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Analog Devices Inc. LTC1517CS5-3.3#TRPBF
- Part No.:
- LTC1517CS5-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LTC1517CS5-3.3#TRPBF.pdf
- Description:
- IC REG CHARGE PUMP 3.3V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
LTC1517CS5-3.3#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 output at VIN ≥ 2.5V, and operates at 700kHz with no inductors-ideal for single-cell Li-ion battery-powered handheld instruments.
For engineers reviewing the LTC1517CS5-3.3#TRPBF datasheet, LTC1517CS5-3.3#TRPBF pinout, LTC1517CS5-3.3#TRPBF application, or LTC1517CS5-3.3#TRPBF equivalent, key selection criteria include ultralow quiescent current, SOT-23 footprint constraints, 3.3V regulation tolerance, short-circuit survivability, and capacitor-based design simplicity without magnetics.
Technical Context
The LTC1517CS5-3.3#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 feedback sensing, enabling hysteresis-based on/off control of the flying capacitor (C1) charging cycle.
It integrates thermal shutdown (trip ~160°C, recovery ~145°C) and survives indefinite VOUT-to-GND short circuits while drawing 20–150mA from VIN. The architecture eliminates inductors and relies solely on three external capacitors: 0.1µF flying (C1), ≥3.3µF input bypass (CIN), and ≥3.3µF output (COUT).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±4% (3.17–3.43V), tightly regulated across full input range and load conditions |
| No-Load Input Current | 6µA typical (2V–4.4V), enabling >1-year battery life in µA-level standby systems |
| Max Output Current | 15mA at VIN ≥ 2.5V; sufficient for low-power logic, sensors, and RF bias rails |
| Switching Frequency | 700kHz typical, enabling compact ceramic capacitor selection and predictable EMI profile |
| Input Voltage Range | 2.0V to 4.4V, fully supporting discharge curve of single Li-ion or Li-polymer cells |
| Output Ripple | 75mVP-P max (VIN = 2.5V, IOUT = 8mA, COUT = 3.3µF); reduced to <2mVP-P with 3.3µF + 1µF parallel COUT |
| Short-Circuit Protection | Indefinite VOUT-to-GND short survival with automatic thermal cycling-no latch-up or damage |
Pinout & Package
Package: 5-lead plastic SOT-23 (SC-74A), 2.80–3.00 mm × 1.90 mm × 1.10 mm, surface-mount, RoHS-compliant, tape-and-reel (TRPBF).
| 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 to low-impedance ground plane to minimize noise coupling and thermal resistance |
| VOUT (Pin 3) | Regulated 3.3V output | Delivers up to 15mA; requires ≥3.3µF low-ESR output capacitor for ripple suppression and transient response |
| C1+ (Pin 4) | Flying capacitor positive node | Connects to positive plate of 0.1µF ceramic flying capacitor (C1); critical for charge transfer timing |
| C1– (Pin 5) | Flying capacitor negative node | Connects to negative plate of C1; forms switched-capacitor doubler stage with C1+ and internal switches |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 6µA typical ICC enables multi-year operation from coin cells or primary batteries in always-on sensors |
| No-inductor architecture | Eliminates magnetic components, reducing BOM cost, board area (<0.045 in²), and EMI concerns |
| Burst Mode™ regulation | Hysteresis-controlled on/off switching maintains regulation at light loads without efficiency collapse |
| Thermal and short-circuit robustness | Self-protecting operation under fault conditions-no external circuitry needed for basic reliability |
| SOT-23 footprint compatibility | Standard 5-pin SOT-23 allows drop-in replacement in space-constrained portable PCB layouts |
Applications
| Handheld Test Instruments | PCMCIA Card Power Supplies |
|---|---|
|
Use Scenario: Portable multimeters and oscilloscope probes requiring stable 3.3V rail from a single 3.6V Li-ion cell across full discharge. IC Role / Device Role / Timing Role: Primary regulated DC/DC converter generating clean 3.3V for microcontroller, ADC, and display logic. Use Value: Maintains 3.3V ±4% output down to 2.0V input, extending usable battery life by >25% versus fixed LDO solutions. |
Use Scenario: Providing isolated 3.3V power to PCMCIA Type II cards inserted into laptops or industrial controllers. IC Role / Device Role / Timing Role: Standalone charge pump supplying compliant VCC to card interface logic during hot insertion. Use Value: Survives repeated short-circuit events during card mating/unmating without latch-up or reset. |
| Battery-Backed Real-Time Clocks | Low-Power Wireless Sensor Nodes |
|
Use Scenario: Maintaining RTC and SRAM backup power when main 5V supply fails, using trickle-charged Li coin cell. IC Role / Device Role / Timing Role: Secondary regulated source activated only during main supply loss, minimizing parasitic drain. Use Value: 6µA no-load current ensures >5-year shelf life on BR2032 coin cell with 220mAh capacity. |
Use Scenario: Powering BLE SoC, temperature sensor, and EEPROM in wireless environmental monitors powered by AA alkalines. IC Role / Device Role / Timing Role: Efficient 3.3V generation during brief active bursts (100ms every 2 minutes), then deep sleep. Use Value: Burst Mode™ achieves >85% efficiency at 1mA load, doubling battery runtime versus linear regulators. |
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 ±5V dual-output charge pump; no internal regulation, higher ICC (120µA), requires external feedback for 3.3V | Requires additional components (resistors, op-amp) to achieve 3.3V regulation; larger solution size | Choose only if dual-rail (±V) output is required and regulation precision is secondary |
| TPS60110IDBVR | Regulated 3.3V output, but 100µA typical ICC, 25mA max IOUT, and 1MHz switching frequency | Higher quiescent current reduces battery life in ultra-low-power designs; larger 6-pin SOT-23-6 footprint | Prefer LTC1517CS5-3.3#TRPBF where <10µA ICC and minimal board area are mandatory |
Compared with MAX680ESA+ and TPS60110IDBVR, the LTC1517CS5-3.3#TRPBF uniquely combines sub-10µA quiescent current, ±4% regulation, SOT-23-5 footprint, and fault resilience-making it optimal for space- and energy-constrained single-rail systems where long-term battery autonomy is critical.
Availability
LTC1517CS5-3.3#TRPBF is available at Aetrix Electronics and suitable for handheld instruments, PCMCIA power supplies, and battery-backed RTC modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1517CS5-3.3#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 acquired Linear Technology in 2017 and maintains its high-performance analog IC portfolio, emphasizing precision, power efficiency, and reliability for industrial, automotive, and communications markets.
The LTC1517CS5-3.3#TRPBF belongs to Linear's micropower charge pump family, designed specifically for battery-powered portable electronics needing regulated voltage conversion without inductors or excessive quiescent draw.
FAQ
What is the minimum input voltage required for the LTC1517CS5-3.3#TRPBF to regulate at 3.3V?
The LTC1517CS5-3.3#TRPBF maintains regulation down to 2.0V input across its full operating temperature range. At VIN = 2.0V, it delivers 8mA output current while holding VOUT within 3.17–3.43V (±4%). Below 2.0V, regulation ceases and VOUT drops linearly with VIN.
Can the LTC1517CS5-3.3#TRPBF drive a 15mA load continuously?
Yes-the LTC1517CS5-3.3#TRPBF supports continuous 15mA output when VIN ≥ 2.5V and ambient temperature remains ≤85°C. At VIN = 2.5V and TA = 85°C, output current degrades to ~12mA due to thermal derating; full 15mA is guaranteed at TA = 25°C per datasheet specifications.
Does the LTC1517CS5-3.3#TRPBF require external feedback resistors to set output voltage?
No-the LTC1517CS5-3.3#TRPBF has a factory-trimmed internal feedback network that fixes the regulated output at 3.3V ±4%. No external resistors or compensation components are needed; only three external capacitors (CIN, COUT, C1) are required for operation.
How does thermal protection operate in the LTC1517CS5-3.3#TRPBF during sustained short-circuit conditions?
During a VOUT-to-GND short, the LTC1517CS5-3.3#TRPBF draws 20–150mA from VIN, causing junction temperature to rise. When TJ exceeds ~160°C, internal thermal shutdown disables the charge pump. Once TJ falls to ~145°C, operation resumes-cycling indefinitely without damage or latch-up until the short is removed.
What is the recommended flying capacitor value and type for the LTC1517CS5-3.3#TRPBF?
The datasheet specifies a 0.1µF ceramic capacitor for C1 (flying capacitor), placed between C1+ (Pin 4) and C1– (Pin 5). X7R or C0G dielectrics are preferred for stable capacitance and low ESR; 0.22µF may be used for improved efficiency at higher loads, but 0.1µF is optimal for ultralow-IQ operation in the LTC1517CS5-3.3#TRPBF.
LTC1517CS5-3.3#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LTC1517CS5-3.3#TRPBF FAQ
1.How can I place an order for LTC1517CS5-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1517CS5-3.3#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 LTC1517CS5-3.3#TRPBF reliable?
The price and inventory of LTC1517CS5-3.3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1517CS5-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1517CS5-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1517CS5-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1517CS5-3.3#TRPBF?
LTC1517CS5-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1517CS5-3.3#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 LTC1517CS5-3.3#TRPBF?
For technical support, including LTC1517CS5-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1517CS5-3.3#TRPBF requirements.
6.How does Aetrix verify that LTC1517CS5-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1517CS5-3.3#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 LTC1517CS5-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1517CS5-3.3#TRPBF?
All LTC1517CS5-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1517CS5-3.3#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 LTC1517CS5-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LTC1517CS5-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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