Datasheet

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TPS62736

10 PH

22PF

OUT

4.7

F

> 90% at

OUT

= 15 P

OUT

100

0.001 0.01 0.1 1 10 100

Iout (mA)

Efficiency (%)

Test Conditions:

V = 2.5V, V = 3V,

O IN

T = 25 C, L = 10 H (Toko DFE252012C)

G000

TPS62736

TPS62737

www.ti.com

SLVSBO4B –OCTOBER 2012–REVISED JULY 2013

Programmable Output Voltage Ultra-Low Power Buck Converter with up to 50mA / 200 mA

Output Current

Check for Samples: TPS62736, TPS62737

FEATURES

APPLICATIONS

• Industry's highest efficiency at low output • Ultra Low Power Applications

currents: > 90% with I

OUT

= 15 µA

• 2-Cell and 3-Cell Alkaline-Powered

• Ultra-Low Power Buck Converter Applications

– TPS62736 Optimized for 50 mA Output • Energy Harvesting

Current

• Solar Charger

– TPS62737 Optimized for 200mA Output

• Thermal Electric Generator (TEG) Harvesting

Current

• Wireless Sensor Networks (WSN)

– 1.3 V – 5 V Resistor Programmable Output

• Low Power Wireless Monitoring

Voltage Range

• Environmental Monitoring

– 2 V – 5.5 V Input Operating Range

• Bridge and Structural Health Monitoring (SHM)

– 380 nA / 375 nA Quiescent Current During

• Smart Building Controls

Active Operation for TPS62736 / TPS62737

• Portable and Wearable Health Devices

– 10 nA Quiescent Current During Ship Mode

• Entertainment System Remote Controls

Operation

– 2% Voltage Regulation Accuracy

• 100% Duty Cycle (Pass Mode)

• EN1 and EN2 Control

– Two Power off states:

– 1) Shipmode (full power off state)

– 2) Standby mode includes VIN_OK

Indication

• Input Power Good Indication (VIN_OK)

– Push-pull Driver

– Resistor Programmable Threshold Level

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.

UNLESS OTHERWISE NOTED this document contains

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (35 pages)

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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 Programmable Output Voltage Ultra-Low Power Buck Converter with up to 50mA / 200 mA Output Current Check for Samples: TPS62736, TPS62737 FEATURES APPLICATIONS • • • 1 • • • • • • • • • • • • • 100 95 TPS62736 90 85 80 75 70 65 Test Conditions: VO = 2.5V, VIN = 3V, TA = 25oC, L = 10mH (Toko DFE252012C) 60 55 0.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. DESCRIPTION The TPS6273X family provides a highly integrated ultra low power buck converter solution that is well suited for meeting the special needs of ultra low power applications such as energy harvesting.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 THERMAL INFORMATION RGY THERMAL METRIC (1) θJA Junction-to-ambient thermal resistance 33.7 θJCtop Junction-to-case (top) thermal resistance 37.6 θJB Junction-to-board thermal resistance 10.1 ψJT Junction-to-top characterization parameter 0.4 ψJB Junction-to-board characterization parameter 10.3 θJCbot Junction-to-case (bottom) thermal resistance 2.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com ELECTRICAL CHARACTERISTICS (continued) Over recommended ambient temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply for conditions of VIN = 4.2 V, VOUT = 1.8 V External components, CIN = 4.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 PIN ASSIGNMENTS IN NC TPS62736 RGY PACKAGE (TOP VIEW) 1 14 NC 2 13 SW NC 3 12 VSS NC 4 11 OUT EN1 5 10 VIN_OK EN2 6 9 VOUT_SET 8 VRDIV VIN_OK_SET 7 PIN DESCRIPTION PIN NO.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com IN NC TPS62737 RGY PACKAGE (TOP VIEW) 1 14 SW 2 13 SW VSS 3 12 VSS NC 4 11 OUT EN1 5 10 VIN_OK EN2 6 9 VOUT_SET 8 VRDIV VIN_OK_SET 7 PIN DESCRIPTION PIN NO.
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TPS62736 TPS62737 www.ti.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com TYPICAL APPLICATION SCHEMATIC TPS62736 IN VIN CIN1 CIN2 4.7PF 0.1PF SW L 10 PH System Load OUT Buck Controller GPIO1 VIN_OK GPIO2 EN1 GPIO2 EN2 22PF COUT VSS Host VRDIV R3 R2 VOUT_SET VIN_OK_SET Nano-Power Management R1 Figure 1. Typical Application Circuit for a 3-resistor String TPS62737 IN VIN CIN1 CIN2 22PF 0.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 TPS62736 IN VIN CIN1 CIN2 4.7PF 0.1PF SW L 10 PH System Load OUT 22PF Buck Controller GPIO1 VIN_OK GPIO2 EN1 GPIO2 EN2 COUT VSS Host VRDIV R3 VOUT_SET R2 R4 VIN_OK_SET Nano-Power Management R1 Figure 3. Typical Application Circuit for a 4-resistor String TPS62736 IN VIN CIN1 CIN2 4.7PF 0.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com TYPICAL CHARACTERISTICS Table of Graphs for TPS62736 Unless otherwise noted, graphs were taken using Figure 1 with L = Toko 10 µH DFE252012C VO = 2.5 V Efficiency η VO = 1.8 V Efficiency VO = 1.3 V Efficiency VO = 2.5 V VOUT (DC) VO = 1.8 V VO = 1.3 V Figure 5 vs. Input Voltage Figure 6 vs. Output Current Figure 7 vs. Input Voltage Figure 8 vs. Output Current Figure 9 vs. Input Voltage Figure 10 vs.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 100 100 IO =Series1 0.1 mA IO =Series2 1 mA IO =Series4 10 mA IO =Series5 45 mA 95 98 90 Efficiency (%) Efficiency (%) 85 80 75 70 65 60 55 50 0.001 VSeries2 IN = 4.2 V VSeries4 IN = 3.6 V VSeries5 IN = 3 V VSeries6 IN = 2.7 V Test Conditions: VO = 2.5 V, TA = 25C L = 10 µH (Toko DFE252012C) 0.01 0.1 1 10 IOUT (mA) 2.0 4.0 4.5 IO = 0.1 mA Series1 96 75 70 65 60 Series1 VIN = 4.2 V 0.01 0.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com 2.520 2.6 2.5 2.515 2.510 VOUT (V) VOUT (V) 2.4 2.505 2.2 2.1 2.500 2.495 0.001 IO =Series1 0.1 mA Series2 VIN = 4.2 V Test Conditions: VIN = 3.6 V VO = 2.5 V, TA = 25C Series1 VIN =3V L = 10 µH (Toko DFE252012C) Series4 VIN = 2.7 V Series5 0.01 0.1 1 10 2.0 IO =Series4 10 mA IO =Series5 45 mA 1.8 100 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VIN (V) C007 Figure 11. Output Voltage vs Output Current. VOUT = 2.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 1.303 1.305 1.301 1.3 VOUT (V) 1.297 1.295 1.293 1.291 1.289 0.001 VIN = 4.2 V Series1 Test Conditions: VIN =3V Series2 VO = 1.3 V, TA = 25C VIN = 3.6 V L = 10 uH (Toko DFE252012C) Series4 VIN = 2.1 V Series5 0.01 0.1 1 1.29 IO =Series1 0.1 mA IO =Series2 1 mA IO =Series4 10 mA IO =Series5 45 mA 1.285 1.28 10 100 IOUT (mA) 2.0 2.5 Test Condition: VO = 1.3 V, TA = 25C L = 10 µH (Toko DFE252012C) 3.0 3.5 4.0 4.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 450 1200 350 300 Input Quiescent Current (nA) = 85°C 85C TT A= TT = 55°C 55C A= TT = 25°C 25C A= 0C TTA = 0°C TTA ±40°C -40 C A == 400 Input Quiescent Current (nA) www.ti.com 250 200 150 100 TT=85C A = 85°C TT=55C A = 55°C 1000 TT=25C A = 25°C TT=0C A = 0°C TTA ±40°C -40 C A == 800 600 400 200 50 0 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 2.0 5.5 Input Quiescent Current (nA) Input Quiescent Current (nA) 800 600 400 200 4.5 5.0 5.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 30 Output Voltage Ripple (mVPP) Output Voltage Ripple (mVPP) 25 20 15 10 VIN = 2 V Vin Vin VIN = 3 V 5 Vin VIN = 4 V VO = 1.3 V C = 22 PF 0 10 20 30 40 50 IOUT = 1 mA I=1mA 25 IOUT = 10 mA I=10mA IOUT = 50 mA I=50mA 20 15 10 Vin VIN = 5 V 0 IOUT = 100 A Iout=100uA 5 VO = 1.3 V C = 22 PF 0 2.0 60 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) C025 Output Current (mA) Figure 29.
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TPS62736 TPS62737 40 ms/div IOUT VOUT-AC SW 10 Ps/div Figure 36. Load Transient Response 2 V/div 2 V/div 2 V/div 5 V/div Figure 35. Line Transient Response 2 V/div 100 mA/div IOUT VOUT 2 V/div SW EN1 VIN_OK VOUT SW 20 ms/div 4 Ps/div Figure 37. IR Pulse Transient Response 2 V/div 2 V/div 2 V/div 5 V/div 50 mA/div 20 mV/div VOUT-AC IL 5 V/div 50 mA/div www.ti.com VIN 10 mV/div 2 V/div SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 Figure 38.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 Table of Graphs for TPS62737 Unless otherwise noted, graphs were taken using Figure 2 with L = Toko 10 µH DFE252012C VO = 2.5 V Efficiency η VO = 1.8 V Efficiency VO = 1.3 V Efficiency VO = 2.5 V VOUT (DC) VO = 1.8 V VO = 1.3 V vs. Output Current Figure 40 vs. Input Voltage Figure 41 vs. Output Current Figure 42 vs. Input Voltage Figure 43 vs. Output Current Figure 44 vs. Input Voltage Figure 45 vs.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com 100.0 100 90 95.0 Efficiency (%) Efficiency (%) 80 70 60 = 5.5 V VVIN IN = 3.0 V 50 40 0.001 85.0 80.0 VVIN 2.5VV IN ==5.5 0.01 0.1 1 10 100 75.0 2.5 1000 3 3.5 100 95 90 Efficiency (%) 70 VIN 2.5VV V IN ==2.5 60 VIN 3.0VV V IN ==3.0 VIN 3.6VV V IN ==3.6 50 V VIN 5.5VV IN ==5.5 0.1 1 10 100 0.01mA mA IIO O ==0.01 0.1mA mA IIO O ==0.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 2.53 2.54 2.52 2.52 2.5 2.48 VOUT (V) VOUT (V) 2.51 2.5 2.49 2.48 2.47 2.46 0.001 2.46 2.44 VIN = 3.0 V V IN = 3.0 V VIN =3.6 3.6VV V = IN 2.42 VIN 4.2VV V IN ==4.2 2.38 V VIN 5.5VV IN ==5.5 0.01 = 0.001 IIO O = 0.001 mA 0.1mA mA IIO O ==0.1 10mA mA IIO O ==10 IIO 170mA mA O ==170 2.4 2.36 0.1 1 10 100 1000 IOUT (mA) 2.5 3 3.5 4 = 0.01 mA IIO O = 0.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com 1.335 1.33 1.325 1.33 1.32 1.315 1.31 1.32 VOUT (V) VOUT (V) 1.325 1.315 VIN = 2.5 V V IN = 2.5 V 1.31 1.28 VIN 4.2VV V IN ==4.2 1.295 0.001 1.275 VIN 5.5VV V IN ==5.5 0.01 1.27 0.1 1 10 100 1000 IOUT (mA) 3 4 5 VIN (V) C059 C056 Figure 53. Output Voltage vs Input Voltage, VOUT = 1.3 V 1.325 300 Maximum Output Current (mA) IO = 1 mA 1.315 Output Voltage (V) 2 = 0.01 mA IIO O = 0.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 500 400 350 Input Quiescent Current (nA) Input Quiescent Current (nA) 1,200 o C = 85 TTA A = 85 C oC TTA 2525 C A == oC TTA = 0 A = 0 C o TTA A = =-40 -40CC 450 300 250 200 150 100 1,000 800 TA = 85oC 600 TA = 0oC TA = 25oC 400 200 50 0 2 2.5 3 3.5 4 4.5 5 Input Voltage (V) 5.5 2 3 3.5 4 4.5 5 Input Voltage (V) 5.5 C055 Figure 59. Input Quiescent Current vs.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com 200 mA 50 mV 60 IO = 100 mA IO = 5 mA IO = 10 mA SW 2V 50 40 IO = 50 mA 20 IO = 500 PA 0 2.1 2.6 3.1 3.6 4.1 4.6 IL VOUT VIN 47.5 mV 30 10 SW 5.1 Input Voltage (V) 1 ms/div C052 Figure 64. Output Voltage Ripple vs Input Voltage Figure 65. Steady State Operation with RO = 100 kΩ IL 200 mAV/div VOUT 2 V/div VIN 2 V/div 50 mV/div IL VOUT VIN 1.9 V 47.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 VOUT VOUT VIN VIN-OK 2 V/div 1 V/div SW 5 μs/div 10 s/div 2 V/div EN2 VIN-OK VIN-OK VOUT 1 V/div VOUT VSW 2 V/div 1 V/div Figure 71. Startup Behavior with Slow Ramping VIN, EN1=0, EN2=1 2 V/div EN1 2 V/div 2 V/div Figure 70. IR Pulse Transient Response 2 V/div 1 V/div 1 V/div 1 V/div 100 mA/div IOUT VSW 200 μs/div 20 ms/div Figure 72. Ship-Mode Startup Behavior Figure 73.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com DETAILED PRINCIPLE OF OPERATION Step Down (Buck) Converter Operation The buck regulator in the TPS6273X takes input power from VIN, steps it down and provides a regulated voltage at the OUT pin. It employs pulse frequency modulation (PFM) control to regulate the voltage close to the desired reference voltage. The reference voltage is set by the user programmed resistor divider.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 æ R + R4 ö VOUT = VBIAS ç 3 ÷ è R4 ø (3) The VIN_OK setting is then given by Equation 4: æ R + R2 ö VIN _ OK = VBIAS ç 1 ÷ è R1 ø (4) If it is preferred to disable the VIN_OK setting, the VIN_OK_SET pin can be tied to VIN as shown in Figure 4. To set VOUT in this configuration, use Equation 3. To tighten the dc set point accuracy, use external resistors with better than 1% resistor tolerance.
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TPS62736 TPS62737 SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 www.ti.com The minor switching frequency is of concern when choosing the inductor. This maximum switching frequency is 1 MHz. The major switching frequency dictates the voltage ripple frequency. Figure 27 and Figure 28 show the major switching frequency versus load current and input voltage for the TPS62736, respectively.
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TPS62736 TPS62737 www.ti.com SLVSBO4B – OCTOBER 2012 – REVISED JULY 2013 In order to maximize efficiency at light load, the use of voltage level setting resistors > 1MΩ is recommended. However, during board assembly, contaminants such as solder flux and even some board cleaning agents can leave residue that may form parasitic resistors across the physical resistors and/or from one end of a resistor to ground, especially in humid, fast airflow environments.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 21-Jul-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Jul-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing TPS62736RGYR VQFN RGY 14 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 330.0 12.4 3.75 3.75 1.15 8.0 12.0 Q1 TPS62736RGYT VQFN RGY 14 250 180.0 12.4 3.75 3.75 1.15 8.0 12.0 Q1 TPS62737RGYR VQFN RGY 14 3000 330.0 12.4 3.75 3.75 1.15 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Jul-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS62736RGYR VQFN RGY 14 3000 367.0 367.0 35.0 TPS62736RGYT VQFN RGY 14 250 210.0 185.0 35.0 TPS62737RGYR VQFN RGY 14 3000 367.0 367.0 35.0 TPS62737RGYT VQFN RGY 14 250 210.0 185.0 35.
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