SLIS132A October   2008  – March 2015 TPS55065-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 Dissipation Ratings
    6. 6.6 Electrical Characteristics
    7. 6.7 Switching Characteristics
    8. 6.8 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  Switched-Mode Input/Output Terminals (L1, L2)
      2. 7.3.2  Supply Terminal (Vdriver)
      3. 7.3.3  Internal Supply Decoupling Terminal (Vlogic)
      4. 7.3.4  Input Voltage Monitoring Terminal (AIN)
      5. 7.3.5  Input Undervoltage Alarm Terminal (AOUT)
      6. 7.3.6  Reset Delay Timer Terminal (REST)
      7. 7.3.7  Reset Terminal (RESET)
      8. 7.3.8  Main Regulator Output Terminal (VOUT)
      9. 7.3.9  Low-Power-Mode Terminal (CLP)
      10. 7.3.10 Switch-Output Terminal (5Vg)
      11. 7.3.11 5Vg-Enable Terminal (5Vg_ENABLE)
      12. 7.3.12 Slew-Rate Control Terminals (SCR0, SCR1)
      13. 7.3.13 Modulator Frequency Setting (Terminal Rmod)
      14. 7.3.14 Ground Terminal (PGND)
      15. 7.3.15 Enable Terminal (ENABLE)
      16. 7.3.16 Bootstrap Terminals (CBOOT1 and CBOOT2)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Clock Modulator
      2. 7.4.2 Buck/Boost Transitioning
      3. 7.4.3 Buck SMPS
      4. 7.4.4 Boost SMPS
      5. 7.4.5 Extension of the Input Voltage Range on V(driver)
      6. 7.4.6 Low-Power Mode
      7. 7.4.7 Temperature and Short-Circuit Protection
      8. 7.4.8 Switch Output Terminal (5Vg) Current Limitation
      9. 7.4.9 Soft Start
  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 Buck Mode
        2. 8.2.2.2 Boost Mode
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Inductor
      2. 10.1.2 Filter Capacitors
      3. 10.1.3 Traces and Ground Plane
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)
MIN MAX UNIT
V(driver)(2) Unregulated input voltage, –0.5 40 V
V(AIN), V(ENABLE)(2) Unregulated inputs –0.5 40 V
V(Cboot1) Bootstrap voltages 52 V
V(Cboot2) 14 V
V(L1) Switch mode voltages –1 40 V
V(L2) –1 7 V
V(Rmod),V(SCR0),V(SCR1),V(CLP), and V(5Vg_ENABLE) (2) Logic input voltages –0.5 7 V
V(RESET),V(AOUT),V(logic), and V(REST)(2) Low output voltages –0.5 7 V
PD Continuous power dissipation SeeDissipation Ratings
TJ Operating virtual junction temperature –40 150 °C
TA Operating ambient temperature –40 125 °C
Tstg Storage temperature –65 125 °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 ground.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per AEC Q100-002(1)(2) Classification 1B for pin 7, pin 8, pin 9 ±800 V
Classification 2 for pins 1 to 6 and 10 to 20 ±2000
Charged device model (CDM), per AEC Q100-011 Classification Level C4B for All pins ±750
(1) AEC Q100-002 indicates HBM stressing is done in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
(2) The human body model is a 100-pF capacitor discharged through a 1.5-kΩ resistor into each terminal.

6.3 Recommended Operating Conditions

MIN NOM MAX UNIT
Unregulated input voltage, V(driver) 6 24 V
Unregulated input voltages, V(AIN) and V(ENABLE) 0 24 V
Switched-mode terminals V(L1) –1 17 V
V(L2) 5 5.5
Bootstrap voltages V(Cboot1) V(driver) + 10 V
V(Cboot2) 8
Logic levels (I/O), V(Rmod), V(logic),V(SCR0),V(SCR1),V(5Vg_ENABLE),V(RESET), V(AOUT), V(CLP), and V(REST) 0 5.25 V
Operating ambient temperature range, TA –40 125 °C
Logic levels (I/O), V(SCR0), V(SCR1), V(CLP) directly connected to V(logic) V(logic) V(logic) V

6.4 Thermal Information

THERMAL METRIC(1) TPS55065-Q1 UNIT
PWP [HTSSOP]
20 PINS
RθJA Junction-to-ambient thermal resistance 37.9 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 22.7
RθJB Junction-to-board thermal resistance 20.2
ψJT Junction-to-top characterization parameter 0.7
ψJB Junction-to-board characterization parameter 19.9
RθJC(bot) Junction-to-case (bottom) thermal resistance 1.8
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

6.5 Dissipation Ratings

RθJA POWER RATING
TA ≤ 25°C		 DERATING FACTOR ABOVE
TA = 25°C		 POWER RATING
TA = 85°C		 POWER RATING
TA = 125°C
32°C/W 3.9 W 31.25 mW/°C 2.03 W 0.781 W
40°C/W 3.125 W 25 mW/°C 1.625 W 0.625 W

6.6 Electrical Characteristics

V(driver) = 6 V to 17 V, TA = -40°C to 125°C, unless otherwise noted
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V(driver) Unregulated input voltage 1.5 40 V
V(driver) Start-up condition voltage IO = 500 mA 5 V
SOM Soft-start ramp CO = 36 μF (minimum) to 220 μF (maximum) 4 20 V/ms
CO = 220 μF (min) to 470 μF (max), see Note (1) 2 20
I(standby) Standby current ENABLE = low 10 20 μA
Iq Quiescent current CLP = 0 V, V(driver) = 11 V, IO = 0 mA 100 160 μA
VO Output voltage DC 5 V
VO Output-voltage tolerance Normal mode 2%
Boost/buck crossover or low-power mode 3%
IO Output current V(driver) ≥ 7 V 0.5 A
IO(Boost) Output current, boost mode V(driver) = 2 V, see Note (2) 200 mA
V(driver)= 1.5 V, see Note (2) 120
IPPn Internal peak current limit (normal mode) See (1) 1.75 2.5 A
IPPl Internal peak current limit (low-power mode) See (1) 0.75 1.25 A
IP Peak current V(driver) = 16 V, IO = 500 mA, L = 33 μH 1.5 A
V(driver) Boost/buck crossover voltage window See (3) 5 5.9 V
Tot Thermal shutdown(4) 160 180 200 °C
5Vg OUTPUT AND ENABLE
rDS(on) On-state resistance 135 225 mΩ
IO Output current 400 mA
VI 5Vg_ENABLE input-voltage range –0.5 VO V
VIH 5Vg_ENABLE threshold high voltage V(5Vg) = 5 V 2.5 3 3.5 V
VIL 5Vg_ENABLE threshold low voltage V(5Vg) = 0 V 1.5 2 2.5 V
V(hys) Hysteresis voltage 0.5 1 V
r(pd) Internal pulldown resistor 300 500 850 kΩ
ENABLE
VI ENABLE input-voltage range –0.5 40 V
VIH ENABLE threshold high voltage 8 V ≤ V(driver) ≤ 17 V 2.5 3 3.5 V
6 V ≤ V(driver) < 8 V 1.9 3 3.5
VIL ENABLE threshold low voltage VO = 5 V 1.5 2 2.5 V
V(hys) Hysteresis voltage 8 V ≤ V(driver) ≤ 17 V 0.5 1 V
6 V ≤ V(driver) < 8 V 0.1
RESET
V(th) RESET threshold voltage 4.51 4.65 4.79 V
V(RESET) RESET tolerance 3%
t(RESET) RESET time C(REST) = 10 nF 8 10 12 ms
C(REST) = 100 nF, see (1) 80 100 120
VOL RESET output low voltage Isink = 5 mA 450 mV
Isink = 1 mA 84
t(deglitch) RESET deglitch time See (1) 8 10 12.5 μs
ALARM
VI Alarm input-voltage range –0.5 40 V
VIL Alarm threshold low voltage 2.2 2.3 2.35 V
VIH Alarm threshold high voltage 2.43 2.5 2.58 V
V(hys) Hysteresis voltage 200 mV
VOL Alarm output low voltage Isink = 5 mA 450 mV
Isink = 1 mA 84
LOW-POWER MODE (PULSE MODE) PFM
IO(LPM) Load current in low-power mode V(driver) < 7 V 50 mA
II(avg) Average input current V(driver) = 11 V, IO = 5 mA, CLP = low 3.55 mA
VO Output-voltage tolerance VO = 5 V 2.4% 3%
DIGITAL LOW-POWER MODE (CLP)
VIH High-level CLP input threshold voltage Normal mode 2.6 V
VIL Low-level CLP input threshold voltage Low-power mode 1.15 V
(1) Ensured by characterization.
(2) Tested with inductor having following characteristics: L = 33 μH, Rmax = 0.1 Ω, IR = 1.8 A. Output current must be verified in application when inductor Rmax (ESR) is increased.
(3) Ensured by characterization. For further details, see Buck/Boost Transitioning.
(4) Ensured by characterization; hysteresis 15°C (typical)

6.7 Switching Characteristics

over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
f(sw) Switching frequency V(Rmod) = 0 V, modulator OFF 440 kHz
f(sw)ac Operating-frequency accuracy f(sw) = 440 kHz 20%
f(sw)min Modulation minimum frequency 270 330 445 kHz
f(sw)max Modulation maximum frequency 450 550 680 kHz
f(mod)span Modulation span 220 kHz
f(mod) Modulation frequency Rmod = 12 kΩ ±1% 28 kHz
f(mod)ac Modulation-frequency accuracy 12%

6.8 Typical Characteristics

(Reference L1 Terminal, see Figure 8 through Figure 10)
TPS55065-Q1 slis122_g001.gif
Maximum characteristic specified by design.
Figure 1. Low-Power Mode Current, IO = 0 mA–10 mA
TPS55065-Q1 slis122_g005.gif
Figure 3. Input Current with Slope Control, SCR0 = 0,
SCR1 = 0, Input-Current Slew Rate = 2.8 A/µs, IL = 500 mA,
V(driver) = 15 V
TPS55065-Q1 slis122_g011.gif
Figure 5. Input Current with Slope Control, SCR1 = 1, SCR0 = 0, Input-Current Slew Rate = 9.4 A/µs, IL = 500 mA, V(driver) = 15 V
TPS55065-Q1 slis122_g009.gif
Figure 7. Low-Power-Mode Operation, IL = 15 mA,
CO = 47 µF
TPS55065-Q1 slis122_g006.gif
Figure 9. Maximum Switching Frequency (555 kHz)
With Modulation Enabled, Rmod = 12 kΩ, IL = 200 mA
TPS55065-Q1 vin_excursions_lis132.gif
Figure 11. Input Voltage Excursions (Similar to Low-Crank Conditions)
TPS55065-Q1 slis122_g012.gif
Figure 13. Nominal Switching Frequency of Q1 Switch
(446 kHz) With Modulation Function Disabled, IL = 200 mA
TPS55065-Q1 slis122_g017.gif
These values represent conducted EMI results of a test board for display purposes only. Actual results may vary greatly depending on board layout and external components and must be verified in actual application.
Figure 15. Conducted Emissions on Test Board Showing Effects of Switching-Frequency Modulation
TPS55065-Q1 lpm_io_0_1ma_lis132.gif
Maximum characteristic specified by design.
Figure 2. Low-Power-Mode Current, IO = 0 mA–1 mA
TPS55065-Q1 slis122_g010.gif
Figure 4. Input Current with Slope Control, SCR1 = 0,
SCR0 = 1, Input-Current Slew Rate = 6.25 A/µs,
IL = 500 mA, V(driver) = 15 V
TPS55065-Q1 slis122_g008.gif
Figure 6. Input Current With Slope Control, SCR0 = 1, SCR1 = 1, Input-Current Slew Rate = 18.8 A/µs, IL = 500 mA, V(driver) = 15 V
TPS55065-Q1 slis122_g013.gif
Figure 8. Minimum Switching Frequency (333 kHz)
with Modulation Enabled, Rmod = 12 kΩ, IL = 200 mA
TPS55065-Q1 slis122_g007.gif
Figure 10. Modulation Frequency (Full Span) of 28 kHz
TPS55065-Q1 slis122_g015.gif
Figure 12. Switched-Mode Regulator Transition from Buck Mode to Boost Mode, IL = 400 mA
TPS55065-Q1 slis122_g016.gif
Figure 14. Switched-Mode Regulator Transition from Boost Mode to Buck Mode, IL = 400 mA
TPS55065-Q1 slis122_g018.gif
These values represent conducted EMI results of a test board for display purposes only. Actual results may vary greatly depending on board layout and external components and must be verified in actual application.
Figure 16. Conducted Emissions on Test Board Showing Effects of Minimum and Maximum Slew Rate Settings