SI-3011ZD [ALLEGRO]

High-Current, Low-Dropoiut, 1.1~5 V Regulator; 大电流，低Dropoiut ， 1.1 〜 5 V稳压器


型号：	SI-3011ZD
厂家：	ALLEGRO MICROSYSTEMS
描述：	High-Current, Low-Dropoiut, 1.1~5 V Regulator 大电流，低Dropoiut ， 1.1 〜 5 V稳压器线性稳压器IC 调节器电源电路输出元件
文件：	总9页 (文件大小：402K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SI-3011ZD

High-Current, Low-Dropout, 1.1~5 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-3011ZD voltage regulator offers the

reduced dropout voltage and low quiescent current essential for im-

proved 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 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 600 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 5-lead surface-mount plastic package

(TO-263) with ground tab to provide a low-resistance path for maximum

heat dissipation. A similar device in a flange-mounted (TO-220-style)

high-power package is the SI-3011ZF.

FEATURES

■ 3 A Output Current

■ Adjustable 1.1~ 5 V Output Voltage

■ 0.6 V Maximum Dropout Voltage at I_O= 3 A

■ Fast Transient Response

■ 1 µA Maximum Standby Current

ABSOLUTE MAXIMUM RATINGS

■ RemoteVoltageSensing

■ Foldback Current Limiting

■ Ground Tab for Superior Heat Dissipation

■ ThermalProtection

Input Voltage, V_I. . . . . . . . . . . . . 10 V

Output Current, I_O. . . . . . . . . . . . . 3 A*

Enable Input Voltage, V_E. . . . . . . . 6 V

Junction Temperature, T_J. . . . +125°C

APPLICATIONS

■ TVs, VCRs, Electronic Games

■ Embedded Core, Memory, or Logic Supplies

■ Printers and Other Office Equipment

■ Industrial Machinery

Storage Temperature Range,

T_S. . . . . . . . . . . . -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.

■ Secondary-Side Stabilization of Multi-Output SMPS

Always order by complete part number, e.g., SI-3011ZD-TL ,

where “-TL” indicates tape and reel.

Sanken Power Devices

from Allegro MicroSystems

SI-3011ZD

High-Current,

Low-Dropout,

1.1~5 V Regulator

FUNCTIONAL BLOCK DIAGRAM

Allowable Package Power Dissipation

Recommended Operating Conditions

Min

—

Max Units

DC Input Voltage

DC Output Current

Adjustable Voltage Range

Operating Junction Temp.

1.2

-20

+100

°C

This data sheet is based on Sanken data sheet SSJ-02059E

115NortheastCutoff, Box15036

Worcester,Massachusetts01615-0036

SI-3011ZD

High-Current,

Low-Dropout,

1.1~5 V Regulator

ELECTRICAL CHARACTERISTICS at T_A= +25°C, V_O= 2.5 V adjusted, V_E= 2 V (unless otherwise noted).

Limits

Characteristic

Symbol Test Conditions

Min.

—

Typ. Max.

Units

Output Voltage

V_O

V_O(off)

a_VO

V_I= V_O(nom)+ 1 V, I_O= 10 mA

V_O(nom)

—

0.5

—

V_E= 0 V

—

Output Volt. Temp. Coeff.

Internal Reference Voltage

Output Short-Circuit Current

Line Regulation

0°C ≤ T_J≤ 100°C

—

±0.3

mV/°C

V_ref

V_I= V_O(nom)+ 1 V, I_O= 10 mA

V_I= V_O(nom)+ 1 V, see note

V_I= 3.0 ~ 5.0 V, I_O= 10 mA

V_I= 3.3 V, I_O= 0 A ~ 3.0 A

I_O= 3.0 A

1.078 1.100 1.122

I_OM

3.2

—

1.0

—

∆V_O(∆VI)

∆V_O(∆IO)

V_Imin- V_O

I_GND

Load Regulation

—

Dropout Voltage

—

0.6

1.5

1.0

—

Ground Terminal Current

V_I= V_O(nom)+ 1 V, I_O= 0 mA, V_E= 2.0 V

V_I= V_O(nom)+ 1 V, V_E= 0 V

Output ON

—

µA

—

Enable Input Voltage

Enable Input Current

V_EH

V_EL

I_EH

2.0

—

Output OFF

0.8

100

-5.0

—

V_E= 2.7 V

—

µA

°C

I_EL

V_E= 0 V

—

Ripple Rejection Ratio

Thermal Shutdown

PSRR

T_J

V_I= V_O(nom)+ 1 V, 100 Hz ≤ f ≤ 120 Hz

—

152

135

—

Typical values are given for circuit design information only.

Note: Output short-circuit current is at point where output voltage has decreased 5% below V_O(nom)

www.allegromicro.com

SI-3011ZD

High-Current,

Low-Dropout,

1.1~5 V Regulator

TYPICAL CHARACTERISTICS

(V_O= 2.5 V adjusted, T_A= 25°C)

ꢀ Dropout Voltage

ꢀ Low-Voltage Behavior

ꢀ GND Pin Current

ꢀ Line Regulation

ꢀ Load Regulation

ꢀ Overcurrent Protection

ꢀ ENABLE Control Voltage

ꢀ ENABLE Control Current

ꢀ Thermal Protection

115NortheastCutoff, Box15036

Worcester,Massachusetts01615-0036

SI-3011ZD

High-Current,

Low-Dropout,

1.1~5 V Regulator

APPLICATIONS INFORMATION

Input Capacitor (C_I, 0.1 µF to 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 (T_J) in its

operation. Accordingly, careful consideration should be

given to heat dissipation.

Output Capacitor (C_O, > 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.

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 (R_θJA).

Output Voltage Adjustable Resistors (R1 and R2).

The output voltage is adjusted by R1 and R2. 10 kΩ or

11 kΩ for R2 is recommended.

R1 = (V_O– V_ref)/(V_ref/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 V_I(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.

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:

The junction temperature (T_J) can be determined from

either of the following equations:

(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.

T_J= (P_D× R_θJA) + T_A

T_J= (P_D× R_θJT) + T_T

where P_D= I_O× (V_I– V_O) and

R_θJT= 3°C/W.

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.

Parallel Operation. Parallel operation to increase load

current is not permitted.

www.allegromicro.com

SI-3011ZD

High-Current,

Low-Dropout,

1.1~5 V Regulator

Dimensions in Millimeters

Tab Temperature

(T_T) 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

115NortheastCutoff, Box15036

Worcester,Massachusetts01615-0036

SI-3011ZD

High-Current,

Low-Dropout,

1.1~5 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: 10⁷ohm/cm²max.

8. K1 = 3.9 mm.

www.allegromicro.com

SI-3011ZD

High-Current,

Low-Dropout,

1.1~5 V Regulator

Shipping Container Dimensions in Millimeters

Inner Box

2 reels per box, 800 pieces per reel

Outer Box

115NortheastCutoff, Box15036

Worcester,Massachusetts01615-0036

SI-3011ZD

High-Current,

Low-Dropout,

1.1~5 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

SI-3011ZD [ALLEGRO]

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