ZHCSU17F March   2009  – April 2024 TPS798-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Dissipation Ratings
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagrams
    3. 6.3 Feature Description
      1. 6.3.1 Adjustable Operation
      2. 6.3.2 Output Capacitance and Transient Response
      3. 6.3.3 Calculating Junction Temperature
      4. 6.3.4 Protection Features
    4. 6.4 Device Functional Modes
      1. 6.4.1 Low-Voltage Tracking
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
      1. 7.3.1 Thermal Considerations
      2. 7.3.2 Thermal Layout Considerations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 接收文档更新通知
    2. 8.2 支持资源
    3. 8.3 Trademarks
    4. 8.4 静电放电警告
    5. 8.5 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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5.5 Electrical Characteristics

VIN = VOUT(NOM) + 1V or 4V (whichever is greater for either fixed or adjustable versions), ILOAD = 1mA, VEN = 3V, and COUT = CIN = 2.2μF (unless otherwise noted); for the TPS79801, the FB pin is tied to VOUT; typical values are at TJ = 25°C
PARAMETER TEST CONDITIONS TJ(1) MIN TYP MAX UNIT
VIN Minimum input voltage ILOAD = 50mA Full range 3 4 V
Fixed VOUT Initial output voltage accuracy VIN = VOUT nom + 0.5V 25°C –1.5% 1.5%
Output voltage accuracy over line, load, and full temperature range VIN = VOUT nom + 1V to 50V,
ILOAD = 1mA to 50mA		 Full range –3% 3%
Adjustable VOUT Initial output voltage accuracy VIN = 3V 25°C 1.256 1.275 1.294 V
Output voltage accuracy over line, load, and full temperature range VIN = 4V to 50V, ILOAD = 1mA to 50mA Full range 1.237 1.275 1.313 V
ΔVOUT/ΔVIN Line regulation, adjustable VOUT ΔVIN = 3V to 50V Full range 13 mV
Line regulation, TPS79850 VIN = VOUT nom + 0.5V to 50V 15 mV
ΔVOUT/ΔIOUT Load regulation, adjustable VOUT ΔILOAD = 1mA to 50mA 25°C 20 mV
Full range 32
Load regulation, fixed VOUT ΔILOAD = 1mA to 50mA 25°C 50 mV
Full range 90
Adjustable VOUT Output voltage range(2) (3) Full range 1.275 28 V
VDO Dropout voltage(4) (5) VIN = VOUT(NOM) – 0.1V 25°C 85 150 mV
Full range 190
ILOAD = 10mA,
VIN = VOUT(NOM) – 0.1V		 25°C 170 260
Full range 350
ILOAD = 50mA,
VIN = VOUT(NOM) – 0.1V		 25°C 300 370
Full range 550
IGND GND pin current(6) VIN = VOUT(NOM) ILOAD = 0mA Full range 30 80 μA
ILOAD = 1mA Full range 100 180
ILOAD = 10mA Full range 400 700
ILOAD = 50mA Full range 1.8 3.3 mA
VN Output voltage noise COUT = 10μF, ILOAD = 50mA,
BW = 10Hz to 100kHz, VIN = 4.3V,
VOUT = 3.3V (adjustable used)		 25°C 100 μVRMS
IFB FB pin bias current(7) VIN = 3V 25°C 0.05 0.2 μA
VEN EN pin high (enabled)(8) OFF to ON, VIN = 6V Full range 1.5 V
EN pin low (shutdown)(8) ON to OFF, VIN = 6V 25°C 0.4 V V
EN pin low (shutdown)(8) ON to OFF, VIN = 6V Full range 0.2 V V
IEN EN pin current(8) VEN = 0V VIN = 6V, ILOAD = 0mA Full range 0.4 2 μA
VEN = 3V, VIN = 6V, ILOAD = 0mA Full range 0.4 0.5
Ishutdown GND pin current(6) VIN = 6V, VEN = 0V, ILOAD = 0mA Full range 3 25 μA
PSRR Power-supply rejection ratio VIN = 4.3V, VOUT 3.3V VRIPPLE = 0.5VPP,
fRIPPLE = 120Hz, ILOAD = 50mA		 25°C 65 dB
ILIMIT Fixed current limit(9) ΔVOUT = VOUT(NOM) – 0.1V Full range 60 200 mA
Adjustable current limit ΔVOUT = VOUT(NOM) – 0.1V Full range 60 200 mA
IRL Input reverse leakage current(reverse battery test) VIN = –60V, VOUT = open, CIN open Full range 6 mA
IRO Reverse output current(10) VOUT = VOUT(NOM), VIN = ground 25°C 19 25 μA
TSD Thermal shutdown temperature (TJ)(11) Shutdown, temperature increasing 135 °C
Reset, temperature decreasing 135
(1) Full range TJ = –40°C to 125°C.
(2) This parameter is tested and specified under pulse load conditions such that TJ = TA. This device is 100% production tested at TA = 25°C. Performance at full range is specified by design, characterization, bench to ATE correlation testing, and other statistical process controls.
(4) This device is limited by a maximum junction temperature of TJ = 125°C. The regulated output voltage specification cannot be applied to all combinations of various VIN, VOUT, ambient temperature, and IOUT conditions. When operating with large voltage differentials across the device, the output load must be limited so as not to violate the maximum junction temperature for a given ambient temperature.
(5) In the adjustable version test, the output uses an external voltage divider. This resistor voltage divider is made up of R1 = 215kΩ and R2 (bottom resistor) = 340kΩ. This configuration preloads the output with 6μA.
(6) By definition, dropout voltage is the minimum input voltage needed to maintain a given output voltage at a specific load current. For dropout testing, minimum VIN = VOUT(NOM) × 0.96. This specification ensures that the device is in dropout and takes into account the output voltage tolerance over the full temperature range.
(7) Ground pin current is tested with VIN = VOUT(NOM) or 3V, whichever is greater.
(8) FB pin current flows into the FB pin.
(9) EN pin current flows into the EN pin.
(10) Current limit is tested with VIN = VOUT(NOM) + 0.5V or 3V, whichever is greater. VOUT is forced to VOUT(NOM) – 0.1V and the output current is measured.
(11) Reverse output current is tested with the IN pin tied to ground and the output forced to VOUT(NOM) +0.1V. This current flows into the OUT pin and out of the GND pin and then measured.
(12) Specified by design.
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