LTC3240EDC-3.3 Analog Devices Integrated Circuit (Small Outline No-lead) In Stock
LTC3240EDC-3.3 is a switched-capacitor charge pump DC/DC converter providing a fixed 3.3 V regulated output from an input range of 1.8 V to 5.5 V, supporting both step-up and step-down operation. It delivers up to 0.45 A output current in a compact 6-pin SOT-23 package. Ideal for battery-powered portable devices, IoT nodes, and low-power embedded systems requiring a stable 3.3 V rail.
- Manufacturer
- Analog Devices
- Package
- Small Outline No-lead
- Pin Count
- 7
- Lifecycle
- OBSOLETE
- Datasheet
- LTC3240EDC-3.3 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
- Fixed 3.3 V regulated output from 1.8 V to 5.5 V input range
- Supports both step-up and step-down operation without inductors
- Up to 0.45 A output current from a charge pump topology
- Ultra-compact 6-pin SOT-23 (S-PDSO-N6) package for space-constrained designs
- Switched-capacitor design eliminates magnetic EMI from inductors
- Wide input range covers single-cell Li-Ion and two-cell alkaline battery stacks
Applications
The LTC3240EDC-3.3 is designed for portable consumer electronics, wearable devices, and IoT sensor nodes where the battery voltage may vary above or below the required 3.3 V output throughout its discharge cycle. Its inductorless charge pump topology minimizes PCB footprint and eliminates inductive noise, making it attractive for compact, noise-sensitive wireless modules and medical wearables. The device also suits RFID reader power stages and handheld instruments operating from single-cell Li-Ion or dual alkaline battery packs.
Specifications
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHED CAPACITOR REGULATOR |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 1.8V |
| Input Voltage-Nom | 2.4V |
| JESD-30 Code | S-PDSO-N6 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 0.45A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 235 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | DOUBLER INVERTER |
| Switching Frequency-Max | 1800kHz |
| Technology | CMOS |
| Temperature Grade | OTHER |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 20 |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Can the LTC3240EDC-3.3 regulate a 3.3 V output from a single-cell Li-Ion battery throughout its full discharge range?
Yes, the LTC3240EDC-3.3 accepts input voltages from 1.8 V to 5.5 V, which covers the full discharge range of a single-cell Li-Ion battery from approximately 4.2 V (fully charged) down to about 2.7 V near depletion. The charge pump can both step down from 4.2 V and step up from lower voltages to maintain the regulated 3.3 V output, extending usable battery runtime compared to simple LDO-only solutions.
How much output current can the LTC3240EDC-3.3 supply, and is 450 mA sufficient for a typical wireless sensor node?
The LTC3240EDC-3.3 provides up to 0.45 A (450 mA) maximum output current, which is sufficient for most low-power wireless sensor nodes using protocols such as Bluetooth Low Energy or Zigbee that draw peak currents typically in the range of 10 mA to 100 mA during radio transmission. For applications with higher peak demands such as Wi-Fi modules drawing 300 mA to 400 mA, the 450 mA rating provides adequate margin at nominal operating conditions.
Why choose an inductorless charge pump like the LTC3240EDC-3.3 over an inductor-based buck-boost for a noise-sensitive design?
The LTC3240EDC-3.3 uses a switched-capacitor charge pump topology that requires no inductors, eliminating the magnetic field emissions that inductor-based converters generate and which can interfere with nearby RF circuitry or sensitive analog sensors. In a 6-pin SOT-23 package measuring just a few square millimeters, the total solution size with two small flying capacitors is significantly smaller than an inductor-based design, making it well-suited for medical wearables and wireless sensor nodes requiring low EMI.
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