ZHCSXJ3A December 2024 – August 2025 LM51770 , LM517701
PRODUCTION DATA
- 1
- 1 特性
- 2 應(yīng)用
- 3 說(shuō)明
- 4 器件比較
- 5 引腳配置和功能
- 6 規(guī)格
- 7 參數(shù)測(cè)量信息
-
8 詳細(xì)說(shuō)明
- 8.1 概述
- 8.2 功能方框圖
- 8.3
特性說(shuō)明
- 8.3.1 上電復(fù)位（POR 系統(tǒng)）
- 8.3.2 降壓/升壓控制方案
- 8.3.3 節(jié)能模式
- 8.3.4 電源電壓選擇 – VMAX 開(kāi)關(guān)
- 8.3.5 使能和欠壓鎖定
- 8.3.6 振蕩器頻率選擇
- 8.3.7 頻率同步
- 8.3.8 電壓調(diào)節(jié)環(huán)路
- 8.3.9 輸出電壓跟蹤
- 8.3.10 斜率補(bǔ)償
- 8.3.11 可配置軟啟動(dòng)
- 8.3.12 峰值電流傳感器
- 8.3.13 電流監(jiān)控和電流限制控制環(huán)路
- 8.3.14 短路 - 斷續(xù)保護(hù)
- 8.3.15 nFLT 引腳和保護(hù)
- 8.3.16 器件配置引腳
- 8.3.17 雙隨機(jī)展頻 - DRSS
- 8.3.18 柵極驅(qū)動(dòng)器
- 8.4 器件功能模式
- 9 應(yīng)用和實(shí)施
- 10器件和文檔支持
- 11修訂歷史記錄
- 12機(jī)械、封裝和可訂購(gòu)信息
封裝選項(xiàng)
請(qǐng)參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- DCP|38
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購(gòu)信息
6.7 Typical Characteristics
The following conditions apply (unless otherwise noted): TJ = 25°C; V(VCC) = 5V
Figure 6-1 Switching Frequency vs RT
Resistance
Figure 6-3 VIN LDO - VCC Voltage vs VCC Load
Current
Figure 6-5 BIAS LDO - VCC Voltage vs VCC Load
Current
Figure 6-7 FB Pin Reference Voltage vs
Temperature
Figure 6-9 LM517701 Current
Limit Threshold Voltage vs Temperature
Figure 6-11 CSB Input Current vs Temperature 
Figure 6-13 Minimum Controllable
Off-time vs Switching Frequency
Figure 6-15 Shutdown Current into VIN
vs Pin Voltage VEN/UVLO = 0V ,V(VIN) = 12V, V(BIAS) = 0V
Figure 6-17 Shutdown Current into BIAS vs Pin Voltage VEN/UVLO = 0V ,V(BIAS) = 12V, V(VIN) = 3.5V
Figure 6-19 Standby Current into VIN vs Temperature VEN/UVLO = 0.8V, V(VIN) = 12V, V(BIAS) = 0V
Figure 6-21 Quiescent Current into BIAS vs Temperature VEN/UVLO = 3.3V, V(BIAS) = 12V, V(VIN) = 3.5V
Figure 6-23 Hysteresis Current on EN/UVLO vs Temperature 
Figure 6-2 Switching Frequency vs Temperature
R(RT) = 75kΩ
Figure 6-4 VIN LDO - VCC Voltage vs VIN Voltage I(VCC) = 20mA
Figure 6-6 BIAS LDO - VCC Voltage vs BIAS Voltage I(VCC) = 50mA
Figure 6-8 LM51770
Current Limit Threshold Voltage vs Temperature
Figure 6-10 CSA Input Current vs Temperature 
Figure 6-12 Minimum Controllable
On-time vs Switching Frequency
Figure 6-14 UVLO Threshold Voltage vs Temperature 
Figure 6-16 Shutdown Current into VIN vs TemperatureVEN/UVLO = 0V ,V(VIN) = 12V, V(BIAS) = 0V
Figure 6-18 Shutdown Current into BIAS vs Temperature VEN/UVLO = 0V ,V(BIAS) = 12V, V(VIN) = 3.5V
Figure 6-20 Quiescent Current into BIAS vs Pin Voltage VEN/UVLO = 3.3V, V(BIAS) = 12V, V(VIN) = 3.5V
Figure 6-22 Soft-Start current vs Temperature