Overview
The LTC2955IDDB-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 and features automatic turn-on with power-fail indication. It is particularly useful in applications where low power consumption and reliable power management are crucial.
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 | |
| VIN Undervoltage Lockout (VIN Rising) | 1.0 | 1.15 | 2.8 | V | |
| TMR Pull-Up Current (TMR = 0V) | -2 | -3 | -4 | µA | |
| TMR Pull-Down Current (TMR = 1.5V) | 2 | 3 | 4 | µA | |
| PB, ON Turn-On Debounce Time | PB Falling or ON Rising → Enable Asserted | 19 | 32 | 45 | ms |
| PB Interrupt Debounce Time | PB Falling → INT Falling | 19 | 32 | 45 | ms |
Key Features
- Micropower operation with low supply current (typically 1.2 µA).
- Automatic turn-on with power-fail indication.
- Pushbutton on/off control with debounce logic.
- Wide supply voltage range (1.5V to 36V).
- Undervoltage lockout (UVLO) protection.
- Internal 5.2V low dropout regulator (VLDO).
- Multiple package options, including a 10-lead DFN package.
Applications
- Portable electronics and battery-powered devices where low power consumption is critical.
- Industrial control systems requiring reliable power management.
- Automotive systems needing robust and efficient power control.
- Medical devices that require precise power management.
- Consumer electronics such as smartphones, tablets, and other handheld devices.
Q & A
- What is the primary function of the LTC2955IDDB-1#TRMPBF? The primary function is to manage system power by generating a clean enable output from the supply monitor input and providing automatic turn-on with power-fail indication.
- What is the supply voltage range of the LTC2955IDDB-1#TRMPBF? The supply voltage range is from 1.5V to 36V.
- What is the typical supply current of the LTC2955IDDB-1#TRMPBF? The typical supply current is 1.2 µA.
- Does the LTC2955IDDB-1#TRMPBF have undervoltage lockout protection? Yes, it has undervoltage lockout (UVLO) protection.
- What is the purpose of the internal 5.2V low dropout regulator (VLDO)? The internal 5.2V VLDO provides a stable voltage for internal circuitry.
- What are the debounce times for the pushbutton and interrupt signals? The debounce times are typically 32 ms for both the pushbutton turn-on and interrupt signals.
- In what types of applications is the LTC2955IDDB-1#TRMPBF commonly used? It is commonly used in portable electronics, industrial control systems, automotive systems, medical devices, and consumer electronics.
- What package options are available for the LTC2955IDDB-1#TRMPBF? It is available in a 10-lead DFN package among others.
- How does the TMR pull-up and pull-down current work? The TMR pull-up current is typically -3 µA when TMR is at 0V, and the pull-down current is typically 3 µA when TMR is at 1.5V.
- What is the significance of the power-fail indication feature? The power-fail indication feature alerts the system when the supply voltage drops below a certain threshold, ensuring reliable operation.
