MICREL MIC5211-5.0BM6, MIC5211-3.3BM6, MIC5211-3.0BM6, MIC5211-3.3-5.0BM6, MIC5211-2.5BM6 Datasheet

MIC5211 Micrel

MIC5211

Dual µCap 80mA LDO Regulator

Preliminary Information

General Description

The MIC5211 is a dual µCap 80mA linear voltage regulator
with very low dropout voltage (typically 20mV at light loads),
very low ground current (225µA at 20mA output current), and
better than 3% initial accuracy. This dual device comes in the
miniature SOT-23-6 package, featuring independent logic
control inputs.

The µCap regulator design is optimized to work with low­value, low-cost ceramic capacitors. The outputs typically
require only 0.1µF of output capacitance for stability.

Designed especially for hand-held, battery-powered devices,
ground current is minimized using Micrel’s proprietary Super
ßeta PNP™ technology to prolong battery life. When dis­abled, power consumption drops nearly to zero.

Key features include SOT-23-6 packaging, current limiting,
overtemperature shutdown, and protection against reversed
battery conditions.

The MIC5211 is available in dual 1.8V, 2.5V, 2.7V, 2.8V,

3.0V, 3.3V, 3.6V, and 5.0V versions. Certain mixed voltages
are also available. Contact Micrel for other voltages.

Ordering Information

Features

• Stable with low-value ceramic or tantalum capacitors

• Independent logic controls

• Low quiescent current

• Low dropout voltage

• Mixed voltages available

• Tight load and line regulation

• Low temperature coefficient

• Current and thermal limiting

• Reversed input polarity protection

• Zero off-mode current

• Dual regulator in tiny SOT-23 package

• 2.5V to 16V input range

Applications

• Cellular telephones

• Laptop, notebook, and palmtop computers

• Battery-powered equipment

• Bar code scanners

• SMPS post regulator/dc-to-dc modules

• High-efficiency linear power supplies

Typical Application

Part Number Marking Voltage Junction Temp. Range Package

MIC5211-1.8BM6 LFBB 1.8V 0°C to +125°C SOT-23-6
MIC5211-2.5BM6 LFCC 2.5V –40°C to +125°C SOT-23-6
MIC5211-2.7BM6 LFDD 2.7V –40°C to +125°C SOT-23-6
MIC5211-2.8BM6 LFEE 2.8V –40°C to +125°C SOT-23-6
MIC5211-3.0BM6 LFGG 3.0V –40°C to +125°C SOT-23-6
MIC5211-3.3BM6 LFLL 3.3V –40°C to +125°C SOT-23-6
MIC5211-3.6BM6 LFQQ 3.6V –40°C to +125°C SOT-23-6
MIC5211-5.0BM6 LFXX 5.0V –40°C to +125°C SOT-23-6

Dual-Voltage Regulators

MIC5211-1.8/2.5BM6 LFBC 1.8V/2.5V 0°C to +125°C SOT-23-6
MIC5211-1.8/3.3BM6 LFBL 1.8V/3.3V 0°C to +125°C SOT-23-6
MIC5211-2.5/3.3BM6 LFCL 2.5V/3.3V –40°C to +125°C SOT-23-6
MIC5211-3.3/5.0BM6 LFLX 3.3V/5.0V –40°C to +125°C SOT-23-6

Other voltages available. Contact Micrel for details.

V

IN

MIC5211

Enable

Shutdown

Enable

Shutdown

Enable A

Enable B

16
2
3

5
4

0.1µF

V

0.1µF
V

OUTA

OUTB

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com

November 2000 1 MIC5211

MIC5211 Micrel

Pin Configuration

OUTA

IN

OUTB

46

5

Pin 1

Index

LFxx

13

2

ENA GND

Regulator A

Voltage Code

(V

OUTA

)

Part
Identification

ENB

Regulator B

Voltage Code

(V

OUTB

egatloVedoC

V8.1B
V5.2C
V7.2D
V8.2E

V3G

V51.3H
V3.3L
V6.3Q

V5X

)

Pin Description

Pin Number Pin Name Pin Function

1 ENA Enable/Shutdown A (Input): CMOS compatible input. Logic high = enable,

2 GND Ground
3 ENB Enable/Shutdown B (Input): CMOS compatible input. Logic high = enable,

4 OUTB Regulator Output B
5 IN Supply Input
6 OUTA Regulator Output A

logic low or open = shutdown.

logic low or open = shutdown.

MIC5211 2 November 2000

MIC5211 Micrel

Absolute Maximum Ratings (Note 1)

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

Enable Input Voltage (V
Power Dissipation (P

Storage Temperature Range ................... –60°C to +150°C

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

) ........................... –20V to +20V

EN

) ............................Internally Limited

D

Operating Ratings (Note 2)

Supply Input Voltage (VIN) ............................... 2.5V to 16V

Enable Input Voltage (V
Junction Temperature (T

1.8V only .................................................. 0°C to +125°C

6-lead SOT-23-6 (θJA).............................................. Note 4

) ................................. 0V to 16V

EN

) (except 1.8V). –40°C to +125°C

J

ESD, (Note 3) .....................................................................

Electrical Characteristics

VIN = V
for one-half of dual MIC5211; unless noted.

Symbol Parameter Conditions Min Typical Max Units

V

O

∆V

O

∆V

O/VO

∆V

O/VO

VIN – V

I

Q

I

GND

I

LIMIT

∆VO/∆P

Enable Input

V

IL

V

IH

I

IL

I

IH

Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The device is not guareented to function outside itsperating rating.
Note 3: Devices are ESD sensitive. Handling precautions recommended.
Note 4: The maximum allowable power dissipation at any TA (ambient temperature) is P

Note 5: Output voltage temperature coeffiecient is defined as the worst case voltage change divided by the total temperature range.
Note 6: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load

Note 7: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V

Note 8: Ground pin current is the quiescent current per regulator plus pass transistor base current. The total current drawn from the supply is the sum

Note 9: 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

+ 1V; IL = 1mA; CL = 0.1µF, and V

OUT

Output Voltage variation from nominal V
Accuracy –44%

≥ 2.0V; TJ = 25°C, bold values indicate –40°C to +125°C;

EN

OUT

–33%

/∆T Output Voltage Note 5 50 200 ppm/°C

Temperature Coeffcient
Line Regulation VIN = V

+1V to 16V 0.008 0.3 %

OUT

0.5 %

Load Regulation IL = 0.1mA to 50mA, Note 6 0.08 0.3 %

0.5 %

O

Dropout Voltage, Note 7 IL = 100µA20mV

IL = 20mA 200 450 mV
IL = 50mA 250 500 mV

Quiescent Current VEN ≤ 0.4V (shutdown) 0.01 10 µA
Ground Pin Current VEN ≥ 2.0V, IL = 100µA (active) 90 µA
Note 8 IL = 20mA (active) 225 450 µA

IL = 50mA (active) 750 1200 µA

Current Limit V

D

Thermal Regulation Note 9 0.05 %/W

= 0V 140 250 mA

OUT

Enable Input Voltage Level

logic low (off) 0.6 V
logic high (on) 2.0 V

Enable Input Current VIL ≤ 0.6V 0.01 1 µA

VIH ≥ 2.0V 3 50 µA

= (T
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The θJA is 220°C/W for
the SOT-23-6 mounted on a printed circuit board.

range from 0.1mA to 50mA. Change in output voltage due to heating effects are covered by thermal regulation specification.

differential. For output voltages below 2.5V, dropout voltage is the input-to-output voltage differential with the minimum voltage being 2.5V.
Minimum input opertating voltage is 2.5V.

of the load current plus the ground pin current.

regulation effects. Specifications are for a 50mA load pulse at VIN = 16V for t = 10ms.

D(max)

– TA) / θJA. Exceeding the maximum

J(max)

November 2000 3 MIC5211

MIC5211 Micrel

Typical Characteristics

Dropout Voltage

1000

DROPOUT VOLTAGE (V)

vs. Output Current

CIN = 10µF
C

= 1µF

OUT

100

10

1

0.01 0.1 1 10 100

OUTPUT CURRENT (mA)

Ground Current

2000

1500

1000

GROUND CURRENT (µA)

vs. Output Current

500

VIN = V

0

0 1020304050607080

OUTPUT CURRENT (mA)

OUT

+ 1V

Dropout Voltage

400

300

200

100

DROPOUT VOLTAGE (mV)

vs. Temperature

CIN = 10µF
C

= 1µF

OUT

IL = 50mA

IL = 1mA

0

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

IL = 100µA

Ground Current

vs. Supply Voltage

2.0

1.5
IL = 100µA

1.0

0.5

GROUND CURRENT (mA)

0.0

01234567

IL = 50mA

V

= 3.3V

OUT

SUPPLY VOLTAGE (V)

Dropout Characteristics

4

3

2

1

OUTPUT VOLTAGE (V)

0

(MIC5211-3.3)

IL = 100µA

IL = 50mA

CIN = 10µF
C

= 1µF

OUT

01234567

SUPPLY VOLTAGE (V)

Ground Current

3.0

2.5

2.0

1.5

1.0

0.5

GROUND CURRENT (mA)

0.0

vs. Temperature

CIN = 10µF
C

= 1µF

OUT

IL = 50mA

IL = 100µA

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Output Voltage

vs. Output Current

4.0

3.5

3.0

2.5

CIN = 10µF
C

2.0

1.5

1.0

OUTPUT VOLTAGE (V)

0.5

0.0

= 1µF

OUT

0 50 100 150 200

OUTPUT CURRENT (mA)

Short Circuit Current

160
140
120
100

SHORT CIRCUIT CURRENT (mA)

vs. Input Voltage

80
60
40
20

0

01234567

INPUT VOLTAGE (V)

CIN = 10µF
C

= 1µF

OUT

Short Circuit Current

200

180

160

140

120

OUTPUT CURRENT (mA)

100

vs. Temperature

CIN = 10µF
C

= 1µF

OUT

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Output Voltage

4.0

3.8

3.6

3.4

3.2

3.0

2.8

OUTPUT VOLTAGE (V)

2.6

2.4

vs. Temperature

CIN = 10µF
C

= 1µF

OUT

3 DEVICES

HI / AVG / LO

CURVES APPLICABLE

AT 100µA AND 50mA

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

MIC5211 4 November 2000