SI-3011ZF Datasheet

SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
Features and Benefits
Description
▪ 3 A Output Current
▪ 0.7 V Maximum Dropout Voltage at IO = 3 A
▪ 1 μA Maximum Standby Current
▪ Adjustable 1.1 to 5 V Output Voltage
▪ Remote Voltage Sensing
▪ Foldback Current Limiting
▪ Thermal Protection
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-3011ZF
voltage regulator offers the reduced dropout voltage and low
quiescent current essential for improved efficiency. This device
delivers a regulated output at up to 3 A. Integrated thermal
and overcurrent protection enhance overall system reliability.
Devices with fixed output voltages of 2.5 V or 3.3 V 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 700 mV at 3 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 fully molded TO-220-style 5-lead
flange-mounted, high power, isolated plastic package. A similar
device in a lower-power surface-mount plastic package is the
SI-3011ZD.
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
Package: 5-pin TO-220
Not to scale
Pin-Out Diagram
SI-3011ZF
1
2
3
4
5
ENABLE
INPUT
GND
OUTPUT
SENSE
VR
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
Selection Guide
Part Number
SI-3011ZF
For the availability of parts meeting –40°C requirements, contact a Sanken Sales Representative.
Absolute Maximum Ratings
Characteristic
Symbol
Input Voltage
VI
Output Current
IO
Enable Input Voltage
VE
Notes
Rating
Units
10
V
3
A
6
V
Output current rating is limited by input voltage, duty cycle, and
ambient temperature. Under any set of conditions, do not exceed
a junction temperature of +125°C.
Junction Temperature
TJ
125
ºC
Storage Temperature
Tstg
–40 to 125
ºC
Recommended Operating Conditions
Characteristic
Symbol
Conditions
Min.
Max.
Unit
DC Input Voltage
VI
–
6
V
DC Output Current
IO
0
3
A
Adjustable Voltage Range
Operating Junction Temperature
VADJ
1.2
5
V
TJ
–20
100
°C
Allowable Package
Power Dissipation
SI-3011ZF
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SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
Functional Block Diagram
SI-3011ZF
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High-Current, Low-Dropout, 1.1 to 5 V Regulator
SI-3011ZF
ELECTRICAL CHARACTERISTICS at TA = 25°C, VO = 2.5 V adjusted, VE = 2V, unless otherwise noted
Characteristics
Output Voltage
Min.
Typ.1
Max.
Unit
VI = VO(nom) + 1 V, IO = 10 mA
–
VO(nom)
–
V
VE = 0 V
–
–
0.5
V
–
±0.3
–
mV/°C
1.078
1.100
1.122
V
3.2
–
–
A
Symbol
VO
VO(off)
Test Conditions
Output Voltage Temperature
Coefficient
aVO
0°C ≤ TJ ≤ 100°C
Internal Reference Voltage
Vref
VI = VO(nom) + 1 V , IO = 10 mA
Output Short-Circuit Current2
IOM
VI = VO(nom) + 1 V
Line Regulation
∆VO(∆VI)
VI = 3.0 to 5.0 V, IO = 10 mA
–
–
10
mV
Load Regulation
∆VO(∆IO)
VI = 3.3 V, IO = 0 to 3.0 A
–
–
40
mV
Dropout Voltage
VI(min) –
VO
IO = 3.0 A
–
–
0.7
V
VI = VO(nom) + 1 V, IO = 0 mA, VE = 2.0 V
–
1.0
1.5
mA
VI = VO(nom) + 1 V, VE = 0 V
–
–
1.0
μA
Ground Terminal Current
Enable Input Voltage
Enable Input Current
Ripple Rejection Ratio
Thermal Shutdown
IGND
VEH
Output on
2.0
–
–
V
VEL
Output off
–
–
0.8
V
IEH
VE = 2.7 V
–
–
100
μA
IEL
VE = 0 V
–
0
–5.0
μA
VI = VO(nom) + 1 V, 100 Hz ≤ f ≤ 120 Hz
–
60
–
dB
135
152
–
°C
PSRR
TJ
1Typical
values are given for circuit design information only.
2Output short-circuit current is at the point where output voltage has decreased 5% below V
O(nom).
SI-3011ZF
SANKEN ELECTRIC CO., LTD.
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SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
Typical Characteristics
(VO = 2.5 V adjust, TA = 25°C)
SI-3011ZF
Dropout Voltage
Low-Voltage Behavior
GND Pin Current
Line Regulation
Load Regulation
Overcurrent Protection
ENABLE Control Voltage
ENABLE Control Current
Thermal Protection
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High-Current, Low-Dropout, 1.1 to 5 V Regulator
SI-3011ZF
Input Capacitor (CI , approximately 10 μF). This is necessary
either when the input line includes inductance or when the wiring
is long.
Output Capacitor (CO , > 47 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.
Output Voltage Adjustable Resistors (R1 and R2). The
output voltage is adjusted by R1 and R2. 10 kΩ or
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. The graph on page 2 illustrates the effect of thermal
resistance on the allowable package power dissipation.
The junction temperature ( TJ ) can be determined from either of
the following equations:
TJ = ( PD × RθJA ) + TA
or
11 kΩ for R2 is recommended.
TJ = ( PD × RθJC ) + TC
R1 = ( VO – Vref ) / ( Vref / R2)
For an output voltage of 1.8 V or less, add a 10 kΩ resistor
between ADJ and the junction of R1 and R2.
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. If setting
the output voltage lower than 2.0 V, the minimum input voltage
should be more than 2.4 V.
where
PD = IO × ( VI – VO ) and
RθJC = 5 °C/W.
Parallel Operation. Parallel operation to increase load current
is not permitted.
Overcurrent Protection. The SI-3000ZD 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.
SI-3011ZF
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SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
Dimensions in Millimeters
Terminal Finish: Sn–3Ag–0.5Cu, 2nd level interconnect category (e1)
Product Weight: Approx. 2.3 g
Terminal spacing is measured at lead tips.
SI-3011ZF
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SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
Because reliability can be affected adversely by improper
storage environments and handling methods, please observe
the following cautions.
Cautions for Storage
• Ensure that storage conditions comply with the standard
temperature (5°C to 35°C) and the standard relative
humidity (around 40% to 75%); avoid storage locations
that experience extreme changes in temperature or
humidity.
• Avoid locations where dust or harmful gases are present
and avoid direct sunlight.
• Reinspect for rust on leads and solderability of the
products that have been stored for a long time.
Cautions for Testing and Handling
• When tests are carried out during inspection testing and
other standard test periods, protect the product from
power surges from the testing device, shorts between
adjacent product packages, and shorts to the heatsink.
• The screwing torque for attaching a heatsink shall be
58.8 to 68.6 N•cm (6.0 to 7.0 kgf•cm).
• Ensure there are no foreign objects between the heatsink
and thermal pad; only silicone thermal grease is allowed.
Remarks About Using Silicone Grease with a Heatsink
• When silicone grease is used in mounting this product
with a heatsink, grease shall be applied evenly and thinly.
If more silicone grease than required is applied, it may
produce stress.
• Volatile-type silicone greases may permeate the product
and produce cracks after long periods of time, resulting in
reduced heat radiation effect, and possibly shortening the
lifetime of the product.
• Hard silicone greases may cause cracks in the product
when screwing the product to a heatsink.
SI-3011ZF
•
Our recommended silicone greases for heat radiation
purposes, which will not cause any adverse effect on the
product life, are indicated below:
Type
Suppliers
G746
Shin-Etsu Chemical Co., Ltd.
YG6260
Momentive Performance Materials LLC
SC102
Dow Corning Toray Co., Ltd.
Soldering
• When soldering the products, please be sure to minimize
the working time, within the following limits:
260±5°C 10 s
380±5°C
5s
• Soldering should be at a distance of at least 1.5 mm from
the body of the product.
Electrostatic Discharge
• When handling the products, the operator must be
grounded. Grounded wrist straps worn should have at
least 1 MΩ of resistance from the operator to ground to
prevent shock hazard, and it should be placed near the
operator.
• Workbenches where the products are handled should be
grounded and be provided with conductive table and floor
mats.
• When using measuring equipment such as a curve tracer,
the equipment should be grounded.
• When soldering the products, the head of soldering irons
or the solder bath must be grounded in order to prevent
leak voltages generated by them from being applied to the
product.
• The product should always be stored and transported in
Sanken shipping containers or conductive containers, or
be wrapped in aluminum foil.
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SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
• The contents in this document are subject to changes, for improvement and other purposes, without notice. Make sure that this is the
latest revision of the document before use.
• Application and operation examples described in this document are quoted for the sole purpose of reference for the use of the products herein and Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights or
any other rights of Sanken or any third party which may result from its use.
• 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 the society due to device
failure or malfunction.
• Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.).
When considering the use of Sanken products in the applications where higher reliability is required (transportation equipment and
its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), and whenever
long life expectancy is required even in general purpose electronic equipment or apparatus, please contact your nearest Sanken sales
representative to discuss, prior to the use of the products herein.
The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required
(aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited.
• In the case that you use Sanken products or design your products by using Sanken products, the reliability largely depends on the
degree of derating to be made to the rated values. Derating may be interpreted as a case that an operation range is set by derating the
load from each rated value or surge voltage or noise is considered for derating in order to assure or improve the reliability. In general,
derating factors include electric stresses such as electric voltage, electric current, electric power etc., environmental stresses such
as ambient temperature, humidity etc. and thermal stress caused due to self-heating of semiconductor products. For these stresses,
instantaneous values, maximum values and minimum values must be taken into consideration.
In addition, it should be noted that since power devices or IC's including power devices have large self-heating value, the degree of
derating of junction temperature affects the reliability significantly.
• When using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, chemically
or otherwise processing or treating the products, please duly consider all possible risks that may result from all such uses in advance
and proceed therewith at your own responsibility.
• Anti radioactive ray design is not considered for the products listed herein.
• Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of Sanken's distribution network.
• The contents in this document must not be transcribed or copied without Sanken's written consent.
SI-3011ZF
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