AS1115U-3.3 [ETC]

Analog IC ; 模拟IC\n


型号：	AS1115U-3.3
厂家：	ETC
描述：	Analog IC 模拟IC\n 模拟IC
文件：	总4页 (文件大小：100K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AS1115

600mA Low Dropout NPN Voltage Regulator

FEATURES

APPLICATIONS

• Guaranteed 600mA Output

• Portable/ Palm Top / Notebook Computers

• Three Terminal Adjustable Or Fixed 1.5V, 2.5V, 3V, 3.3V & 5V

• Very Low Quiescent Current

• Battery Chargers

• Disk Drives

• Portable Consumer Equipment

• Portable Instrumentation

• SMPS Post-Regulator

• Low Dropout Voltage Of 1.2 Volts At Full Load

• Extremely Tight Load And Line Regulation

• Very Low Temperature Coefficient

• Logic-Controlled Electronic Shutdown

• Internal Overcurrent Limiting & Thermal Overload Protection

• Surface Mount Package SOT-223, TO-263, TO-252 , TO-220 & SO-8

PRODUCT DESCRIPTION

The AS1115 is a low power positive-voltage regulator designed to meet 600mA output current. This device is an excellent choice for

use in battery-powered applications, as active terminators for the SCSI bus, and portable computers. The AS1115 features very low

quiescent current and very low dropout voltage of 1.2V at a full load and lower as output current decreases. This product is available

as an adjustable or fixed 3V, 3.3V, and 5V output voltages.

The AS1115 is offered in a 3-pin surface mount package SOT-223, TO-252, TO-220 & TO-263. The output capacitor of 10µF or

larger is needed for output stability of AS1115 as required by most of the other regulator circuits.

ORDERING INFORMATION

TO-220

3-PIN

TO-263

3-PIN

SOT-223

3-PIN

PLASTIC

SOIC 8-PIN

AS1115S

TO-252

DPAK

Oper. Temp.

Range

AS1115U

AS1115T

AS1115T-X

AS1115M3

AS1115R

-40°C to +85°C

AS1115U-X

AS1115M3-X

AS1115S-X

AS1115R-X

-40°C to +85°C

X = Output Voltage (X = 1.5V, 2.5V, 3.0V, 3.3V, 5.0V or Blank for Adjustable).

PIN CONNECTIONS

8-Pin Surface Mount

TO-263-3 Package

TO-220 Package

TO-252 Package

SOT-223 Package

AS1115

GND

V_IN

V _IN

V_OUT

ADJ/GND

N/C

V_OUT

OUT

₃AS1115

V_IN

N/C

V_OUT

ADJ/GND

V_OUT

ADJ/GND

V_IN

Front View

Top View

Front View

Rev. 10/2/00

AS1115

ABSOLUTE MAXIMUM RATINGS

Power Dissipation..........................................Internally Limited

Lead Temp. (Soldering, 5 Seconds) ................................ 260°C

Storage Temperature Range ............................-65° to +150°C

Operating Junction Temperature Range

Input Supply Voltage ......................................-20V to +20V

ESD Rating ............................................................2KV Min

AS1115.................................................. -40C° to +125°C

ELECTRICAL CHARACTERISTICS at V_IN= V_OUT+1, Ta=25°C, CL =3.3µf, unless otherwise specified. Limits in

Boldface apply over the full operating temperature range.

AS1115

Typ

Min

Max

Parameter

Conditions

Units

1.5V Version

Output Voltage

I_OUT=10mA, V_IN=5.00V

0≤I_OUT≤600mA, 4.50≤V_IN≤10V

1.500

1.485

1.515

1.470

1.530

2.5V Version

Output Voltage

I_OUT=10mA, V_IN=5.00V

0≤I_OUT≤600mA, 4.50≤V_IN≤10V

2.500

3.000

3.300

5.000

2.475

2.450

2.525

2.550

3.0V Version

Output Voltage

I_OUT=10mA, V_IN=5.00V

0≤I_OUT≤600mA, 4.50≤V_IN≤10V

2.970

2.940

3.030

3.060

3.3 V Version

Output Voltage

I_OUT=10mA, V_IN=5.00V

0≤I_OUT≤600mA, 4.50≤V_IN≤10V

3.267

3.234

3.333

3.366

5.0V Version

Output Voltage

I_OUT=10mA, V_IN=5.00V

0≤I_OUT≤600mA, 4.50≤V_IN≤10

4.950

4.900

5.050

5.100

All Output Voltage

Reference Voltage

I_OUT=10mA, (V_IN-V_IN) =2V

10≤I_OUT≤600mA, 1.4≤(V_IN-V_IN) ≤10V

1.250

1.238

1.225

1.262

1.270

0.05

Output Voltage

Temperature Stability

Line Regulation

(Note 1)

1.00

7.00

4.50V ≤V_IN≤12V, V_OUT=3.00, I_OUT=0

4.80V ≤V_IN≤12V, V_OUT=3.30, I_OUT=0

6.50V ≤V_IN≤15V, V_OUT=5.00, I_OUT=0

0≤I_OUT≤600mA, V_IN=4.50V, V_OUT=3.00

0≤I_OUT≤600mA, V_IN=4.80V, V_OUT=3.30

0≤I_OUT≤600mA, V_IN=6.50V, V_OUT=5.00

I_L= 100mA

10.00

Load Regulation

12.00

15.00

Dropout Voltage

( Note 2)

1.00

1.10

I_L= 600mA

1.05

1.15

Quiescent Current

5.00

10.00

4.25V ≤V_IN≤6.5V

850

0.01

1000

0.1

%/W

Current Limit

Thermal Regulation

Ripple Rejection

(V_IN-V_OUT)=5V

25°°C,30mS Pulse

f_RIPPLE=120Hz, (V_IN-V_OUT) = 3V,

_RIPPLE=1V_p-p

0.03

0.003

Long Term Stability

RMS Output Noise

Thermal Resistance

125°C, 1000Hrs

°C/W°

% of V_OUT, 10Hz≤f≤10kHz

Junction to case, at tab

Note 1: Output temperature coefficient is defined as the worst case voltage change divided by the total temperature range

Note 2: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential at

very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account.

Note 3: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied. excluding loads or line

regulation effect

Rev. 10/2/00

AS1115

Maximum Junction Temperature range:

APPLICATION NOTES EXTERNAL

CAPACITOR

T_J= T_ambient(max) + P_D* thermal resistance(Junction-to-

ambient)

To ensure the stability of the AS1115 an output capacitor of

at least 10µF (tantalum)or 50µF (aluminum) is required. The

value may change based on the application requirements on

the output load or temperature range. The capacitor

equivalent series resistance (ESR) will effect the AS1115

stability. The value of ESR can vary from the type of

capacitor used in the applications. The recommended value

for ESR is 0.5Ω. The output capacitance could increase in

size to above the minimum value. The larger value of output

capacitance as high as 100µF can improve the load transient

response.

Maximum Junction temperature must not exceed the 125°C.

10V

2.85V

AS1115-3.3

SOLDERING METHODS

27K

Ω

10uF

The AS1115 SOT-223 package is designed to be compatible

with infrared reflow or vapor-phase reflow soldering

techniques. During soldering the non-active or mildly active

fluxes may be used. The AS1115 die is attached to the

heatsink lead which exits opposite the input, output, and

ground pins.

Hand soldering and wave soldering should be avoided since

these methods can cause damage to the device with excessive

P_O= (10V - 2.85)(105mA) = (7.15)(105mA) = 703mW

thermal gradients on the package.

The SOT-223

Fig. 1. Circuit Layout, Thermal Experiments.

recommended soldering method are as follows: vapor phase

reflow and infrared reflow with the component preheated to

within 65°C of the soldering temperature range.

THERMAL CHARACTERISTICS

50 X 50 mm

The thermal resistance of AS1115 is 15°C/W from junction

to tab and 31 °C/W from tab to ambient for a total of 46

°C/W from junction to ambient. The AS1115 features the

internal thermal limiting to protect the device during

overload conditions. Special care needs to be taken during

continuos load conditions the maximum junction temperature

does not exceed 125 °C.

35 X 17 mm

16 X 10 mm

Taking the FR-4 printed circuit board and 1/16 thick with 1

ounce copper foil as an experiment (fig.1 & fig.2), the PCB

material is effective at transmitting heat with the tab attached

to the pad area and a ground plane layer on the backside of

the substrate. Refer to table 1 for the results of the

experiment.

The thermal interaction from other components in the

application can effect the thermal resistance of the AS1115.

The actual thermal resistance can be determined with

experimentation. AS1115 power dissipation is calculated as

follows:

Fig. 2. Substrate Layout for SOT-223

P_D= (V_IN- V_OUT)(I_OUT

)

Rev. 10/2/00

AS1115

Table 1.

TOTAL PC BOARD AREA

TOPDIDE COPPER AREA

BACKSIDE COPPER AREA

THERMAL RESISTANCE

JUNCTION TO AMBIENT

2500mm

1600mm

2500mm

1600mm

900mm

2500mm

1250mm

950mm

2500mm

1800mm

600mm

1250mm

915mm

600mm

240mm

2500mm

46°C/W°

47°C/W°

49°C/W°

51°C/W°

53°C/W°

55°C/W°

58°C/W°

59°C/W°

67°C/W°

72°C/W°

85°C/W°

2500mm

1600mm

900mm

V_IN

OUT

AS1115

OUT

C₁

ADJ

R₁

LOAD

V_OUT= V_REF(1 + R₂) + I_ADJR₂

R₁

Typical Adjustable Regulator

600mA Current Output

Rev. 10/2/00

相关型号：