TPS746-Q1 Automotive adjustable 1-A low-dropout (LDO) linear regulator with power good | TI.com

TPS746-Q1
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Automotive adjustable 1-A low-dropout (LDO) linear regulator with power good

 

Description

The TPS746-Q1 is a 1-A ultra-low-dropout regulator (LDO) with power-good functionality. This device is available in a small 6-pin, 2-mm × 2-mm and a small 8-pin, 3-mm × 3-mm WSON package with wettable flanks to facilitate optical inspection. The TPS746-Q1 consumes low quiescent current and provides fast line and load transient performance.

The TPS746-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 TPS746-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 TPS746-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 TPS746-Q1 has an internal foldback current limit that helps reduce the thermal dissipation during short-circuit events.





Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Device operating junction temperature range: –40°C to +150°C
  • Package:
    • 2-mm × 2-mm wettable flank WSON
    • 3-mm × 3-mm wettable flank WSON (preview)
  • 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: 38 dB at 100 kHz
  • Output accuracy: ±0.85% typical, ±1.5% maximum
  • Power-good output options:
    • Open-drain or push-pull
  • Ultra-low dropout:
    • 265 mV (max) at 1 A (3.3 VOUT)
  • Stable with a 1-µF or larger capacitor
  • Low IQ: 25 µA (typical)
  • Active output discharge
  • Low thermal resistance:
    • DRV (6-pin WSON), RθJA = 80.3°C/W
    • DRB (8-pin WSON), RθJA = 62.0°C/W (preview)

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Parametrics

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Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Fixed output options (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Noise (uVrms) Approx. price (US$) Rating PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS746-Q1 Order now Adjustable Output
Fixed Output    
1     6     1.5     5.5     0.55     1
1.1
1.2
1.5
1.8
2.5
2.8
2.9
3.3    
WSON | 6     Enable
Power Good
Foldback Overcurrent Protection    
1     -40 to 125     80     30     0.50 | 1ku     Automotive     45     2     190     0.025     6WSON: 4 mm2: 2 x 2 (WSON | 6)    
TPS745-Q1 Order now Adjustable Output
Fixed Output    
0.5     6     1.5     5.5     0.55     1
1.05
1.1
1.2
1.5
1.8
2.2
2.5
2.8
2.9
3.3
5    
WSON | 6     Enable
Power Good
Output Discharge
Soft Start
Foldback Overcurrent Protection    
1     -40 to 125     80     53     0.38 | 1ku     Automotive     45     2     225     0.025     6WSON: 4 mm2: 2 x 2 (WSON | 6)