TPS745-Q1 Texas instruments

TPS745-Q1

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TPS745-Q1

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Описание

The TPS745-Q1 is a 500-mA ultra-low-dropout regulator (LDO) with power-good functionality. This device is available in a small 6-pin, 2-mm × 2-mm WSON package and a small 8-pin, 3-mm × 3-mm VSON package with wettable flanks to facilitate optical inspection. The TPS745-Q1 consumes low quiescent current and provides fast line and load transient performance.The TPS745-Q1 is a flexible device for post-regulation by supporting an input voltage range from 1.5 V to 6.0 V and an externally adjustable output range of 0.55 V to 5.5 V. The device also features fixed output voltages for powering common voltage rails.The TPS745-Q1 has a power-good (PG) output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The EN input and PG output can be used for sequencing multiple power supplies in the system.The TPS745-Q1 is stable with small ceramic output capacitors, allowing for a small overall solution size. A precision band-gap and error amplifier provides high accuracy of ±0.85% (max) at 25°C and ±1.5% (max) over temperature. This device includes integrated thermal shutdown, current limit, and undervoltage lockout (UVLO) features. The TPS745-Q1 has an internal foldback current limit that helps reduce the thermal dissipation during short-circuit events.

AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, T_A
Device junction temperature: –40°C to 150°C
Package:
- 2-mm × 2-mm wettable flank WSON
- 3-mm × 3-mm wettable flank VSON
Input voltage range: 1.5 V to 6.0 V
Output voltage range:
- Fixed option: 0.65 V to 5.0 V
- Adjustable option: 0.55 V to 5.5 V
High PSRR: 45 dB at 100 kHz
Output accuracy: ±0.85% (25°C), ±1.5% maximum
Power-good output options:
- Open-drain and push-pull
Ultra-low dropout:
- 160 mV (max) at 500 mA (3.3 V_OUT)
Stable with a 1-µF or larger capacitor
Low I_Q: 25 µA (typical), 1.5 µA (shutdown)
Active output discharge
Functional Safety-Capable
- Documentation available to aid functional safety system design
Low thermal resistance:
- DRV (6-pin WSON), R_θJA = 80.3°C/W
- DRB (8-pin VSON), R_θJA = 55.5°C/W

Output options	Adjustable Output, Fixed Output
Iout (max) (A)	0.5
Vin (max) (V)	6
Vin (min) (V)	1.5
Vout (max) (V)	5.5
Vout (min) (V)	0.55
Fixed output options (V)	1, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.5, 1.7, 1.8, 2.2, 2.5, 2.8, 2.9, 3, 3.3, 3.4, 5
Noise (µVrms)	53
Iq (typ) (mA)	0.025
Thermal resistance θJA (°C/W)	55
Rating	Automotive
Load capacitance (min) (µF)	1
Regulated outputs (#)	1
Features	Enable, Foldback overcurrent protection, Output discharge, Power good, Soft start, Wettable flanks package
Accuracy (%)	2
PSRR at 100 KHz (dB)	45
Dropout voltage (Vdo) (typ) (mV)	225
Operating temperature range (°C)	-40 to 125