JAJS355G April   2009  – August 2016 TPS62230

PRODUCTION DATA.  

  1. 特長
  2. アプリケーション
  3. 概要
  4. 改訂履歴
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Undervoltage Lockout
      2. 8.3.2 Enable and Shutdown
      3. 8.3.3 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Soft-Start
      2. 8.4.2 Power-Save Mode
      3. 8.4.3 Forced PWM Mode
      4. 8.4.4 100% Duty Cycle Low Dropout Operation
      5. 8.4.5 Short Circuit Protection
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Output Filter Design (Inductor and Output Capacitor)
        2. 9.2.2.2 Inductor Selection
        3. 9.2.2.3 Output Capacitor Selection
        4. 9.2.2.4 Input Capacitor Selection
        5. 9.2.2.5 Checking Loop Stability
      3. 9.2.3 Application Curves
        1. 9.2.3.1  VOUT = 1.1 V - TPS622311
        2. 9.2.3.2  VOUT = 1.2 V - TPS62232/TPS62235
        3. 9.2.3.3  VOUT = 1.8 V - TPS62231
        4. 9.2.3.4  VOUT = 1.85 V - TPS62236
        5. 9.2.3.5  VOUT = 2.5 V - TPS62230
        6. 9.2.3.6  VOUT = 3.0 V - TPS62233
        7. 9.2.3.7  Start-Up
        8. 9.2.3.8  PFM / PWM Operation
        9. 9.2.3.9  Peak-to-Peak Output Ripple Voltage
        10. 9.2.3.10 Power-Supply Rejection
        11. 9.2.3.11 Spurious Output Noise
        12. 9.2.3.12 Line Transient Response
        13. 9.2.3.13 Mode Transition
        14. 9.2.3.14 AC-Load Regulation
        15. 9.2.3.15 Load Transient Response
    3. 9.3 System Examples
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 デバイス・サポート
      1. 12.1.1 デベロッパー・ネットワークの製品に関する免責事項
    2. 12.2 関連リンク
    3. 12.3 ドキュメントの更新通知を受け取る方法
    4. 12.4 コミュニティ・リソース
    5. 12.5 商標
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 Glossary
  13. 13メカニカル、パッケージ、および注文情報

9 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.

9.1 Application Information

The TPS6223x device family are high-frequency, synchronous, step-down DC-DC converters providing switch frequencies up to 3.8 MHz. Different fixed output voltage versions are available from 1.0 V to 3.3 V.

9.2 Typical Application

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 ai_typ1_lvs941.gif Figure 5. TPS62230 2.5-V Output

9.2.1 Design Requirements

The device operates over an input voltage range from 2.05 V to 6 V. The device family offers a broad range of internally fixed output voltage options from 1 V to 3.3 V. The TPS6223x is easy to use and needs just three external components; however, the selection of external components and PCB layout must comply with the design guidelines to achieve specified performance.

9.2.2 Detailed Design Procedure

9.2.2.1 Output Filter Design (Inductor and Output Capacitor)

The TPS6223x is optimized to operate with effective inductance values in the range of 0.7 μH to 4.3 μH and with effective output capacitance in the range of 2.0 μF to 15 μF. The internal compensation is optimized to operate with an output filter of L = 1.0 μH/2.2 μH and COUT = 4.7 μF. Larger or smaller inductor/capacitor values can be used to optimize the performance of the device for specific operation conditions. For more details, see the Checking Loop Stability section.

9.2.2.2 Inductor Selection

The inductor value affects its peak-to-peak ripple current, the PWM-to-PFM transition point, the output voltage ripple and the efficiency. The selected inductor has to be rated for its DC resistance and saturation current. The inductor ripple current (ΔIL) decreases with higher inductance and increases with higher VIN or VOUT . Equation 5 calculates the maximum inductor current under static load conditions. The saturation current of the inductor must be rated higher than the maximum inductor current as calculated with Equation 6. This is recommended because during heavy load transient the inductor current will rise above the calculated value.

Equation 5. TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 eq4_dil_lvs941.gif
Equation 6. TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 eq5_ilmax_lvs941.gif

where

  • f = Switching frequency
  • L = Inductor value
  • ΔIL= Peak-to-peak inductor ripple current
  • ILmax = Maximum inductor current

In high-frequency converter applications, the efficiency is essentially affected by the inductor AC resistance (that is, quality factor) and to a smaller extent by the inductor DCR value. To achieve high-efficiency operation, take care in selecting inductors featuring a quality factor above 25 at the switching frequency. Increasing the inductor value produces lower RMS currents, but degrades transient response. For a given physical inductor size, increased inductance usually results in an inductor with lower saturation current.

The total losses of the coil consist of both the losses in the DC resistance, R(DC), and the following frequency-dependent components:

  • The losses in the core material (magnetic hysteresis loss, especially at high switching frequencies)
  • Additional losses in the conductor from the skin effect (current displacement at high frequencies)
  • Magnetic field losses of the neighboring windings (proximity effect)
  • Radiation losses

The following inductor series from different suppliers have been used with the TPS6223x converters.

Table 1. List of Inductors

INDUCTANCE
(μH)
DIMENSIONS
(mm3)
INDUCTOR TYPE SUPPLIER(1)
1.0 / 2.2 2.5 × 2.0 × 1.2 LQM2HPN1R0MJ0 Murata
2.2 2.0 × 1.2 × 0.55 LQM21PN2R2 Murata
1.0 / 2.2 2.0 × 1.2 × 1.0 MIPSZ2012 FDK
1.0 / 2.2 2.0 × 2.5 × 1.2 MIPSA2520 FDK
1.0 / 2.2 2.0 × 1.2 × 1.0 KSLI2012 series Hitachi Metal

9.2.2.3 Output Capacitor Selection

The unique hysteretic PWM control scheme of the TPS62230 allows the use of tiny ceramic capacitors. Ceramic capacitors with low ESR values have the lowest output voltage ripple and are recommended. The output capacitor requires either an X7R or X5R dielectric. Y5V and Z5U dielectric capacitors, aside from their wide variation in capacitance over temperature, become resistive at high frequencies.

At light load currents, the converter operate in power save mode and the output voltage ripple is dependent on the output capacitor value and the PFM peak inductor current. Higher output capacitor values minimize the voltage ripple in PFM mode and tighten DC output accuracy in PFM mode.

9.2.2.4 Input Capacitor Selection

Because of the nature of the buck converter having a pulsating input current, a low-ESR input capacitor is required for best input voltage filtering and minimizing the interference with other circuits caused by high input voltage spikes. For most applications a 2.2-μF to 4.7-μF ceramic capacitor is recommended. The input capacitor can be increased without any limit for better input voltage filtering. Because ceramic capacitor loses up to 80% of its initial capacitance at 5 V, TI recommends using 4.7 μF input capacitors for input voltages > 4.5 V.

Take care when using only small ceramic input capacitors. When a ceramic capacitor is used at the input and the power is being supplied through long wires, such as from a wall adapter, a load step at the output or VIN step on the input can induce ringing at the VIN pin. This ringing can couple to the output and be mistaken as loop instability or could even damage the part by exceeding the maximum ratings.

Table 2 shows a list of tested input and output capacitors.

Table 2. List of Capacitors

CAPACITANCE [μF] SIZE CAPACITOR TYPE SUPPLIER(1)
2.2 0402 GRM155R60J225 Murata
4.7 0402 AMK105BJ475MV Taiyo Yuden
4.7 0402 GRM155R60J475 Murata
4.7 0402 CL05A475MQ5NRNC Samsung
4.7 0603 GRM188R60J475 Murata

9.2.2.5 Checking Loop Stability

The first step of circuit and stability evaluation is to look from a steady-state perspective at the following signals:

  • Switching node, SW
  • Inductor current, IL
  • Output ripple voltage, VOUT(AC)

These are the basic signals that need to be measured when evaluating a switching converter. When the switching waveform shows large duty cycle jitter or the output voltage or inductor current shows oscillations, the regulation loop may be unstable. This is often a result of board layout and/or L-C combination.

As a next step in the evaluation of the regulation loop, the load transient response is tested. The time between the application of the load transient and the turn on of the P-channel MOSFET, the output capacitor must supply all of the current required by the load. VOUT immediately shifts by an amount equal to ΔI(LOAD) x ESR, where ESR is the effective series resistance of COUT. ΔI(LOAD) begins to charge or discharge CO generating a feedback error signal used by the regulator to return VOUT to its steady-state value. The results are most easily interpreted when the device operates in PWM mode.

During this recovery time, VOUT can be monitored for settling time, overshoot or ringing that helps judge the converter’s stability. Without any ringing, the loop has usually more than 45° of phase margin.

Because the damping factor of the circuitry is directly related to several resistive parameters (for example, MOSFET rDS(on)) that are temperature dependant, the loop stability analysis has to be done over the input voltage range, load current range, and temperature range.

9.2.3 Application Curves

9.2.3.1 VOUT = 1.1 V – TPS622311

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_compeff5_lvs941.gif Figure 6. Efficiency vs IOUT, PFM Mode – TPS622311
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr10_lvs941.gif Figure 7. Switching Frequency vs Output Current, 1.1-V Output Voltage, PFM Mode – TPS622311

9.2.3.2 VOUT = 1.2 V – TPS62232/TPS62235

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_eff5_lvs941.gif Figure 8. Efficiency PFM / PWM Mode, 1.2-V Output Voltage – TPS62232
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_compeff3_lvs941.gif Figure 10. Efficiency vs IOUT, PFM / PWM Mode – TPS62235
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_outv6_lvs941.gif Figure 12. 1.2-V Output Voltage Accuracy PFM/PWM Mode – TPS62232
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr7_lvs941.gif Figure 14. Switching Frequency vs Output Current, 1.2-V Output Voltage, Forced PWM Mode – TPS62232
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_eff6_lvs941.gif Figure 9. Efficiency Forced PWM Mode, 1.2-V Output Voltage – TPS62232
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_outv5_lvs941.gif Figure 11. 1.2-V Output Voltage Accuracy Forced PWM Mode – TPS62232
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr6_lvs941.gif Figure 13. Switching Frequency vs Output Current, 1.2-V Output Voltage, PFM/PWM Mode – TPS62232
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr8_lvs941.gif Figure 15. Switching Frequency vs Output Current, 1.2-V Output Voltage, PFM/PWM Mode – TPS62235

9.2.3.3 VOUT = 1.8 V – TPS62231

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_eff3_lvs941.gif Figure 16. Efficiency PFM/PWM Mode, 1.8-V Output Voltage – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_compeff_lvs941.gif Figure 18. Comparison Efficiency vs Inductor Value and Size – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_outv4_lvs941.gif Figure 20. 1.8-V Output Voltage Accuracy Forced PWM Mode – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr2_lvs941.gif Figure 22. Switching Frequency vs Output Current, 1.8-V Output Voltage, PFM/PWM Mode – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_eff4_lvs941.gif Figure 17. Efficiency Forced PWM Mode, 1.8-V Output Voltage – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_outv3_lvs941.gif Figure 19. 1.8-V Output Voltage Accuracy PFM / PWM Mode – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr1_lvs941.gif Figure 21. Switching Frequency vs Output Current, 1.8-V Output Voltage, PFM/PWM Mode – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr3_lvs941.gif Figure 23. Switching Frequency vs Output Current, 1.8-V Output Voltage, Forced PWM Mode – TPS62231

9.2.3.4 VOUT = 1.85 V – TPS62236

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_compeff4_lvs941.gif Figure 24. Efficiency vs IOUT, PFM/PWM Mode – TPS62236
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr9_lvs941.gif Figure 25. Switching Frequency vs Output Current, 1.85-V Output Voltage, PFM/PWM Mode – TPS62236

9.2.3.5 VOUT = 2.5 V – TPS62230

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_eff1_lvs941.gif Figure 26. Efficiency PFM/PWM Mode, 2.5-V Output Voltage – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_outv1_lvs941.gif Figure 28. 2.5V Output Voltage Accuracy Forced PWM Mode – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr4_lvs941.gif Figure 30. Switching Frequency vs Output Current, 2.5-V Output Voltage, PFM/PWM Mode – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_eff2_lvs941.gif Figure 27. Efficiency Forced PWM Mode, 2.5-V Output Voltage – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_outv2_lvs941.gif Figure 29. 2.5-V Output Voltage Accuracy PFM/PWM Mode – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_sw_fr5_lvs941.gif Figure 31. Switching Frequency vs Output Current, 2.5-V Output Voltage, Forced PWM Mode – TPS62230

9.2.3.6 VOUT = 3.0 V – TPS62233

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_compeff2_lvs941.gif Figure 32. Efficiency vs IOUT – TPS62233

9.2.3.7 Start-Up

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_stup1v_lvs941.gif Figure 33. Start-Up in 1-V Prebiased Output – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_stup_lvs941.gif Figure 34. Start-Up into 20 Ω Load, VOUT 2.5 V – TPS62230

9.2.3.8 PFM / PWM Operation

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_pfm1_lvs941.gif Figure 35. PFM Mode Operation, L = 1.0 µH,
IOUT = 10 mA – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_pwm1_lvs941.gif Figure 37. Forced PWM Mode Operation IOUT = 10 mA – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_pfm2_lvs941.gif Figure 36. PFM Mode Operation, L = 2.2 µH,
IOUT = 10 mA – TPS62230

9.2.3.9 Peak-to-Peak Output Ripple Voltage

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_vo18v_231_lvs941.gif Figure 38. Output Voltage, Peak-to-Peak vs Output Current – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_vo25v_230_lvs941.gif Figure 39. Output Voltage, Peak-to-Peak vs Output Current – TPS62230

9.2.3.10 Power-Supply Rejection

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_pssr1_lvs941.gif Figure 40. 1.8-V Power-Supply Rejection Ratio – TPS62231

9.2.3.11 Spurious Output Noise

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_spur_12R_load.gif Figure 41. Spurious Output Noise, 12R Load – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_spur_100R_load.gif Figure 42. Spurious Output Noise, 100R Load – TPS62231

9.2.3.12 Line Transient Response

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_litran_lvs941.gif Figure 43. Line Transient Response, PFM Mode – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_litran2_lvs941.gif Figure 44. Line Transient Response, PWM Mode – TPS62231

9.2.3.13 Mode Transition

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_mtran_lvs941.gif Figure 45. Mode Transition PFM / Forced PWM Mode – TPS62231

9.2.3.14 AC-Load Regulation

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_acl3_lvs941.gif Figure 46. AC – Load Regulation Performance 1.8-V VOUT, PFM Mode – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_acl2_lvs941.gif Figure 48. AC – Load Regulation Performance 2.5-V VOUT, PWM Mode – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_acl1_lvs941.gif Figure 47. AC – Load Regulation Performance 2.5-V VOUT, PFM Mode – TPS62230

9.2.3.15 Load Transient Response

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_lotr3_lvs941.gif Figure 49. Load Transient Response 5 mA to 150 mA, PFM to PWM Mode, VOUT 1.8 V – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_lotr1_lvs941.gif Figure 51. Load Transient Response 5 mA to 200 mA, PFM to PWM Mode, VOUT 2.5 V – TPS62230
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_lotr4_lvs941.gif Figure 50. Load Transient Response 5 mA to 150 mA, Forced PWM Mode, VOUT 1.8 V – TPS62231
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 tc_lotr2_lvs941.gif Figure 52. Load Transient Response 5 mA to 200 mA, Forced PWM Mode, VOUT 2.5 V – TPS62230

9.3 System Examples

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 ai_typ2_lvs941.gif Figure 53. TPS62231 1.8-V Output
TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 ai_typ3_lvs941.gif Figure 54. TPS62232 1.2-V Output