Gehäuseinformationen
| Gehäuse | Pins VQFN (RHD) | 28 |
| Betriebstemperaturbereich (°C) -40 to 125 |
| Gehäusemenge | Träger 3.000 | LARGE T&R |
Merkmale von LP8732-Q1
- AEC-Q100 qualified with the following results:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature
- Input voltage: 2.8 V to 5.5 V
- Two high-efficiency step-down DC/DC converters:
- Output voltage: 0.7 V to 3.36 V
- Maximum output current 2 A per phase
- Adding and shedding auto phase and force multi-phase operations in dual-phase configuration
- Remote differential feedback voltage sensing in dual-phase configuration
- Programmable output-voltage slew rate from 0.5 mV/µs to 10 mV/µs
- 2-MHz switching frequency
- Spread-spectrum mode and phase interleaving for EMI reduction
- Two linear regulators:
- Input voltage: 2.5 V to 5.5 V
- Output voltage: 0.8 V to 3.3 V
- Maximum output current 300 mA
- Configurable general-purpose output signals (GPO, GPO2)
- Interrupt function with programmable masking
- Programmable power-good signal (PGOOD)
- Output short-circuit and overload protection
- Overtemperature warning and protection
- Overvoltage protection (OVP) and undervoltage lockout (UVLO)
- 28-pin, 5-mm × 5-mm VQFN package with wettable flanks
Beschreibung von LP8732-Q1
The LP8732xx-Q1 is designed to meet the power management requirements in automotive applications. The device has two step-down DC/DC converters (which can be configured as a single dual-phase regulator or two single-phase regulators), two linear regulators, and two general-purpose digital-output signals. The device is controlled by an I2C-compatible serial interface and by an enable signal.
The automatic PWM/PFM (AUTO mode) operation together with the automatic phase adding/shedding gives high efficiency over a wide output-current range. The LP8732xx-Q1 supports remote voltage sensing (differential in dual-phase configuration) to compensate IR drop between the regulator output and the point-of-load (POL), thus improving the accuracy of the output voltage. In addition, the switching clock can be forced to PWM mode and also synchronized to an external clock to minimize the disturbances.
The LP8732xx-Q1 device supports programmable start-up and shutdown delays and sequences including GPO signals synchronized to the enable signal. During start-up and voltage change, the device controls the output slew rate to minimize output voltage overshoot and the in-rush current.