SLVS273A February   2000  – November 2015 TPS60140 , TPS60141

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagrams
    3. 9.3 Feature Description
      1. 9.3.1 Undervoltage Lockout
      2. 9.3.2 Low-Battery Detector (TPS60140 Only)
      3. 9.3.3 Power-Good Detector (TPS60141)
    4. 9.4 Device Functional Modes
      1. 9.4.1 Start-Up Procedure and Shutdown
      2. 9.4.2 Short-Circuit Protection
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Capacitor Selection
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Power Dissipation
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Related Links
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

10 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

10.1 Application Information

The TPS6014x charge pumps provide a regulated 5-V output from a 1.8-V to 3.6-V input voltage range. They can deliver a maximum continuous load current of at least 100 mA at VI = 2 V minimum.

10.2 Typical Application

TPS60140 TPS60141 typ_operating_circuit_slvs273.gif Figure 6. Typical Application Schematic

10.2.1 Design Requirements

Designed specifically for space-critical battery-powered applications, the complete charge pump circuit requires only four external capacitors. The design guideline provides a component selection to operate the device within the Recommended Operating Conditions.

Table 2 shows the list of components for the Application Curves.

Table 2. Components for Application Curves

REFERENCE VALUE DESCRIPTION MANUFACTURER PART NUMBER
C1, C2 2.2 µF Ceramic flying capacitors Taiyo Yuden EMK316BJ225KL-T
CIN 4.7 µF Ceramic input capacitor Taiyo Yuden LMK316BJ475KL-T
COUT 10 µF Ceramic output capacitor Taiyo Yuden JMK316BJ106ML-T
R1 357 kΩ LBI input voltage adjustment E96-Series
R2 619 kΩ LBI input voltage adjustment E96-Series
R3 1 MΩ Pullup resistor for the open-drain output LBO

10.2.2 Detailed Design Procedure

10.2.2.1 Capacitor Selection

The capacitance values of the TPS6014x external capacitors are closely linked to the output current and output ripple requirements. For lowest ripple, low ESR (< 0.1 Ω) capacitors should be used at the input and output of the charge pump.

The input capacitor improves system efficiency by reducing the input impedance. It also stabilizes the input current of the power source. The input capacitor should be chosen according to the power supply used and the distance from the power source to the converter IC. The input capacitor selection also depends on the output ripple requirements. CIN is recommended to be about 2-times to 4-times as large as the flying capacitors. The lower the ESR of the input capacitor CIN, the lower is the output ripple.

The output capacitor COUT can be selected from 2× to 50× larger than the flying capacitor, depending on the ripple tolerance. The larger COUT and the lower its ESR, the lower will be the output voltage ripple.

Generally, the flying capacitors will be the smallest. Only ceramic capacitors are recommended because of their low ESR and because they retain their capacitance at the switching frequency. Be aware that, depending on the material used to manufacture them, ceramic capacitors might lose their capacitance over temperature and voltage. Ceramic capacitors of type X7R or X5R material will keep their capacitance over temperature and voltage, whereas Z5U or Y5V-type capacitors will decrease in capacitance. Table 3 lists recommended capacitor values.

Table 3. Recommended Capacitor Values

IOUT
(mA)		 CIN
(µF)		 C(xF)
(µF)		 COUT
(µF)		 VPPTYP
(mV)
0 − 50 4.7 2.2 4.7 40
0 − 100 4.7 2.2 10 40
0 − 100 4.7 2.2 22 18

If the measured output voltage ripple is too high for the application, improvements can be made. The first step is to increase the capacitance at the output. If the ripple is still too high, the second step would be to increase the capacitance at the input. For lower output currents, lower value flying capacitors can be used. Table 3 and Table 4 lists the manufacturers of recommended capacitors.

Table 4. Recommended Capacitors(1)

MANUFACTURER PART NUMBER CAPACITANCE CASE SIZE TYPE
Taiyo Yuden LMK212BJ105KG−T
EMK316BJ225KL−T
LMK212BJ225MG−T
LMK316BJ475KL−T
JMK316BJ106ML–T
LMK325BJ106MN−T
LMK432226MM−T		 1 µF
2.2 µF
2.2 µF
4.7 µF
10 µF
10 µF
22 µF		 805
1206
805
1206
1206
1210
1812		 Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
AVX 0805ZC105KAT2A
1206ZC225KAT2A		 1 µF
2.2 µF		 805
1206		 Ceramic
Ceramic
(1) Note: Case code compatibility with EIA 535BAAC and CECC30801 molded chips.

Table 5. Recommended Capacitor Manufacturers

MANUFACTURER CAPACITOR TYPE INTERNET SITE
Taiyo Yuden X7R/X5R ceramic http://www.t−yuden.com/
AVX X7R/X5R ceramic http://www.avxcorp.com/

10.2.3 Application Curves

TPS60140 TPS60141 graph_01_slvs273.gif
Figure 7. Efficiency vs Output Current
TPS60140 TPS60141 graph_04_slvs273.gif
Figure 9. Output Voltage vs Output Current
TPS60140 TPS60141 graph_06_slvs273.gif
Figure 11. Output Voltage Ripple
TPS60140 TPS60141 graph_08_slvs273.gif
Figure 13. Output Voltage Ripple
TPS60140 TPS60141 graph_10_slvs273.gif
Figure 15. Output Voltage Ripple Amplitude vs
Output Current
TPS60140 TPS60141 graph_13_slvs273.gif
Figure 17. Line Transient Response
TPS60140 TPS60141 graph_02_slvs273.gif
Figure 8. Efficiency vs Input Voltage
TPS60140 TPS60141 graph_05_slvs273.gif
Figure 10. Output Voltage vs Input Voltage
TPS60140 TPS60141 graph_07_slvs273.gif
Figure 12. Output Voltage Ripple
TPS60140 TPS60141 graph_09_slvs273.gif
Figure 14. Output Voltage Ripple Amplitude vs
Input Voltage
TPS60140 TPS60141 graph_12_slvs273.gif
Figure 16. Load Transient Response
TPS60140 TPS60141 graph_14_slvs273.gif
Figure 18. Output Voltage vs Time (Start-Up Timing)