ZHCSJU1E May 2008 – May 2019 TPS61087
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
- 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)
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
8.2.2.4 Compensation (COMP)
The regulator loop can be compensated by adjusting the external components connected to the COMP pin. The COMP pin is the output of the internal transconductance error amplifier.
Standard values of RCOMP = 16 kΩ and CCOMP = 2.7 nF will work for the majority of the applications.
See Table 5 for dedicated compensation networks giving an improved load transient response. The following equations can be used to calculate RCOMP and CCOMP:
with
| VIN | Minimum input voltage |
| VS | Output voltage |
| Cout | Output capacitance |
| L | Inductor value, for example, 3.3 μH or 6.8 μH |
| Iout | Maximum output current in the application |
Make sure that RCOMP < 120 kΩ and CCOMP> 820 pF, independent of the results of the above formulas.
Table 5. Recommended Compensation Network Values at High/Low Frequency
| FREQUENCY | L | VS | VIN ± 20% | RCOMP | CCOMP |
|---|---|---|---|---|---|
| High (1.2 MHz) | 3.3 μH | 15 V | 5 V | 100 kΩ | 820 pF |
| 3.3 V | 91 kΩ | 1.2 nF | |||
| 12 V | 5 V | 68 kΩ | 820 pF | ||
| 3.3 V | 68 kΩ | 1.2 nF | |||
| 9 V | 5 V | 39 kΩ | 820 pF | ||
| 3.3 V | 39 kΩ | 1.2 nF | |||
| Low (650 kHz) | 6.8 μH | 15 V | 5 V | 51 kΩ | 1.5 nF |
| 3.3 V | 47 kΩ | 2.7 nF | |||
| 12 V | 5 V | 33 kΩ | 1.5 nF | ||
| 3.3 V | 33 kΩ | 2.7 nF | |||
| 9 V | 5 V | 18 kΩ | 1.5 nF | ||
| 3.3 V | 18 kΩ | 2.7 nF |
Table 5 gives conservative RCOMP and CCOMP values for certain inductors, input and output voltages providing a very stable system. For a faster response time, a higher RCOMP value can be used to enlarge the bandwidth, as well as a slightly lower value of CCOMP to keep enough phase margin. These adjustments should be performed in parallel with the load transient response monitoring of TPS61087.