TPS7B81-Q1 Texas instruments

TPS7B81-Q1

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TPS7B81-Q1

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Описание

In automotive battery-connected applications, low quiescent current (IQ) is important to conserve energy and to extend battery lifetime. Always-on systems must have ultralow IQ over an extended temperature range to enable sustained operation when the vehicle ignition is off.The TPS7B81-Q1 is a low-dropout (LDO) linear regulator designed for up to 40-V VIN applications. With only a 2.7-µA typical quiescent current at light load, the device is an optimal solution for powering microcontrollers and controller area network and local interconnect network (CAN/LIN) transceivers in standby systems.The device features integrated short-circuit and overcurrent protection. This device operates in ambient temperatures from –40°C to +125°C and with junction temperatures from –40°C to +150°C. Additionally, this device is available in several packages of varying size and thermal conductivity. The small WSON package facilitates the most compact PCB design and the TO-252 package enables sustained operation despite significant dissipation across the device. These features make the device well suited as a power supply for various battery-connected automotive applications.

AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to 125°C, T_A
Device junction temperature range: –40°C to 150°C
3-V to 40-V wide V_IN input voltage range with up to 45-V transient
Maximum output current: 150 mA
Low quiescent current I_Q:
- 300 nA typical when EN = low (shutdown mode)
- 2.7 µA typical at light loads
- 4.5 µA maximum at light loads
1.5% output-voltage accuracy over line, load and temperature
Maximum dropout voltage: 540 mV at 150-mA load current for fixed 5-V output version
Stable with low-ESR (0.001-Ω to 5-Ω) ceramic output-stability capacitor (1 µF to 200 µF)
Fixed 5-V, 3.3-V and 2.5-V output voltage
Integrated fault protection:
- Thermal shutdown
- Short-circuit and overcurrent protection
Packages:
- DGN (8-pin HVSSOP), R_θJA = 63.9°C/W
- DRV (6-pin WSON), R_θJA = 72.8°C/W
- KVU (5-pin TO-252), R_θJA = 38.8°C/W

Output options	Fixed Output
Iout (max) (A)	0.15
Vin (max) (V)	40
Vin (min) (V)	3
Vout (max) (V)	5
Vout (min) (V)	3.3
Fixed output options (V)	2.5, 3.3, 5
Noise (µVrms)	450
Iq (typ) (mA)	0.0027
Thermal resistance θJA (°C/W)	31.1
TI functional safety category	Functional Safety-Capable
Rating	Automotive
Load capacitance (min) (µF)	1
Regulated outputs (#)	1
Features	Enable
Accuracy (%)	1.5
PSRR at 100 KHz (dB)	60
Dropout voltage (Vdo) (typ) (mV)	270
Operating temperature range (°C)	-40 to 150