A8178LLT-TL [ALLEGRO]
Analog Circuit;
| 型号： | A8178LLT-TL |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Analog Circuit |
| 文件： | 总10页 (文件大小：148K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
The SI-3033LSA is designed to meet the requirement for increased
integration and reliability in low-voltage, high-current, linear regulator
applications such as personnel computers (PCs) and set-top boxes.
Each device incorporates a monolithic low-level reference and control
circuit with a high-current pnp transistor in a power multi-chip module
(PMCM™). Regulated output voltages of 1.8 V or 2.5 V are also
available.
IN
1
2
3
4
8
7
6
5
OUT
OUT
GND
GND
INTERNAL
CONNECTION
IC
VR
SUB
SUPPLY
ENABLE
VS
The high-current pass element provides a low dropout voltage with
output current to 1 A. Regulator accuracy of ±2 % and excellent
temperature characteristics are provided. The logic-compatible
ENABLE input gives the designer complete control over power up,
power down, and standby or sleep.
Dwg. PK-012
These devices are supplied in a fully molded 8-lead miniature
surface-mount package (tape and reel) with enhanced power-dissipating
qualities. They are rated for continuous operation between -30°C and
+100°C.
ABSOLUTE MAXIMUM RATINGS
FEATURES
Input Voltage, VI ................................ 16 V
Supply Voltage, VS ............................ 16 V
Continuous Output Current, IO ........ 1.0 A*
Logic Input Voltage, VE ......................... VS
■ 1 A Output Current
■ Low Dropout voltage
■ LSTTL/CMOS-Compatible On/Off Control
Less Than 1 µA “Sleep” Current
■ Internal Foldback Overcurrent Limiting
■ Internal Thermal Shutdown
■ Surface-Mount Package
Package Power Dissipation,
PD ........................................ See Graph
Output Junction Temperature,
TJ ............................................ +150°C†
Operating Temperature Range,
TA ............................... -30°C to +100°C
Storage Temperature Range,
Tstg ............................. -30°C to +150°C
* Output current rating may be limited by duty
cycle, ambient temperature, and heat sinking.
Under any set of conditions, do not exceed the
specified current rating or a junction temperature
of 150˚C.
† Fault conditions that produce excessive
junction temperature will activate the device’s
thermal shutdown circuitry. These conditions
can be tolerated but should be avoided.
Always order by complete part number: SI-3033LSA-TL ,
where “-TL” indicates tape and reel.
TM
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
FUNCTIONAL BLOCK DIAGRAM
INPUT
1
INTERNAL
CONNECTION
OUTPUT
OUTPUT
2
8
7
SUPPLY
3
SUB
+
ENABLE
4
GROUND
GROUND
5
6
Dwg. FK-019
1.5
Leads 7 and 8 are soldered to
the copper area and provide
heat sinking of the pass transis-
tor.
56.5 mm x 56.5 mm
COPPER AREA ON
GLASS-EPOXY BOARD
1.0
40 mm x 40 mm
COPPER AREA ON
GLASS-EPOXY BOARD
28 mm x 28 mm
COPPER AREA ON
GLASS-EPOXY BOARD
0.5
RECOMMENDED OPERATING CONDITIONS
20 mm x 20 mm
COPPER AREA ON
GLASS-EPOXY BOARD
Max. Input Voltage, VI ................................................ 5.2 V
Output Current, IO .......................................... 0 A to 1.0 A
Output Junction Temperature Range, TJ -20 °C to +125°C
Ambient Temperature Range, TA .............. -30°C to +85°C
0
0
20
40
60
80
100
120
140
AMBIENT TEMPERATURE in °C
Dwg. GK-010-1
TM
115 Northeast Cutoff, Box 15036
2
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2001 Allegro MicroSystems, Inc.
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
ELECTRICAL CHARACTERISTICS at TA = +25°C, VI = VS = 5.0 V, VE = 2.0 V (unless otherwise
noted).
Limits
Characteristic
Symbol
VO
Test Conditions
Min.
Typ.
Max.
3.366
0.5
Units
V
Output Voltage
IO = 500 mA
3.234
3.300
VOQ
VE = 0 V, Output Off
V
Output Volt. Temp. Coeff.
Overcurrent Limit
Line Regulation
aVO
IO = 5 mA, 0°C ≤ TJ ≤ 100°C
VO = 95% of VO at IO = 500 mA
4.5 V ≤ VI = VS ≤ 5.5 V, IO = 300 mA
0 ≤ IO ≤ 1 A
±0.3
1.5
3.0
10
mV/°C
A
IOM
1.2
∆VO(∆VI)
∆VO(∆IO)
VImin - VO
10
20
mV
mV
mV
mV
mA
µA
Load Regulation
Dropout Voltage
I
I
O ≤ 0.5 A
O ≤1 A
220
350
1.7
400
800
2.5
1.0
Ground Terminal Current
IGND
IQ
IO = 0 mA
VE = 0 V, IO = 0 mA
100 Hz ≤ f ≤ 120 Hz
Output On
Rejection Ratio
PSRR
VEH
VEL
IEH
55
dB
ENABLE Input Voltage
2.0
V
Output Off
0.8
80
V
ENABLE Input Current
VE = 2 V, Output On
VE = 0 V, Output Off
30
0
µA
IEL
-5.0
µA
Thermal Shutdown Temp.
Thermal Resistance
TJ
135
150
36
°C
RθJL
To terminals 7 and 8
°C/W
Typical values are at TA = +25°C and are given for circuit design information only.
www.allegromicro.com
3
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
TYPICAL CHARACTERISTICS at TA = 25°C
Dropout voltage
Load regulation
3.36
3.34
0.6
0.5
0.4
0.3
3.32
3.30
VI
VI
VI
= V
= V
= V
S
S
S
= 8 V
0.2
0.1
0
3.28
3.26
3.24
= 5 V
= 4.3 V
0
0.2
0.4
0.6
0.8
1.0
1.2
0
0.2
0.4
0.6
0.8
1.0
1.2
OUTPUT CURRENT in AMPERES
OUTPUT CURRENT in AMPERES
Dwg. GK-026-2
Dwg. GK-025-1
Overcurrent protection
VOUT vs VIN
4.0
3.0
2.0
4.0
I
O
= 0 A
= 0.5 A
= 1 A
VI = VS = 4.3 V
3.0
I
O
V
I
= V
S
S
= 5 V
= 6 V
IO
VI
= V
2.0
1.0
0
1.0
0
0
1.0
2.0
3.0
4.0
5.0
0
0.5
1.0
1.5
2.0
INPUT VOLTAGE
OUTPUT CURRENT in AMPERES
Dwg. GK-028-2
Dwg. GK-027-2
TM
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
4
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
TYPICAL CHARACTERISTICS at TA = 25°C (cont’d)
Line regulation
GND current
3.38
3.36
20
15
IO
IO
IO
= 1 A
I
O
= 1 A
= 0.5 A
= 0 A
3.34
3.32
= 0.5 A
= 0 A
I
O
IO
10
3.30
3.28
3.26
5.0
0
0
2.0
4.0
6.0
8.0
10
12
0
2.0
4.0
6.0
8.0
10
12
INPUT VOLTAGE
INPUT VOLTAGE
Dwg. GK-029-2
Dwg. GK-030-2
ENABLE input current
60
VI = VS = 3.3 V
IO = 5 mA
50
40
30
20
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
ENABLE VOLTAGE in VOLTS
Dwg. GK-023
www.allegromicro.com
5
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
APPLICATIONS INFORMATION
Thermal shutdown and heat sinking. Thermal protection
circuitry turns off the device should the junction temperature rise
above 135°C. This is intended only to protect the device from
failures due to excessive junction temperatures and should not
imply that high-temperature operation is permitted. Ambient
temperature is affected by air circulation and proximity to other
heat-producing components. Normal operation is resumed when
the junction temperature is reduced. Output terminals 7 and 8
are the lead frame and substrate of the pass transistor and
provide a low thermal-resistance path for heat sinking.
down resistor. If this terminal is not connected (open-circuit
fault), the device output is turned off.
Overcurrent protection. The SI-3033LSA includes an
overcurrent protection circuit, which limits the output current at
start up. It thus cannot be used with
1) a constant-current load,
2) a power supply with positive and negative to a common load
(center-tap type power supply),
3) a series power supply, or
4) a diode or resistor in series with the device ground to raise
the output voltage.
In general, the maximum ambient temperature has the most
effect on determining the heat sinking that is needed to maintain
a safe normal operating junction temperature. The maximum
heat sinking thermal resistance (RθJA) can be calculated as
Input voltage. Including ripple voltage and transients, the
minimum input voltage should be greater than the sum of the
output voltage and the maximum rated dropout voltage; the
maximum input voltage must be less than the absolute maximum
rated input voltage (16 V).
RθJA = (135 – TA) / IO (VI – 3.3)
where TA is the maximum ambient temperature in °C,
IO is the maximum output (load) current in amperes, and
VI is the maximum input voltage in volts.
In most applications, the input voltage (terminal 1, VI) and
the supply voltage (terminal 3, VS) are connected together.
The following graph gives the required copper foil area
(soldered to leads 7 and 8) to provide the required thermal
resistance. Note that more is always better and both sides of the
printed wiring board can be used.
Output capacitor. A 22 µF tantalum electrolytic capacitor is
recommended between the output and ground. Very-low ESR
capacitors should not be used.
ENABLE input. The ENABLE input includes an internal pull-
Input capacitor. A 0.1 µF to 10 µF tantalum capacitor is
recommended between the input and ground to prevent oscilla-
tion.
2000
GLASS-EPOXY
PRINTED WIRING BOARD
1000
500
300
200
100
90
100
110
120
130
JUNCTION-TO-AMBIENT THERMAL RESISTANCE in °C/W
Dwg. GK-031
TM
115 Northeast Cutoff, Box 15036
6
Worcester, Massachusetts 01615-0036 (508) 853-5000
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
Dimensions in Millimeters
(controlling dimensions)
8
7
6
5
0.25
0.10
4.4
6.2
±0.2
±0.3
0.5
±0.1
0.4
1
1.27
0° TO 10°
±0.1
BSC
5.1
±0.4
1.55
±0.15
0.10 MAX.
Dwg. MK-006-8 mm
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Lead spacing tolerance is non-cumulative.
3. Leads 7 and 8 are internally connected together and provide heat sinking of the pass transistor.
www.allegromicro.com
7
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
Tape and Reel Dimensions in Millimeters
(controlling dimensions)
0.3
2.5
CENTER LINES
OF CAVITY
0.7
8.0
COVER TAPE
USER DIRECTION OF UNREELING
Dwg. MA-015-1
ACCESS
HOLE
15.4 ± 1.0
(MEASURED AT HUB)
2.0
180
13 ± 0.2
60
13.0 ± 0.3
(MEASURED AT HUB)
TAPE SLOT
IN CORE
FOR TAPE
START
Dwg. MA-018-1
TM
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
The products described herein are manufactured in Japan by Sanken Electric Co., Ltd.
for sale by Allegro MicroSystems, Inc.
Sanken and Allegro reserve the right to make, from time to time, such departures from
the detail specifications as may be required to permit improvements in the performance,
reliability, or manufacturability of its products. Therefore, the user is cautioned to verify
that the information in this publication is current before placing any order.
When using the products described herein, the applicability and suitability of such
products for the intended purpose shall be reviewed at the users responsibility.
Although Sanken undertakes to enhance the quality and reliability of its products, the
occurrence of failure and defect of semiconductor products at a certain rate is inevitable.
Users of Sanken products are requested to take, at their own risk, preventative
measures including safety design of the equipment or systems against any possible injury,
death, fires or damages to society due to device failure or malfunction.
Sanken products listed in this publication are designed and intended for use as
components in general-purpose electronic equipment or apparatus (home appliances,
office equipment, telecommunication equipment, measuring equipment, etc.). Their use
in any application requiring radiation hardness assurance (e.g., aerospace equipment) is
not supported.
When considering the use of Sanken products in applications where higher reliability
is required (transportation equipment and its control systems or equipment, fire- or
burglar-alarm systems, various safety devices, etc.), contact a Sanken sales representa-
tive to discuss and obtain written confirmation of your specifications.
The use of Sanken products without the written consent of Sanken in applications
where extremely high reliability is required (aerospace equipment, nuclear power-control
stations, life-support systems, etc.) is strictly prohibited.
The information included herein is believed to be accurate and reliable. Application
and operation examples described in this publication are given for reference only and
Sanken and Allegro assume no responsibility for any infringement of industrial property
rights, intellectual property rights, or any other rights of Sanken or Allegro or any third
party that may result from its use.
www.allegromicro.com
9
SI-3033LSA
LOW-VOLTAGE, HIGH-CURRENT
3.3 V LINEAR REGULATOR
LINEAR REGULATORS
IN ORDER OF 1) OUTPUT VOLTAGE AND 2) OUTPUT CURRENT
Part
VO
1.8 V
2.5 V
3.3 V
3.3 V
5.0 V
5.0 V *
5.0 V
5.0 V
5.0 V
7.7 V
9.0 V
9.0 V *
9.0 V
9.0 V
12 V
Max IO
1.0 A
1.0 A
1.0 A
1.5 A
1.0 A
1.5 A
1.5 A
1.5 A
2.0 A
15 mA
1.0 A
1.5 A
1.5 A
1.5 A
1.0 A
1.5 A
1.5 A
1.5 A
2.0 A
1.0 A
1.5 A
1.5 A
2.0 A
1.0 A
1.5 A
1.5 A
Max DC In
16 V
16 V
16 V
20 V
25 V
35 V
35 V
35 V
25 V
30 V
30 V
35 V
35 V
35 V
30 V
35 V
35 V
35 V
30 V
35 V
35 V
35 V
30 V
35 V
45 V
45 V
Max. Dropout Voltage
1.2 V @ 1.0 A
Number
SI-3018LSA
SI-3025LSA
SI-3033LSA
SI-3033C
SI-3050N
SLA3001M
SI-3050C
SI-3051N
SI-3052V
A8178LLT
SI-3090N
SLA3001M
SI-3090C
SI-3091N
SI-3120N
SLA3001M
SI-3120C
SI-3121N
SI-3122V
SI-3150N
SI-3150C
SI-3151N
SI-3152V
SLA3002M
SI-3240C
SI-3241N
Package
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
5-Lead TO-220
TO-220
800 mV @ 1.0 A
800 mV @ 1.0 A
500 mV @ 1.0 A
500 mV @ 0.5 A
1.0 V @ 1.5 A
Power-Tab SIP
5-Lead TO-220
TO-220
500 mV @ 1.0 A
500 mV @ 1.0 A
500 mV @ 1.0 A
—
TO-3P
SOT-89
500 mV @ 0.5 A
1.0 V @ 1.5 A
TO-220
Power-Tab SIP
5-Lead TO-220
TO-220
500 mV @ 1.0 A
500 mV @ 1.0 A
500 mV @ 0.5 A
1.0 V @ 1.5 A
TO-220
12 V *
12 V
Power-Tab SIP
5-Lead TO-220
TO-220
500 mV @ 1.0 A
500 mV @ 1.0 A
500 mV @ 1.0 A
500 mV @ 0.5 A
500 mV @ 1.0 A
500 mV @ 1.0 A
500 mV @ 1.0 A
1.0 V @ 1.0 A
12 V
12 V
TO-3P
15 V
TO-220
15 V
5-Lead TO-220
TO-220
15 V
15 V
TO-3P
15.7 V
24 V
Power-Tab SIP
5-Lead TO-220
TO-220
500 mV @ 1.0 A
500 mV @ 1.0 A
24 V
* Three outputs, one each at 5 V, 9 V, and 12 V.
† Also includes two switching regulator outputs for 5 V at 500 mA and 9 V at 400 mA.
Also, see 83145 and 84145 Latched, Universal Input-Voltage Switches.
TM
115 Northeast Cutoff, Box 15036
10
Worcester, Massachusetts 01615-0036 (508) 853-5000
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