Datasheet MIC5203 Datasheet (MICREL)

MIC5203 Micrel

MIC5203

µ

Cap™ 80mA Low-Dropout Voltage Regulator

General Description

The MIC5203 is a µCap™ 80mA linear voltage regulator with
very low dropout voltage (typically 20mV at light loads and
300mV at 80mA) and very low ground current (225µA at
20mA output), offering better than 3% initial accuracy with a
logic-compatible enable input.

The µCap™ regulator design is optimized to work with low­value, low-cost ceramic capacitors. The outputs typically
require only 0.47µF of output capacitance for stability.

Designed especially for hand-held, battery-powered devices,
the MIC5203 can be controlled by a CMOS or TTL compatible
logic signal. When disabled, power consumption drops nearly
to zero. If on-off control is not required, the enable pin may be
tied to the input for 3-terminal operation. The ground current
of the MIC5203 increases only slightly in dropout, further
prolonging battery life. Key MIC5203 features include current
limiting, overtemperature shutdown, and protection against
reversed battery.

The MIC5203 is available in 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,

4.0V, 4.5V, 4.75V, and 5.0V fixed voltages. Other voltages
are available; contact Micrel for details.

Typical Applications

Ordering Information

Features

• Tiny 4-lead and 5-lead surface-mount packages

• Wide Selection of output voltages

• Guaranteed 80mA output

• Low quiescent current

• Low dropout voltage

• Tight load and line regulation

• Low temperature coefficient

• Current and thermal limiting

• Reversed input polarity protection

• Zero off-mode current

• Logic-controlled shutdown

• Stability with low-ESR ceramic capacitors

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

3

Enable

Shutdown

Enable

Shutdown

LAxx

0.47µF

SOT-143 Version

15
2
34

LKxx

SOT-23-5 Version

V

OUT

0.47µF

Part Number Marking Voltage Junction Temp. Range Package

MIC5203-3.0BM4 LA30 3.0V –40°C to +125°C SOT-143
MIC5203-3.3BM4 LA33 3.3V –40°C to +125°C SOT-143
MIC5203-3.6BM4 LA36 3.6V –40°C to +125°C SOT-143
MIC5203-3.8BM4 LA38 3.8V –40°C to +125°C SOT-143
MIC5203-4.0BM4 LA40 4.0V –40°C to +125°C SOT-143
MIC5203-4.5BM4 LA45 4.5V –40°C to +125°C SOT-143
MIC5203-4.7BM4 LA47 4.75V –40°C to +125°C SOT-143
MIC5203-5.0BM4 LA50 5.0V –40°C to +125°C SOT-143
MIC5203-2.8BM5 LA28 2.8V –40°C to +125°C SOT-23-5
MIC5203-3.0BM5 LK30 3.0V –40°C to +125°C SOT-23-5

V

OUT

MIC5203-3.3BM5 LK33 3.3V –40°C to +125°C SOT-23-5
MIC5203-3.6BM5 LK36 3.6V –40°C to +125°C SOT-23-5
MIC5203-3.8BM5 LK38 3.8V –40°C to +125°C SOT-23-5
MIC5203-4.0BM5 LK40 4.0V –40°C to +125°C SOT-23-5
MIC5203-4.5BM5 LK45 4.5V –40°C to +125°C SOT-23-5
MIC5203-4.7BM5 LK47 4.75V –40°C to +125°C SOT-23-5
MIC5203-5.0BM5 LK50 5.0V –40°C to +125°C SOT-23-5

Other voltages available. Contact Micrel for details.

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MIC5203 Micrel

Pin Configuration

Pin Description

Identification

Part

EN

GND

12

LAxx

34

OUTIN

SOT-143 (M4)

GND

2

IN

13

EN

LKxx

45

NC

SOT-23-5 (M5)

OUT

Pin Number Pin Number Pin Name Pin Function

SOT-143 SOT-23-5

1 2 GND Ground
2 3 EN Enable (Input): TTL/CMOS compatible control input. Logic high = enabled;

logic low or open = shutdown.

3 1 IN Supply Input

4 NC Not internally connected.

4 5 OUT Regulator Output

Absolute Maximum Ratings (Note 1)

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

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

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

Storage Temperature Range (TS)............–60°C to +150°C

Operating Ratings (Note 2)

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

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

Junction Temperature Range...................–40°C to +125°C

Thermal Resistance (θJA)......................................... Note 3

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

IN

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MIC5203 Micrel

Electrical Characteristics

VIN = V

Symbol Parameter Conditions Min Typ Max Units

V

O

∆VO/∆T Output Voltage Temp. Coefficient Note 4 50 200 ppm/°C
∆V

O/VO

∆V

O/VO

VIN–V

I

Q

I

GND

I

GNDDO

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 guaranteed to function outside its operating rating.
Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is P

Note 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load

Note 6: 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 7: 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 8: 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 = 0.47µF; V

OUT

≥ 2.0V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.

EN

Output Voltage Accuracy –3 3 %

–4 4 %

Line Regulation VIN = V

+ 1V to 16V 0.008 0.3 %

OUT

0.5 %

Load Regulation IL = 0.1mA to 80mA, Note 5 0.08 0.3 %

0.5 %

O

Dropout Voltage, Note 6 IL = 100µA20mV

IL = 20mA 200 350 mV
IL = 50mA 250 mV

IL = 80mA 300 600 mV
Quiescent Current VEN ≤ 0.4V (shutdown) 0.01 10 µA
Ground Pin Current, Note 7 IL = 100µA, VEN ≥ 2.0V (active) 180 µA

IL = 20mA, VEN ≥ 2.0V (active) 225 750 µA

IL = 50mA, VEN ≥ 2.0V (active) 850 µA

IL = 80mA, VEN ≥ 2.0V (active) 1800 3000 µA
Ground Pin Current at Dropout VIN = V
Current Limit V

D

Thermal Regulation Note 8 0.05 %/W

OUT(nominal)

= 0V 180 250 mA

OUT

– 0.5V, Note 7 200 300 µA

Enable Input Voltage Level logic Low (off) 0.6 µA

logic high (on) 2.0 µA
Enable Input Current VIL ≤ 0.6V 0.01 1 µA

VIH ≥ 2.0V 15 50 µA

= (T
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The θJA is 250°C/W for
the SOT-143 and 220°C/W for the SOT-23-5 mounted on a printed circuit board.

range from 0.1mA to 150mA. 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 150mA load pulse at VIN = 16V for t = 10ms.

D(max)

J(max)–TA

) ÷ θJA. Exceeding the maximum

3

December 1998 3-143

MIC5203 Micrel

Typical Characteristics

Dropout Voltage

1000

DROPOUT VOLTAGE (mV)

vs. Output Current

CIN = 10µF

= 1µF

C

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

= 1µF

C

OUT

IL = 80mA

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

IL = 100µA

3

2

1

OUTPUT VOLTAGE (V)

0

01234567

IL = 80mA

CIN = 10µF

= 1µF

C

OUT

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

= 1µF

C

OUT

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

IL = 80mA

IL = 50mA

IL = 100µA

Output Voltage

vs. Output Current

4.0

3.5

3.0

2.5

CIN = 10µF

= 1µF

C

2.0

OUT

1.5

1.0

OUTPUT VOLTAGE (V)

0.5

0.0
0 50 100 150 200

OUTPUT CURRENT (mA)

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

= 1µF

C

OUT

3 DEVICES

HI / AVG / LO

CURVES APPLICABLE

AT 100µA AND 50mA

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

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

= 1µF

C

OUT

Short Circuit Current

200

180

160

140

120

OUTPUT CURRENT (mA)

100

vs. Temperature

CIN = 10µF

= 1µF

C

OUT

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Thermal Regulation

60
40
20

-20

-40

∆ OUTPUT (mV)

-60

100

50

LOAD (mA)

-50

(3.3V Version)

0

0

CL = 1µF

-2 0 2 4 6 8 10 12 14 16

TIME (ms)

Minimum Supply Voltage

3.5

3.4

MIN. SUPPLY VOLTAGE (V)

3.3

vs. Temperature

IL = 1mA

V

= 3.3V

OUT

CIN = 10µF

= 1µF

C

OUT

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

3-144 December 1998

MIC5203 Micrel

-400

-200

0

200

∆ OUTPUT (mV)

-50

0

50

100

-1 012345678

OUTPUT (mA)

TIME (ms)

-2

-1

0

1

2

3

∆ OUTPUT (V)

2

4

6

8

-0.2 0.0 0.2 0.4 0.6 0.8 1.0

INPUT (V)

TIME (ms)

0

20

40

60

80

100

10x10

0

100x10

0

1x10

3

10x10

3

100x10

3

1x10

6

RIPPLE VOLTAGE (dB)

FREQUENCY (Hz)

0

20

40

60

80

100

10x10

0

100x10

0

1x10

3

10x10

3

100x10

3

1x10

6

RIPPLE VOLTAGE (dB)

FREQUENCY (Hz)

200

Load Transient

0

-200

∆ OUTPUT (mV)

200

-400

OUTPUT (mA)

Awaiting Further
Characterization

Data

C

= 0.1µF

OUT

= V

V

IN

0

-1 012345678

3

TIME (ms)

Line Transient

OUT

2
1
0

∆ OUTPUT (V)

3

-2

2

Characterization

Data

Awaiting Further

-1

1

0

INPUT (V)

-1

-2

-0.2 0.0 0.2 0.4 0.6 0.8 1.0

CL = 0.1µF

= 1mA

I

L

TIME (ms)

+ 1

Load Transient

C

= 1µF

OUT

= V

V

IN

Line Transient

CL = 1µF

= 1mA

I

L

OUT

+ 1

100

Load Transient

0

C

= 10µF

-100

∆ OUTPUT (mV)

100

-200

OUT

= V

V

IN

OUT

50

0

OUTPUT (mA)

-50

-5 0 5 10 15 20

2

1

TIME (ms)

Line Transient

CL = 11µF

= 1mA

I

L

0

∆ OUTPUT (V)

8

-1

6

4

INPUT (V)

2

-0.2 0.0 0.2 0.4 0.6 0.8 1.0

TIME (ms)

+ 1

3

100

80

60

40

IL = 100µA
C

20

RIPPLE VOLTAGE (dB)

V

0

0

10x10

100

80

60

December 1998 3-145

40

20

RIPPLE VOLTAGE (dB)

0

0

10x10

Ripple Voltage

vs. Frequency

Awaiting Further

Characterization

Data

= 0.1µF

L

= V

+ 1

IN

OUT

0

3

1x10

100x10

FREQUENCY (Hz)

Ripple Voltage

vs. Frequency

IL = 100µA

= 1µF

C

L

= V

V

+ 1

IN

OUT

0

3

1x10

100x10

FREQUENCY (Hz)

3

10x10

3

10x10

3

100x10

3

100x10

6

1x10

6

1x10

Ripple Voltage

vs. Frequency

Awaiting Further
Characterization

IL = 1mA
C

= 0.1µF

L

V

= V

+ 1

IN

OUT

Ripple Voltage

vs. Frequency

IL = 1mA

= 1µF

C

L

= V

V

IN

OUT

Data

+ 1

Ripple Voltage

100

80

60

40

20

RIPPLE VOLTAGE (dB)

vs. Frequency

Awaiting Further

Characterization

IL = 50mA

= 0.1µF

C

L

V

= V

IN

0

0

0

10x10

FREQUENCY (Hz)

OUT

100x10

Data

+ 1

3

1x10

Ripple Voltage

0

IL = 50mA
C
V

0

10x10

vs. Frequency

= 1µF

L

= V

+ 1

IN

OUT

0

3

1x10

100x10

FREQUENCY (Hz)

100

80

60

40

20

RIPPLE VOLTAGE (dB)

3

10x10

3

10x10

3

100x10

3

100x10

6

1x10

6

1x10

MIC5203 Micrel

1000

100

0.1

OUTPUT IMPEDANCE (Ω)

0.01

Output Impedance

IL = 100µA

10

IL = 1mA

1

0

0

1x10

10x10

FREQUENCY (Hz)

0

100x10

IL = 100mA

3

3

1x10

10x10

3

100x10

6

1x10

Enable Characteristics

(3.3V Version)

5
4
3
2

Awaiting Further

1

Characterization

0

OUTPUT (V)

4

-1

2

0

ENABLE (V)

-2

-0.2 0.0 0.2 0.4 0.6 0.8 1.0

Data

CL = 0.1µF
I

L

TIME (ms)

= 100µA

Enable Characteristics

(3.3V Version)

5
4
3
2
1
0

OUTPUT (V)

4

-1

2

0

ENABLE (V)

-2

-0.2 0.0 0.2 0.4 0.6 0.8 1.0

CL = 1µF

= 100µA

I

L

TIME (ms)

Enable Characteristics

4.0

3.0

2.0

1.0

0.0

OUTPUT (V)

-1.0

ENABLE (V)

(3.3V Version)

Awaiting Further
Characterization

4

2

0

-2

-2 0246810

Data

TIME (µs)

CL = 0.1µF

= 100µA

I

L

Enable Characteristics

4.0

3.0

2.0

1.0

0.0

OUTPUT (V)

-1.0

ENABLE (V)

(3.3V Version)

CL = 1µF

= 100µA

I

4

2

0

-2

-2 0246810

L

TIME (µs)

Enable Voltage

1.50

1.25

1.00

0.75

ENABLE VOLTAGE (mV)

0.50

vs. Temperature

CIN = 10µF

= 1µF

C

OUT

= 1mA

I

L

V

OFF

ON

V

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Enable Current

vs. Temperature

40

30

20

10

ENABLE CURRENT (µA)

0

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

VEN = 2V

CIN = 10µF

= 1µF

C

OUT

= 1mA

I

L

VEN = 5V

3-146 December 1998

MIC5203 Micrel

Applications Information

Input Capacitor

A 0.1µF capacitor should be placed from IN to GND if there
is more than 10 inches of wire between the input and the ac
filter capacitor or when a battery is used as the input.

Output Capacitor

Typical PNP based regulators require an output capacitor to
prevent oscillation. The MIC5203 is ultrastable, requiring only

0.47µF of output capacitance for stability. The regulator is
stable with all types of capacitors, including the tiny, low-ESR
ceramic chip capacitors. The output capacitor value can be
increased without limit to improve transient response.

The capacitor should have a resonant frequency above
500kHz. Ceramic capacitors work, but some dielectrics have
poor temperature coefficients, which will affect the value of
the output capacitor over temperature. Tantalum capacitors
are much more stable over temperature, but typically are
larger and more expensive. Aluminum electrolytic capacitors

will also work, but they have electrolytes that freeze at about
–30C°. Tantalum or ceramic capacitors are recommended
for operation below –25C°.

No-Load Stability

The MIC5203 will remain stable and in regulation with no load
(other than the internal voltage divider) unlike many other
voltage regulators. This is especially important in CMOS
RAM keep-alive applications.

Enable Input

The MIC5203 features nearly zero off-mode current. When
EN (enable input) is held below 0.6V, all internal circuitry is
powered off. Pulling EN high (over 2.0V) re-enables the
device and allows operation. EN draws a small amount of
current, typically 15µA. While the logic threshold is TTL/
CMOS compatible, EN may be pulled as high as 20V,
independent of VIN.

3

December 1998 3-147