And this thing just won't act right in Pspice...

I try to switch it on and off with a 0 - 5V signal but it doesn't really want to work.

So I noticed something in the netlist that looked odd:

---------------------------

.MODEL SST211 NMOS ( LEVEL = 7

+VERSION = 3.1 TNOM = 27 TOX = 1E-7

+XJ = 1.5E-7 NCH = 1.7E17 VTH0 = 1.0941063

+K1 = 2.4541877 K2 = -0.05 K3 = 80

+K3B = 0 W0 = 2.5E-6 NLX = 1.74E-7

+DVT0W = 0 DVT1W = 0 DVT2W = -0.032

+DVT0 = 2.2 DVT1 = 0.53 DVT2 = -0.032

+U0 = 537.6815365 UA = 1E-8 UB = 1.998E-18

+UC = 1.31205E-9 VSAT = 8.8E4 A0 = 0.93

+AGS = 0 B0 = 0 B1 = 0

+KETA = -0.047 A1 = 0 A2 = 1

+RDSW = 4E3 PRWG = 0 PRWB = 0

+WR = 1 WINT = 0 LINT = 0

+XL = 0 XW = 0 DWG = 0

+DWB = 0 VOFF = -0.0593033 NFACTOR = 0.2282159

+CIT = 0 CDSC = 1.5E-4 CDSCD = 0

+CDSCB = 0 ETA0 = 1E-7 ETAB = -0.07

+DSUB = 0.56 PCLM = 0.134 PDIBLC1 = 9.934E-5

+PDIBLC2 = 1.013829E-3 PDIBLCB = 0 DROUT = 0.01

+PSCBE1 = 8.456E8 PSCBE2 = 3E-6 PVAG = 0.1405676

+DELTA = 0.13 MOBMOD = 1 PRT = 0

+UTE = -1.5 KT1 = 0 KT1L = 0

+KT2 = 0 UA1 = 4.31E-9 UB1 = -7.61E-18

+UC1 = -5.6E-11 AT = 3.3E4 PHI = 0.7582363

+NQSMOD = 0 WL = 0 WLN = 1

+WW = 0 WWN = 1 WWL = 0

+LL = 0 LLN = 1 LW = 0

+LWN = 1 LWL = 0 CAPMOD = 2

+XPART = 0 CGDO = 1.91225E-9 CGSO = 3.146805E-9

+DLC = 0 DWC = 0 )

*

* W= 889.0um L= 0.5um

--------------------

Last two lines: the dimensions of the channel are commented out? Aren't they supposed to be inside the parenthesis?

I've tried moving the W and L parameters inside the parenthesis, but it still won't simulate correctly.

It's just my luck that the one DMOS switch in all the world that I have to simulate, doesn't work

Any insight into this will be appreciated.