SPX2945S-5-0_技术文档

SPX2945

400mA Low Dropout Voltage Regulator with Shutdown

FEATURES

1.2V to 20V

1

7

8

+V_IN

V_OUT

FB

+

■ Output 3.3V, 5.0V at 400mA Output

■ Very Low Quiescent Current, 100µA

■ Low Dropout Voltage, 420mV at 400mA

■ Extremely Tight Load and Line Regulation

■ Very Low Temperature Coefficient

■ Current & Thermal Limiting

100K

OFF

0.01µF

10µF

R₁

SPX2945

______

SHUTDOWN

INPUT

ERROR

SD

ERROR

3

5

OUTPUT

GND

4

V_REF

R₂

5V

+

ON

Adjustable Regulator

■ Error Flag Warns Of Output Dropout

■ Logic-Controlled Electronic Shutdown

V_IN

IN

OUT

SPX2945

■ Output Programmable From 1.24V to 20V

(for SO-8)

+

2.2 µF

GND

0.1 µF

5V Regulator Circuit

Now Available in Lead Free Packaging

DESCRIPTION

TheSPX2945isalowpowervoltageregulator.Thisdeviceisanexcellentchoiceforuseinbattery-powered

applications such as cordless telephones, radio control systems, and portable computers. The SPX2945

features very low quiescent current (100µA Typ.) and very low dropout voltage. This includes a tight initial

tolerance of 1% max and very low output temperature coefficient, making the SPX2945 useful as a low-

power voltage reference.

The error flag output feature is used as power-on reset for warning of a low output voltage, due to a falling

voltage input of batteries. Another feature is the logic-compatible shutdown input which enables the

regulator to be switched on and off. The SPX2945 is offered in 3-pin TO-220 package, SO-8 (same pin

out as SPX2951), SOT-223, surface mount 3-Pin TO-252, 3-Pin TO-263 packages and 5-Pin TO-263.

The regulator output voltage (of the 8-pin SO-8) may be pin-strapped for a 3.3V and 5.0V or programmed

from1.24Vto20Vwithanexternalpairofresistors. LookforSPX2951for150mAandSPX2954for250mA

applications.

TO-252 (R)

TO-263-5 (T5)

8-Pin Surface Mount

SOT-223 (M3)

(S)

TO-220-3 (U)

TO-263-3 (T)

V_OU

1

8

7

V_IN

SPX2945

2

SENS

SHUTDOWN

GN

FEEDBACK

5V/ 3.3V TAP

ERRO

SPX2945

1

2

3

5 Pin TO-263

1

2

3

1

3

2

3

4

6

5

1

2

3

1

2 3 4 5

V_IN

V_OU

GN

V_INGN V_OU

V_INGN

V_OU

V_INGN V_OU

Note: Tab is Ground

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

1

ABSOLUTE MAXIMUM RATINGS

Power Dissipation ........................................................ Internally Limited

Lead Temp. (Soldering, 5 Seconds) ............................................. 260°C

Storage Temperature Range ........................................ -65°C to +150°C

Operating Junction Temperature Range ....................... -40°C to +125°C

Input Supply Voltage ......................................................... -20V to +26V

Feedback Input Voltage ................................................ -1.5V to +26V

Shutdown Input Voltage ................................................ -0.3V to +26V

Error Comparator Output .............................................. -0.3V to +26V

ESD Rating ............................................................................ 2kV Min

ELECTRICAL CHARACTERISTICS

Electrical characteristics at V_IN= V_O+1V, I_O= 1mA, C_OUT= 2.2µF, T_A= 25°C, unless otherwise specified. The ♦ denotes

the specifications wich apply over full operating tempeture range -40°C to +85°C, unless noted.

PARAMETER

CONDITIONS

(Note 2)

MIN

TYP

MAX

UNITS

3.3V Version

Output Voltage

3.267

3.217

3.3

3.333

3.382

V

1mA ≤ I_L≤ 400mA

♦

5.0V Version

Output Voltage

4.950

4.880

5.0

5.050

5.120

V

All Voltage Options

Output Voltage

Temperature Coefficient

Line Regulation (Note 3)

Load Regulation (Note 3)

20

100

20

30

♦

ppm/°C

(Note1)

6V ≤ V_IN≤ 20V (Note 4)

I_L=1 to 400mA

1.5

6

♦

mV

Dropout Voltage (Note5)

I_L=1mA

60

100

150

450

700

mV

♦

I_L=400mA

360

Ground Current

I_L=1mA

100

2

200

300

4

6

8

12

15

25

800

0.2

µA

♦

I_L=150mA

I_L=300mA

I_L=400mA

mA

4

8

♦

Current Limit

Thermal Regulation

V_OUT=0

330

0.05

mA

%/W

Output Noise, 10Hz to 100kHz, C_L=2.2µF

400

260

µV_RMS

I_L=100mA

C_L=33µF

PSRR at 100KHz

I_L=100mA

31

dB

C_L=10µF

Adjustable 8 Pin Version only

Reference Voltage

1.210

1.185

1.235

1.260

1.285

V

Over Temperature

Feedback Pin Bias Current

20

40

60

nA

♦

Reference Voltage Temp.

Coefficient

ppm/°C

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

2

ELECTRICAL CHARACTERISTICS: Continued

Electrical characteristics at V_IN= V_O+1V, I_O= 1mA, C_OUT= 2.2µF, T_A= 25°C, unless otherwise specified. ♦ applies over the

full operating temperature range.

PARAMETER

CONDITIONS

(Note 2)

MIN

TYP

0.1

0.01

150

60

MAX

♦

UNITS

nA/°C

µA

Feedback Pin Bieas Current

Temperature Coefficient

Output Leakage Current

V_0H=20V

1

2

250

400

♦

Output Low Voltage

V_IN=4.5V

I_0L=400µA

mV

♦

Upper Threshold Voltage

Lower Threshold Voltage

(Note 6)

Low (Regulator ON)

High (Regulator OFF)

VS=2.4V

40

25

mV

75

95

140

mV

♦

Hysteresis

Input Logic Voltage

15

mV

V

0.7

2.0

50

♦

1.3

30

Shutdown Pin Input Current

µA

100

600

750

♦

VS=26V

450

3

Regulator Output Current

in Shutdown

(Note 7)

10

20

µA

♦

Thermal Resistance

Theta Junction-Ambient θJA

TO-220-3

TO-263-3

TO-263-5

NSOIC-8

SOT-223

TO-252

29.4

31.4

31.2

128.4

62.3

50

♦

°C/W

Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by

the total temperature range.

Note2: UnlessotherwisespecifiedalllimitsareguaranteedforT_j=25°C,V_IN=6V,I_L=1mAandC_L=2.2µF. Additional

conditions for the 8-pin versions are feedback tied to 5V/3.3V tap and output tied to output sense (V_OUT= 5V) and

V

_SHUTDOWN≤ 0.8V.

Note3: Regulationismeasuredatconstantjunctiontemperature, usingpulsetestingwithalowdutycycle. Changes

in output voltage due to heating effects are covered under the specification for thermal regulation.

Note 4: Line regulation for the SPX2945 is tested at 150°C for I_L= 1 mA. For T_J= 125°C, line regulation is guaranteed

by design.

Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below

its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input

supply voltage of 2V ( 2.3V over temperature) must be taken into account.

Note 6: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the

nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change,

multiply by the error amplifier gain = V /V_REF= (R1 + R2)/R2. For example, at a programmed output voltage of 5V,

the Error output is guaranteed to go lo^Ow^UTwhen the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds remain

constantasapercentofV_OUTasV_OUTisvaried,withthedropoutwarningoccurringattypically5%belownominal,7.5%

guaranteed.

Note 7: V_SHUTDOWN≥ 2V, V_IN≤ 26V, V_OUT= 0, Feedback pin tied to 5V/3.3V Tap.

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

3

SPX2945 - 5.0V BLOCK DIAGRAM

UNREGULATED DC

5V at 400mA

1

7

8

MAX

+

FEEDBACK

OUTPUT

INPUT

2

SENSE

.

180kΩ

6

+

_

ERROR

AMPLIFIER

3

FROM

CMOS OR

TTL

5V TAP

330kΩ .

SHUTDOWN

+

60kΩ .

5

+

1µF

+

_

______

60 mV

ERROR

ERROR DETECTION

COMPARATOR

TO CMOS OR

TTL

1.23V

+

4

REFERENCE

GROUND

APPLICATION INFORMATION

External Capacitors

The SPX2945, unlike other low dropout regu-

lators will remain stable and in regulation with

no load in addition to the internal voltage di-

vider. This feature is especially important in

applications like CMOS RAM keep-alive.

The stability of the SPX2945 requires a 2.2µF or

greater capacitor between output and ground.

Oscillation could occur without this capacitor.

Most types of tantalum or aluminum electrolytic

works fine here. For operations of below -25°C

solid tantalum is recommended since the many

aluminum types have electrolytes that freeze at

about -30°C. The ESR of about 5Ω or less and

resonant frequency above 500kHz are the most

important parameters in the value of the capaci-

tor. The capacitor value can be increased with-

out limit.

If there is more than 10 inches of wire between

the input and the AC filter capacitor, or if a

battery is used as the input, then a 0.1µF tanta-

lum or aluminum electrolytic capacitor should

be placed from the input to the ground.

Instability can occur if there is stray capaci-

tancetotheSPX2945feedbackterminal(pin7).

This could cause more problems when using a

higher value of external resistors to set the

output voltage.

At lower values of output current, less output

capacitance is required for stability. For the

currents below 10mA the value of the capacitor

can be reduced to 0.5µF and 0.15µF for 1mA.

More output capacitance needed for the 8-pin

version at voltages below 5V since it runs the

error amplifier at lower gain. At worst case

4.7µF or greater must be used for the condition

of 250mA load at 1.23V output.

This problem can be fixed by adding a 100pF

capacitor between output and feedback and

increasingtheoutputcapacitortoatleast3.3µF.

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

4

Error Detection Comparator Output

2% in V , which may be eliminated at room

temperat^Ou^Ur^Te by trimming R₁. To improve the

accuracy choose the value of R = 100k; this

reduces the error by 0.17% and²increases the

resistor program current by 12µA. Since the

SPX2945 typically draws 60 µA at no load with

Pin 2 open-circuited this is a small price to pay.

The Comparator produces a logic low output

whenever the SPX2945 output falls out of regu-

lation by more than around 5%. This is around

60mV offset divided by the 1.235 reference

voltage. This trip level remains 5% below

normal regardless of the programmed output

voltage of the regulator. Figure 1 shows the

timing diagram depicting the ERROR signal

andtheregulatoroutputvoltageastheSPX2945

input is ramped up and down. The ERROR

signal becomes low at around 1.3V input, and

goes high around 5V input (input voltage at

which V_OUT= 4.75). Since the SPX2945’s

dropout voltage is load dependent, the input

voltage trip point (around 5V) will vary with the

load current. The output voltage trip point

(approx. 4.75V) does not vary with load.

Reducing Output Noise

It may be an advantage to reduce the AC noise

present at the output. One way is to reduce the

regulator bandwidth by increasing the size of

the output capacitor. This is the only way that

noise can be reduced on the 3 lead SPX2945 but

is relatively inefficient, as increasing the ca-

pacitor from 1µF to 220µF only decreases the

noise from 430µV to 160µV Vrms for a 100kHz

bandwidth at 5V output. Noise could also be

reduced fourfold by a bypass capacitor across

R , sinceitreducesthehighfrequencygainfrom

4 ¹to unity. Pick

The error comparator has an open-collector out-

put, which requires an external pull-up resistor.

Depending on the system requirements the re-

sistor may be returned to 5V output or other

supply voltage. In determining the value of this

resistor, note that the output is rated to sink

400µA; this value adds to battery drain in a low

battery condition. Suggested values range from

100K to 1MΩ. If the output is unused this

resistor is not required.

C

_BYPASS≅1 / 2πR₁x 200 Hz

or choose 0.01µF. When doing this, the output

capacitor must be increased to 3.3µF to main-

tain stability. These changes reduce the output

noise from 430µV to 100µV Vrms for a 100kHz

bandwidth at 5V output. With the bypass ca-

pacitor added, noise no longer scales with out-

put voltage so that improvements are more dra-

matic at higher output voltages.

Programming the Output Voltage of

SPX2945

The SPX2945 may be pin-strapped for 5V or

3.3V using its internal voltage divider by tying

Pin 1 (output) to Pin 2 (sense) and Pin 7 (feed-

back) to Pin 6 (5V/3.3V Tap).

Also, it may be programmed for any output

voltage between its 1.235V reference and its

20V maximum rating. As seen in Figure 2, an

external pair of resistors is required.

4.75V

OUTPUT

VOLTAGE

Refer to the below equation for the program-

ming of the output voltage::

_______

ERROR*

V_OUT= V_REFx ( 1 + R₁/ R₂)+ I_FBR₁

The V_REFis 1.235 and I_FBis the feedback bias

current, nominally -20nA. The minimum rec-

ommended load current of 1 µA forces an upper

limit of 1.2 MΩ on value of R₂. If no load is

presented the I_FBproduces an error of typically

+

5.0V

INPUT

VOLTAGE

+

1.3V

+

* See Application Info.

Figure 1. ERROR Output Timing

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

5

PACKAGE: 3 PIN TO-252

E1

E

b3

L3

D1

D

H

1

2

3

(L1)

L4

L5

BACK VIEW

e

b

θ1

FRONT VIEW

b2

SIDE VIEW

L

Gauge

Plane

A

Seating Plane

C2

L2

θ

c

A1

3 Pin TO-252

JEDEC TO-252

Variation AA

Dimensions in Millimeters

Conversion Factor:

1 Inch = 25.40 mm

Dimensions in Inches:

Controlling Dimension

SYMBOL

MIN

0.086

-

0.025

0.030

0.195

0.018

0.235

NOM

-

MAX

MIN

2.18

-

0.64

0.76

4.95

0.46

5.97

NOM

-

MAX

2.39

0.13

0.89

1.14

5.46

0.61

0.89

6.22

A

A1

b

b2

b3

c

c2

D

0.094

0.005

0.035

0.045

0.215

0.024

0.035

0.245

0.240

6.10

D1

0.205

-

5.21

-

E

E1

e

0.250

0.170

-

0.265

-

6.35

4.32

-

6.73

-

.090 BSC

2.29 BSC

H

L

0.370

0.055

-

0.410

0.070

9.4

1.4

-

10.41

1.78

0.060

1.52

L1

L2

L3

L4

L5

ø

.108 REF

.020 BSC

2.74 REF

0.51 BSC

0.035

-

0.045

0º

-

0.050

0.040

0.060

10º

0.89

-

1.14

0º

-

1.27

1.02

1.52

10º

ø1

0º

15º

0º

15º

SIPEX Pkg Signoff Date/Rev:

JL Aug4-05/Rev A

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

6

PACKAGE: 3 PIN TO-220

Thermal

Pad

E

E2

øP

Q

(H1)

D2

D

D1

1

L1

FRONT

VIEW

b2

BACK

VIEW

L

e1

E1

e

b

Seating

Plane

A

3 Pin TO-220

JEDEC TO-220

Variation AB

Dimensions in Millimeters:

Conversion Factor:

A1

Dimensions in Inches:

Controlling Dimension

SYMBOL

1 Inch = 25.40 mm

MIN

0.140

0.020

0.080

0.015

0.045

0.014

0.560

0.330

0.480

0.380

0.270

-

NOM

-

0.027

0.057

-

MAX

0.190

0.055

0.115

0.040

0.070

0.024

0.650

0.355

0.507

0.420

0.350

0.030

MIN

3.56

0.51

2.03

0.25

1.14

0.25

14.22

8.38

12.19

9.65

6.86

-

NOM

-

0.51

1.45

-

MAX

4.83

1.27

2.79

1.02

1.78

0.51

16.51

8.89

12.70

10.67

8.89

0.76

H1

A

A1

A2

b

b2

c

SIDE

VIEW

Chamfer

Optional

D

D1

D2

E

E1

E2

e

-

.100 BSC

2.54 BSC

e1

H1

L

L1

ΦP

Q

.200 BSC

5.08 BSC

0.230

0.500

-

0.139

0.100

-

0.270

0.580

0.250

0.161

0.135

5.84

12.70

-

3.30

2.54

-

6.86

14.73

6.35

4.06

3.30

C

A2

SIPEX Pkg Signoff Date/Rev:

JL Aug4-05 / Rev A

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

7

PACKAGE: 5 PIN TO-263

Seating

Plane

E

A

E/2

C2

L1

Chamfer

Optional

H

D

1

4

3

5

2

c

SIDE VIEW

See Detail C

e

b

FRONT VIEW

Gauge Plane

Seating

Plane

θ

L3

DETAIL C

A1

L

Thermal

Pad

BACK VIEW

5 Pin TO-263 JEDEC TO-263

Variation BA

(L1)

Millimeters

Conversion Factor:

1 Inch = 25.40 mm

Inches

Controlling Dimension

SYMBOL

MIN

NOM

-

MAX

0.190

0.010

0.039

0.029

0.065

0.380

-

MIN

NOM

-

MAX

D1

A

A1

b

c

c2

D

D1

E

E1

e

0.160

0.000

0.020

0.015

0.045

0.330

0.270

0.380

0.245

4.06

0.00

0.51

0.38

11.43

8.38

6.86

9.65

6.22

4.83

0.25

0.99

0.74

5.84

9.65

-

0.420

-

10.67

-

.067 BSC

17.02 BSC

H

L

L1

L3

O

0.575

0.070

-

0.625

0.110

0.066

14.61

1.78

-

15.88

2.79

1.68

.010 BSC

-

2.54 BSC

-

0˚

8˚

0˚

8˚

SIPEX Pkg Signoff Date/Rev:

JL Jan18-06/Rev A

E1

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

8

PACKAGE: 3 PIN TO-263

E

Seating

Plane

A

E/2

C2

L1

SIDE VIEW

H

D

Chamfer

Optional

1

2

3

c

e

See Detail C

b

b2

Gauge Plane

Seating

Plane

FRONT VIEW

θ

L3

A1

L

DETAIL C

Thermal

Pad

3 Pin TO-263 JEDEC TO-263

Variation AA

Millimeters

Conversion Factor:

1 Inch = 25.40 mm

(L1)

Inches

Controlling Dimension

SYMBOL

MIN

NOM

-

MAX

0.190

0.010

0.039

0.070

0.029

0.065

0.380

-

MIN

4.06

0.00

0.51

1.14

0.38

1.14

8.38

6.86

9.65

6.22

NOM

-

MAX

D1

A

A1

b

b2

c

c2

D

D1

E

0.160

0.000

0.020

0.045

0.015

0.045

0.330

0.270

0.380

0.245

4.83

0.25

0.99

1.78

0.74

1.65

9.65

-

0.420

-

10.67

-

E1

e

.100 BSC

2.54 BSC

H

L

L1

L3

O

0.575

0.070

-

0.625

0.110

0.066

14.61

1.78

-

15.88

2.79

1.68

BACK

VIEW

.010 BSC

-

0.25 BSC

-

0˚

8˚

0˚

8˚

E1

SIPEX Pkg Signoff Date/Rev:

JL Aug5-05 / Rev A

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

9

PACKAGE: 3 PIN SOT-223

D

b2

E

E1

3

2

1

e

e1

TOP VIEW

b

Gauge Plane

A2

A

L2

c

A1

ø

L

Seating Plane

FRONT VIEW

3 Pin SOT-223

JEDEC TO-261

Variation AA

Inches

Conversion Factor:

1 Inch = 25.40 mm

Millimeters

Controlling Dimension

SYMBOL

MIN

-

NOM

-

1.60

0.76

3.00

0.30

6.50

7.00

MAX

MIN

-

NOM

-

0.063

0.030

0.118

0.012

0.256

0.276

MAX

0.071

0.004

0.067

0.033

0.122

0.014

0.264

0.287

0.146

A

A1

A2

b

b2

c

D

E

E1

e

e1

L

1.80

0.10

1.70

0.84

3.10

0.35

6.70

7.30

3.70

0.02

1.50

0.66

2.90

0.23

6.30

6.70

3.30

0.001

0.060

0.026

0.114

0.010

0.248

0.264

0.130

3.50

0.138

2.30 BASIC

4.60 BASIC

-

0.25 BASIC

-

0.091 BASIC

0.182 BASIC

-

0.010 BASIC

-

0.75

0º

-

0.030

0º

-

L2

ø

10º

SIPEX Pkg Signoff Date/Rev:

JL Aug8-05/Rev A

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

10

PACKAGE: 8 PIN NSOIC

D

D/2

SIDE VIEW

A2

7

8

5

6

A

E/2

E1/2

A1

Seating Plane

E

E1

4

2

3

1

(L1)

Pin1 Designator

to be within this

INDEX AREA

(D/2 x E1/2)

e

b

TOP VIEW

h

ø1

FRONT VIEW

Gauge Plane

ø2

h

R1

R

L2

ø1

c

Seating

Plane

ø

L

8 Pin NSOIC

JEDEC MS-012

Variation AA

Dimensions in Inches

Conversion Factor:

1 Inch = 25.40 mm

Dimensions in Millimeters:

Controlling Dimension

SYMBOL

MIN

NOM

MAX

MIN

NOM

MAX

A

1.35

0.10

1.25

0.31

0.17

-

1.75

0.25

1.65

0.51

0.25

0.053

0.004

0.049

0.012

0.007

-

0.069

0.010

0.065

0.020

0.010

A1

A2

b

-

c

-

E

6.00 BSC

3.90 BSC

1.27 BSC

0.236 BSC

E1

e

0.154 BSC

0.050 BSC

h

0.25

0.40

0.50

1.27

0.010

0.016

-

0.020

0.050

L

-

L1

L2

R

1.04 REF

0.041 REF

0.25 BSC

0.010 BSC

0.07

0º

-

0.003

0º

-

R1

ø

-

8º

15º

-

8º

15º

-

ø1

ø2

5º

-

5º

-

0º

-

0º

-

D

4.90 BSC

0.193 BSC

SIPEX Pkg Signoff Date/Rev:

JL Aug16-05 / Rev A

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

11

ORDERING INFORMATION

Ordering No.

SPX2945M3-3-3

SPX2945M3-3-3/TR

SPX2945M3-5-0

SPX2945M3-5-0/TR

SPX2945S-3-3

Accuracy

1%

Output Voltage

Packages

3-Pin SOT-223

8-Pin NSOIC

3-Pin TO-252

3-Pin TO-263

5-Pin TO-263

3-Pin TO-220

3.3V

5.0V

3.3V

5.0V

3.3V

5.0V

3.3V

5.0V

3.3V

5.0V

3.3V

5.0V

SPX2945S-3-3/TR

SPX2945S-5-0

SPX2945S-5-0/TR

SPX2945R-3-3

SPX2945R-3-3/TR

SPX2945R-5-0

SPX2945R-5-0/TR

SPX2945T-3-3

SPX2945T-3-3/TR

SPX2945T-5-0

SPX2945T-5-0/TR

SPX2945T5-3-3

SPX2945T5-3-3/TR

SPX2945T5-5-0

SPX2945T5-5-0/TR

SPX2945U-3-3

SPX2945U-5-0

Available in lead free packaging. To order add "-L" suffix to part number.

Example: SPX2954S-5-0/TR = standard; SPX2954S-L-5-0/TR = lead free

/TR = Tape and Reel

Pack quantity is 500 for TO-263, 2,000 for TO-252, and 2,500 for SOT223 or NSOIC.

Sipex Corporation

Headquarters and

Sales Office

233 South Hillview Drive

Milpitas, CA 95035

TEL: (408) 934-7500

Solved By SipexTM

FAX: (408) 935-7600

Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the

application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.

Date: 3/14/06

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

12


型号：	SPX2945S-5-0
厂家：	SIPEX CORPORATION
描述：	400mA Low Dropout Voltage Regulator with Shutdown 400毫安低压差稳压器，带有关断稳压器
文件：	总12页 (文件大小：236K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SPX2945S-5-0 [SIPEX]

相关型号：

SPX2945S-5-0TR

SPX2945S-5.0

SPX2945S-5.0/TR

SPX2945S-L-3-3

SPX2945S-L-3-3/TR

SPX2945S-L-3.3/TR

SPX2945S-L-5-0

SPX2945S-L-5-0/TR

SPX2945S-L-5.0

SPX2945S-L-5.0/TR

SPX2945T-3-3

SPX2945T-3-3/TR