ST STPS1L40M User Manual

®

STPS1L40M

LOW DROP POWER SCHOTTKY RECTIFIER

Table 1: Main Product Characteristics

IF(AV)	1 A
VRRM	40 V
Tj (max)	150°C
VF(max)	0.40 V

FEATURES AND BENEFITS

■Very small conduction losses

■Negligible switching losses

■Extremely fast switching

■Low forward voltage drop for higher efficiency and extented battery life

■Low thermal resistance

■Avalanche capability specified

DESCRIPTION

A

C

STmite

(DO216-AA)

Table 2: Order Code

Part Number	Marking
STPS1L40M	1L4

Single Schottky rectifier suited for switch mode power supplies and high frequency DC to DC converters.

Packaged in STmite, this device is intended for use in low voltage, high frequency inverters, free wheeling and polarity protection applications. Due to the small size of the package this device fits battery powered equipment (cellular, notebook, PDA’s, printers) as well chargers and PCMCIA cards.

Table 3: Absolute Ratings (limiting values)

Symbol		Parameter			Value	Unit
VRRM		Repetitive peak reverse voltage			40	V
IF(RMS)		RMS forward voltage			2	A
IF(AV)		Average forward current		Tc = 140°C δ = 0.5	1	A
IFSM		Surge non repetitive forward current		10 ms sinusoidal	50	A
PARM		Repetitive peak avalanche power		tp = 1µs Tj = 25°C	1200	W
Tstg		Storage temperature range			-65 to + 150	°C
Tj		Maximum operating junction temperature *			150	°C
dV/dt		Critical rate of rise of reverse voltage	(rated VR, Tj = 25°C)		10000	V/µs
dPtot	1
* : --------------- > ------------------------- thermal runaway condition for a diode on its own heatsink
dTj	Rth(j – a)
September 2004			REV. 3			1/6

STPS1L40M

Table 4: Thermal Resistance

Symbol	Parameter	Value	Unit
Rth(j-c)*	Junction to case	20	°C/W
Rth(j-l)*	Junction to ambient	250	°C/W

* Mounted with minimum recommended pad size, PC board FR4.

Table 5: Static Electrical Characteristics

Symbol	Parameter		Tests conditions				Min.	Typ	Max.	Unit
			Tj = 25°C	VR = VRRM				0.021	0.063
IR *	Reverse leakage current		Tj = 85°C					1.3	4.0	mA
			Tj = 25°C	VR = 20V				0.007	0.021
			Tj = 85°C					0.49	1.5
			Tj = 25°C	IF = 1A				0.40	0.46
VF *	Forward voltage drop		Tj = 85°C					0.35	0.40	V
			Tj = 25°C	IF = 3A				0.52	0.60
			Tj = 85°C					0.50	0.58
Pulse test:	* tp = 380 µs, δ < 2%						2
To evaluate the conduction losses use the following equation: P = 0.34 x I					+ 0.07 I
				F(AV)			F (RMS)

Figure 1: Conduction losses versus average current

PF(AV)(W)

0.55					δ = 0.1	δ = 0.2
0.50				δ = 0.05					δ = 0.5
0.45
0.40											δ = 1
0.35
0.30
0.25
0.20
0.15											T
0.10
0.05					IF(AV)(A)					δ=tp/T	tp
0.00
0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0	1.1	1.2

Figure 2: Average forward current versus ambient temperature (δ = 0.5)

IF(AV)(A)
1.1
1.0					Rth(j-a)=Rth(j-c)
0.9
0.8
0.7
0.6			Rth(j-a)=270°C/W
0.5
0.4
0.3
0.2
0.1			Tamb(°C)
0.0
0	25	50	75	100	125	150

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