ZHCSHL8D December   2017  – August 2020 LMZM33602

PRODUCTION DATA  

  1. 1特性
  2. 2应用
  3. 3说明
  4. 4Revision History
  5. 5Pin Configuration and Functions
    1.     Pin Functions
  6. 6Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics (VIN = 5 V)
    8. 6.8 Typical Characteristics (VIN = 12 V)
    9. 6.9 Typical Characteristics (VIN = 24 V)
  7. 7Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Adjusting the Output Voltage
      2. 7.3.2  Feedforward Capacitor, CFF
      3. 7.3.3  Voltage Dropout
      4. 7.3.4  Switching Frequency (RT)
      5. 7.3.5  Synchronization (SYNC)
      6. 7.3.6  Input Capacitors
      7. 7.3.7  Output Capacitors
      8. 7.3.8  Output On/Off Enable (EN)
      9. 7.3.9  Programmable Undervoltage Lockout (UVLO)
      10. 7.3.10 Power Good (PGOOD)
      11. 7.3.11 Overcurrent Protection (OCP)
      12. 7.3.12 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active Mode
      2. 7.4.2 Shutdown Mode
  8. 8Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Output Voltage Setpoint
        3. 8.2.2.3 Feedforward Capacitor (CFF)
        4. 8.2.2.4 Setting the Switching Frequency
        5. 8.2.2.5 Input Capacitors
        6. 8.2.2.6 Output Capacitor Selection
        7. 8.2.2.7 Application Curves
  9. 9Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
        1. 9.1.1.1 Custom Design With WEBENCH® Tools
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary

封装选项

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订购信息

Switching Frequency (RT)

The switching frequency range of the LMZM33602 is 200 kHz to 1.2 MHz. The switching frequency can easily be set by connecting a resistor (RRT) between the RT pin and AGND. Additionally, the RT pin can be left floating and the LMZM33602 will operate at 400 kHz default switching frequency. Use Equation 3 to calculate the RRT value for a desired frequency or simply select from Table 7-3.

The switching frequency must be selected based on the output voltage setting of the device and the operating input voltage. See Table 7-3 for RRT resistor values and the allowable output voltage range for a given switching frequency for three common input voltages.

Equation 3. GUID-EF7C6B22-2CCE-4B68-85DF-157BD3C65724-low.gif
Table 7-3 Switching Frequency vs Output Voltage
SWITCHING FREQUENCY (kHz)RRT RESISTOR (kΩ)VIN = 5 V (±5%)VIN = 12 V (±5%)VIN = 24 V (±5%)
VOUT RANGE (V)VOUT RANGE (V)VOUT RANGE (V)
MINMAXMINMAXMINMAX
20020013.415.516.2
25015813.516.2110.6
30013313.516.8110.6
35011313.517.4110.7
400100 or
(RT pin open)
13.517.9111.4
45088.713.518.41.212.1
50078.713.518.91.312.8
55071.513.419.31.413.4
60066.513.419.51.614.1
65060.413.419.41.714.6
70056.213.319.31.815.2
75052.313.319.22.015.8
80049.913.319.12.116.3
85046.413.21.19.02.216.8
90044.213.21.29.02.317.3
95041.213.21.28.92.517.8
100039.213.11.38.82.618
105037.413.11.48.72.718
110035.713.11.48.62.918
115034.0131.58.5318
120033.2131.68.53.118