SLVSCP3C January   2015  – July 2016 TPS7B4253-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Short Circuit and Overcurrent Protection
      2. 7.3.2 Integrated Inductive Clamp Protection
      3. 7.3.3 OUT Short to Battery and Reverse Polarity Protection
      4. 7.3.4 Undervoltage Shutdown
      5. 7.3.5 Thermal Protection
      6. 7.3.6 Regulated Output (OUT)
      7. 7.3.7 Enable (EN)
      8. 7.3.8 Adjustable Output Voltage (FB and ADJ)
        1. 7.3.8.1 OUT Voltage Equal to the Reference Voltage
        2. 7.3.8.2 OUT Voltage Higher Than Reference Voltage
        3. 7.3.8.3 Output Voltage Lower Than Reference Voltage
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation With VIN < 4 V
      2. 7.4.2 Operation With EN Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application With Output Voltage Equal to the Reference Voltage
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Input Capacitor
          2. 8.2.1.2.2 Output Capacitor
        3. 8.2.1.3 Application Curve
      2. 8.2.2 High-Side Switch Configuration
      3. 8.2.3 High Accuracy LDO
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Power Dissipation and Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resource
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Unregulated input voltage IN(2)(3) –40 45 V
Enable input voltage Enable input voltage(2)(3) –40 45 V
Regulated output voltage Regulated output voltage(2)(4) –1 45 V
Voltage difference between the input and output IN – OUT –40 45 V
Reference voltage ADJ(2)(3) –0.3 45 V
Feedback input voltage for the tracker FB(2)(3) –1 45 V
Reference voltage minus the input voltage ADJ – IN(5) 18 V
Operating junction temperature, TJ –40 150 °C
Storage temperature, Tstg –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to the GND pin.
(3) Absolute maximum voltage.
(4) An internal diode is connected between the OUT and GND pins with 600-mA DC current capability for inductive clamp protection.
(5) When the (ADJ – IN) voltage is higher than 18 V, the (ADJ – OUT) voltage should maintain lower than 18 V, otherwise the device can be damaged.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per AEC Q100-002(1) NC pins ±2000 kV
All pins except for NC pins ±4000 kV
Charged device model (CDM), per AEC Q100-011 ±1000 kV
(1) AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VIN Unregulated input voltage(2) 4 40 V
VEN Enable input voltage 0 40 V
VADJ Adjust and enable input voltage HTSSOP package 1.5 18 V
SO PowerPAD package 2 18
VFB Feedback input voltage for the tracker HTSSOP package 1.5 18 V
SO PowerPAD package 2 18
VOUT Output voltage HTSSOP package 1.5 40 V
SO PowerPAD package 2 40
C(OUT) Output capacitor requirements(3) 10 500 µF
Output ESR requirements(4) 0.001 20 Ω
TJ Operating junction temperature range –40 150 °C
(1) Within the functional range the device operates as described in the circuit description. The electrical characteristics are specified within the conditions given in the related Electrical Characteristics table.
(2) VIN > VADJ + V(DROPOUT)
(3) The minimum output capacitance requirement is applicable for a worst-case capacitance tolerance of 30%, when a resistor divider is connected between the OUT and FB pins (the output voltage is higher than reference voltage), a 47-nF feedforward capacitor is required to be connected between the OUT and FB pins for loop stability, and the ESR range of the output capacitor is required to be from 0.001 to 10 Ω.
(4) Relevant ESR value at f = 10 kHz

6.4 Thermal Information

THERMAL METRIC(1) TPS7B4253-Q1 UNIT
DDA (SO PowerPAD) PWP (HTSSOP)
8 PINS 20 PINS
RθJA Junction-to-ambient thermal resistance 45.4 45.9 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 51.1 29.2 °C/W
RθJB Junction-to-board thermal resistance 27 24.7 °C/W
ψJT Junction-to-top characterization parameter 8.2 1.3 °C/W
ψJB Junction-to-board characterization parameter 26.9 24.5 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 6.4 3.7 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

VIN = 13.5 V, VADJ ≥ 1.5 V for HTSSOP, VADJ ≥ 2 V for SO PowerPAD, VEN ≥ 2 V, TJ = –40ºC to 150ºC unless otherwise stated
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VI(UVLO) IN undervoltage detection VIN rising 3.65 V
VIN falling 2.8 V
ΔVO Output voltage tracking accuracy(1) IOUT = 100 µA to 300 mA, VIN = 4 to 40 V
VADJ < VIN – 1 V
1.5 V < VADJ < 18 V for HTSSOP
2 V < VADJ < 18 V for SO PowerPAD		 –4 4 mV
ΔVO(ΔIO) Load regulation steady-state IOUT = 0.1 to 300 mA, VADJ= 5 V 4 mV
ΔVO(ΔVI) Line regulation steady-state IOUT= 10 mA, VIN = 6 to 40 V, VADJ = 5 V 4 mV
PSRR Power supply ripple rejection ƒrip = 100 Hz, Vrip = 0.5 VPP, C(OUT) = 10 µF, IOUT = 100 mA 70 dB
V(DROPOUT) Dropout voltage
(V(DROPOUT) = VIN – VOUT) 		IOUT = 200 mA, VIN = VADJ ≥ 4 V(2) 320 520 mV
IO(lim) Output current limitation VADJ = 5 V, OUT short to GND 301 450 520 mA
IR(IN) Reverse current at IN VIN = 0 V, VOUT = 40 V, VADJ = 5 V –2 0 µA
IR(–IN) Reverse current at negative IN VIN = –40 V, VOUT = 0 V, VADJ = 5 V –10 0 µA
TSD Thermal shutdown temperature TJ increases because of power dissipation generated by the IC 175 °C
TSD_hys Thermal shutdown hysteresis 15 °C
IQ Current consumption 4 V ≤ VIN ≤ 40 V, VADJ = 0 V; VEN = 0 V 2 4 µA
4 V ≤ VIN ≤ 40 V, VEN ≥ 2 V, VADJ < 0.8 V 7 18
4 V ≤ VIN ≤ 40 V, IOUT < 100 µA, VADJ = 5 V 60 100
4 V ≤ VIN ≤ 40 V, IOUT < 300 mA, VADJ = 5V 350 400
IQ(DROPOUT) Current consumption in dropout region VIN = VADJ = 5 V, IOUT = 100 µA 70 140 µA
II(ADJ) Adjust input current VADJ = VFB = 5 V HTSSOP package 0.5 µA
SO PowerPAD package 5.5
V(ADJ_LOW) Adjust low signal valid VOUT = 0 V HTSSOP package 0 0.8 V
SO PowerPAD package 0 0.7
V(ADJ_HIGH) Adjust high signal valid |VOUT – VADJ| < 4 mV HTSSOP package 1.5 18 V
SO PowerPAD package 2 18
V(EN_LOW) Enable low signal valid VOUT = 0 V 0 0.7 V
V(EN_HIGH) Enable high Signal Valid OUT settled 2 40 V
IEN Enable pulldown current 2V < VEN < 40 V 5 µA
IFB FB bias current VADJ = VFB = 5 V 0.5 µA
(1) The tracking accuracy is specified when the FB pin is directly connected to the OUT pin which means VADJ = VOUT, external resistor divider variance is not included.
(2) Measured when the output voltage, VOUT has dropped 10 mV from the nominal value.

6.6 Typical Characteristics

VIN = 14 V, VADJ = 5 V, VFB = VOUT, unless otherwise specified
TPS7B4253-Q1 D004_slvscp3.gif
Figure 1. Tracking Accuracy vs Ambient Temperature
TPS7B4253-Q1 D006_slvscp3.gif
Figure 3. Load Regulation
TPS7B4253-Q1 D008_slvscp3.gif
VIN = VADJ = 4 V IOUT = 200 mA
Figure 5. Dropout Voltage vs Ambient Temperature
TPS7B4253-Q1 D009_slvscp3.gif
Figure 7. Shutdown Current vs Ambient Temperature
TPS7B4253-Q1 D011_slvscp3.gif
Figure 9. Quiescent Current vs Ambient Temperature
TPS7B4253-Q1 D013_slvscp3.gif
C(OUT) = 10 µF IOUT = 1 mA TA = 25°C
Figure 11. PSRR
TPS7B4253-Q1 D002_slvscp3.gif
VFB = VOUT
Figure 13. ESR Stability vs Load Capacitance
TPS7B4253-Q1 D015_slvscp3.gif
Figure 15. ESR Stability vs Load Capacitance (Multiple Output Capacitors)
TPS7B4253-Q1 transient_6-40V_line_100mA_falling_slvscp3.gif
VIN = 40 to 6 V VADJ = 5 V C(OUT) = 10 µF
IOUT = 100 mA, 20 µs/div
Figure 17. 40- to 6-V Line Transient
TPS7B4253-Q1 transient_6-40V_line_10mA_falling_slvscp3.gif
VIN = 40 to 6 V VADJ = 5 V C(OUT) = 10 µF
IOUT = 10 mA, 20 µs/div
Figure 19. 40- to 6-V Line Transient
TPS7B4253-Q1 transient_10-100mA_load_falling_slvscp3.gif
VIN = 14 V VADJ = 5 V C(OUT) = 10 µF
IOUT = 100 to 10 mA, 40 µs/div
Figure 21. 100- to 10-mA Load Transient
TPS7B4253-Q1 D005_slvscp3.gif
Figure 2. Line Regulation
TPS7B4253-Q1 D007_slvscp3.gif
VIN = VADJ = 4 V
Figure 4. Dropout Voltage vs Output Current
TPS7B4253-Q1 D003_slvscp3.gif
Figure 6. Current Limit (IO(lim)) vs Ambient Temperature
TPS7B4253-Q1 D010_slvscp3.gif
Figure 8. Quiescent Current vs Output Current
TPS7B4253-Q1 D012_slvscp3.gif
VADJ = VEN = 5 V
Figure 10. Quiescent Current vs Input Voltage
TPS7B4253-Q1 D014_slvscp3.gif
C(OUT) = 10 µF IOUT = 100 mA TA = 25°C
Figure 12. PSRR
TPS7B4253-Q1 D001_slvscp3.gif
VFB < VOUT
Figure 14. ESR Stability vs Load Capacitance
TPS7B4253-Q1 transient_6-40V_line_100mA_rising_slvscp3.gif
VIN = 6 to 40 V VADJ = 5 V C(OUT) = 10 µF
IOUT = 100 mA, 20 µs/div
Figure 16. 6- to 40-V Line Transient
TPS7B4253-Q1 transient_6-40V_line_10mA_rising_slvscp3.gif
VIN = 6 to 40 V VADJ = 5 V C(OUT) = 10 µF
IOUT = 10 mA, 20 µs/div
Figure 18. 6- to 40-V Line Transient
TPS7B4253-Q1 transient_10-100mA_load_rising_slvscp3.gif
VIN = 14 V VADJ = 5 V C(OUT) = 10 µF
IOUT = 10 to 100 mA, 40 µs/div
Figure 20. 10- to 100-mA Load Transient