devices. |
| Shutdown Current | 0.02µA typ. - minimizes battery drain when disabled via EN pin. |
| Switching Frequency (PWM) | 468–732kHz - fixed 600kHz nominal with ±22% variation; synchronizable to 500–1000kHz external clock. |
| Peak Switch Current Limit | 510–850mA - protects against overload; includes timed current limit mode (2.5µs off-time) below 0.7VOUT. |
| Feedback Voltage Precision | ±2% - applies to all four output voltage settings, derived from trimmed 1.5V reference and internal DAC divider ratios. |
Pinout & Package
LM2612ABL is housed in a 10-pin wafer-level chip-scale DSBGA package (1.5mm × 1.5mm, 0.5mm pitch), optimized for minimal PCB area in mobile phone applications. External component count is reduced to only one 10µH inductor and two ceramic capacitors (10µF and 22µF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback Analog Input | Connects to output filter capacitor; regulates VOUT by comparing against internal 1.5V reference scaled per VID setting. |
| VID1, VID0 | Digital Output Voltage Select Inputs | Set output to 1.05V (11), 1.3V (10), 1.5V (00 default), or 1.8V (01); pulled to SGND or driven to PVIN. |
| SYNC/MODE | Digital Mode Control & Sync Input | High = 600kHz PWM; low = PFM; 500–1000kHz external clock = synchronized PWM; requires fast slew rate (>5V/100µs). |
| EN | Enable Input | Active-high; drives device into 0.02µA shutdown when low; must be held low until VIN ≥ 2.8V (no UVLO). |
| PGND | Power Ground | Return path for high-current switch node (SW) and PVIN; separate from analog ground (SGND) for noise isolation. |
| SW | Switching Node | Connection point between internal PFET drain and NFET source; drives external inductor; requires low-inductance layout. |
| PVIN | Power Input to PFET | Supplies gate drive and PFET channel; connect directly to input filter capacitor near package. |
| VDD | Analog Supply Input | Bias supply for control circuitry; optional 0.1µF decoupling recommended if layout is suboptimal. |
| SGND | Analog & Control Ground | Reference for FB, VID, SYNC/MODE, EN; must be connected to PGND at single point near device. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-miniature DSBGA package | 10-pin, 1.5mm × 1.5mm footprint - enables integration into ultra-thin mobile handsets with strict board area limits. |
| Pin-selectable output voltage | Four precise settings (1.05V–1.8V) configured solely by VID0/VID1 logic states - eliminates BOM cost and layout risk of external resistor networks. |
| Internal synchronous rectification | Integrated NFET replaces Schottky diode in PWM mode - reduces forward drop and improves efficiency, especially at low VOUT. |
| Three operational modes | PWM (600kHz), PFM (hysteretic), and shutdown - dynamically matches power delivery to load demand, optimizing battery runtime. |
| No external compensation required | Internally compensated error amplifier - simplifies design, removes tuning uncertainty, and ensures stability with specified 10µH/10µF/22µF components. |
| Thermal shutdown & current limiting | Protects against sustained overloads and junction temperatures >125°C - prevents damage during fault conditions or poor thermal design. |
Applications
| Mobile Phone Core Power | Hand-Held Radio DSP Supply |
|---|---|
Use Scenario: Powers baseband processor core in GSM/UMTS smartphones operating from single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1.3V or 1.5V at up to 400mA with dynamic mode switching between active (PWM) and standby (PFM). Use Value: Extends talk time via 160µA PFM quiescent current and maintains RF integrity with 600kHz fixed-frequency PWM during transmission bursts. | Use Scenario: Supplies digital signal processor in compact handheld two-way radios with tight thermal and size constraints. IC Role / Device Role / Timing Role: Low-noise, high-efficiency DC-DC converter providing 1.05V or 1.3V to DSP core, synchronized to system clock via SYNC/MODE pin. Use Value: Enables clean power delivery with <5mV ripple in PWM mode and avoids interference with sensitive IF stages through frequency synchronization. |
| Battery-Powered IoT Sensor Node | Ultra-Low-Voltage MCU System |
Use Scenario: Powers ARM Cortex-M0+ microcontroller and BLE radio in coin-cell or small Li-ion powered sensor nodes. IC Role / Device Role / Timing Role: Dual-mode regulator supplying 1.8V to MCU and 1.05V to analog front-end, entering 0.02µA shutdown between measurement cycles. Use Value: Achieves multi-year battery life by minimizing quiescent consumption in PFM and eliminating leakage during sleep via hard shutdown. | Use Scenario: Provides regulated 1.5V supply to low-power FPGA configuration logic and I/O banks in portable medical devices. IC Role / Device Role / Timing Role: Pin-programmable buck converter delivering stable output despite input sag from aging batteries (2.8–5.5V range). Use Value: Maintains ±2% output accuracy across temperature and load without trimming, ensuring reliable logic-level compatibility and ADC reference stability. |
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 |
|---|---|---|---|
| TPS62231DRYR | 3MHz fixed-frequency PWM, 300mA max, 2.05–6.5V input, 0.6–5.5V adjustable output via resistor divider. | Requires external feedback network; higher switching frequency allows smaller inductors but increases EMI sensitivity. | Preferred when board space permits external resistors and higher-frequency operation is acceptable for faster transient response. |
| MAX8867EUK18+T | 600kHz PWM-only (no PFM), 300mA max, 2.5–5.5V input, fixed 1.8V output, 25µA quiescent current. | Lacks VID programming and mode flexibility; no PFM or shutdown current optimization for ultra-low-power use cases. | Suitable for cost-sensitive, fixed-output applications where lowest quiescent current is not critical and full 400mA capability is unnecessary. |
Compared with TPS62231DRYR and MAX8867EUK18+T, the LM2612ABL uniquely combines pin-selectable outputs, dual PWM/PFM operation, and 400mA capability in a 1.5mm² DSBGA package-making it optimal for space-constrained, battery-life-critical mobile designs requiring flexible voltage rails without external feedback.
Availability
LM2612ABL is available at Aetrix Electronics and suitable for mobile phone core power, handheld radio DSP supply, and battery-powered IoT sensor node applications requiring stable component supply and long-term lifecycle support.
Supply support for LM2612ABL 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 specializing in analog, embedded processing, and power management ICs, with leadership in high-reliability, energy-efficient power conversion solutions.
The LM2612ABL belongs to TI's sub-miniature DC-DC converter product line, designed specifically for ultra-low-voltage, space-constrained portable electronics powered by single Li-ion cells.
FAQ
What output voltage options does the LM2612ABL support, and how are they selected?
The LM2612ABL supports four precise output voltages: 1.05V, 1.3V, 1.5V, and 1.8V. These are selected exclusively via the logic states of the VID0 and VID1 pins - no external resistors are needed. When both pins are unconnected, the device defaults to 1.5V. The LM2612ABL datasheet Table 1 defines the mapping: VID1=HIGH/VID0=HIGH → 1.05V; VID1=HIGH/VID0=LOW → 1.3V; VID1=LOW/VID0=LOW → 1.5V; VID1=LOW/VID0=HIGH → 1.8V. This pin-strapping method ensures consistent, board-level voltage configuration without trimming or rework.
How does the LM2612ABL manage power efficiency across varying load conditions?
The LM2612ABL dynamically optimizes efficiency using three distinct operating modes controlled by the SYNC/MODE pin. In PWM mode (SYNC/MODE high), it delivers up to 400mA at 91% typical efficiency using internal synchronous rectification and fixed 600kHz switching. In PFM mode (SYNC/MODE low), it reduces quiescent current to 160µA typical for light loads, extending battery life. In shutdown mode (EN low), consumption drops to 0.02µA. The LM2612ABL automatically adapts to load demand without external intervention, making it ideal for portable systems with bursty workloads like mobile phones and IoT sensors.
Can the LM2612ABL be synchronized to an external clock, and what are the requirements?
Yes, the LM2612ABL can be synchronized to an external clock applied to the SYNC/MODE pin, forcing PWM operation at frequencies from 500kHz to 1000kHz. The external signal must swing between GND and PVIN, with logic thresholds of 0.4V (low) and 1.3V (high), duty cycle between 30% and 70%, and total period ≤2µs. Clock edges must have fast slew rates (>5V/100µs), and overshoot must stay within ±100mV of GND or PVIN. Improper termination or edge sharpness may cause instability, so RC filtering or impedance-matched cabling is recommended during evaluation. This capability ensures the LM2612ABL avoids interference with sensitive RF or data acquisition circuits.
What protection features are integrated into the LM2612ABL?
The LM2612ABL integrates multiple hardware-level protections: thermal shutdown activates above 125°C junction temperature; cycle-by-cycle current limiting trips at 510–850mA peak switch current; timed current limit (2.5µs forced off-time) engages under severe overload or low-VOUT conditions; overvoltage protection disables PWM pulses if VOUT exceeds regulation by 50mV; and internal soft-start limits inrush current during enable. These functions operate autonomously without software or external components. The LM2612ABL also includes undervoltage lockout mitigation - though it lacks internal UVLO, the EN pin must be held low until VIN reaches 2.8V to ensure safe startup.
Is the LM2612ABL still in production, and what is its package type?
The LM2612ABL is marked as OBSOLETE in its official Texas Instruments documentation (SNVS193D, revised April 2013), indicating it is no longer in active production. However, Aetrix Electronics maintains legacy supply channels for this part to support ongoing maintenance and repair of deployed systems. It is packaged in a 10-pin DSBGA (Die Size Ball Grid Array) measuring 1.5mm × 1.5mm with 0.5mm ball pitch - a wafer-level chip-scale package optimized for minimal PCB area in mobile handsets. Due to its obsolete status, long-term design-in is not recommended; migration paths should be evaluated using TI's current-generation buck converters.
LM2612ABL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.05V, 1.3V, 1.5V, 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 400mA
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DSBGA
LM2612ABL FAQ
1.How can I place an order for LM2612ABL through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2612ABL 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 LM2612ABL reliable?
The price and inventory of LM2612ABL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2612ABL is usually 5 days.
3.What payment methods are accepted for LM2612ABL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2612ABL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2612ABL?
LM2612ABL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2612ABL 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 LM2612ABL?
For technical support, including LM2612ABL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2612ABL requirements.
6.How does Aetrix verify that LM2612ABL is sourced from the original manufacturer or authorized distributors?
All LM2612ABL 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 LM2612ABL meets industry standards.
7.What is the process for return or replacement of LM2612ABL?
All LM2612ABL units undergo pre-shipment inspection (PSI). If there is an issue with LM2612ABL, 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 LM2612ABL part is unused and in its original packaging.
Return procedure for LM2612ABL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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