LM2640MTC-ADJ/NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM2640MTC-ADJ/NOPB is a dual synchronous buck controller with integrated LDO in a 28-pin SOIC package. It operates from 5.5 V to 30 V input at 200 kHz using current-mode PWM D-CAP2 control for two adjustable outputs. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- LM2640MTC-ADJ/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $4.0300(MOQ 1)
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM2640MTC-ADJ/NOPB?
- Dual-channel D-CAP2 synchronous buck controller with 200 kHz switching frequency, enabling two independent adjustable output rails from a single 5.5 V to 30 V input bus
- Current-mode PWM control with integrated LDO provides fast transient response and a third low-power linear rail without additional components
- Wide 5.5 V to 30 V input range covers 12 V industrial bus and 24 V telecom bus power systems in a compact 28-pin SOIC package
What is LM2640MTC-ADJ/NOPB used for?
The LM2640MTC-ADJ/NOPB is used in multi-rail point-of-load power systems for industrial controllers, DSPs, and FPGAs where two high-efficiency buck rails plus an LDO standby rail must be derived from a single 12 V or 24 V bus. Its D-CAP2 current-mode control architecture provides excellent load transient response, making it well-suited for dynamic loads such as processor cores and DDR memory. Telecom line cards, test equipment, and motor control boards that require a compact dual-output switching solution with an auxiliary LDO also benefit from this device.
What are the specifications of LM2640MTC-ADJ/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | DUAL SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 30V |
| Input Voltage-Min | 5.5V |
| Input Voltage-Nom | 10V |
| JESD-30 Code | R-PDSO-G28 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 3 |
| Output Current-Max | 5A |
| Output Voltage-Max | 6V |
| Output Voltage-Min | 2.2V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 1mA |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 400kHz |
| Technology | BICMOS |
| Temperature Grade | OTHER |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM2640MTC-ADJ/NOPB datasheet?
LM2640MTC-ADJ/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM2640MTC-ADJ/NOPB?
Compatible alternatives and drop-in replacements for LM2640MTC-ADJ/NOPB:
Switching Controller, Current-mode, 230kHz Switching Freq-Max, BICMOS, PDSO28
Frequently Asked Questions
What switching frequency does the LM2640MTC-ADJ/NOPB operate at, and how does this affect inductor selection?
The LM2640MTC-ADJ/NOPB switches at 200 kHz, which is a moderate frequency that balances switching loss against inductor size. At 200 kHz, inductors in the 10 µH to 47 µH range are typically used for each buck channel, offering a good trade-off between core losses and physical size for industrial power supply designs.
What is the input voltage range of the LM2640MTC-ADJ/NOPB and which bus architectures does it support?
The LM2640MTC-ADJ/NOPB accepts an input voltage from 5.5 V to 30 V, with a nominal application point at 10 V. This range covers the 12 V and 24 V industrial bus architectures as well as 28 V aerospace bus supplies, making it versatile for multi-industry power design without changing the controller IC.
What control mode does the LM2640MTC-ADJ/NOPB use, and what are the benefits of D-CAP2 architecture?
The LM2640MTC-ADJ/NOPB uses current-mode PWM with D-CAP2 (Direct Control with Emulated Current-Mode) control. D-CAP2 provides faster transient response than traditional voltage-mode control, typically recovering to within 1% of regulation within 10 µs to 20 µs after a large load step, and simplifies compensation for both MLCC and electrolytic output capacitor types.
How does the integrated LDO in the LM2640MTC-ADJ/NOPB benefit board-level power design?
The integrated LDO in the LM2640MTC-ADJ/NOPB eliminates the need for a separate linear regulator IC to supply always-on housekeeping circuits, gate drivers, or microcontroller IO banks. This consolidation reduces BOM count by at least 1 IC and associated passives, saving PCB area and reducing total solution cost compared to pairing the dual buck controller with an external LDO.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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