The TPS54062 device is a 60 V, 50-mA, synchronous step-down converter with integrated high side and low side MOSFETs

TPS54062

Manufacturer Part NumberTPS54062
DescriptionThe TPS54062 device is a 60 V, 50-mA, synchronous step-down converter with integrated high side and low side MOSFETs
ManufacturerTexas Instruments
TPS54062 datasheet
 


Specifications of TPS54062

Iout(max)(a)0.05Vin(min)(v)4.7
Vin(max)(v)60Vout(min)(v)0.8
Vout(max)(v)58Iq(typ)(ma)0.089
Switching Frequency(max)(khz)400Switch Current Limit(typ)(a)0.13
TopologyBuckOperating Temperature Range(c)-40 to 125
Pin/package8MSOP, 8SONDuty Cycle(max)(%)98
Regulated Outputs(#)1  
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4.7V to 60V Input, 50mA Synchronous Step-Down Converter with
FEATURES
1
Integrated High Side and Low Side MOSFET
2
Peak Current Mode Control
89 µA (typical) Operating Quiescent Current
100 kHz to 400 kHz Switching Frequency
Synchronizes to External Clock
Internal Slow Start
0.8 V ±2% Voltage Reference
Stable with Ceramic Output Capacitors or Low
Cost Aluminum Electrolytic
Cycle-by-Cycle Current Limit, Thermal and
Frequency Fold Back Protection
MSOP-8 and VSON-8 Packages
APPLICATIONS
Low Power Standby or Bias Voltage Supplies
4-20 mA Current-Loop Powered Sensors
Industrial Process Control, Metering, and
Security Systems
High Voltage Linear Regulator Replacement
spacer
SIMPLIFIED SCHEMATIC
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SwitcherPro is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011
Low IQ
Check for Samples:
TPS54062
DESCRIPTION
The TPS54062 device is a 60 V, 50-mA, synchronous
step-down converter with integrated high side and low
side MOSFETs. Current mode control provides
simple external compensation and flexible component
selection. The non-switching supply current is 89 µA.
Using the enable pin, shutdown supply current is
reduced to 1.7 µA.
Under voltage lockout is internally set at 4.5 V, but
can be increased using the accurate enable pin
threshold. The output voltage startup ramp is
controlled by the internal slow start time.
Adjustable
switching
efficiency and external component size to be
optimized.
Frequency
shutdown protects the part during an overload
condition.
100
V
= 3.3V
OUT
90
f
= 400kHz
SW
80
70
60
50
40
30
20
10
0
0
0.01
TPS54062
frequency
range
allows
fold
back
and
thermal
EFFICIENCY
V
= 10V
IN
V
= 24V
IN
0.02
0.03
0.04
0.05
Output Current (A)
G050
Copyright © 2011, Texas Instruments Incorporated

TPS54062 Summary of contents

  • Page 1

    ... SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 Low IQ Check for Samples: TPS54062 DESCRIPTION The TPS54062 device 50-mA, synchronous step-down converter with integrated high side and low side MOSFETs. Current mode control provides simple external compensation and flexible component selection. The non-switching supply current is 89 µA. ...

  • Page 2

    ... For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. (2) The DGK and DRB packages are also available taped and reeled. Add an R suffix to the device type (i.e., TPS54062DGKR). PIN CONFIGURATION ...

  • Page 3

    ... Shutdown Shutdown Logic Enable Threshold Boot Minimum UVLO Clamp PWM Comparator Deadtime Control Logic Slope Compensation Frequency Shift Oscillator with PLL RT CLK / Product Folder Link(s): TPS54062 TPS54062 VIN UVLO Boot Charge Current Sense BOOT PH DRV REG ZX detect GND Submit Documentation Feedback 3 ...

  • Page 4

    ... V –0 – –0 Internally Limited A 100 µA 100 mA 10 µA µA 100 Internally Limited A 200 µ 500 V –40 125 ºC –65 ºC 150 TPS54062 UNITS MSOP-8 VSON-8 127.1 40.2 33.4 49.7 80 15.7 °C/W 1 0.6 79 15.9 n/a 4.1 Copyright © 2011, Texas Instruments Incorporated ...

  • Page 5

    ... Minimum Current Limit OUT < 2µ (COMP) (COMP) < 2µ 1V, VSENSE = 0.4V (COMP) (COMP) = 1V, 100 mV Overdrive = 510kΩ = 510kΩ Product Folder Link(s): TPS54062 TPS54062 SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 MIN TYP MAX UNIT 4 1.7 µA 89 110 µA 1.24 1 ...

  • Page 6

    ... BOOT-PH UVLO INTERNAL SLOW START TIME Slow start time Submit Documentation Feedback (1) (continued) CONDITIONS = 50mA OUT = 50mA, One transition OUT = 240kHz 510kΩ, 10% to 90% Product Folder Link(s): TPS54062 www.ti.com MIN TYP MAX UNIT 120 5.7 V 2.9 V 4.1 ms Copyright © 2011, Texas Instruments Incorporated ...

  • Page 7

    ... Figure 4. Frequency vs VSENSE Voltage 400 350 300 250 200 150 100 100 125 300 G004 Figure 6. Frequency vs RT/CLK Resistance Product Folder Link(s): TPS54062 TPS54062 SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 12V 60V IN − 100 Temperature (°C) ...

  • Page 8

    ... G015 Figure 10. Input Voltage (UVLO) vs Temperature 3.0 2.5 2.0 1.5 1.0 0.5 0 G016 Figure 12. Shutdown Supply Current (VIN) vs Input Product Folder Link(s): TPS54062 www.ti.com VENA Rising VENA Falling − 100 Junction Temperature (°C) UVLO Start UVLO Stop − 100 Junction Temperature (° ...

  • Page 9

    ... Input Voltage (V) Figure 17. Current Limit vs Input Voltage Product Folder Link(s): TPS54062 TPS54062 SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 T = 125 − Input Voltage (V) Figure 14. Supply Current (VIN pin) ...

  • Page 10

    ... SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 OVERVIEW The TPS54062 device mA, step-down (buck) regulator with an integrated high side and low side n-channel MOSFET. To improve performance during line and load transients the device implements a constant frequency, current mode control which reduces output capacitance and simplifies external frequency compensation design ...

  • Page 11

    ... The EN pin has an internal pull-up current source, I1, of 1.2 µA that provides the default condition of the TPS54062 operating when the EN pin floats. Once the EN pin voltage exceeds 1. additional 3.5 µA of hysteresis, Ihys, is added. This additional current facilitates input voltage hysteresis. When the EN pin is pulled below 1.14 V, the 3.5 µ ...

  • Page 12

    ... EN pin. Constant Switching Frequency and Timing Resistor (RT/CLK Pin) The switching frequency of the TPS54062 is adjustable over a wide range from approximately 100 kHz to 400 kHz by placing a resistor on the RT/CLK pin. The RT/CLK pin voltage is typically 0.53 V and must have a resistor to ground to set the switching frequency ...

  • Page 13

    ... ÷ - ´ ´ ø TPS54062 RT/CLK RT/CLK PLL RT Hi-Z Clock Source Product Folder Link(s): TPS54062 TPS54062 SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 Figure 20 through another resistor (e.g., TPS54062 PLL RT Submit Documentation Feedback (5) (6) 13 ...

  • Page 14

    ... SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 Overvoltage Transient Protection The TPS54062 incorporates an overvoltage transient protection (OVTP) circuit to minimize voltage overshoot when recovering from output fault conditions or strong unload transients on power supply designs with low value output capacitance. For example, when the power supply output is overloaded the error amplifier compares the actual output voltage to the internal reference voltage ...

  • Page 15

    ... The typical minimum on time, t TPS54062. For this example, the output voltage is 3.3V and the maximum input voltage which allows for a maximum switch frequency up to 400 kHz when including the inductor resistance, on resistance and diode ...

  • Page 16

    ... L f ø ö ÷ ø Product Folder Link(s): TPS54062 www.ti.com shows the minimum output capacitance is the regulators switching sw = 0.04 × 3.3 = 0.132. OUT Figure is the output current under heavy load, I calculates the maximum ESR an output indicates the ESR should be less Copyright © ...

  • Page 17

    ... The Under Voltage Lock Out (UVLO) can be adjusted using an external voltage divider on the EN pin of the TPS54062. The UVLO has two thresholds, one for power up when the input voltage is rising and one for power down or brown outs when the input voltage is falling. For the example design, the supply should turn on and start switching once the input voltage increases above 7 ...

  • Page 18

    ... Equation 25yields the nearest standard used ´ V gmea ´ REF POLE Product Folder Link(s): TPS54062 www.ti.com Equation 18 and Equation 22, to estimate a starting Equation 22 is the mean of Equation 22 gives 7.36 kHz. Use Equation 23 to set the and ...

  • Page 19

    ... G031 Figure 25. Output Voltage vs Input Voltage 0. 24V IN 0.15 0.10 0.05 0.00 0 0.01 0.02 0.03 Output Current (A) Product Folder Link(s): TPS54062 TPS54062 SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 = 3.3V OUT = 400kHz V = 10V 24V 36V 48V 60V IN 0 ...

  • Page 20

    ... V / div OUT Figure 30. Startup with div (ac coupled div Inductor Current = 100 mA / div Figure 32. Input Ripple in CCM Product Folder Link(s): TPS54062 www.ti.com Time = 20 msec / div Time = 2 msec / div IN Time = 2 µsec / div Copyright © 2011, Texas Instruments Incorporated ...

  • Page 21

    ... div (ac coupled) OUT div Inductor Current = 100 mA / div Figure 34. Output Ripple in DCM div (ac coupled) OUT div Inductor Current = 100 mA / div Figure 36. Output Ripple Skip Product Folder Link(s): TPS54062 TPS54062 Time = 2 µsec / div Time = 50 µsec / div Submit Documentation Feedback 21 ...

  • Page 22

    ... The TPS54062 is designed for applications which require a fixed operating frequency and low output voltage ripple at low output currents, thus, the TPS54062 does not have a pulse skip mode at light loads. Since the device has a minimum controllable on time, there is an output current at which the power supply will pulse skip. ...

  • Page 23

    ... V O 0.5 ö 2 æ ö D1 ÷ ç ÷ ÷ è ø 4 ø Product Folder Link(s): TPS54062 TPS54062 SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 Equation 29 the portion of the Submit Documentation Feedback (26) (27) (28) (29) (30) (31) (32) (33) (34) (35) (36) (37) (38) 23 ...

  • Page 24

    ... gmea REF Fm ´ Product Folder Link(s): TPS54062 www.ti.com 39. To calculate the current mode Equation 40 and Equation Equation 44 is the geometric mean 45. Equation 47 yields 139 Equation 48 Equation 49 yields the nearest Copyright © 2011, Texas Instruments Incorporated 41 ...

  • Page 25

    ... G018 Figure 41. Output Voltage vs Output Current G023 Product Folder Link(s): TPS54062 TPS54062 SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 V = 10V 24V OUT IN 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 Output Current (A) = 24V ...

  • Page 26

    ... Figure 44. Unload Transient Figure 46. Startup With V Figure 48. Prebias Startup With V 26 Submit Documentation Feedback Figure 45. Startup With ENA Figure 47. Prebias Startup With ENA IN Figure 49. Input and Output Ripple in DCM IN Product Folder Link(s): TPS54062 www.ti.com Copyright © 2011, Texas Instruments Incorporated ...

  • Page 27

    ... Copyright © 2011, Texas Instruments Incorporated VOUT Output Capacitor PH BOOT GND VIN COMP EN RT/CLK VSENSE Frequency Set Resistor Figure 51. PCB Layout Example Product Folder Link(s): TPS54062 TPS54062 SLVSAV1A – MAY 2011 – REVISED NOVEMBER 2011 Output Inductor Compensation Network Feedback Resistors Signal VIA Submit Documentation Feedback 27 ...

  • Page 28

    ... Changed the PLL lock in time Unit of Measure From: µA To: µs ......................................................................................... • Changed Equation 22 ......................................................................................................................................................... • Changed Efficiency vs Output Current Graphs, 28 Submit Documentation Feedback REVISION HISTORY Figure 22 and Figure 23 .......................................................................... Product Folder Link(s): TPS54062 www.ti.com Page Copyright © 2011, Texas Instruments Incorporated ...

  • Page 29

    ... Status TPS54062DGKR ACTIVE MSOP TPS54062DRBR ACTIVE SON TPS54062DRBT ACTIVE SON (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. ...

  • Page 30

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing TPS54062DGKR MSOP DGK TPS54062DRBR SON DRB TPS54062DRBT SON DRB PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 8 2500 330.0 12.4 5.3 8 3000 330.0 12.4 3.3 8 250 180.0 12 ...

  • Page 31

    ... Device Package Type TPS54062DGKR MSOP TPS54062DRBR SON TPS54062DRBT SON PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) DGK 8 2500 DRB 8 3000 DRB 8 250 Pack Materials-Page 2 14-Dec-2011 Width (mm) Height (mm) 370.0 355.0 55.0 346.0 346.0 29.0 210.0 185.0 35.0 ...

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    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...