ZHCSO49C May   2021  – March 2023 TPS629210-Q1

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  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 Thermal Information - DYC Package
    6. 7.6 Electrical Characteristics
    7. 7.7 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Mode Selection and Device Configuration (MODE/S-CONF Pin)
      2. 8.3.2 Adjustable VO Operation (External Voltage Divider)
      3. 8.3.3 Selectable VO Operation (VSET and Internal Voltage Divider)
      4. 8.3.4 Smart Enable with Precise Threshold
      5. 8.3.5 Power Good (PG)
      6. 8.3.6 Output Discharge Function
      7. 8.3.7 Undervoltage Lockout (UVLO)
      8. 8.3.8 Current Limit and Short Circuit Protection
      9. 8.3.9 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Forced Pulse Width Modulation (PWM) Operation
      2. 8.4.2 Power Save Mode Operation (Auto PFM/PWM)
      3. 8.4.3 AEE (Automatic Efficiency Enhancement)
      4. 8.4.4 100% Duty-Cycle Operation
      5. 8.4.5 Starting into a Prebiased Load
  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 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Programming the Output Voltage
        3. 9.2.2.3 External Component Selection
          1. 9.2.2.3.1 Output Filter and Loop Stability
          2. 9.2.2.3.2 Inductor Selection
          3. 9.2.2.3.3 Capacitor Selection
            1. 9.2.2.3.3.1 Output Capacitor
            2. 9.2.2.3.3.2 Input Capacitor
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Powering Multiple Loads
      2. 9.3.2 Inverting Buck-Boost (IBB)
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
      3. 9.5.3 Thermal Considerations
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 第三方米6体育平台手机版_好二三四免责声明
      2. 10.1.2 Development Support
        1. 10.1.2.1 Custom Design With WEBENCH® Tools
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 接收文档更新通知
    4. 10.4 支持资源
    5. 10.5 Trademarks
    6. 10.6 静电放电警告
    7. 10.7 术语表
  11. 11Mechanical, Packaging, and Orderable Information

Application Curves

GUID-20211108-SS0I-GM5L-JGG8-QC9DKXRPGX4J-low.svg
VOUT = 5.0 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-2 Efficiency vs Output Current
GUID-20211108-SS0I-H12F-KTDJ-FH4LP5RK2VDD-low.svg
VOUT = 5.0 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-4 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-QWRN-JRLF-RHHF8PPLNHQV-low.svg
VOUT = 5.0 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-6 Output Voltage vs Output Current
GUID-20211108-SS0I-GFBC-XCRT-R5M00SDND8KW-low.svg
VOUT = 5.0 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-8 Efficiency vs Output Current
GUID-20211108-SS0I-MV9N-RCLT-CT2K9XR7VNXQ-low.svg
VOUT = 5.0 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-10 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-CDSZ-CSCT-9ZF5RDZK03NM-low.svg
VOUT = 5.0 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-12 Output Voltage vs Output Current
GUID-20211108-SS0I-LQWD-L8PP-VNMQ0K9VNTVL-low.svg
VOUT = 3.3 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-14 Efficiency vs Output Current
GUID-20211108-SS0I-QGXJ-BNWH-6M8TPRCZRFLX-low.svg
VOUT = 3.3 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-16 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-ZZWK-RX3F-TDZHC4TZ3L3N-low.svg
VOUT = 3.3 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-18 Output Voltage vs Output Current
GUID-20211108-SS0I-Q6ZC-RXPT-RW3DPWXCPL20-low.svg
VOUT = 3.3 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-20 Efficiency vs Output Current
GUID-20211108-SS0I-FKC1-4LMK-QJW1CWZS7PL6-low.svg
VOUT = 3.3 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-22 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-B9ZK-9P8R-4BSMGHQQQXDT-low.svg
VOUT = 3.3 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-24 Output Voltage vs Output Current
GUID-20211108-SS0I-QR6W-CQXB-ZP3RRB54G03H-low.svg
VOUT = 1.8 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-26 Efficiency vs Output Current
GUID-20211108-SS0I-PC4H-Q9ML-39C91VVZZVKQ-low.svg
VOUT = 1.8 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-28 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-ZBDW-7TXX-73RXSC2RD0WZ-low.svg
VOUT = 1.8 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-30 Output Voltage vs Output Current
GUID-20211108-SS0I-7SKM-RD06-TJTRBLNLDQDP-low.svg
VOUT = 1.8 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-32 Efficiency vs Output Current
GUID-20211108-SS0I-T6SD-8C3J-M8V4JBN5WX3W-low.svg
VOUT = 1.8 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-34 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-HW7S-NF4J-BPQVJWGXJJLB-low.svg
VOUT = 1.8 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-36 Output Voltage vs Output Current
GUID-20211108-SS0I-N9MC-N3FD-XGG2RQ9P0ZS3-low.svg
VOUT = 1.2 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-38 Efficiency vs Output Current
GUID-20211108-SS0I-PPCR-V2CG-6WM00MBJLGDW-low.svg
VOUT = 1.2 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-40 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-F6D7-S09J-MZR4XQ6GLDTD-low.svg
VOUT = 1.2 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-42 Output Voltage vs Output Current
GUID-20211108-SS0I-6PLP-RLKW-9QRF1PLML1GB-low.svg
VOUT = 1.2 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-44 Efficiency vs Output Current
GUID-20211108-SS0I-8TLF-V9MF-0QRV73NT8Q8C-low.svg
VOUT = 1.2 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-46 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-89D1-BRB2-M0RHHK57TH6M-low.svg
VOUT = 1.2 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-48 Output Voltage vs Output Current
GUID-20211108-SS0I-VXGC-6P0B-GQBN4FTKD92N-low.svg
VOUT = 0.6 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-50 Efficiency vs Output Current
GUID-20211108-SS0I-HZDS-KRP6-H9CQC3Q5LCHL-low.svg
VOUT = 0.6 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-52 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-KHXZ-2LVX-ZZFKBNKFKMC5-low.svg
VOUT = 0.6 V L = 2.2 μH Fsw = 2.5 MHz
Auto PFM/PWM
Figure 9-54 Output Voltage vs Output Current
GUID-20211108-SS0I-RKFM-JTTM-67S8P6MNNX4X-low.svg
VOUT = 0.6 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-56 Efficiency vs Output Current
GUID-20211108-SS0I-K1VJ-QWWL-XRMVBXVZTPWL-low.svg
VOUT = 0.6 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-58 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-26RB-GNJJ-SL0FRXMTR06F-low.svg
VOUT = 0.6 V L = 3.3 μH Fsw = 1.0 MHz
Auto PFM/PWM
Figure 9-60 Output Voltage vs Output Current
GUID-20211115-SS0I-S7DQ-0WG2-WPZZ0N5TGMN8-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 0 A Auto PFM/PWM
Figure 9-62 Start-Up Timing
GUID-20211115-SS0I-LQGD-RQN1-PLXZDNVPKTXW-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 0 A Forced PWM
Figure 9-64 Start-Up into Prebiased Output
GUID-20211115-SS0I-HJXG-GZSZ-V48XFJW8Z4PS-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 1 A Forced PWM
Figure 9-66 Shutdown Timing with Output Discharge Disabled
GUID-20211115-SS0I-2H8B-K7V8-9FXH2580XWKP-low.svg
VIN = 12 V L = 3.3 μH Fsw = 1.0 MHz
VOUT = 3.3 V IO = 10 mA Auto PFM/PWM
Figure 9-68 Shutdown Timing with Output Discharge Disabled
GUID-20211115-SS0I-06QV-TNBD-LPSCZ2VGDDD0-low.svg
VIN = 12 V L = 3.3 μH Fsw = 1.0 MHz
VOUT = 3.3 V IO = 10 mA Forced PWM
Figure 9-70 Shutdown Timing with Output Discharge Disabled
GUID-20211115-SS0I-VWCF-VTRB-Q0JLQG1MRZQ4-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 0.5 A to 1 A Auto PFM/PWM
Figure 9-72 Load Transient Response
GUID-20211115-SS0I-NZBM-NKL8-L81V2KDK3RFS-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 0 A Forced PWM
Figure 9-74 Output Voltage Ripple
GUID-20211115-SS0I-LTNJ-ZB5K-FSVJ70X1Q6RP-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 1 A Forced PWM
Figure 9-76 Output Voltage Ripple
GUID-20211115-SS0I-7D2L-SR7F-RHLWNFK8VTPQ-low.svg
VIN = 12 V L = 3.3 μH Fsw = 1.0 MHz
VOUT = 3.3 V IO = 1 A Forced PWM
Figure 9-78 Output Voltage Ripple
GUID-20211115-SS0I-GHSZ-RGLS-XRRPKQQB8JWN-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 1 A Forced PWM
Figure 9-80 Input Voltage Ripple
GUID-20211110-SS0I-6XGT-Q6LR-JQS2479HVDCR-low.svg
VIN = 12 V L = 3.3 μH Fsw = 1.0 MHz
VOUT = 0.6 V IO = 1 A Forced PWM
Figure 9-82 Bode Plot
GUID-20211108-SS0I-DPMH-8BFK-TM0WGDGDFH8Q-low.svg
VOUT = 5.0 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-3 Efficiency vs Output Current
GUID-20211108-SS0I-NZXS-JLTD-SDWB48D873QC-low.svg
VOUT = 5.0 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-5 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-W8ST-KX3Z-M7H1PK5DGZV3-low.svg
VOUT = 5.0 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-7 Output Voltage vs Output Current
GUID-20211108-SS0I-N7ZH-0B3M-TFTBJD3CSJTQ-low.svg
VOUT = 5.0 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-9 Efficiency vs Output Current
GUID-20211108-SS0I-MPZJ-DRXF-QV2PTQBZNSHZ-low.svg
VOUT = 5.0 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-11 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-MPRS-PKKC-HHLC6T6QFQXT-low.svg
VOUT = 5.0 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-13 Output Voltage vs Output Current
GUID-20211108-SS0I-NZ15-WXPH-B2RHXHCZRXVT-low.svg
VOUT = 3.3 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-15 Efficiency vs Output Current
GUID-20211108-SS0I-JJ6G-ZPQN-XXKVB4JFQ3C0-low.svg
VOUT = 3.3 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-17 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-JJ2N-BF4D-7CQHWGSWXHXT-low.svg
VOUT = 3.3 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-19 Output Voltage vs Output Current
GUID-20211108-SS0I-2FG9-9GDX-MMJLFXG6MHXL-low.svg
VOUT = 3.3 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-21 Efficiency vs Output Current
GUID-20211108-SS0I-809V-H1KL-GC2KHQTNP5J5-low.svg
VOUT = 3.3 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-23 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-NC7Z-76HB-4VDQSXLXBGLG-low.svg
VOUT = 3.3 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-25 Output Voltage vs Output Current
GUID-20211108-SS0I-HKB0-8H1K-GFLJKGSQCMVW-low.svg
VOUT = 1.8 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-27 Efficiency vs Output Current
GUID-20211108-SS0I-VFVV-HBTJ-9TB27CF2LVBD-low.svg
VOUT = 1.8 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-29 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-0DVZ-LRVW-2CHFFJJ463RW-low.svg
VOUT = 1.8 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-31 Output Voltage vs Output Current
GUID-20211108-SS0I-FFMS-J6SR-5DFSPGM86CXG-low.svg
VOUT = 1.8 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-33 Efficiency vs Output Current
GUID-20211108-SS0I-L1NZ-HVJL-JPMPPB9MSHML-low.svg
VOUT = 1.8 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-35 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-2FHJ-WD07-PGLMC7VWZ0TL-low.svg
VOUT = 1.8 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-37 Output Voltage vs Output Current
GUID-20211108-SS0I-5RD1-J4DP-HD1FNX7XWBCQ-low.svg
VOUT = 1.2 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-39 Efficiency vs Output Current
GUID-20211108-SS0I-MMDM-82PV-VMRZSCKGJJ35-low.svg
VOUT = 1.2 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-41 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-TKZ9-FVF7-PKQ9JDR3MDR3-low.svg
VOUT = 1.2 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-43 Output Voltage vs Output Current
GUID-20211108-SS0I-MM8C-KKWW-VXWPLQS25FBX-low.svg
VOUT = 1.2 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-45 Efficiency vs Output Current
GUID-20211108-SS0I-XQZH-8STQ-8FJWN0WPN1GS-low.svg
VOUT = 1.2 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-47 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-64HP-J5BZ-5L9F98TH8SFD-low.svg
VOUT = 1.2 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-49 Output Voltage vs Output Current
GUID-20211108-SS0I-JQ8D-XRRD-RDZ55SWFSK2S-low.svg
VOUT = 0.6 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-51 Efficiency vs Output Current
GUID-20211108-SS0I-VVZS-MN3L-JZWSJLJVMCBW-low.svg
VOUT = 0.6 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-53 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-HH04-4J4N-8MP71HW2DBN0-low.svg
VOUT = 0.6 V L = 2.2 μH Fsw = 2.5 MHz
Forced PWM
Figure 9-55 Output Voltage vs Output Current
GUID-20211108-SS0I-S5GT-DL5P-TDGZPQTBJTZP-low.svg
VOUT = 0.6 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-57 Efficiency vs Output Current
GUID-20211108-SS0I-TPCK-QHXH-DRRZPVHRXJBZ-low.svg
VOUT = 0.6 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-59 Switching Frequency vs Input Voltage
GUID-20211108-SS0I-PKCC-2836-G39J9F5BRJJX-low.svg
VOUT = 0.6 V L = 3.3 μH Fsw = 1.0 MHz
Forced PWM
Figure 9-61 Output Voltage vs Output Current
GUID-20211115-SS0I-ZCGX-RL45-L8LPG3W8KQCQ-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 1 A Forced PWM
Figure 9-63 Start-Up Timing
GUID-20211115-SS0I-CTPM-FQXZ-CWM72WJ2N7JF-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 0 A Auto PFM/PWM
Figure 9-65 Shutdown Timing with Output Discharge Enabled
GUID-20211115-SS0I-PZQ9-D20S-NXRS1LWT1CNC-low.svg
VIN = 12 V L = 3.3 μH Fsw = 1.0 MHz
VOUT = 3.3 V IO = 10 mA Auto PFM/PWM
Figure 9-67 Shutdown Timing with Output Discharge Enabled
GUID-20211115-SS0I-SF08-LBHD-XXQG39TXCH3Q-low.svg
VIN = 12 V L = 3.3 μH Fsw = 1.0 MHz
VOUT = 3.3 V IO = 10 mA Forced PWM
Figure 9-69 Shutdown Timing with Output Discharge Enabled
GUID-20211115-SS0I-5JMN-QRMN-4QDBMFKW581P-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 0 A to 0.5 A Auto PFM/PWM
Figure 9-71 Load Transient Response
GUID-20211115-SS0I-11MX-LGBH-7ZGHXMTFGHFF-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 0 A Auto PFM/PWM
Figure 9-73 Output Voltage Ripple
GUID-20211115-SS0I-XMN3-1CQ6-PHPB86ZBZZ17-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 1 A Auto PFM/PWM
Figure 9-75 Output Voltage Ripple
GUID-20211115-SS0I-Z1VX-NMD7-V5QKTXZZ6TMT-low.svg
VIN = 12 V L = 3.3 μH Fsw = 1.0 MHz
VOUT = 3.3 V IO = 1 A Auto PFM/PWM
Figure 9-77 Output Voltage Ripple
GUID-20211115-SS0I-TVR0-QQ9N-JRWQXGBFF99P-low.svg
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 3.3 V IO = 1 A Auto PFM/PWM
Figure 9-79 Input Voltage Ripple
GUID-20211110-SS0I-PQXP-BJK0-NPKBQNWV3H49-low.svg
 
 
 
VIN = 12 V L = 2.2 μH Fsw = 2.5 MHz
VOUT = 0.6 V IO = 1 A Forced PWM
Figure 9-81 Bode Plot