MIC39100-1.8BSTR [ROCHESTER]

1.8 V FIXED POSITIVE LDO REGULATOR, 0.63 V DROPOUT, PDSO4, SOT-223, 4 PIN;


型号：	MIC39100-1.8BSTR
厂家：	Rochester Electronics
描述：	1.8 V FIXED POSITIVE LDO REGULATOR, 0.63 V DROPOUT, PDSO4, SOT-223, 4 PIN 光电二极管输出元件调节器
文件：	总13页 (文件大小：1130K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MIC39100/39101/39102

Micrel

MIC39100/39101/39102

1A Low-Voltage Low-Dropout Regulator

General Description

Features

TheMIC39100,MIC39101,andMIC39102are1Alow-dropout

linearvoltageregulatorsthatprovidelow-voltage,high-current

outputfromanextremelysmallpackage.UtilizingMicrel’spro-

prietary Super βeta PNP™ pass element, the MIC39100/1/2

offers extremely low dropout (typically 410mV at 1A) and low

ground current (typically 11mA at 1A).

• Fixed and adjustable output voltages to 1.24V

• 410mV typical dropout at 1A

Ideal for 3.0V to 2.5V conversion

Ideal for 2.5V to 1.8V conversion

• 1A minimum guaranteed output current

• 1% initial accuracy

• Low ground current

The MIC39100 is a ﬁxed output regulator offered in the

SOT-223 package. The MIC39101 and MIC39102 are ﬁxed

and adjustable regulators, respectively, in a thermally en-

hanced power 8-lead SOIC package.

• Current limiting and thermal shutdown

• Reversed-battery protection

• Reversed-leakage protection

• Fast transient response

• Low-proﬁle SOT-223 package

• Power SO-8 package

The MIC39100/1/2 is ideal for PC add-in cards that need to

convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V to

1.8V.Aguaranteed maximum dropout voltage of 630mV over

all operating conditions allows the MIC39100/1/2 to provide

2.5V from a supply as low as 3.13V and 1.8V from a supply

as low as 2.43V.

Applications

• LDO linear regulator for PC add-in cards

• PowerPC™ power supplies

• High-efﬁciency linear power supplies

• SMPS post regulator

• Multimedia and PC processor supplies

• Battery chargers

The MIC39100/1/2 is fully protected with overcurrent limit-

ing, thermal shutdown, and reversed-battery protection.

Fixed voltages of 5.0V, 3.3V, 2.5V, and 1.8V are available

on MIC39100/1 with adjustable output voltages to 1.24V on

MIC39102.

• Low-voltage microcontrollers and digital logic

For other voltages, contact Micrel.

Typical Applications

100k

Error

Flag

Output

MIC39100

IN OUT

MIC39101

MIC39102

V_IN

3.3V

V_IN

3.3V

V_IN

2.5V

OUT

2.5V

OUT

1.5V

ENABLE

SHUTDOWN

ENABLE

SHUTDOWN

FLG

ADJ

10µF

tantalum

10µF

tantalum

10µF

tantalum

GND

2.5V/1A Regulator

2.5V/1A Regulator with Error Flag

1.5V/1A Adjustable Regulator

Super βeta PNP is a trademark of Micrel, Inc.

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

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Ordering Information

Part Number

Voltage Junction Temp. Range

Package

Standard

RoHS Compliant

MIC39100-1.8BS MIC39100-1.8WS*

MIC39100-2.5BS MIC39100-2.5WS*

MIC39100-3.3BS MIC39100-3.3WS*

MIC39100-5.0BS MIC39100-5.0WS*

MIC39101-1.8BM MIC39101-1.8YM

MIC39101-2.5BM MIC39101-2.5YM

MIC39101-3.3BM MIC39101-3.3YM

MIC39101-5.0BM MIC39101-5.0YM

1.8V

2.5V

3.3V

5.0V

1.8V

2.5V

3.3V

5.0V

Adj.

-40°C to +125°C

SOT-223

SOIC-8

MIC39102BM

MIC39102YM

* RoHS compliant with ‘high-melting solder’ exemption.

Pin Conﬁguration

GND

TAB

IN GND OUT

MIC39100-x.x

Fixed

SOT-223 (S)

GND

OUT

FLG

OUT

ADJ

MIC39101-x.x

Fixed

SOIC-8 (M)

MIC39102

Adjustable

SOIC-8 (M)

Pin Description

Pin No.

Pin Name

Pin Function

MIC39100 MIC39101 MIC39102

Enable (Input): CMOS-compatible control input. Logic high = enable, logic

low or open = shutdown.

Supply (Input)

OUT

FLG

Regulator Output

Flag (Output): Open-collector error ﬂag output. Active low = output under-

voltage.

ADJ

Adjustment Input: Feedback input. Connect to resitive voltage-divider

network.

2, TAB

5–8

GND

Ground

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Absolute Maximum Ratings (Note 1)

Operating Ratings (Note 2)

Supply Voltage (V ).......................................–20V to +20V

Supply Voltage (V )................................... +2.25V to +16V

Enable Voltage (V ) ..................................................+20V

Enable Voltage (V ) ..................................................+16V

Storage Temperature (T ) ........................ –65°C to +150°C

Maximum Power Dissipation (P

)..................... Note 4

D(max)

Lead Temperature (soldering, 5 sec.)........................ 260°C

Junction Temperature (T )........................ –40°C to +125°C

ESD, Note 3

Package Thermal Resistance

SOT-223 (θ ) .....................................................15°C/W

SOIC-8 (θ )........................................................20°C/W

Electrical Characteristics^{(Note 12)}

V_IN= V_OUT+ 1V; V_EN= 2.25V; T_J= 25°C, bold values indicate –40°C ≤ T_J≤ +125°C; unless noted

Symbol

Parameter

Condition

Min

Typ

Max

Units

V_OUT

Output Voltage

10mA

–1

–2

10mA ≤ I_OUT≤ 1A, V_OUT+ 1V ≤ V_IN≤ 8V

Line Regulation

I_OUT= 10mA, V_OUT+ 1V ≤ V_IN≤ 16V

V_IN= V_OUT+ 1V, 10mA ≤ I_OUT≤ 1A,

0.06

0.2

0.5

Load Regulation

ΔV_OUT/ΔT

ppm/°C

Output Voltage Temp. Coefﬁcient,

100

Note 5

V_DO

Dropout Voltage, Note 6

I_OUT= 100mA, ΔV_OUT= –1%

140

200

250

I_OUT= 500mA, ΔV_OUT= –1%

I_OUT= 750mA, ΔV_OUT= –1%

I_OUT= 1A, ΔV_OUT= –1%

275

330

500

550

630

410

400

I_GND

Ground Current, Note 7

I_OUT= 100mA, V_IN= V_OUT+ 1V

I_OUT= 500mA, V_IN= V_OUT+ 1V

I_OUT= 750mA, V_IN= V_OUT+ 1V

I_OUT= 1A, V_IN= V_OUT+ 1V

µA

6.5

I_OUT(lim)

Enable Input

V_EN

Current Limit

V_OUT= 0V, V_IN= V_OUT+ 1V

1.8

2.5

Enable Input Voltage

Enable Input Current

logic low (off)

logic high (on)

V_EN= 2.25V

0.8

2.25

I_EN

µA

V_EN= 0.8V

µA

Flag Output

I_FLG(leak)

Output Leakage Current

Output Low Voltage

V_OH= 16V

0.01

210

µA

V_FLG(do)

V_FLG

V_IN= 2.250V, I_OL, = 250µA, Note 9

300

400

Low Threshold

High Threshold

Hysteresis

% of V_OUT

99.2

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Symbol

Parameter

Condition

Min

Typ

Max

Units

MIC39102 Only

Reference Voltage

1.228 1.240 1.252

1.215

1.203

1.265

1.277

Note 10

Note 7

Adjust Pin Bias Current

120

Reference Voltage

Temp. Coefﬁcient

ppm/°C

Adjust Pin Bias Current

Temp. Coefﬁcient

0.1

nA/°C

Note 1. Exceeding the absolute maximum ratings may damage the device.

Note 2. The device is not guaranteed to function outside its operating rating.

Note 3. Devices are ESD sensitive. Handling precautions recommended.

Note 4. P_D(max)= (T_J(max)– T_A) ÷ θ_JA, where θ_JAdepends upon the printed circuit layout. See “Applications Information.”

Note 5. Output voltage temperature coefﬁcient is ΔV_{OUT(worst case)}÷ (T_J(max)– T_J(min)) where T_J(max)is +125°C and T_J(min)is –40°C.

Note 6. V_DO= V_IN– V_OUTwhen V_OUTdecreases to 98% of its nominal output voltage with V_IN= V_OUT+ 1V. For output voltages below 2.25V, dropout

voltage is the input-to-output voltage differential with the minimum input voltage being 2.25V. Minimum input operating voltage is 2.25V.

Note 7. I_GNDis the quiescent current. I_IN= I_GND+ I_OUT

Note 8. V_EN≤ 0.8V, V_IN≤ 8V, and V_OUT= 0V.

Note 9. For a 2.5V device, V_IN= 2.250V (device is in dropout).

Note 10. V_REF≤ V_OUT≤ (V_IN– 1V), 2.25V ≤ V_IN≤ 16V, 10mA ≤ I_L≤ 1A, T_J= T_MAX

Note 11. Thermal regulation is deﬁned as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line

regulation effects. Speciﬁcations are for a 200mA load pulse at V_IN= 16V for t = 10ms.

Note 12. Speciﬁcation for packaged product only.

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Typical Characteristics

P ower S upply

R ejection R atio

P ower S upply

R ejection R atio

P ower S upply

R ejection R atio

V_IN= 5V

V_OUT= 3.3V

V_IN= 5V

V_OUT= 3.3V

V_IN= 3.3V

V_OUT= 2.5V

I_OUT= 1A

C _OUT= 47µF

C _IN= 0

I_OUT= 1A

C _OUT= 10µF

C _IN= 0

C _OUT= 10µF

C _IN= 0

1E+1 1E+2 1E+3 1E+4 1E+5 1E+6

1k 10k

1E+1 1E+2 1E+3 1E+4 1E+5 1E+6

1k 10k

10 100

100k

10 100

FREQUENCY (Hz)

100k

10 100

FREQUENCY (Hz)

100k

FREQUENCY (Hz)

P ower S upply

R ejection R atio

Dropout Voltage

vs . Output C urrent

Dropout Voltage

vs . Temperature

600

550

500

450

400

350

300

500

450

400

350

300

250

200

150

100

V_IN= 3.3V

V_OUT= 2.5V

I_LOAD= 1A

2.5V

1.8V

3.3V

1.8V

T_A= 25°C

2.5V

I_OUT= 1A

C _OUT= 47µF

C _IN= 0

1E+1 1E+2 1E+3 1E+4 1E+5 1E+6

1k 10k

-40 -20

20 40 60 80 100 120

3.5

250 500 750 1000 1250

OUTPUT CURRENT (mA)

10 100

FREQUENCY (Hz)

100k

TEMPERATURE (°C)

Dropout C haracteris tics

(2.5V)

Dropout C haracteris tics

(3.3V)

G round C urrent

vs . Output C urrent

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

3.6

3.4

3.2

3.0

2.8

2.6

2.4

=100mA

LOAD

1.8V

2.5V

=750mA

3.3V

LOAD

=750mA

LOAD

=1A

LOAD

=1A

LOAD

200 400 600 800 1000

OUTPUT CURRENT (mA)

2.3

2.6

2.9

3.2

2.8

3.2

3.6

4.0

4.4

SUPPLY VOLTAGE (V)

G round C urrent

vs . S upply Voltage (2.5V)

G round C urrent

vs . S upply Voltage (2.5V)

G round C urrent

vs . S upply Voltage (3.3V)

1.4

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

1.2

1.0

0.8

0.6

0.4

0.2

_{LOAD =}100mA

=100mA

=10mA

LOAD

=1A

LOAD

₌10mA

LOAD

SUPPLY VOLTAGE (V)

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G round C urrent

vs . S upply Voltage (3.3V)

G round C urrent

vs . Temperature

G round C urrent

vs . Temperature

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

1.0

0.8

0.6

0.4

0.2

2.5V

3.3V

₌10mA

LOAD

=1A

LOAD

1.8V

3.3V

2.5V

1.8V

I_LOAD= 500mA

-40 -20

20 40 60 80 100 120

-40 -20

20 40 60 80 100 120

SUPPLY VOLTAGE (V)

TEMPERATURE (°C)

Output Voltage

vs . Temperature

G round C urrent

vs . Temperature

S hort C ircuit

vs . Temperature

3.40

3.35

3.30

3.25

3.20

2.5

2.0

1.5

1.0

0.5

I_LOAD= 1A

2.5V

3.3V

Typical 3.3V

Device

1.8V

2.5V

1.8V

3.3V

-40 -20

20 40 60 80 100 120

-40 -20

20 40 60 80 100 120

-40 -20

20 40 60 80 100 120

TEMPERATURE (°C)

E rror F lag

P ull-Up R es is tor

E nable C urrent

vs . Temperature

F lag-L ow Voltage

vs . Temperature

250

200

150

100

V_IN= 5V

V_IN= V_OUT+ 1V

F LAG -LOW

VOLTAG E

V_{E N}= 2.4V

F LAG HIG H

(OK)

V_IN= 2.25V

R _{P ULL-UP}= 22kΩ

F LAG LOW

(FAULT)

0.01 0.1

10 100 1000 10000

-40 -20

20 40 60 80 100 120 140

-40 -20

20 40 60 80 100 120 140

RESISTANCE (kΩ)

TEMPERATURE (°C)

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Functional Characteristics

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Micrel

Functional Diagrams

OUT

OV I_LIMIT

18V

1.240V

Ref.

Thermal

Shut-

down

MIC39100

GND

MIC39100 Fixed Regulator Block Diagram

OUT

O.V.

I_LIMIT

18V

1.180V

1.240V

Ref.

FLAG

Thermal

Shut-

down

GND

MIC39101

MIC39101 Fixed Regulator with Flag and Enable Block Diagram

OUT

O.V.

I_LIMIT

18V

1.240V

Ref.

ADJ

Thermal

Shut-

down

GND

MIC39102

MIC39102 Adjustable Regulator Block Diagram

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Input Capacitor

Applications Information

An input capacitor of 1µF or greater is recommended when

thedeviceismorethan4inchesawayfromthebulkacsupply

capacitance or when the supply is a battery. Small, surface

mount, ceramic chip capacitors can be used for bypassing.

Larger values will help to improve ripple rejection by bypass-

ing the input to the regulator, further improving the integrity

of the output voltage.

The MIC39100/1/2 is a high-performance low-dropout volt-

age regulator suitable for moderate to high-current voltage

regulator applications. Its 630mV dropout voltage at full load

and overtemperature makes it especially valuable in bat-

tery-powered systems and as high-efﬁciency noise ﬁlters in

post-regulatorapplications.UnlikeolderNPN-passtransistor

designs, where the minimum dropout voltage is limited by the

base-to-emitter voltage drop and collector-to-emitter satura-

tion voltage, dropout performance of the PNPoutput of these

Error Flag

The MIC39101 features an error ﬂag (FLG), which monitors

the output voltage and signals an error condition when this

voltage drops 5% below its expected value. The error ﬂag is

an open-collector output that pulls low under fault conditions

and may sink up to 10mA. Low output voltage signiﬁes a

number of possible problems, including an overcurrent fault

(the device is in current limit) or low input voltage. The ﬂag

output is inoperative during overtemperature conditions. A

devices is limited only by the low V saturation voltage.

Atrade-off for the low dropout voltage is a varying base drive

requirement.Micrel’sSuperβetaPNP™processreducesthis

drive requirement to only 2% of the load current.

The MIC39100/1/2 regulator is fully protected from damage

due to fault conditions. Linear current limiting is provided.

Output current during overload conditions is constant. Ther-

mal shutdown disables the device when the die temperature

exceedsthemaximumsafeoperatingtemperature.Transient

protection allows device (and load) survival even when the

input voltage spikes above and below nominal. The output

structure of these regulators allows voltages in excess of

the desired output voltage to be applied without reverse

pull-up resistor from FLG to either V or V

is required

OUT

for proper operation. For information regarding the minimum

and maximum values of pull-up resistance, refer to the graph

in the typical characteristics section of the data sheet.

Enable Input

TheMIC39101andMIC39102versionsfeatureanactive-high

enable input (EN) that allows on-off control of the regulator.

Current drain reduces to “zero” when the device is shutdown,

with only microamperes of leakage current. The EN input has

TTL/CMOScompatiblethresholdsforsimplelogicinterfacing.

current ﬂow.

MIC39100-x.x

V_IN

V_OUT

OUT

GND

C_IN

C_OUT

EN may be directly tied to V and pulled up to the maximum

supply voltage

Transient Response and 3.3V to 2.5V or 2.5V to 1.8V

Conversion

Figure 1. Capacitor Requirements

Output Capacitor

The MIC39100/1/2 has excellent transient response to

variations in input voltage and load current. The device has

been designed to respond quickly to load current variations

and input voltage variations. Large output capacitors are not

required to obtain this performance. A standard 10µF output

capacitor, preferably tantalum, is all that is required. Larger

values help to improve performance even further.

The MIC39100/1/2 requires an output capacitor to maintain

stability and improve transient response. Proper capaci-

tor selection is important to ensure proper operation. The

MIC39100/1/2 output capacitor selection is dependent upon

theESR(equivalentseriesresistance)oftheoutputcapacitor

to maintain stability. When the output capacitor is 10µF or

greater, the output capacitor should have an ESR less than

2Ω. This will improve transient response as well as promote

stability.Ultra-low-ESRcapacitors(<100mΩ),suchasceramic

chip capacitors, may promote instability.These very low ESR

levelsmaycauseanoscillationand/orunderdampedtransient

response.Alow-ESRsolidtantalumcapacitorworksextremely

well and provides good transient response and stability over

temperature. Aluminum electrolytics can also be used, as

long as the ESR of the capacitor is <2Ω.

By virtue of its low-dropout voltage, this device does not satu-

rate into dropout as readily as similar NPN-based designs.

When converting from 3.3V to 2.5V or 2.5V to 1.8V, the NPN

based regulators are already operating in dropout, with typi-

cal dropout requirements of 1.2V or greater. To convert down

to 2.5V or 1.8V without operating in dropout, NPN-based

regulators require an input voltage of 3.7V at the very least.

The MIC39100 regulator will provide excellent performance

with an input as low as 3.0V or 2.5V respectively. This gives

the PNP based regulators a distinct advantage over older,

NPN based linear regulators.

The value of the output capacitor can be increased without

limit. Higher capacitance values help to improve transient

response and ripple rejection and reduce output noise.

Minimum Load Current

TheMIC39100/1/2regulatorisspeciﬁedbetweenﬁniteloads.

If the output current is too small, leakage currents dominate

and the output voltage rises. A 10mA minimum load current

is necessary for proper regulation.

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Adjustable Regulator Design

Using the power SOIC-8 reduces the θ dramatically and

allows the user to reduce θ . The total thermal resistance,

(junction-to-ambient thermal resistance) is the limiting

MIC39102

factor in calculating the maximum power dissipation capabil-

V_IN

OUT

V_OUT

C_OUT

ity of the device. Typically, the power SOIC-8 has a θ of

ENABLE

SHUTDOWN

ADJ

20°C/W, this is signiﬁcantly lower than the standard SOIC-8

GND

which is typically 75°C/W. θ is reduced because pins 5

through 8 can now be soldered directly to a ground plane

whichsigniﬁcantlyreducesthecase-to-sinkthermalresistance

and sink to ambient thermal resistance.











V_OUT= 1.240V 1+



Low-dropout linear regulators from Micrel are rated to a

maximumjunctiontemperatureof125°C.Itisimportantnotto

exceed this maximum junction temperature during operation

of the device. To prevent this maximum junction temperature

frombeingexceeded, theappropriategroundplaneheatsink

must be used.

Figure 2. Adjustable Regulator with Resistors

The MIC39102 allows programming the output voltage any-

wherebetween1.24Vandthe16Vmaximumoperatingrating

of the family. Two resistors are used. Resistors can be quite

large, up to 1MΩ, because of the very high input impedance

and low bias current of the sense comparator: The resistor

values are calculated by:







OUT

R1 = R2

−1





SOIC-8

1.240

Where V is the desired output voltage. Figure 2 shows

component deﬁnition. Applications with widely varying load

currents may scale the resistors to draw the minimum load

current required for proper operation (see above).

ground plane

heat sink area

Power SOIC-8 Thermal Characteristics

AMBIENT

One of the secrets of the MIC39101/2’s performance is its

power SO-8 package featuring half the thermal resistance of

a standard SO-8 package. Lower thermal resistance means

more output current or higher input voltage for a given pack-

age size.

printed circuit board

Figure 3. Thermal Resistance

Figure 4 shows copper area versus power dissipation with

each trace corresponding to a different temperature rise

above ambient.

Lower thermal resistance is achieved by joining the four

ground leads with the die attach paddle to create a single-

piece electrical and thermal conductor. This concept has

been used by MOSFET manufacturers for years, proving

very reliable and cost effective for the user.

Fromthesecurves,theminimumareaofcoppernecessaryfor

the part to operate safely can be determined. The maximum

allowable temperature rise must be calculated to determine

operation along which curve.

Thermal resistance consists of two main elements, θ (junc-

tion-to-case thermal resistance) and θ (case-to-ambient

thermal resistance). See Figure 3. θ is the resistance from

the die to the leads of the package. θ is the resistance

from the leads to the ambient air and it includes θ (case-

to-sink thermal resistance) and θ (sink-to-ambient thermal

resistance).

900

800

900

= 125°C

800

700

600

500

400

300

200

100

∆T_{J A}

700

600

500

400

300

200

100

T_A= 85°C

50°C 25°C

0.25 0.50 0.75 1.00 1.25 1.50

POWER DISSIPATION (W)

0.25 0.50 0.75 1.00 1.25 1.50

POWER DISSIPATION (W)

Figure 4. Copper Area vs. Power-SOIC

Power Dissipation

Figure 5. Copper Area vs. Power-SOIC

Power Dissipation

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Quick Method

ΔT = T

– T

A(max)

J(max)

Determine the power dissipation requirements for the design

along with the maximum ambient temperature at which the

device will be operated. Refer to Figure 5, which shows safe

operating curves for three different ambient temperatures:

25°C, 50°C and 85°C. From these curves, the minimum

amount of copper can be determined by knowing the maxi-

mum power dissipation required. If the maximum ambient

temperature is 50°C and the power dissipation is as above,

836mW, the curve in Figure 5 shows that the required area

= 125°C

J(max)

= maximum ambient operating temperature

A(max)

For example, the maximum ambient temperature is 50°C,

the ΔT is determined as follows:

ΔT = 125°C – 50°C

ΔT = 75°C

Using Figure 4, the minimum amount of required copper can

bedeterminedbasedontherequiredpowerdissipation.Power

dissipation in a linear regulator is calculated as follows:

of copper is 160mm .

The θ of this package is ideally 63°C/W, but it will vary

depending upon the availability of copper ground plane to

which it is attached.

P = (V – V

) I

+ V ·I

IN GND

OUT OUT

If we use a 2.5V output device and a 3.3V input at an output

current of 1A, then our power dissipation is as follows:

P = (3.3V – 2.5V) × 1A + 3.3V × 11mA

P = 800mW + 36mW

P = 836mW

From Figure 4, the minimum amount of copper required to

operate this application at a ΔT of 75°C is 160mm .

August 2005

M9999-082505-B

MIC39100/39101/39102

Micrel

Package Information

3.15 (0.124)

2.90 (0.114)

7.49 (0.295)

6.71 (0.264)

3.71 (0.146)

3.30 (0.130)

2.41 (0.095)

2.21 (0.087)

1.04 (0.041)

0.85 (0.033)

4.7 (0.185)

4.5 (0.177)

DIMENSIONS:

MM (INCH)

1.70 (0.067)

16°

6.70 (0.264)

6.30 (0.248)

1.52 (0.060)

10°

0.10 (0.004)

0.38 (0.015)

10°

0.02 (0.0008)

0.25 (0.010)

MAX

0.84 (0.033)

0.64 (0.025)

0.91 (0.036) MIN

SOT-223 (S)

8-Lead SOIC (M)

MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com

This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use.

Micrel reserves the right to change circuitry and speciﬁcations at any time without notiﬁcation to the customer.

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can

reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into

the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a signiﬁcant injury to the user. A Purchaser's

use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify

Micrel for any damages resulting from such use or sale.

M9999-082505

August 2005

MIC39100-1.8BSTR [ROCHESTER]

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