Overview
The LT8609AIMSE#PBF from Analog Devices Inc. is a compact, high-efficiency, high-speed synchronous monolithic step-down switching regulator. This device is designed to operate over a wide input voltage range of 3.0V to 42V, making it versatile for various power management applications. It features an ultralow quiescent current of 1.7µA in Burst Mode operation, which is particularly beneficial for battery-powered devices and other low-power systems. The regulator is available in a 10-lead MSOP package and supports operating temperatures from -40°C to 125°C.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Units |
|---|---|---|---|---|
| Input Voltage | 3.0 | - | 42 | V |
| Quiescent Current (LT8609/LT8609A) | 1 | 1.7 | 4 | µA |
| Quiescent Current (LT8609B) | 1 | 350 | 4 | µA |
| Output Current | - | - | 2 | A |
| Switching Frequency | 200 kHz | - | 2.2 MHz | - |
| Output Voltage Ripple | - | - | 10 mV P-P | - |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package | - | - | 10-Lead MSOP | - |
Key Features
- High efficiency and high speed synchronous monolithic step-down switching regulator.
- Ultralow quiescent current of 1.7µA in Burst Mode operation.
- Wide input voltage range of 3.0V to 42V.
- Internal compensation with peak current mode topology, allowing the use of small inductors and fast transient response.
- Accurate 1V threshold on the EN/UV pin for programming VIN UVLO or shutdown.
- Programmable output voltage ramp rate during start-up using a capacitor on the TR/SS pin.
- PG flag signals when VOUT is within ±8.5% (adjustable output) or ±7.5% (fixed output) of the programmed output voltage.
- LT8609A version has slower switch edges for lower EMI emissions.
- LT8609B operates in pulse-skipping mode only.
Applications
- Battery-powered devices and systems requiring low power consumption.
- Automotive applications (specific models designated with a #W suffix).
- Industrial power supplies and control systems.
- Portable electronics and handheld devices.
- Medical devices and equipment.
Q & A
- What is the input voltage range of the LT8609AIMSE#PBF?
The input voltage range is from 3.0V to 42V.
- What is the quiescent current of the LT8609AIMSE#PBF in Burst Mode operation?
The quiescent current is 1.7µA.
- What is the maximum output current of the LT8609AIMSE#PBF?
The maximum output current is 2A.
- What is the switching frequency range of the LT8609AIMSE#PBF?
The switching frequency range is from 200 kHz to 2.2 MHz.
- How does the EN/UV pin function in the LT8609AIMSE#PBF?
The EN/UV pin has an accurate 1V threshold and can be used to program VIN UVLO or to shut down the part.
- What is the purpose of the TR/SS pin in the LT8609AIMSE#PBF?
A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up.
- What is the significance of the PG flag in the LT8609AIMSE#PBF?
The PG flag signals when VOUT is within ±8.5% (adjustable output) or ±7.5% (fixed output) of the programmed output voltage.
- How does the LT8609A version differ from the standard LT8609?
The LT8609A version has slower switch edges for lower EMI emissions.
- What is the operating mode of the LT8609B version?
The LT8609B operates in pulse-skipping mode only.
- What is the package type and temperature range of the LT8609AIMSE#PBF?
The package is a 10-Lead MSOP, and the operating temperature range is from -40°C to 125°C.
