LM1770TMF Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LM1770TMF is a voltage-mode synchronous buck controller using pulse width modulation with 2.8V to 5.5V input voltage range. It operates in a compact SOT-23-5 package for space-constrained designs. Ideal for low-voltage point-of-load power conversion in portable and embedded applications.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- LM1770TMF Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM1770TMF?
- Voltage-mode PWM synchronous buck controller with 2.8V to 5.5V input voltage range
- Compact SOT-23-5 package enabling high-density PCB layouts for portable designs
- Pulse width modulation control for efficient DC-DC step-down conversion
- Low input voltage operation down to 2.8V for battery-powered systems
- Synchronous rectification topology for improved power conversion efficiency
What is LM1770TMF used for?
The LM1770TMF is designed for low-voltage synchronous buck power conversion in handheld devices, IoT sensors, and portable instrumentation powered from 3.3V or 5V rails. Its compact SOT-23-5 form factor makes it ideal for space-constrained PCB designs in wearables and embedded modules. The PWM control architecture supports stable regulation across varying load conditions in point-of-load converter applications.
What are the specifications of LM1770TMF?
| Pbfree Code | No |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.8V |
| Input Voltage-Nom | 3.3V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 1000kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM1770TMF datasheet?
LM1770TMF Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM1770TMF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LM1770TMF support and how does it fit 3.3V system designs?
The LM1770TMF accepts input voltages from 2.8V to 5.5V, with a nominal 3.3V operating point. This range covers single-cell Li-Ion battery voltages and standard logic supply rails, making it compatible with low-power embedded systems, IoT nodes, and portable instruments requiring efficient point-of-load regulation.
In which package does the LM1770TMF come and how does it benefit compact PCB layouts?
The LM1770TMF is housed in a 5-pin SOT-23 package measuring approximately 1.6 mm x 2.9 mm. This miniature footprint allows placement in very tight PCB areas alongside inductors and capacitors, supporting high-density power supply designs in wearables, handheld meters, and compact embedded modules with limited board space.
What control technique does the LM1770TMF use and why does voltage-mode PWM benefit power supply stability?
The LM1770TMF uses voltage-mode pulse width modulation (PWM) control, which provides predictable loop compensation and robust output voltage regulation across load transients from 0 mA to full rated current. Voltage-mode control simplifies feedback network design compared to current-mode topologies, reducing component count in 2.8V to 5.5V synchronous buck converters.
When would a designer choose the LM1770TMF over a non-synchronous buck converter for battery-powered equipment?
The LM1770TMF synchronous topology eliminates the external Schottky diode, reducing forward-drop losses by 0.3V to 0.5V compared to non-synchronous converters. This improves efficiency at light loads in battery-powered equipment operating from 2.8V to 5.5V, extending runtime in IoT sensors, wearables, and portable test instruments where every milliwatt matters.
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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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