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PDF A1205 Data sheet ( Hoja de datos )
| Número de pieza | A1205 | |
| Descripción | Continuous-Time Bipolar Switch | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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A1205
Continuous-Time Bipolar Switch
Features and Benefits
▪ Ideal for applications that require pulsing VCC to
conserve power
▪ Continuous-time operation
▫ Fast power-on time
▫ Low noise
▪ Stable operation over full operating temperature range
▪ Reverse battery protection
▪ Solid-state reliability
▪ Factory-programmed at end-of-line for optimum
performance
▪ Robust EMC performance
▪ High ESD rating
▪ Regulator stability without a bypass capacitor
Packages:
Description
The Allegro® A1205 Hall-effect bipolar switch is a next-
generation replacement and extension of the popular Allegro
A3134 bipolar switch. The A1205 has identical specifications
as the A1201 but is recommended for applications that require
pulsing VCC to conserve power. For standard applications,
where VCC is constant, please refer to the A1201 through
A1204 devices.
Overall, theA120x family, produced with BiCMOS technology,
consists of continuous-time devices that feature fast power-
on time and low-noise operation. Device programming is
performed after packaging to ensure increased switchpoint
accuracy by eliminating offsets that can be induced by
package stress. Unique Hall element geometries and low-
offset amplifiers help to minimize noise and to reduce the
residual offset voltage normally caused by device overmolding,
temperature excursions, and thermal stress.
TheA120x Hall-effect bipolar switches include the following on
a single silicon chip: voltage regulator, Hall-voltage generator,
3 pin SOT23W (LH)
www.DataSheet4U.com
Not to scale
3 pin SIP (UA)
Continued on the next page…
Functional Block Diagram
VCC
A1205-DS, Rev. 1
Regulator
To all subcircuits
Amp
Gain
Offset
Trim
Control
VOUT
GND
1 page  
A1205
Continuous-Time Bipolar Switch
Characteristic Data
Supply Current (On) versus Ambient Temperature
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
–50
VCC (V)
24
3.8
0 50 100 150
TA (°C)
Supply Current (Off) versus Ambient Temperature
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
–50
VCC (V)
24
3.8
0 50 100 150
TA (°C)
Output Voltage (On) versus Ambient Temperature
350 ILOAD = 20 mA
300
250
VCC (V)
200
24
150 3.8
100
50
0
–50
0 50 100
TA (°C)
150
Supply Current (On) versus Supply Voltage
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
0
TA (°C)
–40
25
150
5 10 15 20 25
VCC (V)
Supply Current (Off) versus Supply Voltage
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
0
TA (°C)
–40
25
150
5 10 15 20 25
VCC (V)
Output Voltage (On) versus Supply Voltage
ILOAD = 20 mA
350
300
250
TA (°C)
200 –40
150
25
150
100
50
0
0 5 10 15 20 25
VCC (V)
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
5 Page 
A1205
Continuous-Time Bipolar Switch
Package LH, 3-Pin (SOT-23W)
3.00 .118
2.70 .106
0.15 [.006] M C A B
3.04 .120
2.80 .110
A
1.49 .059
3 A NOM
B
B
Preliminary dimensions, for reference only
Dimensions in millimeters
U.S. Customary dimensions (in.) in brackets, for reference only
(reference JEDEC TO-236 AB, except case width and terminal tip-to-tip)
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A Hall element (not to scale)
B Active Area Depth 0.28 [.011]
1
3X
0.10 [.004] C
3X
0.50
0.30
.020
.012
0.20 [.008] M C A B
0.95 .037
A
2
1.90 .075
2.10 .083
1.85 .073
0.96 .038
A NOM
SEATING C
PLANE
1.17 .046
0.75 .030
0.15 .006
0.00 .000
8º
0º
0.20 .008
0.08 .003
0.60 .024
0.25 .010
0.25 .010
SEATING PLANE
GAUGE PLANE
Allegro MicroSystems, Inc.
11
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet A1205.PDF ] | |
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