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Analog Devices Inc. LTC1517ES5-3.3#TRPBF
- Part No.:
- LTC1517ES5-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LTC1517ES5-3.3#TRPBF.pdf
- Description:
- IC REG CHARGE PUMP 3.3V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,425
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Product details
Overview
LTC1517ES5-3.3#TRPBF from Analog Devices (formerly Linear Technology) is a micropower regulated 3.3V switched-capacitor DC/DC charge pump converter in a 5-pin SOT-23 package. It delivers ±4% regulated output over 2V–4.4V input, draws only 6µA typical no-load current, supports up to 15mA load at VIN ≥ 2.5V, and operates at 700kHz without inductors-ideal for single-cell Li-ion battery-powered handheld instruments.
For engineers reviewing the LTC1517ES5-3.3#TRPBF datasheet, LTC1517ES5-3.3#TRPBF pinout, LTC1517ES5-3.3#TRPBF application, or LTC1517ES5-3.3#TRPBF equivalent, key selection criteria include ultralow quiescent current, thermal/short-circuit protection, fixed 3.3V regulation with no external feedback, minimal external components (one 0.1µF flying cap + two bypass caps), and SOT-23 footprint compatibility for space-constrained designs.
Technical Context
The LTC1517ES5-3.3#TRPBF implements Burst Mode™ operation using a 2-phase nonoverlapping 700kHz oscillator to control internal charge pump switches. Regulation is achieved via an internal 1.25V reference and resistor divider sensing VOUT, enabling/disabling the pump based on hysteresis thresholds (lower trip point ~3.17V, upper ~3.43V).
It integrates thermal shutdown (trip ~160°C, recovery ~145°C) and survives indefinite VOUT-to-GND short circuits by cycling into/out of shutdown. The device requires no inductors and uses only ceramic capacitors: 0.1µF flying cap (C1), ≥3.3µF low-ESR input (CIN), and ≥3.3µF output (COUT) capacitors for stable 3.3V generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±4% (3.17V–3.43V); tightly regulated across full input range and load conditions without external feedback. |
| No-Load Supply Current | 6µA typical; enables multi-year battery life in always-on, low-duty-cycle sensor nodes. |
| Max Output Current | 15mA at VIN ≥ 2.5V; sufficient for powering low-power microcontrollers, RF transceivers, or analog sensors. |
| Input Voltage Range | 2.0V to 4.4V; supports full discharge curve of single-cell Li-ion (3.0V–4.2V) and alkaline/NiMH (2.0V–3.2V). |
| Switching Frequency | 700kHz typical; enables use of small 0.1µF ceramic flying capacitor and minimizes EMI in sensitive analog sections. |
| Output Ripple | 75mVP-P max (VIN=2.5V, IOUT=8mA, COUT=3.3µF); reduced to <2mVP-P with 6.8µF COUT and optimized layout. |
| Protection Features | Thermal shutdown + continuous short-circuit survival; eliminates need for external current limiting or foldback circuitry. |
Pinout & Package
Package: 5-lead plastic SOT-23 (S5), 2.80–3.00mm × 1.90mm × 1.10–1.30mm, JEDEC SC-74A compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Charge pump input supply | Accepts 2V–4.4V; must be bypassed with ≥3.3µF low-ESR capacitor adjacent to pin for stable operation. |
| GND (Pin 2) | Power ground reference | Primary return path for input, output, and flying capacitor currents; requires low-impedance connection to ground plane. |
| VOUT (Pin 3) | Regulated 3.3V output | Delivers ±4% regulated voltage; requires ≥3.3µF low-ESR bypass capacitor placed close to pin to minimize ripple. |
| C1+ (Pin 4) | Flying capacitor positive terminal | Connects to positive plate of 0.1µF ceramic flying capacitor; carries high-frequency switching current. |
| C1– (Pin 5) | Flying capacitor negative terminal | Connects to negative plate of 0.1µF ceramic flying capacitor; completes charge pump switching loop. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 6µA typical ICC enables >10-year battery life in coin-cell applications with 10µA average load. |
| No-inductor architecture | Eliminates magnetic components, reducing BOM cost, board area (0.045in² total), and EMI concerns. |
| Burst Mode™ regulation | Dynamically enables/disables charge pump to maintain regulation while minimizing idle power dissipation. |
| Integrated thermal protection | Self-recovering shutdown prevents damage during sustained overload or poor heatsinking conditions. |
| SOT-23 footprint compatibility | Enables drop-in replacement for other 5-pin SOT-23 regulators and simplifies PCB layout reuse. |
Applications
| Handheld Medical Sensors | Low-Power IoT Edge Nodes |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, sampling every 5 minutes. IC Role / Device Role / Timing Role: Primary 3.3V regulator supplying ADC, BLE radio, and microcontroller core. Use Value: 6µA no-load current extends battery life beyond 3 years; ±4% regulation ensures consistent ADC reference accuracy across battery discharge. | Use Scenario: Battery-operated environmental sensor node transmitting temperature/humidity data hourly via LoRaWAN. IC Role / Device Role / Timing Role: Main system power rail generator from single Li-SOCl₂ primary cell. Use Value: 2V–4.4V input range accommodates full cell voltage decay (3.6V→2.0V); 15mA peak current supports radio transmit burst without brownout. |
| PCMCIA Card Power | Portable Test Equipment |
Use Scenario: Compact PCMCIA modem card drawing intermittent 10mA loads from host 3.3V bus. IC Role / Device Role / Timing Role: Local 3.3V supply isolating card logic from noisy host bus noise. Use Value: Low 75mVP-P ripple (with 6.8µF COUT) prevents digital noise coupling into analog front-end circuits. | Use Scenario: Handheld multimeter with LCD display and precision op-amps requiring clean 3.3V rails. IC Role / Device Role / Timing Role: Dedicated low-noise 3.3V source for analog signal chain and display controller. Use Value: Thermal shutdown prevents overheating during extended bench use; SOT-23 size allows placement near sensitive analog sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower charge pump regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Fixed 5V output; higher 120µA no-load current; requires 1µF flying cap; no thermal shutdown. | Not suitable for 3.3V systems; higher quiescent current reduces battery life in ultra-low-power apps. | Select only if 5V output and higher load capability (25mA) are required and thermal protection is handled externally. |
| TPS60403DBVR | 3.3V output; 12µA no-load current; 60mA output; integrated soft-start; no short-circuit survival rating. | Higher output current supports more complex peripherals but lacks indefinite short-circuit tolerance. | Prefer when >15mA load or soft-start sequencing is needed; avoid where robust fault handling is critical. |
Compared with MAX680ESA+ and TPS60403DBVR, the LTC1517ES5-3.3#TRPBF uniquely combines 3.3V regulation, 6µA quiescent current, and guaranteed indefinite short-circuit survival in a 5-pin SOT-23-making it optimal for space- and power-constrained medical and industrial sensors.
Availability
LTC1517ES5-3.3#TRPBF is available at Aetrix Electronics and suitable for handheld medical sensors, low-power IoT edge nodes, and portable test equipment requiring stable component supply with long-term lifecycle support.
Supply support for LTC1517ES5-3.3#TRPBF 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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1517ES5-3.3#TRPBF belongs to Linear Technology's legacy micropower DC/DC converter family, designed specifically for ultra-low-quiescent-current, inductorless voltage regulation in battery-powered portable instrumentation and wireless sensor applications.
FAQ
What is the maximum continuous output current of the LTC1517ES5-3.3#TRPBF?
The LTC1517ES5-3.3#TRPBF delivers up to 15mA continuous output current when input voltage is ≥2.5V and ambient temperature is within the extended range (–40°C to 85°C). At lower inputs (≥2.0V), maximum output drops to 8mA. Performance is verified per Electrical Characteristics table with COUT = 6.8µF and C1 = 0.1µF ceramic capacitors.
Does the LTC1517ES5-3.3#TRPBF require external feedback resistors to set its output voltage?
No, the LTC1517ES5-3.3#TRPBF has an internally trimmed 3.3V ±4% output with no external feedback required. The regulation is achieved via a factory-trimmed internal resistor divider and 1.25V reference, eliminating component count and layout sensitivity associated with external resistor networks.
Can the LTC1517ES5-3.3#TRPBF operate from a 1.8V input source?
No, the LTC1517ES5-3.3#TRPBF has a minimum operating input voltage of 2.0V as specified in Absolute Maximum Ratings and Electrical Characteristics. Operation below 2.0V is not guaranteed and may result in loss of regulation or failure to start.
What is the recommended flying capacitor value for the LTC1517ES5-3.3#TRPBF?
The recommended flying capacitor for the LTC1517ES5-3.3#TRPBF is 0.1µF ceramic (X7R or better), placed as close as possible to pins C1+ and C1–. A 0.22µF value may be used for improved efficiency at higher loads, but 0.1µF is optimal for minimizing board area and cost in typical 8–15mA applications.
Is thermal shutdown on the LTC1517ES5-3.3#TRPBF latching or auto-recovering?
The LTC1517ES5-3.3#TRPBF features auto-recovering thermal shutdown: it disables the charge pump when junction temperature exceeds ~160°C and automatically re-enables operation once temperature falls to ~145°C. This allows indefinite cycling during sustained overload without latchup or damage-confirmed in Applications Information section.
LTC1517ES5-3.3#TRPBF 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LTC1517ES5-3.3#TRPBF FAQ
1.How can I place an order for LTC1517ES5-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1517ES5-3.3#TRPBF 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 LTC1517ES5-3.3#TRPBF reliable?
The price and inventory of LTC1517ES5-3.3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1517ES5-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1517ES5-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1517ES5-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1517ES5-3.3#TRPBF?
LTC1517ES5-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1517ES5-3.3#TRPBF 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 LTC1517ES5-3.3#TRPBF?
For technical support, including LTC1517ES5-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1517ES5-3.3#TRPBF requirements.
6.How does Aetrix verify that LTC1517ES5-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1517ES5-3.3#TRPBF 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 LTC1517ES5-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1517ES5-3.3#TRPBF?
All LTC1517ES5-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1517ES5-3.3#TRPBF, 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 LTC1517ES5-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LTC1517ES5-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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