LP873222-Q1 Texas instruments

LP873222-Q1

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LP873222-Q1

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Описание

The LP873222-Q1 is designed to meet the power management requirements in automotive applications. The device has two step-down DC/DC converters, 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 gives high efficiency over a wide output-current range. The LP873222-Q1 supports remote voltage sensing 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 LP873222-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.

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
- 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

Regulated outputs (#)	4
Vin (min) (V)	2.8
Vin (max) (V)	5.5
Iout (max) (A)	2
Rating	Automotive
Step-down DC/DC controller	0
Step-down DC/DC converter	2
Step-up DC/DC controller	0
Step-up DC/DC converter	0
LDO	2
Iq (typ) (mA)	0.009
Switching frequency (max) (kHz)	2200
Features	Enable pin, I2C control, Power good, Power sequencing, Spread-Spectrum Clock (SSC) Generation, Thermal shutdown, UVLO adjustable
Operating temperature range (°C)	-40 to 125
Processor name	R-Car E2
Processor supplier	Renesas
Shutdown current (ISD) (typ) (µA)	9
Switching frequency (typ) (kHz)	2000
Configurability	Software configurable