LTC3531EDD-3.3#PBF Analog Devices Integrated Circuit (Small Outline No-lead) In Stock
Analog Devices LTC3531EDD-3.3#PBF is a 200mA synchronous buck-boost DC/DC converter with 1.8V to 5.5V input range, fixed 3.3V output, and compact 3x3 DFN-8 package for space-constrained portable applications.
- Manufacturer
- Analog Devices
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LTC3531EDD-3.3#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.7100(MOQ 3)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 200mA synchronous buck-boost topology maintains regulated 3.3V output across 1.8V–5.5V input range, including through-the-rail transitions
- Ultralow quiescent current extends battery life in portable IoT and wearable designs
- Compact 3×3 mm DFN-8 package enables tight PCB layouts in handheld and space-constrained applications
- Fixed 3.3V output simplifies BOM and eliminates external feedback resistors
Applications
The LTC3531EDD-3.3#PBF is well suited for battery-powered portable devices such as smartphones, wearables, and IoT sensor nodes that require a stable 3.3V rail from a Li-Ion or AA cell. Its buck-boost operation ensures regulation when the battery voltage is above, equal to, or below the 3.3V output, making it ideal for designs that must operate across the full discharge curve of a 1-cell lithium battery.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1698 |
| YTEOL | 10 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 1.8V |
| Input Voltage-Nom | 3.6V |
| JESD-30 Code | S-PDSO-N8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.46A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LTC3531EDD-3.3#PBF support, and why does that matter for battery-powered designs?
The LTC3531EDD-3.3#PBF accepts inputs from 1.8V to 5.5V, covering the full discharge range of a single-cell Li-Ion battery (4.2V down to ~2.5V) as well as two-AA-cell packs. Its synchronous buck-boost topology keeps the 3.3V output regulated even when VIN equals VOUT, eliminating dropouts during the mid-battery phase.
How much output current can the LTC3531EDD-3.3#PBF deliver, and what applications benefit from this current level?
The converter delivers up to 200mA of continuous output current at 3.3V, which is sufficient to power microcontrollers, Bluetooth Low Energy SoCs, small OLED displays, and sensor modules in portable consumer electronics and industrial handheld instruments.
What are the key package dimensions of the LTC3531EDD-3.3#PBF, and how does its footprint compare to larger SOIC alternatives?
The LTC3531EDD-3.3#PBF is housed in a 3×3 mm DFN-8 package with an exposed pad for thermal and ground connections, significantly smaller than a standard 8-pin SOIC footprint of approximately 5×4 mm, saving over 50% board area in wearable PCB layouts.
When is the LTC3531EDD-3.3#PBF preferred over a simple LDO regulator in a 3.3V power rail design?
Unlike an LDO, the LTC3531EDD-3.3#PBF maintains 3.3V output even when the input voltage drops below 3.3V, for example below 3.0V on an aging Li-Ion cell, because its buck-boost topology operates across the full 1.8V–5.5V input range.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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