ZHCSE75D September 2015 – June 2018 LMZ36002
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Adjusting the Output Voltage
- 7.3.2 Switching Frequency (RT)
- 7.3.3 Recommended Operating Range
- 7.3.4 Synchronization (CLK)
- 7.3.5 Output Capacitor Selection
- 7.3.6 VERSA-COMP Pin Configurations
- 7.3.7 Input Capacitor Selection
- 7.3.8 Output On/Off Inhibit (INH/UVLO)
- 7.3.9 Under Voltage Lockout (UVLO)
- 7.3.10 Remote Sense
- 7.3.11 VBSEL
- 7.3.12 Soft-Start (SS/TR)
- 7.3.13 Power Good (PWRGD) and Pull-up (PWRGD_PU)
- 7.3.14 Overcurrent Protection
- 7.3.15 Thermal Shutdown
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- RVQ|43
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
7.3.2 Switching Frequency (RT)
The switching frequency range of the LMZ36002 is 200 kHz to 1 MHz. Not all PVIN, VOUT, and IOUT conditions can be set to all of the frequencies in this range. See Recommended Operating Range for the allowable operating ranges. The switching frequency can easily be set one of three ways. First, leaving the RT pin (pin 9) and RTSEL pin (pin 10) floating (OPEN) allows operation at the default switching frequency of 500 kHz. Also, connecting the RTSEL pin to AGND while floating the RT pin, sets the switching frequency to 1 MHz. The option is also available to set the switching frequency to any frequency in the range of 200 kHz to 1 MHz, by connecting a resistor (RRT) between the RT pin and AGND, while floating the RTSEL pin. See Table 3 below for standard resistor values for setting the switching frequency or use Equation 2 to calculate RRT for additional switching frequencies.
Table 3. Switching Frequency RRT Values
| Switching Frequency | RRT (kΩ) |
|---|---|
| 250 kHz | 158 |
| 500 kHz | 78.7 or (RT pin OPEN, RTSEL pin OPEN) |
| 750 kHz | 53.6 |
| 1 MHz | 38.3 or (RT pin OPEN, RTSEL pin to AGND) |
