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Semtech Corporation SC1462ISKTRT
- Part No.:
- SC1462ISKTRT
- Manufacturer:
- Semtech Corporation
- Package:
- SOT-23-6
- Datasheet:
-
SC1462ISKTRT.pdf
- Description:
- IC REG CHARGE PUMP 2VIN SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,308
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Product details
Overview
SC1462ISKTRT from Semtech is a fixed-frequency, high-efficiency charge pump voltage doubler IC designed for low-power battery-operated systems. It operates across 1.65V–5.5V input, delivers up to 80mA output current, features 160kHz switching, 94% typical efficiency at 3.6V/55mA, and integrates short-circuit and over-temperature protection - used in handheld LCD bias supplies and cellular phone auxiliary rails.
For engineers reviewing the SC1462ISKTRT datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range compatibility, ceramic-capacitor support, shutdown current <1μA, dropout voltage behavior vs. load, and SOT-23-6 thermal performance under continuous 80mA operation.
Technical Context
The SC1462ISKTRT implements a two-phase switched-capacitor doubler topology using internal MOSFETs controlled by a 160kHz oscillator. Its soft-start circuitry limits inrush via a 200mA VIN-sourced current until VOUT reaches VIN − 200mV, after which full charge-pump operation begins.
Output regulation relies on fixed-frequency switching and internal switch resistance (RSW ≤ 4.5Ω at 2.5V), with output ripple and dropout governed by external capacitor ESR and values. Thermal shutdown activates at ~140°C junction temperature with 20°C hysteresis, enabling safe cycling during overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.65V to 5.5V - supports single-cell Li-ion, NiMH, and alkaline battery inputs without LDO pre-regulation. |
| Output Current | 80mA max - sufficient for LCD bias, white LED drivers, or low-power analog rails in portable devices. |
| Oscillator Frequency | 160kHz typ - enables use of small 3.3μF ceramic capacitors with minimal EMI impact. |
| Efficiency | 94% at 3.6V/55mA - reduces power loss and thermal stress in space-constrained handheld PCBs. |
| Shutdown Current | <1μA - extends battery life during system sleep modes without external enable control. |
| Thermal Shutdown | 140°C activation with 20°C hysteresis - provides self-recovering fault protection during sustained overload or short circuit. |
| Package | SOT-23-6 - 2.8mm × 2.9mm footprint with exposed pad thermal path (θJA = 230°C/W). |
Pinout & Package
SOT-23-6 package with 0.95mm pitch, 6-pin configuration, and thermal pad on bottom (not electrically connected). Pin 1 marked by dot; pin numbering follows standard SOT-23-6 layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Supply input | Accepts 1.65V–5.5V input; connects directly to battery or main rail; requires local 3.3μF decoupling. |
| 2 GND | Ground reference | Common return for input, output, and internal switches; must be low-impedance connection to thermal pad. |
| 3 C− | Flying capacitor negative terminal | Connects to negative side of 3.3μF flying capacitor; critical for charge transfer phase timing and ESR sensitivity. |
| 4 SHDN | Enable/shutdown control | Logic-high (≥1.6V) disables device; logic-low (≤0.4V) enables; draws <1μA in shutdown. |
| 5 VOUT | Doubled output | Delivers ~2×VIN; regulated by internal charge pump; requires 3.3μF output capacitor for ripple control. |
| 6 C+ | Flying capacitor positive terminal | Connects to positive side of 3.3μF flying capacitor; forms series-charge path with C− during phase 2. |
Key Features
| Feature | Design Value |
|---|---|
| Ceramic capacitor support | Validated with 3.3μF X5R/X7R ceramics - eliminates need for bulky tantalum or electrolytic capacitors. |
| Low quiescent current | 140μA typical at no load (2.5V) - minimizes standby drain in always-on subsystems. |
| Integrated protection | Short-circuit current limit (~200mA) + thermal shutdown (140°C) - prevents damage without external circuitry. |
| Fixed-frequency operation | 160kHz ±40kHz - simplifies EMI filtering and avoids audio-band noise in sensitive analog sections. |
| Soft-start behavior | VIN-sourced 200mA pre-charge until VOUT ≥ VIN − 200mV - eliminates output overshoot and inrush spikes. |
Applications
| Handheld LCD Bias Supply | Cellular Phone Auxiliary Rail |
|---|---|
Use Scenario: Powering segment or graphic LCD panels requiring ~5V–6V from a 2.5V–3.6V Li-ion cell. IC Role / Device Role / Timing Role: Charge pump voltage doubler generating stable, low-noise bias voltage independent of battery discharge curve. Use Value: Enables consistent display contrast across 1.65V–5.5V input range while maintaining <75mV pk-pk ripple at 45mA load. |
Use Scenario: Providing clean 5V supply for camera modules, RF front-end bias, or USB PHY in dual-voltage smartphone architectures. IC Role / Device Role / Timing Role: Secondary regulated rail generator with fast turn-on (<500μs) and automatic recovery from short events. Use Value: Delivers 80mA at 94% efficiency with thermal cycling protection - avoids system reset during transient overloads. |
| Portable Medical Sensor Node | Wireless Remote Control Transmitter |
Use Scenario: Supplying 3.3V–5V to low-power analog front-ends (e.g., ECG amplifiers) in battery-powered wearable monitors. IC Role / Device Role / Timing Role: Low-quiescent, shutdown-controllable voltage booster ensuring >100-hour battery life in intermittent-sampling mode. Use Value: Draws only 140μA at no load and <1μA in shutdown - preserves battery capacity during multi-day idle periods. |
Use Scenario: Generating 5V for infrared LED driver or sub-GHz transceiver IC in coin-cell–powered remotes. IC Role / Device Role / Timing Role: High-efficiency doubler operating down to 1.65V input - extends usable life of CR2032 cells beyond 2.0V cutoff. Use Value: Maintains 80mA capability even at 2.5V input with 91% efficiency - supports burst-mode transmission without brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump doubler applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX682ESA+ | Fixed 2× doubler, 100kHz, 100mA output, wider temp range (−40°C to +125°C), higher quiescent current (250μA) | Preferred for industrial-grade designs requiring extended temperature operation and higher output current margin | Select MAX682ESA+ when ambient exceeds +85°C or when >80mA peak load is required |
| TPS60230RTJR | 2× doubler, 500kHz, 150mA output, integrated soft-start, lower shutdown current (0.1μA), requires different capacitor values | Better suited for compact, high-efficiency designs needing faster transient response and ultra-low shutdown leakage | Select TPS60230RTJR when board space is constrained and sub-μA shutdown is mandatory |
Compared with SC1462ISKTRT, MAX682ESA+ offers higher temperature rating and current headroom but trades off efficiency and quiescent current; TPS60230RTJR delivers superior dynamic performance and lower leakage but demands tighter capacitor tolerance control and higher BOM cost.
Availability
SC1462ISKTRT is available at Aetrix Electronics and suitable for handheld LCD bias supplies, cellular phone auxiliary rails, and portable medical sensor nodes requiring stable component supply with RoHS-compliant packaging and tape-and-reel delivery.
Supply support for SC1462ISKTRT 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
Semtech Corporation is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs for power management, protection, and signal integrity applications.
The SC1462 product line targets low-power portable electronics requiring compact, inductorless DC-DC conversion - optimized for battery longevity, small form factor, and ease of integration in consumer handhelds.
FAQ
What is the maximum output current specification for SC1462ISKTRT?
The SC1462ISKTRT delivers up to 80mA output current when VIN is between 2.5V and 3.6V, as confirmed in the Electrical Characteristics table. This rating holds across the full operating temperature range (−40°C to +85°C) and assumes proper 3.3μF ceramic capacitor placement per the Typical Application Circuit. Output current drops slightly at lower VIN due to increased dropout voltage.
Does SC1462ISKTRT require external inductors?
No, SC1462ISKTRT is a switched-capacitor charge pump and uses only external ceramic capacitors - specifically 3.3μF for CIN, COUT, and CBUCKET - eliminating inductors entirely. This reduces solution size, cost, and EMI concerns compared to inductive boost converters, making SC1462ISKTRT ideal for space-sensitive portable designs.
What is the shutdown current of SC1462ISKTRT?
The shutdown current of SC1462ISKTRT is specified as less than 1μA when the SHDN pin is pulled low, verified across temperature and input voltage conditions. This ultra-low leakage enables multi-month battery life in always-off portable devices, and the SHDN pin accepts standard CMOS logic levels (VIH ≥ 1.6V, VIL ≤ 0.4V) for direct microcontroller interfacing.
Can SC1462ISKTRT operate from a 1.65V input?
Yes, SC1462ISKTRT is fully specified to operate from 1.65V to 5.5V input, including functional startup and regulation at the minimum 1.65V rail. At this voltage, output is ~3.3V (2×VIN), with reduced output current capability and higher dropout - confirmed in the Typical Dropout Voltage vs. IOUT graph for VIN = 1.5V and VIN = 2.5V.
Is SC1462ISKTRT pin-compatible with other Semtech charge pumps?
No, SC1462ISKTRT has a unique 6-pin SOT-23-6 pinout (VIN, GND, C−, SHDN, VOUT, C+) not shared with other Semtech charge pumps like SC1453 or SC2982. Substitution requires PCB layout changes; the SC1462ISKTRT pin configuration is explicitly defined in the Pin Descriptions section and validated in the Outline Drawing on page 9 of the datasheet.
SC1462ISKTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Ratiometric
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.65V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 80mA
- Frequency - Switching:
- 160kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
SC1462ISKTRT FAQ
1.How can I place an order for SC1462ISKTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC1462ISKTRT 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 SC1462ISKTRT reliable?
The price and inventory of SC1462ISKTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC1462ISKTRT is usually 5 days.
3.What payment methods are accepted for SC1462ISKTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC1462ISKTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC1462ISKTRT?
SC1462ISKTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC1462ISKTRT 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 SC1462ISKTRT?
For technical support, including SC1462ISKTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC1462ISKTRT requirements.
6.How does Aetrix verify that SC1462ISKTRT is sourced from the original manufacturer or authorized distributors?
All SC1462ISKTRT 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 SC1462ISKTRT meets industry standards.
7.What is the process for return or replacement of SC1462ISKTRT?
All SC1462ISKTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC1462ISKTRT, 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 SC1462ISKTRT part is unused and in its original packaging.
Return procedure for SC1462ISKTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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