SLYY203B September   2021  – April 2023 BQ25125 , LM5123-Q1 , LMR43610 , LMR43610-Q1 , LMR43620 , LMR43620-Q1 , TPS22916 , TPS3840 , TPS62840 , TPS63900 , TPS7A02

 

  1.   1
  2.   Overview
  3.   At a glance
  4.   Contributors to IQ
  5.   Why low IQ creates new challenges
    1.     Transient response
    2.     Ripple
    3.     Noise
    4.     Die size and solution area
    5.     Leakage and subthreshold operation
  6.   How to break low IQ barriers
    1.     Addressing transient response issues
    2.     Addressing switching-noise issues
    3.     Addressing other noise issues
    4.     Addressing die size and solution area issues
    5.     Addressing leakage and subthreshold operation issues
  7.   Electrical Characteristics
    1.     18
    2.     Avoiding potential system pitfalls in a low-IQ designs
    3.     Achieving low IQ, but not losing flexibility
    4.     Reducing external component count to lower IQ in automotive applications automotive applications
    5.     Smart on or enable features supporting low-IQ at the Smart on or enable features supporting low-IQ at the system level
  8.   Conclusion
  9.   Key product categories for low IQ

Electrical Characteristics

Specified at TJ = –40°C to +125°C, VIN = VOUT(nom) + 0.5 V or 2.0 V (whichever is greater), IOUT = 1 mA, VEN = VIN, and CIN = COUT = 1 µF (unless otherwise noted). Typical values are at TJ = 25°C.

Table 1 Variation of IGND and ISHDN in the TPS7A02 data sheet.
Parameter Test Conditions Min Typ Max Unit
Nominal accuracy TJ = 25°C, VOUT ≥ 1.5 V, 1 µA(1) ≤ IOUT ≤ 1 mA -1 1 %
TJ = 25°C; VOUT < 1.5 V -15 15 mV
Accuracy over temperature VOUT ≥ 1.5 V TJ = –40°C to +125°C -1.5 1.5 %
VOUT ≥ 1.5 V -20 20 mV
(ΔVIN) Line regulation VOUT(nom)+ 0.5 V ≤ VIN ≤ 6.0 V (1) TJ = –40°C to +125°C 5 mV
ΔVOUT (ΔIOUT) Line regulation (2) 1 mA ≤ IOUT ≤ 200 mA, VIN = VOUT(nom) + 0.5 V (2) TJ = –40°C to +85°C 20 38 mV
TJ = –40°C to +125°C 50
IGND Ground current IOUT = 0 mA TJ = 25°C 25 46 nA
TJ = –40°C to +85°C 60
IGND/IOUT Ground current vs load current 5 µA ≤ IOUT < 1 mA TJ = 25°C 1 %
1 mA ≤ IOUT < 100 mA 0.25
IOUT ≥ 100 mA 0.15
IGND(DO) Ground currentin dropout (3) IOUT = 0 mA, VIN = 95% x VOUT(nom) TJ = 25°C 25 nA
ISHDN Shutdown current VEN = 0 V, 1.5 V ≤ VIN ≤ 5.0 V, TJ = 25°C TJ = 25°C 3 10 nA
(1) VIN = 2.0 V for VOUT ≤ 1.5 V.
(2) Load Regulation is normalized to the output voltage at IOUT = 1 mA.
(3) Specified by design