LTC2955CTS8-1

Pushbutton On/Off Controller, 2.7V-28V, USB Power-Up, TSOT-23-8

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Manufacturer Part：

LTC2955CTS8-1

Package：

TSOT-23-8, 2.9 x 1.6 x 0.8 mm

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Product Categories：
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Description

Product Overview

The LTC2955CTS8-1 is a pushbutton on/off controller from Analog Devices, designed to provide robust power management for portable and battery-powered systems. Operating from 2.7V to 28V, this device features automatic power-up when a USB cable is inserted, in addition to standard pushbutton on/off control. With only 9µA quiescent current and ESD-protected pushbutton input (±8kV), the LTC2955 ensures reliable operation in harsh environments. The TSOT-23-8 package provides a compact solution for power button control in consumer electronics, medical devices, industrial controls, and USB-powered equipment.

Key Specifications

Parameter Value
Manufacturer Analog Devices
Part Number LTC2955CTS8-1
Product Category Pushbutton Power Controllers
Input Voltage Range 2.7V to 28V
Quiescent Current 9µA typical
Pushbutton Input Debounced, ±8kV ESD protected
USB Detection Automatic power-up on USB insertion
Turn-On Time Adjustable via capacitor
Turn-Off Time Adjustable via capacitor
Power Good Output Open-drain PGD pin
Package / Case TSOT-23-8
Operating Temperature -40°C to +125°C

Features

  • Pushbutton on/off power control
  • Automatic power-up from USB cable insertion
  • Wide 2.7V to 28V input voltage range
  • Debounced pushbutton input
  • Adjustable turn-on and turn-off timing
  • Power good (PGD) open-drain output flag
  • Low quiescent current: 9µA typical
  • ESD protected pushbutton input (±8kV HBM)
  • Compact TSOT-23-8 package
  • Wake-up from USB insertion without pushbutton press

Applications

  • Portable and battery-powered equipment
  • USB-powered devices and accessories
  • Industrial control systems and instruments
  • Medical devices and handheld instruments
  • Consumer electronics and wearables

The LTC2955CTS8-1 is a pushbutton on/off power controller from Analog Devices, designed to provide robust, reliable power management for battery-powered and USB-powered systems. This device simplifies pushbutton power control by handling all the debouncing, timing, and power sequencing logic in a single compact package.

A key feature of the LTC2955 is its USB automatic power-up capability. When a USB cable is inserted, the device automatically powers up the system without requiring a pushbutton press. This is ideal for USB-powered devices that need to turn on automatically when connected to a host or charger. The USB detection works with both USB data lines (D+/D-) and VBUS, providing reliable detection across different USB implementations.

The pushbutton input is fully debounced and ESD protected to ±8kV HBM, ensuring robust operation in real-world environments where ESD events are common. The turn-on and turn-off timing are independently adjustable using external capacitors, allowing designers to tailor the response to specific application requirements.

The LTC2955 consumes only 9µA of quiescent current, making it suitable for battery-powered devices where standby current is critical. The TSOT-23-8 package provides a compact 8-pin solution that fits easily into space-constrained designs. An open-drain power good (PGD) output signals when the output power is stable and within regulation.

The LTC2955 operates as a pushbutton power controller with the following functional blocks:

1. Power-On State Machine: The device starts in the OFF state. When a valid turn-on trigger is detected (either pushbutton press or USB insertion), the internal state machine transitions to the ON state. The EN pin (enable output) goes high, enabling the main power supply.

2. Pushbutton Debounce: The pushbutton input includes integrated debounce circuitry that filters out mechanical switch bounce and noise. A valid press is only recognized after the input has been stable for the debounce period, preventing false triggers from switch chatter or electromagnetic interference.

3. USB Detection: The USB detection block monitors for USB cable insertion. When a USB cable is connected, the device detects the presence of VBUS or activity on the D+/D- lines and automatically initiates a power-up sequence. This feature is essential for devices that need to wake up when plugged into a USB port.

4. Timing Control: External capacitors connected to the ONT (on-timer) and OFFT (off-timer) pins set the turn-on and turn-off delay times. Longer press times can be programmed to prevent accidental turn-on/off. The typical turn-on debounce is 32ms and turn-off hold time is adjustable from milliseconds to seconds.

5. EN Output: The EN pin is an active-high output that drives the enable pin of the main DC-DC converter or LDO. When the system is on, EN is high; when off, EN is low (pulled to GND).

6. Power Good (PGD): The PGD pin is an open-drain output that indicates when the output voltage is within regulation (power good). This can be used to enable downstream circuits or signal a microprocessor that power is stable.

7. ESD Protection: The pushbutton input includes built-in ESD protection to ±8kV HBM, protecting the device from electrostatic discharge events that commonly occur at user-accessible buttons.

Pin Name Type Description
1 PB Input Pushbutton input. Connect to pushbutton switch to GND. Internal pull-up to VCC. Debounced input with ±8kV ESD protection.
2 ONT I/O On-timer pin. Connect capacitor to GND to set turn-on debounce/delay time.
3 OFFT I/O Off-timer pin. Connect capacitor to GND to set turn-off hold time.
4 GND Ground Ground reference pin.
5 PGD Output Power-good open-drain output. Pulled low when output voltage is below power-good threshold. Requires external pull-up resistor.
6 EN Output Enable output. Active high. Drives the enable pin of the main power supply (DC-DC or LDO). High = ON, Low = OFF.
7 USB Input USB detect input. Connect to USB VBUS or D+/D- line. Rising edge triggers automatic power-up.
8 VCC Power Input Supply voltage input (2.7V to 28V). Bypass with 1µF ceramic capacitor to GND.
  • Battery-powered portable instruments and handheld devices
  • USB accessories that auto-power on when plugged in
  • Medical devices with power button and USB connectivity
  • Industrial control panels with front-panel power buttons
  • Wearable electronics and IoT sensor nodes
Manufacturer Part Number Package Notes
Analog Devices LTC2955CDDB-1 DFN-12 Same function in DFN-12 package
Analog Devices LTC2950 TSOT-23 Simpler version, no USB detect
Analog Devices LTC2952 QFN-24 Pushbutton controller with I²C
Texas Instruments TPS22965 QFN Load switch with pushbutton control
Microchip MCP120 SOT-23 Pushbutton power manager
Maxim MAX16054 SOT-23 Pushbutton on/off controller
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
  • Automotive Electronics: All automotive-grade components pass AEC-Q series certification, featuring excellent stability and durability to adapt to complex vehicle operating environments.
  • Medical Devices: High-reliability components meet medical industry safety and compliance regulations, ensuring stable operation for medical equipment.
  • Industrial Control & Consumer Electronics: Products conform to universal international electronic industry standards, suitable for long-term continuous operation of various equipment.

4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

5. Traceability Management System

We establish a complete product traceability system. Each batch of goods corresponds to independent batch number, sourcing record, inspection record and delivery record. Customers can query the whole lifecycle information of components at any time. This system effectively solves quality risks and facilitates after-sales handling and production quality control for your company.

6. After-sales Quality Guarantee

If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

Contact Us

If you have inquiries about our quality standards, inspection procedures or product certification documents, please feel free to contact us:

 

Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

1. Payment Terms

We offer a variety of secure and convenient payment methods to meet diverse business cooperation needs. Details are as follows:
  1. Accepted Payment Methods
  • T/T (Bank Wire Transfer): The primary settlement method for bulk orders and a widely used international payment channel.
  • PayPal: Ideal for small orders, sample orders and quick payments.

  1. Settlement Currency

     

    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

  2. Bank Charges

     

    All transfer fees, intermediary bank charges and other remittance-related expenses shall be borne by the buyer.

  3. Payment Requirements
  • Sample and small orders: Shipment will be arranged upon full payment.
  • In-stock bulk orders: Goods will be delivered within 2 to 3 working days after full payment.

2. Shipping & Delivery

We partner with leading global logistics providers to ensure safe and fast delivery worldwide. Relevant details are listed below:
  1. Logistics Partners
  • International Express: DHL, FedEx, UPS, TNT
  • Economy Logistics: Air freight and sea freight for large-volume cargo
  • Domestic Delivery: SF Express, Yunda Express
  1. Order Processing Time
  • In-stock items: Orders confirmed and fully paid before 14:00 (GMT+8) will be shipped on the same day. All other orders will be dispatched within 1 to 2 working days.
  • Out-of-stock or sourced items: The delivery lead time will be confirmed separately according to brand and inventory status.
  1. Estimated Transit Time
  • International Express: 3 – 7 working days globally
  • Air Freight: 7 – 12 working days
  • Sea Freight: 25 – 40 working days for heavy and large bulk cargo
  1. Shipping Fee Rules
  • Shipping cost is calculated based on package weight, volume, destination and delivery method.
  • Both freight prepaid and freight collect are available. Please provide your courier account number in advance if you choose freight collect.
  • Free international express delivery is offered for large orders. Terms for long-term partners can be negotiated separately.
  1. Shipment Tracking
     

    Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.

3. General Order Rules & Notes

  1. MOQ & Sample Service

     

    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

  2. Packaging Standard

     

    All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.

4. Customs & Liability Statement

  1. Import Duties & Taxes

     

    All import duties, customs clearance fees and local taxes incurred for international shipments shall be borne by the buyer. We will provide complete customs documents to assist you with clearance procedures.

  2. Handling of Lost or Damaged Goods
  • In case of loss or severe damage during transit, please contact us within 48 hours after receiving the tracking information. We will assist you in filing a claim with the logistics provider.
  • We shall not be liable for any losses caused by incorrect delivery address, wrong contact information or the buyer’s refusal to complete customs clearance.

5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
  • Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.

Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

1. One-stop Sourcing & BOM Support

We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
  • Shockproof buffer materials are added for fragile products to ensure transportation safety;
  • Each package is clearly marked with part number, quantity, batch number and specifications for easy inventory counting and management.

2. Classified Professional Packaging

  • Anti-static Packaging: Static-sensitive components such as chips, circuit boards and sensors are packaged with anti-static bags, shielding boxes and conductive foam in strict accordance with international anti-static standards to prevent static damage.
  • Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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