ZHCSOY3L January   2005  – February 2022 TPS799

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 描述
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Internal Current Limit
      2. 7.3.2 Shutdown
      3. 7.3.3 Start Up
      4. 7.3.4 Undervoltage Lockout (UVLO)
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input and Output Capacitor Requirements
        2. 8.2.2.2 Output Noise
        3. 8.2.2.3 Dropout Voltage
        4. 8.2.2.4 Transient Response
        5. 8.2.2.5 Minimum Load
        6. 8.2.2.6 Feedback Capacitor Requirements (TPS79901 Only)
      3. 8.2.3 Application Curve
    3. 8.3 What To Do and What Not To Do
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Board Layout Recommendations to Improve PSRR and Noise Performance
      2. 10.1.2 Thermal Information
        1. 10.1.2.1 Thermal Protection
        2. 10.1.2.2 Power Dissipation
        3. 10.1.2.3 Package Mounting
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Evaluation Modules
        2. 11.1.1.2 Spice Models
      2. 11.1.2 Device Nomenclature
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 接收文档更新通知
    4. 11.4 支持资源
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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6.5 Electrical Characteristics

at TJ = –40°C to +125°C, VIN = VOUT(nom) + 0.3 V or 2.7 V (whichever is greater), IOUT = 1 mA, VEN = VIN, COUT = 2.2 μF, and CNR = 0.01 μF (unless otherwise noted); for TPS79901, VOUT = 3.0 V; typical values are at TJ = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VFB Internal reference (TPS79901) 1.169 1.193 1.217 V
VOUT Output voltage range (TPS79901) VFB 6.5 – VDO V
Output accuracy, nominal TJ = 25°C –1% 1%
Output accuracy(1)
over VIN, IOUT, temperature		 VOUT + 0.3 V ≤ VIN ≤ 6.5 V
500 μA ≤ IOUT ≤ 200 mA		 –2% ±1% 2%
ΔVO(ΔVI) Line regulation(1) VOUT(NOM) + 0.3 V ≤ VIN ≤ 6.5 V 0.02 %/V
ΔVO(ΔIO) Load regulation 500 μA ≤ IOUT ≤ 200 mA 0.002 %/mA
VDO Dropout voltage(1)
(VIN = VOUT(nom) – 0.1 V)		 IOUT = 200 mA VOUT(nom) ≤ 3.3 V 100 175 mV
VOUT(nom) ≥ 3.3 V 90 160
ICL Output current limit VOUT = 0.9 × VOUT(nom) 220 400 600 mA
IGND Ground pin current 500 μA ≤ IOUT ≤ 200 mA 40 60 μA
ISHDN Shutdown current (IGND) VEN ≤ 0.4 V, 2.7 V ≤ VIN ≤ 6.5 V 0.15 1 μA
IFB Feedback pin current (TPS79901) –0.5 0.5 µA
PSRR Power-supply rejection ratio VIN = 3.85 V,
VOUT = 2.85 V,
CNR = 0.01 μF,
IOUT = 100 mA		 f = 100 Hz 70 dB
f = 1 kHz 66
f = 10 kHz 51
f = 100 kHz 38
Vn Output noise voltage BW = 10 Hz to 100 kHz, VOUT = 2.85 V CNR = 0.01 μF 10.5 × VOUT μVRMS
CNR = none 94 × VOUT
Start-up time VOUT = 2.85 V,
RL = 14 Ω,
COUT = 2.2 μF		 CNR = 0.001 μF 45 μs
CNR = 0.047 μF 45
CNR = 0.01 μF 50
CNR = none 50
VEN(HI) Enable high (enabled) 1.2 VIN V
VEN(LO) Enable low (shutdown) 0 0.4 V
IEN(HI) Enable pin current, enabled VEN = VIN = 6.5 V 0.03 1 μA
UVLO Undervoltage lockout VIN rising 1.90 2.20 2.65 V
UVLO hysteresis VIN falling 70 mV
Tsd Thermal shutdown temperature Shutdown, temperature increasing 165 °C
Reset, temperature decreasing 145
(1) VDO is not measured for devices with VOUT(nom) < 2.8 V because minimum VIN = 2.7 V.