The JTM3406 is high efficiency synchronous,PWM step-down DC/(2)

五,产品封装图 (Package)

PIN NUMBER SOT-23- 5	PIN NAME	FUNCTION
1	EN	ON/OFF Control (High Enable)
2	GND	Ground
3	SW	Switch Output
4	VIN	Input
5	VFB	Output

六.电路原理图

七,功能概述

INDUCTOR SELECTION
For most applications, the value of the inductor will fall in the range of 1µH to 4.7µH. Its value is
chosen based on the desired ripple current. Large value inductors lower ripple current and small
value inductors result in higher ripple currents. Higher VIN or VOUT also increases the ripple

current as shown in equation 1. A reasonable starting point for setting ripple current is
IL =240mA (40% of 600mA).
The DC current rating of the inductor should be at least equal to the maximum load current plus
half the ripple current to prevent core saturation. Thus, a 720mA rated inductor should be
enough for most applications (600mA + 120mA). For better efficiency, choose a low DC-resistance
inductor.
Different core materials and shapes will change the size/current and price/current relationship of
an inductor. Toroid or shielded pot cores in ferrite or permalloy materials are small and don’t
radiate much energy, but generally cost more than powdered iron core inductors with similar
electrical characteristics. The choice of which style inductor to use often depends more on the

price vs size requirements and any radiated field/EMI requirements than on what the jtm3406

requires to operate. Table 1 shows some typical surface mount inductors that work well in

八,相关产品

单N沟道低压MOS场效应管

型号	沟道	VDS	VGS	VTH	ID	IDM	RDS(on)	封装	状态	直接替代型号
		(Max)			(Max)		(Max)
JTM2302/A	N沟道	20V	10V	0.75V	3A	10A	30mΩ	SOT23	量产	Si2302/AP2302/XP151A
								SOT23-3L		APM2314/IRLML2502
JTM2302B	N沟道	20V	12V	0.85V	2.5A	10A	46mΩ	SOT23	量产	Si2302/AP2302/XP151A
										APM2314/IRLML2502
JTM2306/A	N沟道	30V	12V	0.9V	5.8A	22A	25mΩ	SOT23	量产	AP2306/SI2306
								SOT23-3L		APM2306/WNM2306
JTM2300/B	N沟道	20V	12V	0.65V	4.5A	13.5A	22mΩ	SOT23	量产	AP2312/SI2312
								SOT23-3L		SI2300/AP2300
JTM2312/B	N沟道	20V	12V	0.65V	4.5A	13.5A	22mΩ	SOT23	量产	AP2312/SI2312
								SOT23-3L		SI2300/AP2300
JTM2314/B	N沟道	20V	12V	0.65V	4.5A	13.5A	22mΩ	SOT23	量产	AP2314/SI2314
								SOT23-3L		SI2312/AP2312
JTM3400/B	N沟道	30V	12V	0.9V	5.8A	30A	25mΩ	SOT23	量产	AO3400/AO3402/AP2306
								SOT23-3L		SI2306/APM2306/WNM2306
JTM3400C	N沟道	30V	20V	1.5V	3.6A	15A	40mΩ	SOT23	量产	AO3400/AO3402/AO3406/AP2306
										SI2306/APM2306/WNM2306
JTM3406/B	N沟道	30V	20V	1.6V	5.8A	20A	25mΩ	SOT23	量产	AO3406/AP2306
								SOT23-3L		SI2306/APM2306/WNM2306
JTM3414/B	N沟道	20V	10V	0.75V	3.0A	10A	30mΩ	SOT23	量产	AO3414
								SOT23-3L
JTM3416E	N沟道	20V	12V	0.7V	6.0A	30A	19mΩ	SOT23-3L	量产	AO3416
	带ESD保护
JTM3420/B	N沟道	20V	12V	0.65V	4.5A	13.5A	22mΩ	SOT23	量产	AO3420/SI2300
								SOT23-3L		SI2312/AP2300
JTM2318	N沟道	40V	20V	2.0V	4.0A	20A	32mΩ	SOT23-3L	量产	Si2318
JTM6400	N沟道	30V	12V	0.9V	6.9A	30A	25mΩ	SOT23-6L	量产	AO6400/SI3456/AP2602/AO6404
JTM7002	N沟道	60V	20V	1.7V	0.115A	0.8A	1.3Ω	SOT23	量产	2N7002/BSS138/FDV301N
JTM2310	N沟道	60V	20V	1.4V	3A	10A	105mΩ	SOT23-3L	量产	AP2310GN/APM2360A/AO3422
										IRFL014/UT3N06
JTM3422	N沟道	60V	20V	1.4V	3A	10A	105mΩ	SOT23-3L	量产	AO3422/AP2310GN/APM2360A
										CES2362/VN3205/VN2204
										IRFL014/UT3N06
JTM2N10MR	N沟道	100V	20V	1.8V	2A	5A	210mΩ	SOT23-3L	量产
JTM2324E	N沟道	100V	20V	1V	2.7A	10A	140mΩ	SOT23-3L	量产	Si2324/Si2328
	带ESD保护									Si2392/AO3442
JTM4410	N沟道	30V	20V	1.6V	10A	50A	7.5mΩ	SOP8	量产	AO4410/AO4403/APM4410
										CEM4410/AP4410/FDS4410
										IRF7832/IRF7805Z
JTM4412	N沟道	30V	20V	1.0V	7A	30A	22mΩ	SOP8	量产	AO4412/APM4412/CEM4412
										AP4412/FDS4412/AO4414/ME4414
JTM4430	N沟道	30V	20V	1.6V	18A	50A	7.5mΩ	SOP8	量产	AO4430/APM4430/CEM4430
										AP4430/FDS4430/SI4166
JTM4480	N沟道	40V	20V	2.0V	20A	50A	16mΩ	SOP8	量产	AO4480/AO4240/IRF7842
										Si4840BDY/Si4124DY
JTM4440	N沟道	60V	20V	2V	4.5A	20A	45mΩ	SOP8	量产	AO4440/AP9971/STS5NF60L
JTM4486E	N沟道	100V	20V	2V	3.5A	20A	85mΩ	SOP8	量产	AO4486
	带ESD保护
JTM4488	N沟道	150V	20V	3.2V	5.2A	42A	31mΩ	SOP8	量产	AO4488
JTM4490	N沟道	200V	20V	3.0V	3.9A	30A	56mΩ	SOP8	量产	AO4490

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