Datasheet MIC5201 Datasheet (MICREL)

MIC5201 Micrel

MIC5201

200mA Low-Dropout Voltage Regulator

General Description

The MIC5201 is an efficient linear voltage regulator with very
low dropout voltage (typically 17mV at light loads and 200mV
at 100mA), and very low ground current (1mA at 100mA
output), offering better than 1% initial accuracy with a logic
compatible on-off switching input.

Designed especially for hand-held battery powered devices,
the MIC5201 can be switched by a CMOS or TTL compatible
enable signal. This enable control may be connected directly
to VIN if unneeded. When disabled, power consumption
drops nearly to zero. The ground current of the MIC5201
increases only slightly in dropout, further prolonging battery
life. Key MIC5201 features include current limiting,
overtemperature shutdown, and protection against reversed
battery.

The MIC5201 is available in several fixed voltages and
accuracy configurations. It features the same pinout as the
LT1121 with better performance. Other options are available;
contact Micrel for details.

Ordering Information

Features

• High output voltage accuracy

• Variety of output voltages

• Guaranteed 200mA output

• Low quiescent current

• Low dropout voltage

• Extremely tight load and line regulation

• Very low temperature coefficient

• Current and thermal limiting

• Reversed-battery protection

• Load-dump protection (fixed voltage versions)

• Zero off-mode current

• Logic-controlled electronic enable

• Available in SO-8 and SOT-223 packages

Applications

• Cellular telephones

• Laptop, notebook, and palmtop computers

• Battery powered equipment

• PCMCIA VCC and V

• Bar code scanners

• SMPS post-regulator/ dc-to-dc modules

• High-efficiency linear power supplies

regulation/switching

PP

Typical Application

ENABLE

SHUTDOWN

Part Number Voltage Junction Temp. Range* Package

MIC5201BM Adj –40°C to +125°C SO-8
MIC5201-3.0BM 3.0 –40°C to +125°C SO-8
MIC5201-3.3BM 3.3 –40°C to +125°C SO-8
MIC5201-5.0BM 5.0 –40°C to +125°C SO-8
MIC5201-3.0BS 3.0 –40°C to +125°C SOT-223
MIC5201-3.3BS 3.3 –40°C to +125°C SOT-223
MIC5201-4.8BS 4.85 –40°C to +125°C SOT-223
MIC5201-5.0BS 5.0 –40°C to +125°C SOT-223

Other voltages available. Contact Micrel for details.
* Junction Temperature.

MIC5201-3.3

IN OUT
EN

GND

1µF

V

OUT

3.3V

MM8 is a trademark of Micrel, Inc.

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

July 1998 1 MIC5201

MIC5201 Micrel

Pin Configuration

GND

TAB

132

IN OUTGND

OUT

ADJ

GND

NC

1
2
3
4

8

IN

7

NC

6

NC

5

EN

MIC5201-x.xBS

SOT-223

Fixed

MIC5201BM

8-Lead SOIC

Adjustable

Pin Description

Pin No. Pin No. Pin No. Pin Name Pin Function

SOT-223 SO-8 Adj. SO-8 Fixed

3 1 1 OUT Regulated Output

2 ADJ Feedback Input: (Adjustable version only)

4, 6, 7 2, 4, 6, 7 NC not internally connected: Connect to ground plane for lowest thermal

resistance.

2 3 3 GND Ground

5 5 EN Enable (Input): TTL compatible input. High = enable.

Low or open = off/disable.

188 VINUnregulated Supply Input

OUT

NC

GND

NC

1
2
3
4

MIC5201-x.xBM

8-Lead SOIC

Fixed

8

IN

7

NC

6

NC

5

EN

Absolute Maximum Ratings

Supply Input Voltage (VIN) Fixed .................. –20V to +60V

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

Enable Input Voltage (VEN) Fixed ................. –20V to +60V

Enable Input Voltage (VEN) Adjustable ......... –20V to +20V

Operating Ratings

Supply Input Voltage (VIN) Fixed ................... 2.5V to +26V

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

Enable Input Voltage (VEN) .................................. 0V to V

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

IN

Power Dissipation (PD) ............................ Internally Limited

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

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

MIC5201 2 July 1998

MIC5201 Micrel

Electrical Characteristics

VIN = V

Symbol Parameter Condition Min Typ Max Units

V

O

∆VO/∆T Output Voltage Temperature Coef. Note 2 40 150 ppm/°C
∆V

O/VO

∆V

O/VO

∆V

O/VO

– V

V

IN

I

GND

I

GND

PSRR Ripple Rejection 75 dB
I

GNDDO

I

LIMIT

∆VO/∆P
e

n

Enable Input

V

IL

V

IH

I

IL

I

IH

Reference (MIC5201 Adjustable Version Only)

V

REF

I

IL

General Note: Devices are ESD sensitive. Handling precautions recommended.
Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when

Note 2: Output voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range.
Note 3: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load

Note 4: 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 5: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of

Note 6: 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 = 100µA; CL = 3.3µF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted

OUT

Output Voltage Accuracy Variation from specified V

Line Regulation, Fixed VIN = V

+ 1V to 26V 0.004 0.20 %

OUT

OUT

–1 1 %

–2 2 %

0.40 %

Line Regulation, Adjustable VIN = V

+ 1V to 16V 0.004 0.20 %

OUT

0.40 %

Load Regulation IL = 0.1mA to 200mA, Note 3 0.04 0.16 %

0.30 %

O

Dropout Voltage, Note 4 IL = 100µA17mV

I

= 20mA 130 mV

L

= 50mA 180 mV

I

L

= 100mA 225 mV

I

L

IL = 200mA 270 400 mV

Quiescent Current V

≤ 0.7V (shutdown) 0.01 µA

ENABLE

Ground Pin Current IL = 100µA 130 µA

= 20mA 270 400 µA

I

L

I

= 50mA 500 µA

L

= 100mA 1000 2000 µA

I

L

IL = 200mA 3000 µA

Ground Pin Current at Dropout VIN = 0.5V less than specified V

, 270 330 µA

OUT

IL = 100µA, Note 5

Current Limit V

D

Thermal Regulation Note 6 0.05 %/W

= 0V 280 500 mA

OUT

Output Noise 100 µV

Input Voltage Level logic low (off) 0.7 V
Input Voltage Level logic high (on) 2.0 V
Enable Input Current VIL ≤ 0.7V 0.01 1 µA
Enable Input Current VIH ≤ 2.0V 15 50 µA

Reference Voltage 1.223 1.242 1.255 V

1.217 1.267 V

Reference Voltage Temp. Coef. 20 ppm/°C

operating the device outside of its rated operating conditions. The maximum allowable power dissipation is a function of the maximum junction
temperature, T
dissipation at any ambient temperature is calculated using: P
will result in excessive die temperature, and the regulator will go into thermal shutdown. The θJC of the MIC5201-x.xBS is 15°C/W and θJA for
the MIC5201BM is 160°C/W mounted on a PC board (see “Thermal Considerations” section for further details).

range from 0.1mA to 200mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

differential.

the load current plus the ground pin current.

regulation effects. Specifications are for a 200mA load pulse at VIN = 26V for fixed and VIN = 16V for adjustable at t = 10ms.

, the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power

J(max)

(max)

= (T

J(max)–TA

) ÷ θJA. Exceeding the maximum allowable power dissipation

July 1998 3 MIC5201

MIC5201 Micrel

Block Diagrams

V

IN

IN

OUT

V

OUT

C

OUT

Bandgap

Ref.

Current Limit

Thermal Shutdown

MIC5201-x.xBS

GND

Fixed Regulator (SOT-223 version only)

V

IN

IN

Bandgap

Ref.

V

REF

EN

OUT

V

OUT

C

OUT

Current Limit

Thermal Shutdown

MIC5201-x.xBM

GND

Fixed Regulator

V

IN

IN

Bandgap

Ref.

V

REF

EN

Current Limit

Thermal Shutdown

MIC5201BM [adj.]

GND

OUT

ADJ

R1

R2

V

OUT

C

OUT

Adjustable Regulator

MIC5201 4 July 1998

MIC5201 Micrel

0.0

0.1

0.2

0.3

0.4

-60 -30 0 30 60 90 120 150

DROPOUT VOLTAGE (V)

TEMPERATURE (°C)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

0246810

GROUND CURRENT (mA)

SUPPLY VOLTAGE (V)

1.0

1.1

1.2

1.3

1.4

1.5

-50 0 50 100 150

GROUND CURRENT (mA)

TEMPERATURE (°C)

100

120

140

160

180

200

220

240

260

280

300

-60 -30 0 30 60 90 120 150

OUTPUT CURRENT (mA)

TEMPERATURE (°C)

Typical Characteristics

Dropout Voltage

vs. Output Current

250

200

150

100

50

DROPOUT VOLTAGE (mV)

0

0.01 0.1 1 10 100 1000

OUTPUT CURRENT (mA)

Ground Current

vs. Output Current

10

1

GROUND CURRENT (mA)

0.1

0.01 0.1 1 10 100

OUTPUT CURRENT (mA)

Dropout Voltage
vs. Temperature

IL = 100mA

IL = 1mA

Ground Current

vs. Supply Voltage

IL = 100mA

IL = 1mA

Dropout

3.5

3.0

2.5

2.0

1.5

1.0

OUTPUT VOLTAGE (V)

0.5

0.0

Characteristics

IL = 100mA

IL = 100µA, 1mA

0246810

INPUT VOLTAGE (V)

Output Voltage

vs. Output Current

3.5

3.0

2.5

2.0

1.5

1.0

OUTPUT VOLTAGE (V)

0.5

0.0

0.0 0.1 0.2 0.3

CIN = 2.2µF

= 4.7µF

C

OUT

OUTPUT CURRENT (A)

0.30

0.25

0.20

GROUND CURRENT (mA)

0.15

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Output Voltage vs. Temp.

3.6
CIN = 2.2µF

3.5
C

OUT

3.4

3.3

July 1998 5 MIC5201

3.2

3.1

OUTPUT VOLTAGE (V)

CURVES APPLICABLE

AT 100µA AND 100mA

3.0

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Ground Current

vs. Temperature

I

= 100µA

LOAD

= 2.2µF

C

IN

= 4.7µF

C

OUT

(3.3V Version)

= 4.7µF

3 DEVICES:

HI / AVG / LO

Ground Current

vs. Temperature

I

= 100mA

LOAD

= 2.2µF

C

IN

= 4.7µF

C

OUT

Output Current

vs. Temperature

V

= 3.3V

OUT

V

= 0V

OUT

(SHORT CIRCUIT)

Thermal Regulation

100

50

∆ OUTPUT (mV)

200

-50

100

LOAD (mA)

-100

(3.3V Version)

0

0

-5 0 5 10 15 20 25 30 35

CL = 4.7 µF

TIME (ms)

Minimum Input Voltage

3.30

3.29

3.28

3.27

3.26

3.25

3.24

3.23

3.22

MIN. INPUT VOLTAGE (V)

3.21

3.20

vs. Temperature

CIN = 2.2µF

= 4.7µF

C

OUT

= 1mA

I

LOAD

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

MIC5201 Micrel

Short Circuit Current

300

250

200

150

100

SHORT CIRCUIT CURRENT (mA)

vs. Input Voltage

CIN = 2.2µF

= 4.7µF

C

OUT

= 3.3V

50

0

1234567

V

OUT

INPUT VOLTAGE (V)

-10

-20

∆ OUTPUT (mV)

-30

300

200

100

OUTPUT (mA)

Load Transient

20
10

0

CL = 4.7µF

0

-2 0246810

TIME (ms)

Load Transient

20
10

0

-10

-20

∆ OUTPUT (mV)

-30

300

CL = 47µF

200

100

OUTPUT (mA)

0

-10 0 10203040

TIME (ms)

Supply Current vs. Supply

Voltage (3.3V Version)

120

100

80

60

40

20

SUPPLY CURRENT (mA)

0

012345678910

SUPPLY VOLTAGE (V)

RL = 33Ω

Supply Current vs. Supply

Voltage (3.3V Version)

60

50

40

30

20

10

SUPPLY CURRENT (mA)

0

01234567

RL = 66Ω

SUPPLY VOLTAGE (V)

10

∆ OUTPUT (mV)

-10

INPUT (V)

Line Transient

5
0

-5

8

6

4

2

-0.2 0 0.2 0.4 0.6 0.8

CL = 1 µF

= 1mA

I

L

TIME (ms)

Enable Transient

(3.3V Version)

5
4
3
2
1
0

OUTPUT (V)

4

-1

2

0

ENABLE (V)

-2

-50 0 50 100 150 200 250 300

CL = 4.7 µF

= 1mA

I

L

TIME (µs)

Line Transient

15
10

5
0

∆ OUTPUT (mV)

8

-5

6

4

INPUT (V)

2

-0.1 0 0.1 0.2 0.3 0.4 0.5 0.6

CL = 10 µF

= 1mA

I

L

TIME (ms)

Enable Transient

(3.3V Version)

5
4
3
2
1
0

OUTPUT (V)

4

-1

2

0

ENABLE (V)

-2

-50 0 50 100 150 200 250 300

CL = 4.7 µF

= 100mA

I

L

TIME (µs)

1000

100

0.1

0.01

OUTPUT IMPEDANCE (Ω)

0.001

Output Impedance

IL = 100µA

10

1

0

0

1x10

10x10

FREQUENCY (Hz)

IL = 1mA

IL = 100mA

0

100x10

3

1x10

3

10x10

3

100x10

6

1x10

Enable Current Threshold

vs. Temperature

35
30
25
20
15
10

5

ENABLE CURRENT (µA)

0

-5

-60 -30 0 30 60 90 120 150

CIN = 2.2µF

= 4.7µF

C

OUT

VEN = 5V

VEN = 2V

TEMPERATURE (°C)

Enable Voltage Threshold

1.6

1.4

1.2

0.8

ENABLE VOLTAGE (V)

0.6

0.4

vs. Temperature

CIN = 2.2µF

= 4.7µF

C

OUT

1

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

ON

OFF

MIC5201 6 July 1998

MIC5201 Micrel

0

20

40

60

80

100

10x10

0

100x10

0

1x10

3

10x10

3

100x10

3

1x10

6

RIPPLE VOLTAGE (dB)

FREQUENCY (Hz)

Ripple

0

0

10x10

vs. Frequency

IL = 100µA

0

3

1x10

100x10

FREQUENCY (Hz)

100

80

60

40

20

RIPPLE VOLTAGE (dB)

3

10x10

3

100x10

6

1x10

Ripple

vs. Frequency

IL = 1mA

Ripple

0

0

10x10

vs. Frequency

0

3

1x10

100x10

FREQUENCY (Hz)

100

80

60

40

20

RIPPLE VOLTAGE (dB)

IL = 100mA

3

10x10

3

100x10

6

1x10

July 1998 7 MIC5201

MIC5201 Micrel

Applications Information

Figure 1 shows a basic fixed-voltage application with the
unused enable input connected to VIN.

MIC5201-x.xBM
MIC5201-x.xBS

V

IN

IN OUT
EN

GND

V

1µF

OUT

Figure 3. Decreasing Ouput Noise

V

IN

MIC5201BM

IN OUT
EN ADJ

GND

R1

R2

C

3.3µF

ADJ

V

OUT

Minimum Load

The MIC5201 will remain stable and in regulation with no load

Figure 1. Fixed Application

Adjustable regulators require two resistors to set the output
voltage. See Figure 2.

MIC5201BM

V

IN

IN OUT
EN ADJ

GND

V 1.242V 1

=+

OUT

R1

R2

R2













R1

V

OUT

3.3µF

unlike many other voltage regulators. This is especially
important in CMOS RAM keep-alive applications.

Dual-Supply Systems

When used in dual supply systems where the regulator load
is returned to a negative supply, the output voltage must be
diode clamped to ground.Thermal Considerations

Layout

The MIC5201-x.xBM (8-pin surface mount package) has the
following thermal characteristics when mounted on a single

Figure 2. Adjustable Application

layer copper-clad printed circuit board.

Resistors values are not critical because ADJ (adjust) has a
high impedance, but for best results use resistors of 470kΩ
or less.

Output Capacitors

A 1µF capacitor is recommended between the MIC5201
output and ground to prevent oscillations due to instability.
Larger values serve to improve the regulator’s transient
response. Most types of tantalum or aluminum electrolytics
will be adequate; film types will work, but are costly and
therefore not recommended. Many aluminum electrolytics
have electrolytes that freeze at about –30°C, so solid tanta­lums are recommended for operation below –25°C. The
important parameters of the capacitor are an effective series
resistance of about 5Ω or less and a resonant frequency
above 500kHz. The value of this capacitor may be increased
without limit.

At lower values of output current, less output capacitance is
required for output stability. The capacitor can be reduced to

0.47µF for current below 10mA or 0.33µF for currents below
1mA.

Input Capacitors

A 1µF capacitor should be placed from the MIC5201 input to
ground if there is more than 10 inches of wire between the
input and the ac filter capacitor or if a battery is used as the
input.

draoBCP
cirtceleiD

θθθθθ

AJ

4RFW/C°061

cimareCW/C°021

Multilayer boards having a ground plane, wide traces near the
pads, and large supply bus lines provide better thermal
conductivity.

The “worst case” value of 160°C/W assumes no ground
plane, minimum trace widths, and a FR4 material board.

Nominal Power Dissipation and Die Temperature

The MIC5201-x.xBM at a 25°C ambient temperature will
operate reliably at up to 625mW power dissipation when
mounted in the “worst case” manner described above. At an
ambient temperature of 55°C, the device may safely dissi­pate 440mW. These power levels are equivalent to a die
temperature of 125°C, the recommended maximum tem­perature for non-military grade silicon integrated circuits.

For MIC5201-x.xBS (SOT-223 package) heat sink character­istics, please refer to Micrel Application Hint 17,

Heat Sinking

.

P.C. Board

50 mil

Noise Reduction Capacitors

245 mil

150 mil

On adjustable devices, a capacitor from ADJ to GND will
decrease high-frequency noise on the output. See Figure 3.

30 mil 50 mil

Figure 4. Min. Recommended SO-8 PCB Pads Size

MIC5201 8 July 1998

MIC5201 Micrel

Package Information

0.026 (0.65)
MAX)

PIN 1

0.157 (3.99)

0.150 (3.81)

0.050 (1.27)

0.064 (1.63)

0.045 (1.14)

2.41 (0.095)

2.21 (0.087)

4.7 (0.185)

4.5 (0.177)

0.10 (0.004)

0.02 (0.0008)

TYP

0.197 (5.0)

0.189 (4.8)

3.15 (0.124)

2.90 (0.114)

C

L

0.020 (0.51)

0.013 (0.33)

0.0098 (0.249)

0.0040 (0.102)

SEATING

PLANE

8-Pin SOIC (M)

C

L

6.70 (0.264)

6.30 (0.248)

DIMENSIONS:

INCHES (MM)

0°–8°

3.71 (0.146)

3.30 (0.130)

1.04 (0.041)

0.85 (0.033)

1.70 (0.067)

1.52 (0.060)
10°

MAX

0.050 (1.27)

0.016 (0.40)

0.244 (6.20)

0.228 (5.79)

7.49 (0.295)

6.71 (0.264)

16°
10°

45°

DIMENSIONS:

MM (INCH)

0.038 (0.015)

0.25 (0.010)

0.010 (0.25)

0.007 (0.18)

0.84 (0.033)

0.64 (0.025)

SOT-223 (S)

0.91 (0.036) MIN

July 1998 9 MIC5201

MIC5201 Micrel

MIC5201 10 July 1998

MIC5201 Micrel

July 1998 11 MIC5201

MIC5201 Micrel

MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 [phone] FAX + 1 [phone] WEB http://www.micrel.com

This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or

other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.

© 1998 Micrel Incorporated

MIC5201 12 July 1998