Re: P-channel MOSFET model

On 09-05-2024 08:54, piglet wrote:

On 09/05/2024 02:21, Edward Rawde wrote:

"Bill Sloman" <bill.sloman@ieee.org> wrote in message
news:v1g1lq$kb1$1@dont-email.me...

On 8/05/2024 10:03 pm, piglet wrote:

On 06/05/2024 06:58, Edward Rawde wrote:

"John Larkin" <jjSNIPlarkin@highNONOlandtechnology.com> wrote in message
news:aesf3j1po3glh1c23se3lofoni6j7ol75m@4ax.com...

On Sun, 5 May 2024 14:42:30 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:

"Edward Rawde" <invalid@invalid.invalid> wrote in message
news:v16s2i$2uv4$1@nnrp.usenet.blueworldhosting.com...

Does anyone know of a P-channel MOSFET, roughly equivalent to

>
<snip>
>
Cutting and pasting piglet's .asc file into my version of LTSpice gave a
circuit that didn't do anything useful. M1 turns off after 2.67usec., and
that's it.

>
It works for me but I'd like something more efficient if possible.
>
My own latest creation does 5V 1A from 8V to 15V input but at 16V input it
stops and produces 16V so I'm not sure I'd trust this circuit in reality.
There is a character encoding issue which may affect the u symbol for
capacitors and inductors.
And line wraps may also need fixing.
>
Version 4
SHEET 1 2820 680
WIRE 1200 -112 240 -112
WIRE 208 -48 176 -48
WIRE 240 -48 240 -112
WIRE 240 -48 208 -48
WIRE 288 -48 240 -48
WIRE 368 -48 288 -48
WIRE 672 -48 368 -48
WIRE 800 -48 768 -48
WIRE 816 -48 800 -48
WIRE 864 -48 816 -48
WIRE 992 -48 944 -48
WIRE 1088 -48 992 -48
WIRE 1408 -48 1088 -48
WIRE 1504 -48 1408 -48
WIRE 1680 -48 1504 -48
WIRE 1200 -32 1200 -112
WIRE 368 0 368 -48
WIRE 384 0 368 0
WIRE 480 0 448 0
WIRE 560 0 544 0
WIRE 992 16 992 -48
WIRE 176 32 176 -48
WIRE 688 32 688 0
WIRE 1200 64 1200 48
WIRE 1312 64 1200 64
WIRE 288 80 288 -48
WIRE 816 80 816 -48
WIRE 1312 80 1312 64
WIRE 1408 80 1408 -48
WIRE 1504 80 1504 -48
WIRE 384 96 368 96
WIRE 480 96 448 96
WIRE 560 96 560 0
WIRE 560 96 544 96
WIRE 1072 112 1040 112
WIRE 1120 112 1072 112
WIRE 1184 112 1120 112
WIRE 1200 112 1200 64
WIRE 1200 112 1184 112
WIRE 1680 112 1680 -48
WIRE 1184 160 1184 112
WIRE 1200 160 1200 112
WIRE 176 176 176 112
WIRE 1264 176 1232 176
WIRE 1312 176 1312 160
WIRE 1312 176 1264 176
WIRE 368 192 368 96
WIRE 384 192 368 192
WIRE 480 192 448 192
WIRE 576 192 544 192
WIRE 592 192 576 192
WIRE 672 192 656 192
WIRE 688 192 688 112
WIRE 688 192 672 192
WIRE 720 192 688 192
WIRE 736 192 720 192
WIRE 928 192 800 192
WIRE 1168 192 928 192
WIRE 1040 208 1040 112
WIRE 1120 208 1120 112
WIRE 1264 208 1232 208
WIRE 1408 208 1408 160
WIRE 1408 208 1264 208
WIRE 1504 208 1504 160
WIRE 1504 208 1408 208
WIRE 576 224 576 192
WIRE 672 224 672 192
WIRE 1312 224 1312 176
WIRE 1408 224 1408 208
WIRE 176 336 176 256
WIRE 288 336 288 144
WIRE 288 336 176 336
WIRE 576 336 576 304
WIRE 576 336 288 336
WIRE 672 336 672 304
WIRE 672 336 576 336
WIRE 816 336 816 144
WIRE 816 336 672 336
WIRE 992 336 992 80
WIRE 992 336 816 336
WIRE 1040 336 1040 272
WIRE 1040 336 992 336
WIRE 1120 336 1120 272
WIRE 1120 336 1040 336
WIRE 1184 336 1184 224
WIRE 1184 336 1120 336
WIRE 1200 336 1200 224
WIRE 1200 336 1184 336
WIRE 1216 336 1216 224
WIRE 1216 336 1200 336
WIRE 1312 336 1312 304
WIRE 1312 336 1216 336
WIRE 1408 336 1408 304
WIRE 1408 336 1312 336
WIRE 1680 336 1680 192
WIRE 1680 336 1408 336
WIRE 176 352 176 336
FLAG 176 352 0
FLAG 208 -48 in
FLAG 720 192 gate
FLAG 1264 176 cmp-
FLAG 1264 208 cmp+
FLAG 928 192 cmpout
FLAG 1072 112 cmp5v
FLAG 1088 -48 out
FLAG 800 -48 sw
SYMBOL Comparators\LT1719 1200 128 M0
WINDOW 0 27 27 Left 2
WINDOW 3 -92 6 Left 2
SYMATTR InstName U1
SYMBOL res 1328 208 M0
WINDOW 0 -35 36 Left 2
WINDOW 3 -49 70 Left 2
SYMATTR InstName R2
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL ind 960 -64 R90
WINDOW 0 63 51 VBottom 2
WINDOW 3 -27 53 VTop 2
SYMATTR InstName L1
SYMATTR Value 100µ
SYMATTR SpiceLine Ipk=1.3 Rser=0.15 Rpar=0 Cpar=0 mfg="Murata"
pn="MDH10060C-101MA=P3"
SYMBOL res 1664 96 R0
WINDOW 0 40 39 Left 2
WINDOW 3 39 70 Left 2
SYMATTR InstName R4
SYMATTR Value 5
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1424 64 M0
WINDOW 0 -38 43 Left 2
WINDOW 3 -48 70 Left 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL schottky 832 144 R180
WINDOW 0 42 31 Left 2
WINDOW 3 -123 30 Left 2
SYMATTR InstName D2
SYMATTR Value MBRS130L
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL pmos 768 0 M270
WINDOW 0 25 128 VLeft 2
WINDOW 3 69 92 VLeft 2
SYMATTR InstName M1
SYMATTR Value AO6407
SYMBOL voltage 176 160 R0
WINDOW 0 11 100 Left 2
WINDOW 3 38 54 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 -185 81 Left 2
SYMATTR InstName V3
SYMATTR Value 12
SYMBOL cap 800 176 R90
WINDOW 0 63 30 VBottom 2
WINDOW 3 62 28 VTop 2
SYMATTR InstName C4
SYMATTR Value 0.01µ
SYMATTR SpiceLine V=16 Irms=0 Rser=0.0158 Lser=350p mfg="Würth Elektronik"
pn="885012008017 WCAP-CSGP 1206" type="NP0"
SYMBOL diode 592 208 R270
WINDOW 0 -30 34 VTop 2
WINDOW 3 69 29 VBottom 2
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL res 160 16 R0
SYMATTR InstName R8
SYMATTR Value 0.001
SYMBOL zener 1104 272 M180
WINDOW 0 42 35 Left 2
WINDOW 3 83 -95 Right 2
SYMATTR InstName D1
SYMATTR Value UMZ5_1N
SYMBOL res 1328 64 M0
WINDOW 0 -35 41 Left 2
WINDOW 3 -49 68 Left 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1216 -48 M0
WINDOW 0 -39 39 Left 2
WINDOW 3 -49 68 Left 2
SYMATTR InstName R6
SYMATTR Value 220
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 560 208 R0
WINDOW 0 38 56 Left 2
WINDOW 3 33 84 Left 2
SYMATTR InstName R7
SYMATTR Value 3.9K
SYMBOL cap 1056 272 R180
WINDOW 0 -35 33 Left 2
WINDOW 3 -53 3 Left 2
SYMATTR InstName C3
SYMATTR Value 0.1µ
SYMATTR SpiceLine V=6.3 Irms=0 Rser=0.0337 Lser=180p mfg="Würth Elektronik"
pn="885012104009 WCAP-CSGP 0201" type="X5R"
SYMBOL diode 480 208 R270
WINDOW 0 35 34 VTop 2
WINDOW 3 -9 28 VBottom 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL diode 384 16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL diode 384 208 R270
WINDOW 0 35 33 VTop 2
WINDOW 3 -6 32 VBottom 2
SYMATTR InstName D6
SYMATTR Value 1N4148
SYMBOL diode 448 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D7
SYMATTR Value 1N4148
SYMBOL diode 544 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D8
SYMATTR Value 1N4148
SYMBOL diode 480 16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D10
SYMATTR Value 1N4148
SYMBOL polcap 976 16 R0
WINDOW 3 24 56 Left 2
WINDOW 0 27 9 Left 2
SYMATTR Value 100µ
SYMATTR InstName C1
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=6.3 Irms=0 Rser=0.9 Lser=0 mfg="AVX" pn="TAJD107M006"
type="Tantalum"
SYMBOL res 1424 208 M0
WINDOW 0 -38 36 Left 2
WINDOW 3 -52 69 Left 2
SYMATTR InstName R5
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 1520 64 M0
WINDOW 0 -38 43 Left 2
WINDOW 3 -63 70 Left 2
SYMATTR InstName R9
SYMATTR Value 220K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 704 16 M0
WINDOW 0 40 30 Left 2
WINDOW 3 42 61 Left 2
SYMATTR InstName R10
SYMATTR Value 3.3
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL polcap 272 80 R0
WINDOW 3 24 56 Left 2
WINDOW 0 27 9 Left 2
SYMATTR Value 100µ
SYMATTR InstName C2
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=6.3 Irms=0 Rser=0.9 Lser=0 mfg="AVX" pn="TAJD107M006"
type="Tantalum"
SYMBOL res 688 208 M0
WINDOW 0 -54 68 Left 2
WINDOW 3 -76 93 Left 2
SYMATTR InstName R11
SYMATTR Value 1000K
SYMATTR SpiceLine tol=1 pwr=0.1
TEXT 208 352 Left 2 !.tran 0.001 startup
>
>

  I thought you wanted to drive LEDs? But if you really wanted 12V to ground referenced 5V then here is my offering ...
  Version 4
SHEET 1 912 680
WIRE -496 -160 -720 -160
WIRE -224 -160 -496 -160
WIRE -48 -160 -224 -160
WIRE 176 -160 -48 -160
WIRE -224 -80 -224 -160
WIRE -48 -80 -48 -160
WIRE -496 -32 -496 -160
WIRE -128 -32 -160 -32
WIRE -112 -32 -128 -32
WIRE -128 32 -128 -32
WIRE -48 32 -48 16
WIRE -48 32 -128 32
WIRE 176 48 176 -160
WIRE -224 64 -224 16
WIRE 128 64 -224 64
WIRE -720 160 -720 -160
WIRE -336 160 -368 160
WIRE 176 160 176 144
WIRE 176 160 -256 160
WIRE 176 208 176 160
WIRE 256 208 176 208
WIRE 416 208 336 208
WIRE 512 208 416 208
WIRE 704 208 512 208
WIRE -224 224 -224 64
WIRE -48 224 -48 32
WIRE 512 240 512 208
WIRE -496 272 -496 48
WIRE -464 272 -496 272
WIRE -368 272 -368 160
WIRE -368 272 -384 272
WIRE -288 272 -368 272
WIRE 416 272 416 208
WIRE 416 272 16 272
WIRE 704 288 704 208
WIRE -496 336 -496 272
WIRE -224 336 -224 320
WIRE -144 336 -224 336
WIRE -48 336 -48 320
WIRE -48 336 -144 336
WIRE 512 336 512 304
WIRE 176 352 176 208
WIRE -144 384 -144 336
WIRE -720 496 -720 240
WIRE -496 496 -496 400
WIRE -496 496 -720 496
WIRE -144 496 -144 464
WIRE -144 496 -496 496
WIRE 176 496 176 416
WIRE 176 496 -144 496
WIRE 512 496 512 416
WIRE 512 496 176 496
WIRE 704 496 704 368
WIRE 704 496 512 496
WIRE -720 544 -720 496
FLAG -720 544 0
SYMBOL pmos 128 144 M180
SYMATTR InstName M1
SYMATTR Value RRR030P03
SYMBOL schottky 192 416 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind 240 224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 0.047m
SYMBOL cap 496 240 R0
SYMATTR InstName C1
SYMATTR Value 0.1m
SYMBOL res 496 320 R0
SYMATTR InstName Resr
SYMATTR Value 0.1
SYMBOL npn -288 224 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL npn 16 224 M0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL pnp -160 16 R180
SYMATTR InstName Q3
SYMATTR Value 2N3906
SYMBOL pnp -112 16 M180
SYMATTR InstName Q4
SYMATTR Value 2N3906
SYMBOL zener -480 400 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value UMZ5_1N
SYMBOL res -160 368 R0
SYMATTR InstName R4
SYMATTR Value 330
SYMBOL res -368 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1.5k
SYMBOL res -480 64 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R1
SYMATTR Value 1.5k
SYMBOL res 720 384 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName Rload
SYMATTR Value 5
SYMBOL voltage -720 144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res -240 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 150k
TEXT 494 552 Left 2 !.tran 10m
TEXT 496 -160 Left 2 ;EPW SED MAY 2024
TEXT 440 -112 Left 2 ;SIMPLE BUCK 12V TO 5V
 piglet
 

If you add a small resistance in series with the inductor, the loop is forced to run semi current mode, which will also help on startup behaviour:
Version 4
SHEET 1 912 680
WIRE -496 -160 -720 -160
WIRE -224 -160 -496 -160
WIRE -48 -160 -224 -160
WIRE 176 -160 -48 -160
WIRE -224 -80 -224 -160
WIRE -48 -80 -48 -160
WIRE -496 -32 -496 -160
WIRE -128 -32 -160 -32
WIRE -112 -32 -128 -32
WIRE -128 32 -128 -32
WIRE -48 32 -48 16
WIRE -48 32 -128 32
WIRE 176 48 176 -160
WIRE -224 64 -224 16
WIRE 128 64 -224 64
WIRE -720 160 -720 -160
WIRE -336 160 -368 160
WIRE 176 160 176 144
WIRE 176 160 -256 160
WIRE 176 208 176 160
WIRE 256 208 176 208
WIRE 384 208 336 208
WIRE 400 208 384 208
WIRE 608 208 480 208
WIRE 800 208 608 208
WIRE -224 224 -224 64
WIRE -48 224 -48 32
WIRE 608 240 608 208
WIRE -496 272 -496 48
WIRE -464 272 -496 272
WIRE -368 272 -368 160
WIRE -368 272 -384 272
WIRE -288 272 -368 272
WIRE 384 272 384 208
WIRE 384 272 16 272
WIRE 800 288 800 208
WIRE -496 336 -496 272
WIRE -224 336 -224 320
WIRE -144 336 -224 336
WIRE -48 336 -48 320
WIRE -48 336 -144 336
WIRE 608 336 608 304
WIRE 176 352 176 208
WIRE -144 384 -144 336
WIRE -720 496 -720 240
WIRE -496 496 -496 400
WIRE -496 496 -720 496
WIRE -144 496 -144 464
WIRE -144 496 -496 496
WIRE 176 496 176 416
WIRE 176 496 -144 496
WIRE 608 496 608 416
WIRE 608 496 176 496
WIRE 800 496 800 368
WIRE 800 496 608 496
WIRE -720 544 -720 496
FLAG -720 544 0
SYMBOL pmos 128 144 M180
SYMATTR InstName M1
SYMATTR Value RRR030P03
SYMBOL schottky 192 416 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind 240 224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 0.047m
SYMBOL cap 592 240 R0
SYMATTR InstName C1
SYMATTR Value 0.1m
SYMBOL res 592 320 R0
SYMATTR InstName Resr
SYMATTR Value 0.1
SYMBOL npn -288 224 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL npn 16 224 M0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL pnp -160 16 R180
SYMATTR InstName Q3
SYMATTR Value 2N3906
SYMBOL pnp -112 16 M180
SYMATTR InstName Q4
SYMATTR Value 2N3906
SYMBOL zener -480 400 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value BZX84C6V2L
SYMBOL res -160 368 R0
SYMATTR InstName R4
SYMATTR Value 330
SYMBOL res -368 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1.5k
SYMBOL res -480 64 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R1
SYMATTR Value 1.5k
SYMBOL res 816 384 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName Rload
SYMATTR Value 5
SYMBOL voltage -720 144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res -240 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 150k
SYMBOL res 496 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 0.1
TEXT 496 552 Left 2 !.tran 10m
TEXT 496 -160 Left 2 ;EPW SED MAY 2024
TEXT 440 -112 Left 2 ;SIMPLE BUCK 12V TO 5V