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Analog Devices Inc. LTC3221EDC-5#TRMPBF
- Part No.:
- LTC3221EDC-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC3221EDC-5#TRMPBF.pdf
- Description:
- IC REG CHARGE PUMP 5V 60MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,115
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Product details
Overview
LTC3221EDC-5#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower regulated charge pump DC/DC converter delivering a fixed 5V ±4% output from 2.7V–5.5V input, supporting up to 60mA load current with 8µA no-load quiescent current and Burst Mode® operation. It operates as a switched-capacitor voltage doubler in battery-powered sensor and portable medical devices requiring compact, inductorless power conversion.
For engineers reviewing the LTC3221EDC-5#TRMPBF datasheet, LTC3221EDC-5#TRMPBF pinout, LTC3221EDC-5#TRMPBF application, or LTC3221EDC-5#TRMPBF equivalent, key selection criteria include input voltage range (2.7V–5.5V), regulated 5V output tolerance (±4%), short-circuit protection (120–240mA), shutdown current (<1µA), and 2mm × 2mm 6-pin DFN package with exposed thermal pad.
Technical Context
The LTC3221EDC-5#TRMPBF uses a controlled-current, hysteresis-based Burst Mode® architecture to regulate output voltage by monitoring VOUT via an internal comparator and selectively charging the flying capacitor (CFLY) only when VOUT drops below the lower threshold. Its switching frequency is fixed at 600kHz, and regulation is achieved without inductors by doubling VIN through capacitor charge transfer.
Shutdown is implemented via an active-low CMOS ⎯S⎯H⎯D⎯N pin with 0.4V low-to-high and 0.8V high-to-low thresholds; asserting it disconnects VOUT from VIN and reduces supply current to <1µA. The device survives indefinite VOUT-to-GND short circuits due to its current-limited ISW stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 5V ±4% - ensures stable logic-level supply for microcontrollers or RF transceivers across full load and temperature range. |
| VIN Range | 2.7V to 5.5V - supports single Li-ion, two alkaline, or USB-powered systems without external LDO pre-regulation. |
| IOUT Max | 60mA - sufficient for low-power sensors, memory backup, or BLE transmitters without derating at 85°C. |
| ICC (No Load) | 8µA typical - enables multi-year battery life in tire pressure monitors or glucose meters with intermittent wake-up. |
| Shutdown Current | <1µA - preserves battery during deep sleep; VOUT is fully disconnected from VIN to prevent leakage paths. |
| Efficiency | 82% at VIN=3V, IOUT=60mA - minimizes thermal rise in sealed enclosures and extends runtime versus linear regulators. |
| Short-Circuit Current | 120–240mA - limits fault power dissipation to safe levels while maintaining robustness against PCB shorts. |
Pinout & Package
The LTC3221EDC-5#TRMPBF is housed in a 2mm × 2mm, 0.75mm profile, 6-pin DFN package with exposed thermal pad (Pin 7) that must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C+ (Pin 1) | Flying capacitor positive terminal | Connects to + side of 1µF ceramic flying capacitor; carries high dv/dt switching current-requires short, low-inductance trace. |
| C– (Pin 2) | Flying capacitor negative terminal | Connects to – side of flying capacitor; polarity-sensitive-must use non-polarized ceramic capacitor only. |
| SHDN (Pin 3) | Active-low shutdown control | Logic low (<0.4V) disables charge pump and disconnects VOUT from VIN; must not float-requires pull-up or MCU GPIO drive. |
| GND (Pin 4) | Analog and power ground reference | Primary ground return; ties to exposed pad (Pin 7) for optimal thermal conduction and noise immunity. |
| VIN (Pin 5) | Input supply connection | Accepts 2.7–5.5V; requires 2.2µF low-ESR ceramic bypass capacitor placed adjacent to pin. |
| VOUT (Pin 6) | Regulated 5V output | Delivers up to 60mA; requires ≥2.2µF low-ESR ceramic output capacitor close to pin to limit ripple to ≤45mVP-P. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 8µA no-load operating current enables >10-year battery life in always-on IoT endpoints with 200mAh coin cells. |
| No-inductor architecture | Eliminates magnetic components and EMI concerns-ideal for space-constrained wearables and implantable diagnostics. |
| Burst Mode® regulation | Dynamically disables internal circuitry between charge cycles, reducing average input current at light loads without sacrificing transient response. |
| Short-circuit protected output | Internally limits output current to 120–240mA during VOUT-to-GND faults, preventing thermal runaway and enabling safe operation in unattended systems. |
| Solution profile <1mm | Total height including 0.75mm package and 0603 capacitors fits within ultra-thin enclosures such as smart cards or hearing aids. |
Applications
| Tire Pressure Monitoring System (TPMS) | Glucose Meter |
|---|---|
Use Scenario: Battery-powered wireless sensor node measuring tire pressure and transmitting data via UWB or BLE at 1–5 minute intervals. IC Role / Device Role / Timing Role: Regulates 5V rail for pressure sensor ASIC and RF transmitter from 2xAA or Li-SOCl₂ primary cell. Use Value: 8µA quiescent current extends 200mAh battery life beyond 5 years; 60mA peak output supports 10ms RF burst transmission. | Use Scenario: Portable handheld diagnostic device performing electrochemical glucose strip analysis with LCD display and USB charging. IC Role / Device Role / Timing Role: Generates stable 5V supply for microcontroller, analog front-end, and display driver from 3.7V Li-ion battery. Use Value: Fixed 5V ±4% output eliminates need for post-regulation LDO; Burst Mode maintains efficiency across standby (1µA) and active (60mA) states. |
| Memory Backup Supply | Low-Power RF Transmitter |
Use Scenario: Industrial PLC retaining SRAM or real-time clock state during main power loss using supercapacitor or backup battery. IC Role / Device Role / Timing Role: Provides regulated 5V hold-up supply from 3.0–3.6V backup source with automatic switchover. Use Value: Shutdown current <1µA minimizes backup energy drain; short-circuit protection prevents catastrophic failure if backup capacitor fails short. | Use Scenario: Sub-GHz ISM band transmitter in smart utility meter sending hourly consumption data over 1km range. IC Role / Device Role / Timing Role: Powers RF power amplifier and crystal oscillator from 3.0–3.6V Li-MnO₂ primary cell. Use Value: 82% efficiency at 60mA reduces thermal stress on sealed meter housing; 2mm × 2mm footprint saves PCB area for antenna layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3204-5 | Higher output current (150mA), larger 3mm × 3mm DFN-10 package, constant-frequency operation instead of Burst Mode. | Supports higher-power RF modules or multi-sensor nodes where 60mA is insufficient. | Select LTC3204-5 only when >60mA continuous load or lower output ripple (25mVP-P) is required; board redesign needed for pin count and footprint. |
| LTC1751-5 | Same 5V output but SOT-23-5 package, 20µA quiescent current, 100mA max output, no shutdown pin. | Used in cost-sensitive, space-constrained designs where shutdown control is unnecessary. | Choose LTC1751-5 for simpler bill-of-materials and lower unit cost if shutdown functionality and ultralow IQ are not critical. |
Compared with LTC3221EDC-5#TRMPBF, LTC3204-5 offers higher current and lower ripple but sacrifices micropower efficiency and compactness, while LTC1751-5 trades off shutdown control and quiescent current for smaller footprint and cost-making LTC3221EDC-5#TRMPBF optimal for battery longevity and minimal PCB area in sensor-class applications.
Availability
LTC3221EDC-5#TRMPBF is available at Aetrix Electronics and suitable for tire pressure monitoring systems, glucose meters, memory backup supplies, and low-power RF transmitters requiring stable component supply with guaranteed long-term sourcing.
Supply support for LTC3221EDC-5#TRMPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and continues to manufacture and support its precision analog and power management portfolio.
The LTC3221EDC-5#TRMPBF belongs to the LTC® micropower charge pump family, designed specifically for ultra-low-power, inductorless DC/DC conversion in battery-operated medical, automotive, and industrial sensing applications.
FAQ
What is the input voltage range supported by the LTC3221EDC-5#TRMPBF?
The LTC3221EDC-5#TRMPBF supports an input voltage range of 2.7V to 5.5V. This allows direct operation from common sources including single-cell Li-ion batteries (3.0–4.2V), two alkaline cells (2.7–3.2V), or USB 5V rails. Operation below 2.7V will disable regulation, and exceeding 5.5V violates absolute maximum ratings and may damage the LTC3221EDC-5#TRMPBF.
Does the LTC3221EDC-5#TRMPBF require external inductors?
No, the LTC3221EDC-5#TRMPBF is a switched-capacitor charge pump and requires no inductors. It uses only three external ceramic capacitors: one 1µF flying capacitor (CFLY) between C+ and C– pins, and two 2.2µF bypass capacitors at VIN and VOUT. This eliminates magnetic components, EMI concerns, and board area typically consumed by inductors-key for miniaturized designs using the LTC3221EDC-5#TRMPBF.
How does the shutdown function work on the LTC3221EDC-5#TRMPBF?
The LTC3221EDC-5#TRMPBF features an active-low SHDN pin (Pin 3) with CMOS-compatible thresholds: logic low (<0.4V) places the device in shutdown, reducing supply current to <1µA and disconnecting VOUT from VIN. During shutdown, the output is effectively isolated, preventing backfeed into the input source. The SHDN pin must never be left floating and should be driven by a microcontroller GPIO or pulled up with a resistor to ensure defined operation of the LTC3221EDC-5#TRMPBF.
What is the maximum continuous output current of the LTC3221EDC-5#TRMPBF?
The LTC3221EDC-5#TRMPBF delivers up to 60mA continuous output current while maintaining 5V ±4% regulation across its specified input range and temperature. At VIN ≥3V, full 60mA is supported; below 3V, output current capability decreases per the datasheet's load vs. VIN curves. Exceeding 60mA causes VOUT to droop outside regulation limits, but the LTC3221EDC-5#TRMPBF remains protected by its current-limited ISW stage and survives indefinite short-circuit conditions.
Can the LTC3221EDC-5#TRMPBF be used with polarized capacitors for the flying capacitor?
No, the LTC3221EDC-5#TRMPBF requires a non-polarized ceramic capacitor for the flying capacitor (CFLY). Because the C+ and C– pins alternate polarity during charge-transfer cycles, using polarized capacitors (e.g., tantalum or aluminum electrolytic) risks reverse-voltage breakdown and catastrophic failure. Only X5R/X7R ceramic capacitors rated for ≥6.3V with ≤1µF value and low ESR are recommended-this requirement is critical to reliable operation of the LTC3221EDC-5#TRMPBF.
LTC3221EDC-5#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 60mA
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
LTC3221EDC-5#TRMPBF FAQ
1.How can I place an order for LTC3221EDC-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3221EDC-5#TRMPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3221EDC-5#TRMPBF reliable?
The price and inventory of LTC3221EDC-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3221EDC-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3221EDC-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3221EDC-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3221EDC-5#TRMPBF?
LTC3221EDC-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3221EDC-5#TRMPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3221EDC-5#TRMPBF?
For technical support, including LTC3221EDC-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3221EDC-5#TRMPBF requirements.
6.How does Aetrix verify that LTC3221EDC-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3221EDC-5#TRMPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3221EDC-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3221EDC-5#TRMPBF?
All LTC3221EDC-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3221EDC-5#TRMPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3221EDC-5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3221EDC-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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