ZHCSEU9C March 2016 – June 2018 LMZ34202
PRODUCTION DATA.
- 1 特性
- 2 應用
- 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
7.3.1 Adjusting the Output Voltage
The VADJ pin sets the output voltage of the LMZ34202. The output voltage adjustment range is from 2.5 V to 7.5 V. The switching frequency range for any output voltage must be determined from Table 4 or Table 5. The adjustment method requires the addition of RSET, which sets the output voltage, and the connection of SENSE+ to VOUT. The RSET resistor must be connected directly between the VADJ (pin 24) and AGND. The SENSE+ pin (pin 22) must be connected to VOUT either at the load for improved regulation or at VOUT of the device. Table 1 lists the standard external RSET resistor for a number of common bus voltages.
Table 1. Standard RSET Resistor Values for Common Output Voltages
| OUTPUT VOLTAGE VOUT (V) | |||||
|---|---|---|---|---|---|
| 2.5 | 3.3 | 5.0 | 6.0 | 7.5 | |
| RSET (kΩ) | 13.7 | 8.87 | 5.11 | 4.02 | 3.09 |
For other output voltages, the value of the required resistor can either be calculated using the following formula, or simply selected from the range of values given in Table 2.
Table 2. Standard RSET Resistor Values
| VOUT (V) | RSET (kΩ) | VOUT (V) | RSET (kΩ) | |
|---|---|---|---|---|
| 2.5 | 13.7 | 5.1 | 4.99 | |
| 2.6 | 12.7 | 5.2 | 4.87 | |
| 2.7 | 11.8 | 5.3 | 4.75 | |
| 2.8 | 11.3 | 5.4 | 4.64 | |
| 2.9 | 10.7 | 5.5 | 4.53 | |
| 3.0 | 10.2 | 5.6 | 4.42 | |
| 3.1 | 9.76 | 5.7 | 4.32 | |
| 3.2 | 9.31 | 5.8 | 4.22 | |
| 3.3 | 8.87 | 5.9 | 4.12 | |
| 3.4 | 8.45 | 6.0 | 4.02 | |
| 3.5 | 8.06 | 6.1 | 3.97 | |
| 3.6 | 7.87 | 6.2 | 3.92 | |
| 3.7 | 7.50 | 6.3 | 3.83 | |
| 3.8 | 7.32 | 6.4 | 3.74 | |
| 3.9 | 6.98 | 6.5 | 3.65 | |
| 4.0 | 6.81 | 6.6 | 3.61 | |
| 4.1 | 6.49 | 6.7 | 3.57 | |
| 4.2 | 6.34 | 6.8 | 3.48 | |
| 4.3 | 6.19 | 6.9 | 3.40 | |
| 4.4 | 5.90 | 7.0 | 3.36 | |
| 4.5 | 5.76 | 7.1 | 3.32 | |
| 4.6 | 5.62 | 7.2 | 3.24 | |
| 4.7 | 5.49 | 7.3 | 3.20 | |
| 4.8 | 5.36 | 7.4 | 3.16 | |
| 4.9 | 5.23 | 7.5 | 3.09 | |
| 5.0 | 5.11 |