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Texas Instruments LM2612BBP
- Part No.:
- LM2612BBP
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFBGA
- Datasheet:
-
LM2612BBP.pdf
- Description:
- IC REG BUCK PROG 300MA 10DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,883
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Product details
Overview
LM2612BBP from Texas Instruments is a 400mA (B-grade), pin-programmable, synchronous step-down DC-DC converter in a 10-pin DSBGA package, operating from 2.8V–5.5V input and delivering programmable output voltages of 1.05V, 1.3V, 1.5V or 1.8V with ±2% DC precision in PWM mode. It supports dual-mode operation (PWM/PFM), features internal soft start, current overload protection, and targets ultra-low-voltage MPU/DSP power in space-constrained mobile phones.
For engineers reviewing the LM2612BBP datasheet, LM2612BBP pinout, LM2612BBP application, or LM2612BBP equivalent, key selection considerations include its B-grade 400mA load capability, 600kHz fixed-frequency PWM mode with SYNC input for 500kHz–1MHz synchronization, 150µA typical PFM quiescent current, and absence of UVLO requiring external EN control during power-up.
Technical Context
The LM2612BBP implements a current-mode switching buck architecture with cycle-by-cycle current limiting and internal synchronous rectification using integrated PFET and NFET switches. Its PWM mode uses a ramp-compensated current-sense comparator and oscillator-driven flip-flop to modulate on-time, while PFM mode employs a hysteretic error comparator to regulate by pulse frequency.
Mode selection is controlled exclusively via the SYNC/MODE pin: high (>1.3V) enables 600kHz PWM with synchronous rectification and 91% efficiency at 1.8VOUT/2.8VIN; low (<0.4V) activates PFM with 150µA quiescent current and no synchronous rectifier drive; external 500kHz–1MHz clock applied to SYNC/MODE forces synchronized PWM operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 5.5V - supports single Li-ion cell without external regulation or UVLO circuitry. |
| Max Output Current (B Grade) | 400mA - verified maximum continuous load capability per B-grade specification. |
| Programmable VOUT Options | 1.05V, 1.3V, 1.5V, 1.8V - selected via VID0/VID1 digital inputs; eliminates external feedback resistors. |
| PWM Mode DC Accuracy | ±2% (except 1.05V: ±3%) - ensures stable core voltage for MPUs/DSPs under full-load conditions. |
| PWM Switching Frequency | 600kHz (typ) - fixed frequency reduces EMI interference in RF-sensitive mobile applications. |
| PFM Quiescent Current | 150 µA (typ) - extends battery life during system standby without compromising regulation. |
| Shutdown Current | 0.1 µA (typ) - minimizes battery drain when EN is pulled low to SGND. |
| Thermal Resistance θJA | 170°C/W - defined for 2-layer PCB (0.5/0.5 oz Cu); informs thermal design margin for 400mA loads. |
Pinout & Package
LM2612BBP is housed in a 10-pin Wafer-Level Chip-Scale DSBGA package (1.5mm × 1.5mm, 0.5mm pitch), optimized for ultra-compact mobile designs. The package uses TI's DSBGA technology and requires no external compensation components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback Analog Input | Connects directly to output filter capacitor; sets regulation point via internal DAC-based voltage divider. |
| VID0 / VID1 | Digital Output Voltage Select | Binary-coded inputs selecting 1.05V/1.3V/1.5V/1.8V; default to 1.5V if unconnected. |
| SYNC/MODE | Dual-function Digital Control | High = 600kHz PWM; low = PFM; external 500kHz–1MHz clock = synchronized PWM. |
| EN | CMOS Schmitt Trigger Enable | High ≥2.54V enables operation; low ≤2.00V enters 0.1µA shutdown; must be held low during VIN <2.8V. |
| PGND | Power Ground Return | High-current return path for internal PFET/NFET switches and inductor; separate from analog ground. |
| SW | Switching Node | Connects to inductor; carries peak current up to 850mA; requires layout minimizing parasitic inductance. |
| PVIN | Power Input to PFET | Supplies internal high-side switch; connect to local input ceramic capacitor (10µF). |
| VDD | Analog Supply Input | Bias supply for control circuitry; optional 0.1µF bypass recommended for noisy layouts. |
| SGND | Analog & Control Ground | Reference for FB, VID, SYNC/MODE, EN; must be star-connected to PGND at single point. |
| - | Not Applicable | No pin 10 functional assignment in revised JEDEC-compliant DSBGA pinout; obsolete numbering differs. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-miniature 10-pin DSBGA | 1.5mm × 1.5mm footprint enables integration into ultra-thin mobile phone PCBs with minimal board area. |
| Three external components only | Requires only one 10µH inductor and two ceramic capacitors (10µF + 22µF), reducing BOM count and assembly cost. |
| Internal soft start | Prevents inrush current and output overshoot during enable, eliminating need for external soft-start circuitry. |
| No external compensation required | Internally compensated control loop simplifies design and eliminates stability tuning across load/temperature. |
| Current overload protection | Fixed 850mA peak switch current limit prevents damage during short-circuit or overload events. |
| Overvoltage protection (OVP) | Activates when VOUT exceeds regulation threshold by 30mV in PWM mode, skipping pulses to prevent overvoltage at light loads. |
Applications
| Mobile Phone Core Power | Hand-Held Radio DSP Supply |
|---|---|
Use Scenario: Powers ARM9 or similar low-voltage MPU core in GSM/3G handset during active call or data session. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 1.3V/400mA with 600kHz PWM to minimize RF interference near IF stages. Use Value: Enables direct Li-ion (2.8V–4.2V) powering of core logic without intermediate LDO, improving system efficiency by >15% vs linear regulation. | Use Scenario: Supplies 1.8V to a narrowband FM radio DSP during receive mode with intermittent high-current bursts. IC Role / Device Role / Timing Role: Dual-mode regulator switching between 600kHz PWM (active RX) and PFM (standby scan) via host MCU GPIO. Use Value: Achieves 150µA quiescent current in PFM mode, extending battery runtime by 3.2× versus forced-PWM operation during idle periods. |
| Battery-Powered Medical Sensor | Ultra-Compact IoT Edge Node |
Use Scenario: Provides 1.05V to an ultra-low-power biomedical SoC in wearable ECG patch with coin-cell backup. IC Role / Device Role / Timing Role: Pin-programmed 1.05V output powers digital core; PFM mode maintains regulation down to 8µA load during sleep cycles. Use Value: Eliminates need for external feedback network, saving 2 mm² PCB area and enabling conformal coating over bare DSBGA die. | Use Scenario: Powers BLE 5.0 SoC in sub-10mm³ smart tag during advertising interval and connection bursts. IC Role / Device Role / Timing Role: Synchronous buck delivers 1.5V/300mA peak during TX; SYNC input synchronized to BLE radio clock to avoid intermodulation. Use Value: 91% efficiency at 1.5VOUT/3.3VIN reduces thermal rise to <2°C in sealed enclosure, avoiding derating. |
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 |
|---|---|---|---|
| LM2612ABP | Higher 400mA rated load (A-grade), lower RDSON (370mΩ P-FET), same pinout and feature set. | Preferred for designs requiring guaranteed 400mA across temperature or tighter output ripple. | Select LM2612ABP when full 400mA performance must be ensured over −25°C to +85°C; LM2612BBP suffices for nominal 400mA at room temperature. |
| TPS62231DRVR | 3MHz fixed-frequency PWM, 600mA output, integrated compensation, smaller 2mm × 2mm WSON package. | Lacks PFM mode; higher quiescent current (17µA) but superior light-load efficiency above 1mA. | Choose TPS62231DRVR for higher switching frequency and reduced inductor size where PFM is not required; LM2612BBP remains optimal for ultra-low-quiescent, dual-mode battery life. |
Compared with LM2612ABP, the LM2612BBP trades guaranteed full-temperature 400mA performance for cost-sensitive B-grade qualification, while versus TPS62231DRVR it prioritizes 150µA PFM quiescent current and pin-selectable VOUT over higher frequency and integrated compensation - making LM2612BBP uniquely suited for legacy mobile designs requiring proven dual-mode operation in minimal footprint.
Availability
LM2612BBP is available at Aetrix Electronics and suitable for mobile phone core power, hand-held radio DSP supply, and battery-powered medical sensor applications requiring stable component supply and long-term lifecycle support.
Supply support for LM2612BBP 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, designing and manufacturing analog ICs, embedded processors, and power management solutions for industrial, automotive, and consumer markets.
The LM2612 product line was developed specifically for ultra-low-voltage, space-constrained portable electronics - delivering pin-programmable outputs and dual PWM/PFM modes to maximize battery life in mobile phones and handheld radios.
FAQ
What is the maximum continuous output current supported by the LM2612BBP?
The LM2612BBP is rated for a maximum continuous output current of 400mA under B-grade specifications. This value is confirmed in the Electrical Characteristics table for the LM2612BBP variant, with a typical switch peak current limit of 690mA and absolute maximum of 980mA. Operation at 400mA requires adherence to thermal limits (θJA = 170°C/W) and proper PCB copper area for heat dissipation.
Does the LM2612BBP require external feedback resistors to set the output voltage?
No, the LM2612BBP does not require external feedback resistors. Output voltage is set digitally via the VID0 and VID1 pins, which select among 1.05V, 1.3V, 1.5V, or 1.8V using an internal DAC-based divider network. This eliminates resistor placement, tolerance errors, and board space - a key design simplification confirmed in the DEVICE INFORMATION section and Typical Application Circuit.
How does the SYNC/MODE pin control operating mode in the LM2612BBP?
The SYNC/MODE pin controls three distinct modes: driving it high (>1.3V) enables 600kHz PWM mode with synchronous rectification; pulling it low (<0.4V) activates PFM mode with 150µA quiescent current; applying a 500kHz–1MHz external clock synchronizes PWM operation. These behaviors are explicitly defined in the PIN DESCRIPTION and Operating Mode Selection sections of the SNVS143G datasheet.
What is the purpose of the EN pin on the LM2612BBP, and what are its voltage thresholds?
The EN pin is a CMOS Schmitt trigger enable input that places the LM2612BBP into 0.1µA shutdown mode when pulled low to SGND, and enables normal operation when driven high to VDD. Its positive-going threshold is 2.54V (min) and negative-going threshold is 2.00V (max) at VDD = 3.6V, as specified in the ELECTRICAL CHARACTERISTICS table. EN must be held low during power-up until VIN exceeds 2.8V due to the absence of UVLO circuitry.
Is the LM2612BBP still in active production, or is it obsolete?
The LM2612BBP is marked OBSOLETE in the official Texas Instruments SNVS143G datasheet (revised April 2013). While functional and supported by Aetrix Electronics for legacy design continuity and repair, new designs should consider modern alternatives such as the TPS62231 series. Lifecycle status verification and last-time-buy planning are recommended for production programs relying on LM2612BBP.
LM2612BBP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFBGA
- 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:
- 300mA
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DSBGA
LM2612BBP FAQ
1.How can I place an order for LM2612BBP through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2612BBP 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 LM2612BBP reliable?
The price and inventory of LM2612BBP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2612BBP is usually 5 days.
3.What payment methods are accepted for LM2612BBP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2612BBP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2612BBP?
LM2612BBP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2612BBP 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 LM2612BBP?
For technical support, including LM2612BBP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2612BBP requirements.
6.How does Aetrix verify that LM2612BBP is sourced from the original manufacturer or authorized distributors?
All LM2612BBP 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 LM2612BBP meets industry standards.
7.What is the process for return or replacement of LM2612BBP?
All LM2612BBP units undergo pre-shipment inspection (PSI). If there is an issue with LM2612BBP, 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 LM2612BBP part is unused and in its original packaging.
Return procedure for LM2612BBP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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