ZHCSTT4H November 2007 – October 2024 LM3481
PRODUCTION DATA
| 參數 | 測試條件 | 最小值 | 典型值 | 最大值 | 單位 | |
|---|---|---|---|---|---|---|
| VFB | 反饋電壓 | VCOMP = 1.4V,2.97V ≤ VIN ≤ 48V | 1.275 | V | ||
| VCOMP = 1.4V,2.97V ≤ VIN ≤ 48V,–40°C ≤ TJ ≤ 125°C | 1.256 | 1.294 | ||||
| ΔVLINE | 反饋電壓線性調整率 | 2.97V ≤ VIN ≤ 48V | 0.003 | %/V | ||
| ΔVLOAD | 輸出電壓負載調整率 | IEAO 拉電流/灌電流 | ±0.5 | %/A | ||
| VUVLOSEN | 欠壓鎖定基準電壓 | VUVLO 逐漸下降 | 1.430 | V | ||
| VUVLO 逐漸下降,–40°C ≤ TJ ≤ 125°C | 1.345 | 1.517 | ||||
| IUVLO | UVLO 拉電流 | 啟用 | 5 | μA | ||
| 啟用,–40°C ≤ TJ ≤ 125°C | 3 | 6 | ||||
| VUVLOSD | UVLO 關斷電壓 | 0.55 | 0.7 | 0.82 | V | |
| ICOMP | COMP 引腳電流源 | VFB = 0V | 640 | μA | ||
| VCOMP | VFB = 1.275V | 1.4 | V | |||
| fnom | 標稱開關頻率 | RFA = 40k? | 475 | kHz | ||
| RFA = 40k?,–40°C ≤ TJ ≤ 125°C | 406 | 550 | ||||
| Vsync-HI | FA/SYNC/SD 引腳上的同步閾值 | 同步電壓上升 | 1.4 | V | ||
| Vsync-LOW | FA/SYNC/SD 引腳上的同步閾值 | 同步電壓下降 | 0.7 | V | ||
| RDS1 (ON) | 驅動器開關導通電阻(頂部) | IDR = 0.2A,VIN= 5V | 4 | Ω | ||
| RDS2 (ON) | 驅動器開關導通電阻(底部) | IDR = 0.2A | 2 | Ω | ||
| VDR (max) | 最大驅動電壓擺幅(1) | VIN < 6V | VIN | V | ||
| VIN ≥ 6V | 6 | |||||
| Dmax | 最大占空比 | RFA = 40k? | 81 | 85 | % | |
| tmin (on) | 最短導通時間 | 250 | 363 | ns | ||
| 整個溫度范圍內的最壞情況 | 571 | ns | ||||
| ISUPPLY | 電源電流(開關) | 請參閱(2) | 3.7 | mA | ||
| 請參閱(2),–40°C ≤ TJ ≤ 125°C | 5.0 | |||||
| IQ | 關斷模式下的靜態電流 | VFA/SYNC/SD = 3V(3),VIN = 12V | 9 | μA | ||
| VFA/SYNC/SD = 3V(3),VIN = 12V,–40°C ≤ TJ ≤ 125°C | 15 | |||||
| VFA/SYNC/SD = 3V(3),VIN = 5V | 5 | |||||
| VFA/SYNC/SD = 3V(3),VIN = 5V,–40°C ≤ TJ ≤ 125°C | 10 | |||||
| VSENSE | 電流檢測閾值電壓 | 160 | mV | |||
| –40°C ≤ TJ ≤ 125°C | 100 | 190 | ||||
| VSC | 短路電流限制檢測電壓 | 220 | mV | |||
| –40°C ≤ TJ ≤ 125°C | 157 | 275 | ||||
| VSL | 內部補償斜坡電壓 | 90 | mV | |||
| VOVP | 輸出過壓保護(相對于反饋電壓)(4) | VCOMP = 1.4V | 85 | mV | ||
| VCOMP = 1.4V,–40°C ≤ TJ ≤ 125°C | 26 | 135 | ||||
| VOVP(HYS) | 輸出過壓保護遲滯 | VCOMP = 1.4V | 70 | mV | ||
| VCOMP = 1.4V,–40°C ≤ TJ ≤ 125°C | 28 | 106 | ||||
| Gm | 誤差放大器跨導 | VCOMP = 1.4V | 450 | μS | ||
| VCOMP = 1.4V,–40°C ≤ TJ ≤ 125°C | 216 | 690 | ||||
| AVOL | 誤差放大器電壓增益 | VCOMP = 1.4V,IEAO = 100μA(拉電流/灌電流) | 60 | V/V | ||
| VCOMP = 1.4V,IEAO = 100μA(拉電流/灌電流),–40°C ≤ TJ ≤ 125°C | 35 | 66 | ||||
| IEAO | 誤差放大器輸出電流(拉電流/灌電流) | 拉電流,VCOMP = 1.4V,VFB = 0V | 640 | μA | ||
| 拉電流,VCOMP = 1.4V,VFB = 0V,–40°C ≤ TJ ≤ 125°C | 475 | 837 | ||||
| 灌電流,VCOMP = 1.4V,VFB = 1.4V | 65 | μA | ||||
| 灌電流,VCOMP = 1.4V,VFB = 1.4V,–40°C ≤ TJ ≤ 125℃ | 31 | 100 | ||||
| VEAO | 誤差放大器輸出電壓擺幅 | 上限:VFB = 0V,COMP 引腳懸空 | 2.70 | V | ||
| 上限:VFB = 0V,COMP 引腳懸空,–40°C ≤ TJ ≤ 125°C | 1.8 | 2.93 | ||||
| 下限:VFB = 1.4V | 0.60 | V | ||||
| 下限:VFB = 1.4V,–40°C ≤ TJ ≤ 125°C | 0.32 | 0.90 | ||||
| tSS | 內部軟啟動延遲 | VFB = 1.2V,COMP 引腳懸空 | 8.7 | 15 | 21.3 | ms |
| tr | 驅動引腳上升時間 | Cgs = 3000pf、VDR = 0V 至 3V | 25 | ns | ||
| tf | 驅動引腳下降時間 | Cgs = 3000pf、VDR = 3V 至 0V | 25 | ns | ||
| VSD | 關斷信號閾值(5)FA/SYNC/SD 引腳 | 輸出 = 高電平(關斷) | 1.31 | V | ||
| 輸出 = 高電平(關斷),–40°C ≤ TJ ≤ 125°C | 1.40 | |||||
| 輸出 = 低電平(使能) | 0.68 | V | ||||
| 輸出 = 低電平(使能),–40°C ≤ TJ ≤ 125°C | 0.40 | |||||
| ISD | 關斷引腳電流 FA/SYNC/SD 引腳 | VSD = 5V | -1 | μA | ||
| VSD = 0V | 20 | |||||
| TSD | 熱關斷 | 165 | °C | |||
| Tsh | 熱關斷遲滯 | 10 | °C | |||