Datasheet MIC5200 Datasheet (MICREL)

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Page 1

MIC5200 Micrel

MIC5200

100mA Low-Dropout Voltage Regulator

Preliminary Information

General Description

The MIC5200 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 MIC5200 is switched by a CMOS or TTL compatible logic signal. The ENABLE control may be tied directly to VIN if unneeded. When disabled, power consumption drops nearly to zero. The ground current of the MIC5200 increases only slightly in dropout, further prolonging battery life. Key MIC5200 features include protection against reversed battery, current limiting, and overtemperature shutdown.

The MIC5200 is available in several fixed voltages and accuracy configurations. Other options are available; contact

Micrel for details.

Features

• High output voltage accuracy

• Variety of output voltages

• Guaranteed 100mA output

• Low quiescent current

• Low dropout voltage

• Extremely tight load and line regulation

• Very low temperature coefficient

• Current and thermal limiting

• Zero OFF mode current

• Logic-controlled electronic shutdown

• Available in 8-lead SOIC, MM8™ 8-lead MSOP, 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

Typical Application

Ordering Information

Part Number Voltage Accuracy Junction Temp. Range* Package

MIC5200-3.0BM 3.0 1% –40°C to +125°C SO-8 MIC5200-3.3BM 3.3 1% –40°C to +125°C SO-8 MIC5200-4.8BM 4.85 1% –40°C to +125°C SO-8 MIC5200-5.0BM 5.0 1% –40°C to +125°C SO-8 MIC5200-3.3BMM 3.3V 1% –40°C to +125°C MSOP-8 MIC5200-5.0BMM 5.0V 1% –40°C to +125°C MSOP-8 MIC5200-3.0BS 3.0 1% –40°C to +125°C SOT-223 MIC5200-3.3BS 3.3 1% –40°C to +125°C SOT-223 MIC5200-4.8BS 4.85 1% –40°C to +125°C SOT-223 MIC5200-5.0BS 5.0 1% –40°C to +125°C SOT-223

Other voltages available. Contact Micrel for details.

MIC5200-3.3

utput

1µF

Enable

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MIC5200 Micrel

Pin Configuration

OUT IN OUT

GND

IN NC EN

MIC5200-x.xBM

123

IN GND OUT

(SO-8)

MIC5200-x.xBMM

(MSOP-8)

MIC5200-x.xBS

(SOT-223)

EN may be tied directly to V

Pin Description

Pin Number Pin Number Pin Name Pin Function

SOT-223 SO-8, MSOP-8

3 1, 2 OUT Output: Pins 1 and 2 must be externally connected together.

3, 6 NC (not internally connected): Connect to ground plane for lowest thermal

resistance.

2, TAB 4 GND Ground: Ground pin and TAB are internally connected.

5 EN Enable/Shutdown (Input): TTL compatible input. High = enabled;

low = shutdown.

1 7, 8 IN Supply Input: Pins 7 and 8 must be extenally connected together.

Absolute Maximum Ratings

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

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

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

Input Supply Voltage................................................ –20V to +60V

Enable Input Voltage................................................ –20V to +60V

Thermal Characteristics

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

SO-8 (θJA) ..................................................................... See Note 1

Recommended Operating Conditions

Input Voltage ............................................................... 2.5V to 26V

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

Enable Input Voltage.................................................... –20V to V

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device beyond its specified Operating Ratings.

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MIC5200 Micrel

Electrical Characteristics

Limits in standard typeface are for TJ = 25°C and limits in boldface apply over the junction temperature range of –40°C to +125°C. Unless otherwise specified, V

Symbol Parameter Conditions Min Typical Max Units

Output Voltage Variation from specified V Accuracy –2 2

∆V

Output Voltage (Note 2) 40 150 ppm/°C

∆T Temperature Coef. ∆V

V ∆V

OUT

Line Regulation VIN = V

Load Regulation IL = 0.1mA to 100mA (Note 3) 0.04 0.16 %

= V

+ 1V, IL = 1mA, CL = 3.3µF, and V

OUT

+ 1 V to 26V 0.004 0.10 %

OUT

ENABLE

OUT

≥ 2.0V

–1 1 %

0.40

0.30

VIN – V

GND

Dropout Voltage IL = 100µA17mV

(Note 4) I

Quiescent Current V Ground Pin Current V

= 20mA 130

= 30mA 150

= 50mA 190

IL = 100mA 230 350

≤ 0.7V (Shutdown) 0.01 10 µA

ENABLE

≥ 2.0V, IL = 100µA 130 µA

ENABLE

= 20mA 270 350

= 30mA 330

= 50mA 500

IL = 100mA 1000 1500 PSRR Ripple Rejection 70 dB I

GNDDO

Ground Pin VIN = 0.5V less than specified V

OUT

270 330 µA

Current at Dropout IL = 100µA (Note 5)

LIMIT

∆V ∆P

O D

Current Limit V

= 0V 100 250 mA

OUT

Thermal Regulation (Note 6) 0.05 %/W

Output Noise 100 µV

ENABLE Input

Input Voltage Level

Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not

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

Note 4: Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value

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

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

Logic Low OFF 0.7 V Logic High ON 2.0

ENABLE Input Current VIL ≤ 0.7V 0.01 1 µA

VIH ≥ 2.0V 15 50

apply when operating the device outside of its rated operating conditions. The maximum allowable power dissipation is a function of the maximum junction temperature, T temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P (T

J(MAX)–TA

regulator will go into thermal shutdown. The θJC of the MIC5200-xxBS is 15°C/W and θJA for the MIC5200BM is 160°C/W

) ÷ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the

, the junction-to-ambient thermal resistance, θJA, and the ambient

J (MAX)

(MAX)

mounted on a PC board (see “Thermal Considerations” section for further details).

in the load range from 0.1mA to 100mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

measured at 1V differential.

is the sum of the load current plus the ground pin current.

load or line regulation effects. Specifications are for a 100mA load pulse at V

= 26V for t = 10ms.

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MIC5200 Micrel

Typical Characteristics

Dropout Voltage

vs. Output Current

250

200

150

100

DROPOUT VOLTAGE (mV)

0.01 0.1 1 10 100 1000

OUTPUT CURRENT (mA)

Ground Current

vs. Output Current

GROUND CURRENT (mA)

0.1

0.01 0.1 1 10 100

OUTPUT CURRENT (mA)

Dropout Voltage

0.4

0.3

0.2

0.1

DROPOUT VOLTAGE (V)

0.0

vs. Temperature

IL = 100mA

IL = 1mA

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Ground Current

vs. Supply Voltage

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

GROUND CURRENT (mA)

0.0 0246810

SUPPLY VOLTAGE (V)

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

OUT

OUTPUT CURRENT (A)

Ground Current

0.30

0.25

0.20

GROUND CURRENT (mA)

0.15

vs. Temperature

= 100µA

LOAD

= 2.2µF

= 4.7µF

OUT

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Output Voltage vs. Temp.

3.6

3.5

3.4

3.3

3.2

3.1

OUTPUT VOLTAGE (V)

3.0

(3.3V Version)

CIN = 2.2µF

= 4.7µF

OUT

3 DEVICES:

HI / AVG / LO

CURVES APPLICABLE

AT 100µA AND 100mA

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Ground Current

1.5

1.4

1.3

1.2

1.1

GROUND CURRENT (mA)

1.0

vs. Temperature

= 100mA

LOAD

= 2.2µF

= 4.7µF

OUT

-50 0 50 100 150

TEMPERATURE (°C)

Output Current

300 280 260 240 220 200 180 160 140

OUTPUT CURRENT (mA)

120 100

vs. Temperature

= 3.3V

OUT

= 0V

OUT

(SHORT CIRCUIT)

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

Thermal Regulation

100

∆ OUTPUT (mV)

200

-50

100

LOAD (mA)

-100

(3.3V Version)

-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

OUT

= 1mA

LOAD

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

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MIC5200 Micrel

-30

-20

-10

∆ OUTPUT (mV)

100

200

300

-2 0246810

OUTPUT (mA)

TIME (ms)

-10

-5

∆ OUTPUT (mV)

-0.2 0 0.2 0.4 0.6 0.8

INPUT (V)

TIME (ms)

-1

OUTPUT (V)

-2

-50 0 50 100 150 200 250 300

ENABLE (V)

TIME (µs)

-5

-60 -30 0 30 60 90 120 150

ENABLE CURRENT (µA)

TEMPERATURE (°C)

Short Circuit Current

300

250

200

150

100

SHORT CIRCUIT CURRENT (mA)

vs. Input Voltage

CIN = 2.2µF

= 4.7µF

OUT

= 3.3V

1234567

OUT

INPUT VOLTAGE (V)

Supply Current vs. Supply

Voltage (3.3V Version)

120

100

SUPPLY CURRENT (mA)

012345678910

SUPPLY VOLTAGE (V)

RL = 33Ω

Load Transient

CL = 4.7µF

Line Transient

CL = 1 µF

= 1mA

Load Transient

20 10

-10

-20

∆ OUTPUT (mV)

300

-30

200

100

OUTPUT (mA)

-10 0 10203040

15 10

5 0

∆ OUTPUT (mV)

-5

INPUT (V)

-0.1 0 0.1 0.2 0.3 0.4 0.5 0.6

CL = 47µF

TIME (ms)

Line Transient

CL = 10 µF

= 1mA

TIME (ms)

Supply Current vs. Supply

Voltage (3.3V Version)

SUPPLY CURRENT (mA)

01234567

SUPPLY VOLTAGE (V)

1000

0.01

OUTPUT IMPEDANCE (Ω)

0.001

Output Impedance

100

IL = 100µA

0.1

1x10

RL = 66Ω

IL = 1mA

IL = 100mA

100x10

1x10

10x10

FREQUENCY (Hz)

10x10

100x10

1x10

Enable Transient

(3.3V Version)

CL = 4.7 µF

= 1mA

Enable Current Threshold

vs. Temperature

CIN = 2.2µF

= 4.7µF

OUT

VEN = 5V

VEN = 2V

Enable Transient

(3.3V Version)

5 4 3 2 1 0

OUTPUT (V)

-1

ENABLE (V)

-2

-50 0 50 100 150 200 250 300

CL = 4.7 µF

= 100mA

TIME (µs)

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

OUT

-60 -30 0 30 60 90 120 150

TEMPERATURE (°C)

OFF

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MIC5200 Micrel

Ripple

10x10

vs. Frequency

IL = 100µA

1x10

100x10

FREQUENCY (Hz)

100

RIPPLE VOLTAGE (dB)

10x10

100x10

1x10

100

RIPPLE VOLTAGE (dB)

10x10

vs. Frequency

100x10

FREQUENCY (Hz)

External Capacitors

A 1µF capacitor is recommended between the MIC5200 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 tantalum capacitors 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 1 mA. A 1µF capacitor should be placed from the MIC5200 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.

The MIC5200 will remain stable and in regulation with no load in addition to the internal voltage divider, unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications.

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.

Ripple

IL = 1mA

1x10

10x10

100x10

1x10

100

RIPPLE VOLTAGE (dB)

10x10

Ripple

vs. Frequency

IL = 100mA

1x10

100x10

FREQUENCY (Hz)

10x10

100x10

Thermal ConsiderationsApplications Information

Part I. Layout

The MIC5200-xxBM (8-pin surface mount package) has the following thermal characteristics when mounted on a single layer copper-clad printed circuit board.

PC Board θ Dielectric

FR4 160°C/W

Ceramic 120°C/W

Multi-layer 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.

Part II. Nominal Power Dissipation and Die Temperature

The MIC5200-xxBM 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 MIC5200-xxBS (SOT-223 package) heat sink characteristics, please refer to Micrel Application Hint 17, “Calculating P.C. Board Heat Sink Area for Surface Mount Packages”.

1x10

ENABLE Input

The MIC5200 features nearly zero OFF mode current. When the ENABLE input is held below 0.7V, all internal circuitry is powered off. Pulling this pin high (over 2.0V) re-enables the device and allows operation. The ENABLE pin requires a small amount of current, typically 15µA. While the logic threshold is TTL/CMOS compatible, ENABLE may be pulled as high as 30V, independent of the voltage on VIN.

July 1998 3-128

50 mil

245 mil

30 mil 50 mil

150 mil

Minimum recommended board pad size, SO-8.