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Analog Devices Inc. LTC1517CS5-3.3#TRMPBF
- Part No.:
- LTC1517CS5-3.3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LTC1517CS5-3.3#TRMPBF.pdf
- Description:
- IC REG CHARGE PUMP 3.3V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,602
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Product details
Overview
LTC1517CS5-3.3#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower regulated charge pump DC/DC converter delivering 3.3V ±4% output from 2V–4.4V input, with 6µA typical no-load supply current, 700kHz switching frequency, and 8mA output capability at VIN ≥ 2V - designed for single-cell Li-ion battery-powered instrumentation and portable logic supplies.
For engineers reviewing the LTC1517CS5-3.3#TRMPBF datasheet, LTC1517CS5-3.3#TRMPBF pinout, LTC1517CS5-3.3#TRMPBF application, or LTC1517CS5-3.3#TRMPBF equivalent, key selection criteria include ultralow quiescent current, SOT-23-5 footprint constraints, regulated 3.3V output tolerance, thermal/short-circuit protection behavior, and capacitor-based (inductorless) implementation requirements.
Technical Context
The LTC1517CS5-3.3#TRMPBF operates in Burst Mode™ switched-capacitor topology, using internal 2-phase nonoverlapping clocking to charge and stack a 0.1µF flying capacitor (C1) with VIN, then deliver regulated 3.3V output via internal feedback comparator with 1.25V reference and hysteresis-based enable/disable control.
It integrates thermal shutdown (trip ~160°C, re-enable ~145°C), survives indefinite VOUT-to-GND short circuits, and maintains regulation across –40°C to 85°C extended temperature range without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±4% (3.17–3.43V); ensures stable 3.3V logic rail over full input and load range. |
| No-Load Supply Current | 6µA typ (2V–4.4V); enables multi-year battery life in always-on sensor nodes. |
| Max Output Current | 8mA @ VIN ≥ 2V; sufficient for low-power microcontrollers, EEPROMs, and RF transceivers. |
| Switching Frequency | 700kHz typ; allows use of small 0.1µF ceramic flying capacitor and minimizes EMI filtering needs. |
| Input Voltage Range | 2.0V to 4.4V; supports full discharge curve of single Li-ion or Li-polymer cells. |
| Output Ripple | 50mVP-P @ VIN=2.5V, IOUT=15mA, COUT=6.8µF; meets noise budgets for analog sensors and precision ADCs. |
| Package | 5-pin SOT-23 (S5); 2.8mm × 1.9mm footprint ideal for space-constrained handheld PCBs. |
Pinout & Package
Package: 5-Lead Plastic SOT-23 (SC-74A), 2.80–3.00 mm × 1.90 mm × 1.15 mm, thermal resistance θJA = 256°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input voltage supply terminal | Accepts 2V–4.4V; requires ≥3.3µF low-ESR bypass capacitor placed adjacent to pin for stability. |
| GND (Pin 2) | Power ground reference | Must connect directly to low-impedance ground plane to minimize noise coupling into regulation loop. |
| VOUT (Pin 3) | Regulated 3.3V output | Delivers up to 8mA; requires ≥3.3µF low-ESR output capacitor for ripple suppression and transient response. |
| C1+ (Pin 4) | Flying capacitor positive node | Connects to + terminal of 0.1µF ceramic flying capacitor (C1); critical for charge transfer efficiency. |
| C1– (Pin 5) | Flying capacitor negative node | Connects to – terminal of 0.1µF flying capacitor; forms switched-capacitor pumping path with C1+. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 6µA typical ICC enables >10-year battery life in 10µA average-load IoT endpoints. |
| Inductorless architecture | Eliminates magnetic components and EMI concerns; reduces BOM count to only three capacitors. |
| Thermal and short-circuit protection | Self-limiting operation under fault conditions prevents damage during board-level test or field misuse. |
| Small PCB area | 0.045 in² (29 mm²) total layout area supports miniaturized wearables and medical patches. |
| Burst Mode™ regulation | Dynamically enables/disables charge pump to maintain regulation while minimizing idle power loss. |
Applications
| Handheld Medical Sensors | Low-Power Wireless Transceivers |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin-cell battery with 2.0–3.0V discharge profile. IC Role / Device Role / Timing Role: Regulated 3.3V supply for ultra-low-power ADC, Bluetooth LE SoC, and sensor interface ASIC. Use Value: 6µA no-load current extends battery life beyond 24 months; 3.3V ±4% output ensures consistent ADC reference accuracy. | Use Scenario: Sub-GHz ISM band transceiver module operating from single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Primary 3.3V rail for RF front-end, digital baseband, and flash memory programming voltage. Use Value: 8mA output sustains TX burst current; 700kHz switching avoids interference with 868/915MHz bands. |
| Industrial Data Loggers | PCMCIA Card Power Supplies |
Use Scenario: Battery-backed environmental logger deployed in remote locations with -40°C to 85°C ambient range. IC Role / Device Role / Timing Role: Main system supply enabling EEPROM writes, RTC operation, and serial interface during wake cycles. Use Value: Extended temperature rating (-40°C to 85°C) and thermal shutdown ensure reliability in uncontrolled enclosures. | Use Scenario: PCMCIA Type II card requiring isolated 3.3V supply from host 5V bus during hot insertion. IC Role / Device Role / Timing Role: Local 3.3V generation with fast turn-on (<1ms) and reverse-current blocking. Use Value: 1ms VOUT turn-on time meets PCMCIA specification; no-inductor design avoids magnetic coupling to card signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Unregulated 2× charge pump (VOUT ≈ 2×VIN); no internal feedback or voltage regulation. | Suitable only where output voltage variation is acceptable (e.g., LCD bias); not for logic rails. | Select LTC1517CS5-3.3#TRMPBF when precise 3.3V regulation and low quiescent current are required. |
| LTC1516CS5-5#TRMPBF | 5V regulated output version; identical SOT-23-5 package, same 6µA ICC, but higher 20mA output capability. | Used where 5V logic or legacy peripherals require local conversion from Li-ion input. | Choose LTC1517CS5-3.3#TRMPBF specifically for 3.3V systems; LTC1516CS5-5#TRMPBF is not a drop-in replacement due to different output voltage. |
Compared with MAX680ESA+ and LTC1516CS5-5#TRMPBF, the LTC1517CS5-3.3#TRMPBF uniquely delivers tightly regulated 3.3V output with micropower efficiency in the same compact SOT-23-5 footprint - making it the only option among the three for battery-powered 3.3V logic systems requiring long service life and stable voltage.
Availability
LTC1517CS5-3.3#TRMPBF is available at Aetrix Electronics and suitable for handheld instruments, battery-operated equipment, and local power supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for LTC1517CS5-3.3#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 maintains its high-performance analog and power management product lines.
The LTC1517 series was designed specifically for micropower, inductorless 3.3V and 5V generation in space- and energy-constrained portable electronics - emphasizing ultra-low ICC, SOT-23 integration, and robust fault handling.
FAQ
What is the maximum continuous output current of the LTC1517CS5-3.3#TRMPBF?
The LTC1517CS5-3.3#TRMPBF delivers up to 8mA continuous output current when input voltage is ≥2V, and up to 15mA when VIN is ≥2.5V. These values are specified under thermal limits and with recommended 6.8µF output capacitance; sustained 15mA operation requires adequate PCB copper area for heat dissipation.
Does the LTC1517CS5-3.3#TRMPBF require an external shutdown pin or enable signal?
No, the LTC1517CS5-3.3#TRMPBF has no dedicated enable/shutdown pin. It operates continuously when VIN is within 2V–4.4V. To achieve system-level power gating, an external PMOS high-side switch must be placed on the VIN rail, as the device itself lacks active disable functionality.
Can the LTC1517CS5-3.3#TRMPBF be used with input voltages above 4.4V?
No - the absolute maximum VIN rating for the LTC1517CS5-3.3#TRMPBF is 4.4V. Exceeding this risks permanent damage. For inputs up to 5.5V, consider the LTC1516CS5-5#TRMPBF (5V output) or discrete regulator solutions; the LTC1517CS5-3.3#TRMPBF must be protected by a clamp or LDO if upstream voltage exceeds 4.4V.
What is the recommended flying capacitor value for the LTC1517CS5-3.3#TRMPBF?
The datasheet specifies 0.1µF ceramic for the flying capacitor (C1) as optimal for standard operation. A 0.22µF ceramic may be used for improved ripple performance at higher loads, but values below 0.1µF reduce output current capability and regulation margin. Tantalum or electrolytic capacitors are not recommended due to ESR and aging effects.
Is the LTC1517CS5-3.3#TRMPBF RoHS compliant and lead-free?
Yes, the LTC1517CS5-3.3#TRMPBF is RoHS compliant and features lead-free (Pb-free) terminations per JEDEC J-STD-020. The "#TRMPBF" suffix explicitly denotes tape-and-reel packaging with lead-free, halogen-free construction meeting IPC/JEDEC standards for commercial and extended temperature grades.
LTC1517CS5-3.3#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 2V
- Voltage - Input (Max):
- 4.4V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15mA
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LTC1517CS5-3.3#TRMPBF FAQ
1.How can I place an order for LTC1517CS5-3.3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1517CS5-3.3#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 LTC1517CS5-3.3#TRMPBF reliable?
The price and inventory of LTC1517CS5-3.3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1517CS5-3.3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC1517CS5-3.3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1517CS5-3.3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1517CS5-3.3#TRMPBF?
LTC1517CS5-3.3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1517CS5-3.3#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 LTC1517CS5-3.3#TRMPBF?
For technical support, including LTC1517CS5-3.3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1517CS5-3.3#TRMPBF requirements.
6.How does Aetrix verify that LTC1517CS5-3.3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC1517CS5-3.3#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 LTC1517CS5-3.3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC1517CS5-3.3#TRMPBF?
All LTC1517CS5-3.3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1517CS5-3.3#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 LTC1517CS5-3.3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC1517CS5-3.3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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