Overview
The LTC2955CDDB-1#TRMPBF, produced by Analog Devices Inc., is a micropower, pushbutton on/off controller designed to manage system power efficiently. This device generates a clean enable output from the supply monitor input, making it ideal for controlling the power state of various electronic systems. It features automatic turn-on with power-fail indication, ensuring reliable operation under different power conditions.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VIN Supply Voltage Range | 1.5 | 36 | V | ||
| VIN Supply Current | 0.5 | 1.2 | 3 | µA | |
| VUVL VIN Undervoltage Lockout | VIN Rising | 1.0 | 1.15 | 2.8 | V |
| ITMR(PU) TMR Pull-Up Current | TMR = 0V | -2 | -3 | -4 | µA |
| ITMR(PD) TMR Pull-Down Current | TMR = 1.5V | 2 | 3 | 4 | µA |
| tDB(ON) PB, ON Turn-On Debounce Time | PB Falling or ON Rising → Enable Asserted | 19 | 32 | 45 | ms |
| tDB(OFF) PB Interrupt Debounce Time | PB Falling → INT Falling | 19 | 32 | 45 | ms |
Key Features
- Automatic Turn-On with Power-Fail Indication: The LTC2955CDDB-1#TRMPBF automatically turns on the system when the pushbutton is pressed or the ON pin goes high, and it provides a power-fail indication.
- Low Power Consumption: The device operates with a micropower supply current, typically 1.2 µA, making it suitable for battery-powered applications.
- Debounce Timing: Features turn-on and turn-off debounce times to prevent spurious switching due to button bounce or noise.
- Internal Blanking Time: An internal 512ms blanking time ensures that the enable output remains high long enough for the voltage regulator to turn on and stabilize.
- Multiple Input Pins: Includes PB (pushbutton), ON, KILL, and SEL pins for flexible control and monitoring of the power state.
Applications
- Portable Electronics: Ideal for battery-powered devices such as handheld instruments, medical devices, and consumer electronics.
- Industrial Control Systems: Suitable for controlling power states in industrial automation and control systems.
- Automotive Systems: Can be used in automotive applications where reliable power management is critical.
- Embedded Systems: Useful in embedded systems that require efficient and reliable power management.
Q & A
- What is the supply voltage range of the LTC2955CDDB-1#TRMPBF?
The supply voltage range is from 1.5V to 36V.
- How much current does the LTC2955CDDB-1#TRMPBF typically consume?
The device typically consumes 1.2 µA of supply current.
- What is the purpose of the internal 512ms blanking time?
The internal 512ms blanking time ensures that the enable output remains high long enough for the voltage regulator to turn on and stabilize.
- How does the debounce timing work on the LTC2955CDDB-1#TRMPBF?
The device features turn-on and turn-off debounce times (typically 32ms) to prevent spurious switching due to button bounce or noise.
- What are the key input pins on the LTC2955CDDB-1#TRMPBF?
The key input pins include PB (pushbutton), ON, KILL, and SEL.
- What type of package does the LTC2955CDDB-1#TRMPBF come in?
The device comes in a 10-lead DFN (3mm × 2mm) plastic package.
- What is the operating temperature range of the LTC2955CDDB-1#TRMPBF?
The operating temperature range is from -40°C to 85°C.
- How does the TMR pull-up and pull-down current work?
The TMR pull-up current is typically -3 µA when TMR = 0V, and the pull-down current is typically 3 µA when TMR = 1.5V.
- What are some common applications for the LTC2955CDDB-1#TRMPBF?
Common applications include portable electronics, industrial control systems, automotive systems, and embedded systems.
- Where can I find more detailed specifications for the LTC2955CDDB-1#TRMPBF?
You can find detailed specifications in the datasheet available on Analog Devices' official website or through distributors like Digi-Key and Mouser Electronics.
