SLVSB70C October   2013  – January 2021 TPS62085 , TPS62086 , TPS62087

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power Save Mode
      2. 8.3.2 100% Duty Cycle Low Dropout Operation
      3. 8.3.3 Soft Start
      4. 8.3.4 Switch Current Limit and Hiccup Short-Circuit Protection
      5. 8.3.5 Undervoltage Lockout
      6. 8.3.6 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable and Disable
      2. 8.4.2 Power Good
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Setting The Output Voltage
        3. 9.2.2.3 Output Filter Design
        4. 9.2.2.4 Inductor Selection
        5. 9.2.2.5 Capacitor Selection
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary

7.5 Electrical Characteristics

TJ = –40 °C to 125 °C, and VIN = 3.6 V. Typical values are at TJ = 25 °C, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY
VIN Input voltage range 2.5 6 V
IQ Quiescent current into VIN No load, device not switching
TJ = –40 °C to 85 °C, VIN = 2.5 V to 5.5 V		 17 25 µA
ISD Shutdown current into VIN EN = Low,
TJ = –40 °C to 85 °C, VIN = 2.5 V to 5.5 V		 0.7 5 µA
VUVLO Undervoltage lockout threshold VIN falling 2.1 2.2 2.3 V
Undervoltage lockout hysteresis VIN rising 200 mV
TJSD Thermal shutdown threshold TJ rising 150 °C
Thermal shutdown hysteresis TJ falling 20 °C
LOGIC INTERFACE EN
VIH High-level input voltage VIN = 2.5 V to 6.0 V 1.0 V
VIL Low-level input voltage VIN = 2.5 V to 6.0 V 0.4 V
IEN,LKG Input leakage current into EN pin EN = High 0.01 0.16 µA
RPD Pulldown resistance at EN pin EN = Low 400 kΩ
SOFT START, POWER GOOD
tSS Soft-start time Time from EN high to 95% of VOUT nominal 0.8 ms
VPG Power good threshold VOUT rising, referenced to VOUT nominal 93% 95% 98%
VOUT falling, referenced to VOUT nominal 88% 90% 93%
VPG,OL Low-level output voltage Isink = 1 mA 0.4 V
IPG,LKG Input leakage current into PG pin VPG = 5.0 V, TJ = –40 °C to 85 °C 0.01 0.16 µA
IPG,LKG Input leakage current into PG pin VPG = 5.0 V

0.01

 0.25 µA
OUTPUT
VOUT Output voltage range, TPS62085 0.8 VIN V
Output voltage accuracy,
TPS62086, TPS62087(1)		 IOUT = 1 A, VIN ≥ VOUT + 1 V, PWM mode –1.0% 1.0%
IOUT = 0 A, VIN ≥ VOUT + 1 V, PSM mode –1.0% 2.1%
VFB Feedback regulation voltage(1)(2) IOUT = 1A , VIN ≥ VOUT + 1 V, PWM mode 792 800 808 mV
IOUT = 0 A, VIN ≥ VOUT + 1 V, PSM mode 792 800 817
IFB,LKG Feedback input leakage current VFB = 1 V 0.01 0.1 µA
RDIS Output discharge resistor EN = LOW, VOUT = 1.8 V 260 Ω
Line regulation IOUT = 1 A, VIN = 2.5 V to 6.0 V 0.02 %/V
Load regulation IOUT = 0.5 A to 3 A 0.16 %/A
POWER SWITCH
RDS(on) High-side FET ON-resistance ISW = 500 mA 31 56 mΩ
Low-side FET ON-resistance ISW = 500 mA 23 45 mΩ
ILIM High-side FET switch current limit 3.7 4.6 5.5 A
fSW PWM switching frequency IOUT = 1 A 2.4 MHz
(1) For more information, see Section 8.3.1.
(2) Conditions: L = 0.47 μH, COUT = 22 μF