LTC1877EMS8#TR Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LTC1877EMS8#TR is a synchronous step-down DC-DC converter operating from 2.65 V to 10 V input, delivering 0.8 V to 10 V output at up to 0.6 A. Uses current-mode PWM control in a compact 8-pin MSOP package. Available from stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LTC1877EMS8#TR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide 2.65 V to 10 V input range accommodating single-cell Li-ion, 3.3 V, and 5 V system rails
- Synchronous rectification achieving high efficiency at 0.6 A output for battery-powered designs
- Current-mode PWM control enabling fast transient response and inherent cycle-by-cycle current limiting
- Adjustable output voltage from 0.8 V to 10 V supporting programmable core and I/O supply rails
- Compact 8-pin MSOP package minimizing PCB footprint for space-constrained portable equipment
Applications
The LTC1877EMS8#TR is designed for battery-powered portable devices, handheld instruments, and embedded systems requiring an efficient step-down DC-DC converter from a 2.65 V to 10 V input source. Its synchronous rectification and current-mode PWM control deliver up to 0.6 A at adjustable output voltages, making it suitable for powering MCU cores, DSP I/O rails, and low-power sensor circuits. The small MSOP-8 footprint makes it ideal for compact wearable devices and IoT nodes.
Specifications
| YTEOL | 0 |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE FROM 0.784 V TO 0.816 V |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 10V |
| Input Voltage-Min | 2.65V |
| Input Voltage-Nom | 5V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 1.5A |
| Output Voltage-Nom | 0.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 605kHz |
| Technology | CMOS |
| Temperature Grade | OTHER |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input voltage range and maximum output current of the LTC1877EMS8#TR?
The LTC1877EMS8#TR accepts input voltages from 2.65 V to 10 V and delivers a regulated output from 0.8 V to 10 V at up to 0.6 A continuous output current. This range covers single-cell Li-ion (2.7 V to 4.2 V) through 5 V and 9 V system rails, making it versatile for portable and embedded power supply designs.
How does synchronous rectification in the LTC1877EMS8#TR improve efficiency compared to non-synchronous step-down converters?
The LTC1877EMS8#TR uses an internal synchronous MOSFET to replace the external Schottky diode used in non-synchronous converters, reducing conduction losses by replacing a typical 0.3 V to 0.5 V diode forward voltage drop with a low-resistance FET switch. This can improve efficiency by 5% to 10% at 0.6 A load, extending battery runtime in handheld and wearable devices.
For a 3.3 V to 1.8 V regulation on a compact IoT sensor board, how suitable is the LTC1877EMS8#TR?
The LTC1877EMS8#TR is well-suited for this application: with a 3.3 V input within its 2.65 V to 10 V range and an output set to 1.8 V within its 0.8 V to 10 V adjustable range, it delivers up to 0.6 A in a tiny 8-pin MSOP footprint (approximately 3 mm x 3 mm), making it ideal for compact IoT sensor boards needing an efficient LDO replacement.
What switching frequency does the LTC1877EMS8#TR operate at, and how does it affect external component selection?
The LTC1877EMS8#TR operates at a fixed internal switching frequency of approximately 550 kHz, which allows the use of small surface-mount inductors in the 4.7 µH to 10 µH range and low-profile ceramic output capacitors of 10 µF to 22 µF, reducing the total solution size to under 20 mm² on a typical PCB layout.
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