On-Board Power Supplies for Communications Devices

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Roadmap and Circuit Diagram

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MOSFET

Polarity	Configuration	Product Name	PKG	VDSS (V)	VGSS (V)	ID(DC) (A)	Ron Max(mohm)		QG(nC) typ
							VGS=4.5V	VGS=10V
Nch	Single	μPA1744TP	HSOP8	100	±20	±10	-	30	63
		μPA1740TP	HSOP8	200	±30	±7.0	-	440	12
		2SK3634	TO-252	-	-	±6.0	-	600	9
		2SK3635	TO-252	-	-	±8.0	-	430	12
		2SK3712	TO-252	250	±30	±9.0	-	580	14
		μPA1741TP	HSOP8	-	-	±5.0	-	790	11
		μPA1742TP	HSOP8	-	-	±7.0	-	550	14
		μPA1743TP	HSOP8	-	-	±8.0	-	450	17

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SW Power-Supply ICs

Part Number	Input Voltage Range (V)	A.M.R.		Package	Oscillation Frequency (kHz)	Output Circuit Operation Mode	Remarks
		Output Current(mA)	Total Power Dissipation(W)
μPC494	7 to 40	250	0.78  *1	16 pin SOP (375mil)	1 to 300	Push-pull / Single selectable	General purpose
			0.65  *1	16 pin SOP (300mil)
μPC1094	11to 24	1200(peak)	0.55	14 pin SOP	50 to 500	Totem pole circuit configuration Single mode	AC-DC primary control
μPC1099	11.5 to 24	1200(peak)	0.694	16 pin SOP	50 to 500	Totem pole circuit configuration Single mode	AC-DC primary control
μPC1100	3.6 to 40	25	0.694	16 pin SOP	1 to 500	2 outputs (synchronous control possible) If one output is shorted, both outputs will be turned off	DC-DC converter
μPC1150	3.6 to 40	25	0.694	16 pin SOP	1 to 500	2 outputs (synchronous control possible) If one output is shorted, only the output will be turned off	DC-DC converter
μPC1905	12 to 30	1200(peak)	0.694	16 pin SOP	50 to 500	Totem pole circuit configuration Single mode	AC-DC primary control
μPC1933	2.5 to 20	20	0.48	16 pin SOP	20 to 800	Open drain 1output	DC-DC converter
μPC1934	2.5 to 20	20	0.417	16 pin SSOP	20 to 1000	Open drain 2 outputs	DC-DC converter
			0.4	16 pin TSSOP
μPC1935	2.5 to 20	20	0.4	16 pin TSSOP	20 to 800	Open drain 3 outputs	DC-DC converter
μPC1909	7 to 24	1200(peak)	1	16 pin DIP	50 to 500	Totem pole circuit configuration Q,/Q outputs	AC-DC primary control, ZCS*2
			0.694	16 pin SOP

*1: With 25cm2 X 1.6mm glass epoxy substrate
*2: It is necessary to obtain license from Vicor Corporation before using the µPC1909 in an active-clamp type circuit

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Shunt Regulators

Part Number	Output Current(A)	Reference Voltage(V)	Tolerance(%)	Output Voltage Range(V)	A.M.R.		Package	Remarks
					Input Voltage (V)	Total Power Dissipation(W)
μPC1093	0.15	2.495	+/- 2	2.5 to 36	37	0.48	8 pin SOP	-
						0.7	TO-92
						2 *1	SC-62 *3
						0.51 *2	SC-74A
μPC1943	0.05	1.26	+/- 2.6	1.26 to 24	25	1.6 *1	SC-62 *3	Low voltage
μPC1944	0.05	1.26	+/- 2.6	1.26 to 24	25	0.56	TO-92	Low voltage
						0.385	8 pin SOP
						1.6 *1	SC-62 *3
μPC1945	0.015	1.26	+/- 2	1.26 to 5	6	0.09	SC-74A	Low voltage

*1: With 16cm2 X 0.7mm ceramic substrate
*2: With 75cm2 X 0.7mm ceramic substrate
*3: Similar SOT-89

Introduction to Key Devices