SI-3002KWD [ALLEGRO]
1 A, Low-Dropout, Dual Output, 2.5 V & 3.3 V Regulator; 1 A，低压差，双路输出， 2.5 V和3.3 V稳压器
| 型号： | SI-3002KWD |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | 1 A, Low-Dropout, Dual Output, 2.5 V & 3.3 V Regulator |
| 文件： | 总9页 (文件大小：441K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SI-3002KWD
1 A, Low-Dropout, Dual Output, 2.5 V & 3.3 V Regulator
Designed to meet the high-current requirements in industrial and
consumer applications; embedded core, memory, or logic supplies; TVs,
VCRs, and office equipment, the SI-3002KWD voltage regulator offers
the reduced dropout voltage and low quiescent current essential for
improved efficiency. This device delivers dual regulated outputs at up to
1 A. Integrated thermal and overcurrent protection enhance overall
system reliability. Devices with other output voltages are also available.
Quiescent current does not increase significantly as the dropout
voltage is approached, an ideal feature in standby/resume power systems
where data integrity is crucial. Regulator accuracy and excellent
temperature characteristics are provided by a bandgap reference. An
LS-TTL/CMOS-compatible input gives the designer complete control
over power up, standby, or power down. A pnp pass element provides a
dropout voltage of less than 600 mV at 1 A of load current. Low output
voltages eliminate the need for expensive PWM buck converters. The
low dropout voltage permits more efficient regulation before output
regulation is lost.
This device is supplied in a 5-lead surface-mount plastic package
(TO-263) with ground tab to provide a low-resistance path for maximum
heat dissipation.
FEATURES
■ 1 A Output Current per Channel
■ 0.6 V Maximum Dropout Voltage at IO = 1 A
■ Fast Transient Response
■ 1.5 mA Maximum Standby Current
■ Foldback Current Limiting
■ Ground Tab for Superior Heat Dissipation
■ ThermalProtection
ABSOLUTE MAXIMUM RATINGS
Input Voltage, VI . . . . . . . . . . . . . 18 V
Output Current, IO . . . . . . . . . . . . . 1 A*
Enable Input Voltage, VE . . . . . . . 6.0 V
Junction Temperature, TJ . . . . +125°C
APPLICATIONS
■ TVs, VCRs, Electronic Games
■ Embedded Core, Memory, or Logic Supplies
■ Printers and Other Office Equipment
■ Industrial Machinery
■ Secondary-Side Stabilization of Multi-Output SMPS
Storage Temperature Range,
TS . . . . . . . . . . . . -40°C to +125°C
* Output current rating is limited by input
voltage, duty cycle, and ambient tempera-
ture. Under any set of conditions, do not
exceed a junction temperature of +125°C.
Always order by complete part number, e.g., SI-3002KWD-TL ,
where “-TL” indicates tape and reel.
Sanken Power Devices
from Allegro MicroSystems
SI-3002KWD
1 A, Low-Dropout,
Dual Output,
2.5 V & 3.3 V Regulator
FUNCTIONAL BLOCK DIAGRAM
Allowable Package Power Dissipation
Recommended Operating Conditions
Min
0
Max Units
DC Output Current
1
A
Operating Ambient Temp.
Operating Junction Temp.
-30
-20
+85
+100
°C
°C
This data sheet is based on Sanken data sheet SSJ-02008.
115NortheastCutoff, Box15036
Worcester,Massachusetts01615-0036
2
Copyright©2004AllegroMicroSystems,Inc.
SI-3002KWD
1 A, Low-Dropout,
Dual Output,
2.5 V & 3.3 V Regulator
ELECTRICAL CHARACTERISTICS at TA = +25°C, VE = 2 V (unless otherwise noted).
Limits
Characteristic
Channel 1
Symbol Test Conditions
Min.
Typ. Max.
Units
Output Voltage
VO1
VO1(off)
aVO1
IOM1
VI = 5.0 V, IO1 = 10 mA
3.234 3.300 3.366
V
V
VE = 0 V
—
—
1.2
—
—
—
—
—
±0.3
—
0.5
—
Output Volt. Temp. Coeff.
Output Short-Circuit Current
Line Regulation
0°C ≤ TJ ≤ 100°C
VI = 5.0 V, See note
mV/°C
A
—
∆VO(∆VI)1 VI = 4.5 V ~ 10 V, IO1 = 10 mA
∆VO(∆IO)1 VI = 5.0 V, IO1 = 0 A ~ 1.0 A
VImin - VO1 IO1 = 1.0 A
—
20
30
0.6
—
mV
mV
V
Load Regulation
—
Dropout Voltage
—
Ripple Rejection Ratio
Channel 2
PSRR
VI = 5.0 V, 100 Hz ≤ f ≤ 120 Hz
60
dB
Output Voltage
VO2
VO2(off)
aVO2
IOM2
VI = 5.0 V, IO2 = 10 mA
VE = 0 V
2.450 2.500 2.550
V
V
—
—
1.2
—
—
—
—
—
±0.3
—
0.5
—
Output Volt. Temp. Coeff.
Output Short-Circuit Current
Line Regulation
0°C ≤ TJ ≤ 100°C
VI = 5.0 V, See note
mV/°C
A
—
∆VO(∆VI)2 VI = 4.5 V ~ 10 V, IO2 = 10 mA
∆VO(∆IO)2 VI = 5.0 V, IO2 = 0 A ~ 1.0 A
VImin - VO2 IO2 = 1.0 A
—
20
30
0.6
—
mV
mV
V
Load Regulation
—
Dropout Voltage
—
Ripple Rejection Ratio
Logic
PSRR
VI = 5.0 V, 100 Hz ≤ f ≤ 120 Hz
60
dB
Ground Terminal Current
IGND
VI = 5.0 V, IO = 0 mA, VE = 2.0 V
VI = 5.0 V, VE = 0 V
Output ON
—
—
1.0
—
1.5
0.5
—
mA
mA
V
Enable Input Voltage
Enable Input Current
Thermal Shutdown
VEH
VEL
IEH
IEL
2.0
—
—
Output OFF
—
0.8
5.0
-100
—
V
VE = 2.7 V
—
0
µA
µA
°C
VE = 0.4 V
—
-12
150
TJ
IO = 10 mA
135
Typical values are given for circuit design information only.
Note: Output short-circuit current is at point where output voltage has decreased 5%.
www.allegromicro.com
3
SI-3002KWD
1 A, Low-Dropout,
Dual Output,
2.5 V & 3.3 V Regulator
TYPICAL CHARACTERISTICS
(VI = 5.0 V, TA = 25°C)
ꢀ
Chan. 1 Low-Voltage Behavior
ꢀ
Chan. 1 Overcurrent Protection
ꢀ Chan. 1 Dropout Voltage
ꢀ Chan. 1 Line Regulation
ꢀ Chan. 1 Load Regulation
ꢀ Chan. 1 Transient Response
115NortheastCutoff, Box15036
Worcester,Massachusetts01615-0036
4
SI-3002KWD
1 A, Low-Dropout,
Dual Output,
2.5 V & 3.3 V Regulator
TYPICAL CHARACTERISTICS (cont.)
(VI = 5.0 V, TA = 25°C)
ꢀ
Chan. 2 Low-Voltage Behavior
ꢀ
Chan. 2 Overcurrent Protection
ꢀ Chan. 2 Line Regulation
ꢀ Chan. 2 Load Regulation
ꢀ Chan. 2 Transient Response
ꢀ ENABLE Control Voltage
ꢀ ENABLE Control Current
ꢀ Thermal Protection
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5
SI-3002KWD
1 A, Low-Dropout,
Dual Output,
2.5 V & 3.3 V Regulator
APPLICATIONS INFORMATION
Input Capacitor (CI, 0.1 10 µF). This is necessary
either when the input line includes inductance or when the
wiring is long.
Heat Radiation and Reliability. The reliability of the
IC is directly related to the junction temperature (TJ) in its
operation. Accordingly, careful consideration should be
given to heat dissipation.
Output Capacitor (CO, >22 µF). This device is not
designed for a use with a very low ESR output capacitor
such as a ceramic capacitor. Output oscillation may occur
with that kind of capacitor.
The inner frame on which the integrated circuit is mounted
is connected to the GND terminal (pin 3). Therefore, it is
very effective for heat radiation to enlarge the copper area
that is connected to the GND terminal. The graph illus-
trates the effect of the copper area on the junction-to-
ambient thermal resistance (RθJA).
ENABLE Input. The ENABLE (control) input features
an internal pull-up resistor. Leaving this input open causes
the output to turn on.
The junction temperature (TJ) can be determined from
either of the following equations:
Parallel Operation. Parallel operation to increase load
current is not permitted.
TJ = (PD × RθJA) + TA
or
Determination of DC Input Voltage. The minimum
input voltage VI(min) should be higher than the sum of the
fixed output voltage and the maximum rated dropout
voltage.
TJ = (PD × RθJT) + TT
where PD = IO1(VI – VO1) + IO2(VI – VO2) and
RθJT = 3°C/W.
Overcurrent Protection. The SI-3000KWD series has
a built-in fold-back type overcurrent protection circuit,
which limits the output current at a start-up mode. It thus
cannot be used in applications that require current at the
start-up mode such as:
(1) constant-current load,
(2) power supply with positive and negative outputs to
common load (a center-tap type power supply), or
(3) raising the output voltage by putting a diode or a
resistor between the device ground and system ground.
Thermal Protection. Circuitry turns off the pass
transistor when the junction temperature rises above 135°C.
It is intended only to protect the device from failures due to
excessive junction temperatures and should not imply that
output short circuits or continuous overloads are permitted.
115NortheastCutoff, Box15036
Worcester,Massachusetts01615-0036
6
SI-3002KWD
1 A, Low-Dropout,
Dual Output,
2.5 V & 3.3 V Regulator
Dimensions in Millimeters
Tab Temperature
(TT) Measured Here
Recommended Land Pattern
Notes:
1. Dimensions do not include mold protrusions.
2. ( ) Is reference.
3. [ ] Is assembly out quality.
4. Heat sink side flash: 0.8 mm max.
5. Terminal finish: pure Sn (category e3)
6. Product weight: approximately 1.48 g
www.allegromicro.com
7
SI-3002KWD
1 A, Low-Dropout,
Dual Output,
2.5 V & 3.3 V Regulator
Tape and Reel Dimensions in Millimeters
Tape Specifications
1. Material: conductive polystyrene.
2. Allowable camber: 1 mm/100 mm maximum.
3. A0 (10.6 mm) and B0 (15.7 mm) measured on a plane
0.3 mm above the bottom of the pocket.
4. K0 (4.9 mm) is measured from a plane on the inside
bottom of the pocket to the surface of the carrier.
5. Ten pitches cumulative tolerance on tape ±0.2 mm.
6. The space between parts and cavity must not exceed
±0.3 mm from its normal position in any direction.
7. Surface resistivity of embossment: 107 ohm/cm2 max.
8. K1 = 3.9 mm.
115NortheastCutoff, Box15036
Worcester,Massachusetts01615-0036
8
SI-3002KWD
1 A, Low-Dropout,
Dual Output,
2.5 V & 3.3 V 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 company sales representative 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 publica-
tion 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
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