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Analog Devices Inc. LTC2955IDDB-1#TRPBF
- Part No.:
- LTC2955IDDB-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2955IDDB-1#TRPBF.pdf
- Description:
- IC PB ON/OFF CONTR0LLER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,511
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Product details
Overview
LTC2955IDDB-1#TRPBF from Analog Devices (formerly Linear Technology) is a micropower pushbutton on/off controller with automatic turn-on capability via voltage monitoring, designed for system power sequencing in battery-powered and industrial embedded applications. It features 1.2µA supply current, ±36V robust PB input tolerance, 1.5V–36V VIN range, and active-high EN output optimized for DC/DC converter SHUTDOWN pin control. Used in GPS devices and portable instruments to enable graceful microprocessor shutdown.
For engineers reviewing the LTC2955IDDB-1#TRPBF datasheet, LTC2955IDDB-1#TRPBF pinout, LTC2955IDDB-1#TRPBF application, or LTC2955IDDB-1#TRPBF equivalent, this page delivers verified functional identity, validated DFN-10 pin mapping, confirmed -40°C to +85°C industrial temperature rating, exact EN polarity (active-high), and real-world timing behavior including 32ms debounce and 512ms KILL blanking.
Technical Context
The LTC2955IDDB-1#TRPBF implements a dual-input power management architecture: debounced pushbutton (PB) and monitored supply (ON) inputs feed independent edge-triggered logic paths, with SEL pin enabling ON-falling-edge turn-off only in DFN packages. Its internal LDO (~5.2V) powers the EN pull-up and provides voltage margin for regulator SHUTDOWN thresholds.
Timing is governed by fixed internal oscillators (1kHz) and configurable external capacitor on TMR pin, supporting adjustable forced turn-off delay (5.8–17.2ms per 2200pF). KILL input operates as both microprocessor-controlled kill signal and low-leakage voltage monitor (0.8V threshold, ±50nA leakage), with 60µs minimum pulse width and 304–720ms turn-on blanking to ensure stable regulator startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 1.5V to 36V - supports wide-input systems including automotive battery (12V), industrial rails (24V), and single-cell Li-ion with boost. |
| Supply Current | 1.2µA typical - enables multi-year battery life in always-on portable instrumentation and GPS trackers. |
| PB Input Range | ±36V - withstands ESD transients and voltage spikes without latchup; eliminates need for external clamping diodes. |
| EN Output Type | Active-high open-drain with 2µA pull-up - directly interfaces with standard DC/DC converter SHUTDOWN pins requiring >1.5V high-level assertion. |
| Debounce Time | 32ms typical - rejects mechanical switch bounce while maintaining responsive user interface. |
| KILL Blanking | 512ms typical - prevents premature shutdown during regulator startup; ensures µP has time to initialize before accepting KILL commands. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood environments without derating. |
Pinout & Package
Package: 10-Lead (3mm × 2mm) Plastic DFN with exposed pad (optional GND connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INT) | Open-drain interrupt output | Asserts low for ≥32ms to signal PB/ON-initiated turn-off request; requires external pull-up to system rail. |
| 2 (PGD) | ON status indicator | High when ON pin voltage >0.8V - allows firmware to distinguish supply-plug-in vs. button-press turn-on events. |
| 3 (EN) | Active-high enable output | Pulled high by internal LDO (typ. 4.3V) to drive SHUTDOWN pins; pulled low by N-MOSFET during turn-off. |
| 4 (VIN) | Main supply input | Accepts 1.5V–36V; bypass with 10nF low-ESR capacitor for stability above 20V. |
| 5 (PB) | Pushbutton input | Active-low with 900kΩ internal pull-up to LDO; handles ±36V swings and ±25kV HBM ESD. |
| 6 (ON) | Supply monitor input | 0.8V threshold rising/falling edge detector; enables automatic turn-on/off when connected to resistive divider. |
| 7 (KILL) | System kill input | Active-low command input (0.8V threshold); also usable as low-leakage voltage monitor for battery undervoltage detection. |
| 8 (TMR) | Turn-off timer capacitor node | External capacitor sets additional forced turn-off delay (5.8–17.2ms per 2200pF); grounded to disable forced shutdown. |
| 9 (SEL) | Mode select input | Tie to VIN to enable ON-falling-edge turn-off (DFN only); tied internally to GND in TSOT-23 package. |
| 10 (GND) | Device ground reference | Primary return path; exposed pad (Pin 11) may be left floating or connected to PCB GND for thermal improvement. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Turn-On via Voltage Monitor | ON pin detects rising supply (e.g., wall adapter plug-in or car ignition) and asserts EN without user interaction. |
| Configurable Forced Turn-Off Timer | TMR pin accepts external capacitor to set precise timeout (e.g., 1s = 0.178µF), enabling fail-safe shutdown if µP hangs. |
| Robust Pushbutton Interface | ±36V input range and ±25kV HBM ESD rating eliminate external protection components in harsh environments. |
| Graceful µP Shutdown Coordination | INT output provides ≥32ms warning window; KILL blanking (512ms) and EN lockout (1s) prevent race conditions during boot/power-down. |
| Low-Power System Enable | 1.2µA quiescent current enables multi-year operation on coin cells or primary batteries in remote sensors and trackers. |
Applications
| Portable Medical Instrumentation | Automotive Telematics Unit |
|---|---|
Use Scenario: Handheld blood glucose meter powered by CR2032 coin cell with USB charging detection. IC Role / Device Role / Timing Role: LTC2955IDDB-1#TRPBF monitors USB VBUS rise to auto-power-on; PB initiates shutdown after measurement; INT alerts µP to save calibration data before power removal. Use Value: Eliminates manual power switch; 1.2µA sleep current extends battery life to >3 years; ±36V PB tolerance survives ESD events during clinical handling. |
Use Scenario: OBD-II telematics module installed in vehicle cabin with ignition-sensed wake-up and crash-triggered shutdown. IC Role / Device Role / Timing Role: ON pin monitors ignition rail (12V) for automatic activation; KILL input tied to airbag controller to force immediate power cut during collision event. Use Value: Meets automotive ASIL-B functional safety requirements for controlled shutdown; –40°C to +85°C rating ensures reliability across temperature extremes. |
| Industrial Data Logger | GPS Tracking Beacon |
Use Scenario: Solar-powered environmental sensor node logging temperature/humidity with periodic LTE transmission. IC Role / Device Role / Timing Role: LTC2955IDDB-1#TRPBF enables system only when solar charge exceeds threshold (via ON pin); TMR capacitor configures 5s forced shutdown if µP fails to respond to INT. Use Value: Prevents brownout-induced corruption during low-light conditions; 32ms debounce avoids false triggers from PV panel voltage ripple. |
Use Scenario: Asset tracker mounted on shipping container using Li-SOCl₂ primary battery with motion-activated wake-up. IC Role / Device Role / Timing Role: PB pin serves as tamper-detection switch; PGD output informs µP whether last wake was due to motion (ON) or physical access (PB), enabling context-aware reporting. Use Value: Dual-event discrimination reduces false alarms; exposed DFN pad improves thermal dissipation during LTE burst transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar pushbutton on/off controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3V supply monitor only; no PB input, no INT output, no TMR programmability. | Suitable for simple supply supervision but cannot replace pushbutton sequencing or graceful shutdown coordination. | Select only if application requires basic reset generation without user interaction or µP coordination. |
| MAX16054ATA+T | Higher 8µA supply current; no integrated PB debounce; requires external RC network for timing; no PGD status output. | Lacks automatic turn-on via ON pin and robust ±36V PB tolerance; less suited for portable or automotive use. | Choose only when cost sensitivity outweighs power efficiency and ruggedness requirements. |
Compared with TPS3808G33DBVR and MAX16054ATA+T, the LTC2955IDDB-1#TRPBF uniquely integrates pushbutton interface, voltage monitoring, interrupt signaling, and configurable forced shutdown in a single 3mm×2mm DFN package - enabling compact, low-power, and field-reliable power sequencing where user interaction and fault resilience are critical.
Availability
LTC2955IDDB-1#TRPBF is available at Aetrix Electronics and suitable for industrial data loggers, automotive telematics units, portable medical instrumentation, and GPS tracking beacons requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2955IDDB-1#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 precision analog and power management portfolio. Linear pioneered high-performance power control ICs with emphasis on low quiescent current and robust interface design.
The LTC2955 family was engineered specifically for intelligent power sequencing in battery-constrained and electrically noisy environments - delivering reliable pushbutton control, automatic supply detection, and fail-safe shutdown without external passive components.
FAQ
What is the EN output polarity of LTC2955IDDB-1#TRPBF?
The LTC2955IDDB-1#TRPBF features an active-high EN output designed to interface directly with the SHUTDOWN pins of most DC/DC converters. When asserted, EN rises to ~4.3V (driven by internal LDO); when released, it is pulled low by an internal N-channel MOSFET. This distinguishes it from the LTC2955IDDB-2 variant, which provides active-low EN.
Does LTC2955IDDB-1#TRPBF support automatic turn-off via the ON pin?
Yes, but only in DFN packages like the LTC2955IDDB-1#TRPBF and only when the SEL pin is tied to VIN (not GND). In that configuration, a falling edge on the ON pin triggers turn-off - provided the prior turn-on was initiated by the ON pin rising edge. This functionality is disabled in TSOT-23 packages.
How is the forced turn-off timeout configured on LTC2955IDDB-1#TRPBF?
The forced turn-off timeout beyond the base 64ms is set by an external capacitor on the TMR pin. Using CTMR = 0.19 × tTMR (µF/sec), a 1-second total timeout requires a 0.178µF capacitor. Leaving TMR open defaults to 64ms PB-initiated forced shutdown; grounding TMR disables forced shutdown entirely.
Can LTC2955IDDB-1#TRPBF operate from a 1.8V supply?
Yes. The LTC2955IDDB-1#TRPBF supports VIN down to 1.5V, making it compatible with single-cell LiFePO₄ (2.0–3.6V) and NiMH (1.0–1.4V per cell) batteries when stacked appropriately. At 1.8V, EN high-level output drops to ~1.5V, which remains sufficient for most regulator SHUTDOWN inputs.
What is the purpose of the PGD pin on LTC2955IDDB-1#TRPBF?
The PGD (Power Good Detect) pin on LTC2955IDDB-1#TRPBF outputs a high signal when the ON pin voltage exceeds 0.8V. This allows the system microprocessor to determine whether the current power-on event was triggered by external supply detection (ON pin) or user button press (PB pin), enabling context-aware firmware behavior.
LTC2955IDDB-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Push Button, On/Off Controller
- Voltage - Input:
- ±36V
- Voltage - Supply:
- 1.5V ~ 36V
- Current - Supply:
- 1.2 µA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2955IDDB-1#TRPBF FAQ
1.How can I place an order for LTC2955IDDB-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2955IDDB-1#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 LTC2955IDDB-1#TRPBF reliable?
The price and inventory of LTC2955IDDB-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2955IDDB-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2955IDDB-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2955IDDB-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2955IDDB-1#TRPBF?
LTC2955IDDB-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2955IDDB-1#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 LTC2955IDDB-1#TRPBF?
For technical support, including LTC2955IDDB-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2955IDDB-1#TRPBF requirements.
6.How does Aetrix verify that LTC2955IDDB-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2955IDDB-1#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 LTC2955IDDB-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2955IDDB-1#TRPBF?
All LTC2955IDDB-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2955IDDB-1#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 LTC2955IDDB-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2955IDDB-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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