Datasheet MIC5206 Datasheet (MICREL)

Page 1

MIC5206 Micrel

MIC5206

150mA Low-Noise LDO Regulator

General Description

The MIC5206 is an efficient linear voltage regulator with very low dropout voltage (typically 17mV at light loads and 165mV at 150mA), and very low ground current (600µA at 100mA output), with better than 1% initial accuracy. It has a logic compatible enable/shutdown control input and an internal undervoltage monitor.

Designed especially for hand-held, battery-powered devices, the MIC5206 can be switched by a CMOS or TTL compatible logic signal. When disabled, power consumption drops nearly to zero. Dropout ground current is minimized to prolong battery life.

Key features include an undervoltage monitor with an error flag output, a reference bypass pin to improve its already lownoise performance (8-lead versions only), reversed-battery protection, current limiting, and overtemperature shutdown.

The MIC5206 is available in several fixed voltages in a tiny SOT-23-5 package. It features a pinout, similar to the LP2980, but has significantly better performance. Fixed and adjustable output voltage versions, featuring the reference bypass option, are available in the 8-lead Micrel Mini 8™ 8-lead MSOP (micro small-outline package).

For low-dropout regulators that are stable with ceramic output capacitors, see the µCap MIC5245/6/7 family.

Features

• Error flag indicates undervoltage fault

• High output voltage accuracy

• Guaranteed 150mA output

• Ultra-low-noise output (8-lead versions)

• Low quiescent current

• Low dropout voltage

• Extremely tight load and line regulation

• Very low temperature coefficient

• Current and thermal limiting

• Reversed-battery protection

•“Zero” off-mode current

• Logic-controlled electronic enable

Applications

• Cellular telephones

• Laptop, notebook, and palmtop computers

• Battery-powered equipment

• PCMCIA VCC and V

• Consumer/personal electronics

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

• High-efficiency linear power supplies

regulation/switching

Typical Applications

47k

MIC5206BMM

Enable

Shutdown

Enable (pin 3) may be connected directly to Supply Input (pin 1).

MIC5206-x.xBM5

15 2 34

100k

Flag Output (optional)

OUT

1µF tantalum

OUT

Flag Output

(optional)

tantalum

1µF

1 2 3 4

SOT-23-5 Fixed Voltage Application Adjustable Voltage Application

Micrel Mini 8™ is a trademark of Micrel, Inc.

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

January 2000 1 MIC5206

7 6 5

Enable (pin 7) may be connected directly to Supply Input (pin 8).

Enable Shutdown

Page 2

MIC5206 Micrel

Ordering Information

Part Number Marking Volts Accuracy Junction Temp. Range Package

MIC5206-2.5BM5 LD25 2.5 1% –40°C to +125°C SOT-23-5 MIC5206-2.7BM5 LD27 2.7 1% –40°C to +125°C SOT-23-5 MIC5206-3.0BM5 LD30 3.0 1% –40°C to +125°C SOT-23-5 MIC5206-3.2BM5 LD32 3.2 1% –40°C to +125°C SOT-23-5 MIC5206-3.3BM5 LD33 3.3 1% –40°C to +125°C SOT-23-5 MIC5206-3.6BM5 LD36 3.6 1% –40°C to +125°C SOT-23-5 MIC5206-3.8BM5 LD38 3.8 1% –40°C to +125°C SOT-23-5 MIC5206-4.0BM5 LD40 4.0 1% –40°C to +125°C SOT-23-5 MIC5206-5.0BM5 LD50 5.0 1% –40°C to +125°C SOT-23-5 MIC5206BMM — Adj 1% –40°C to +125°C 8-lead MSOP MIC5206-3.0BMM — 3.0 1% –40°C to +125°C 8-lead MSOP MIC5206-3.3BMM — 3.3 1% –40°C to +125°C 8-lead MSOP MIC5206-3.6BMM — 3.6 1% –40°C to +125°C 8-lead MSOP MIC5206-3.8BMM — 3.8 1% –40°C to +125°C 8-lead MSOP MIC5206-4.0BMM — 4.0 1% –40°C to +125°C 8-lead MSOP MIC5206-5.0BMM — 5.0 1% –40°C to +125°C 8-lead MSOP

Other voltages available. Contact Micrel for details.

Pin Configuration

GND

LDxx

OUTFLAG

MIC5206-xxBM5

(Fixed Output Voltage)

OUT

GND

3 4

FLAG

MIC5206-x.xBMM

(Fixed Output Voltage)

GND BYP

FLAG

OUT OUT

GND

1 2 3 4

MIC5206BMM

(Adjustable Ouput Voltage)

GND ADJ

Pin Description

MIC5206 MIC5206 Pin Name Pin Function

SOT-23-5 MSOP-8

1 8 IN Supply Input 2 4, 6 GND Ground 3 7 EN Enable/Shutdown (Input): CMOS compatible input. Logic high = enable,

logic low or open = shutdown. Do not leave floating.

4 3 FLAG Error Flag (Output): Open-collector output. Active low indicates an ouput

undervoltage condition.

5 (fixed) BYP Reference Bypass: Connect external 470pF capacitor to GND to reduce

output noise. May be left open.

5 (adj.) ADJ Adjust (Input): Adjustable regulator feedback input. Connect to resistor

voltage divider.

5 1,2 OUT Regulator Output

MIC5206 2 January 2000

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MIC5206 Micrel

Absolute Maximum Ratings (Note 1)

Supply Input Voltage (V Enable Input Voltage (V Power Dissipation (P

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

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

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

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

) ............... Internally Limited, Note 3

Operating Ratings (Note 2)

Supply Input Voltage (V Enable Input Voltage (V

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

SOT-23-5 (θJA).........................................................Note 3

8-lead MSOP (θ

) ................................................... Note 3

) ........................... +2.5V to +16V

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

Electrical Characteristics

VIN = V

Symbol Parameter Conditions Min Typical Max Units

∆V

∆VO/V ∆VO/V

– V

GND

PSRR Ripple Rejection 75 dB I

LIMIT

∆VO/∆P e

Enable Input

Error Flag Output

ERR

+ 1V; IL = 100µA; CL = 1.0µF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.

OUT

Output Voltage Accuracy variation from nominal V

OUT

–11% –22%

/∆T Output Voltage Note 4 40 ppm/°C

Temperature Coefficient

O O

Line Regulation VIN = V Load Regulation IL = 0.1mA to 150mA, Note 5 0.02 0.2 % Dropout Voltage, Note 6 IL = 100µA1750mV

+ 1V to 16V 0.004 0.012 % / V

OUT

70 mV

IL = 50mA 110 150 mV

230 mV

= 100mA 140 250 mV

300 mV

IL = 150mA 165 275 mV

350 mV

Quiescent Current VEN ≤ 0.4V (shutdown) 0.01 1 µA

VEN ≤ 0.18V (shutdown) 5 µA

Ground Pin Current, Note 7 VEN ≥ 2.0V, IL = 100µA80125µA

150 µA

IL = 50mA 350 600 µA

800 µA

= 100mA 600 1000 µA

1500 µA

IL = 150mA 1300 1900 µA

2500 µA

Current Limit V

Thermal Regulation Note 8 0.05 %/W Output Noise IL = 50mA, CL = 4.7µF, 470pF from BYP 260

= 0V 320 500 mA

OUT

nV Hz

to GND (MM package only)

Enable Input Logic-Low Voltage regulator shutdown 0.4 V

0.18 V Enable Input Logic-High Voltage regulator enabled 2.0 V Enable Input Current VIL ≤ 0.4V 0.01 –1 µA

≤ 0.18V –2 µA

VIH ≥ 2.0V 5 20 µA VIH ≥ 2.0V 25 µA

Flag Threshold undervoltage condition (below nominal) –2 –6 –10 %

Note 9

Output Logic-Low Voltage IL = 1mA, undervoltage condition 0.2 0.4 V Flag Leakage Current flag off, V

= 0V to 16V –1 0.1 +1 µA

FLAG

January 2000 3 MIC5206

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MIC5206 Micrel

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 T

allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The θ

(ambient temperature) is P

MIC5205-x.xBM5 (all versions) is 220°C/W, and the MIC5206-x.xBMM (all versions) is 200°C/W, mounted on a PC board (see “Thermal Considerations” for further details).

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

range from 0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

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

differential.

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

the load current plus the ground pin current.

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

regulation effects. Specifications are for a 150mA load pulse at VIN = 16V for t = 10ms.

Note 9: The error flag comparator includes 3% hysteresis.

D(max)

= (T

– TA) ÷ θJA. Exceeding the maximum

J(max)

of the

Typical Characteristics

Power Supply

Rejection Ratio

-20

-40

-60

PSRR (dB)

-80

-100

1E+11E+21E+31E+41E+51E+61E+7

100

FREQUENCY (Hz)

Power Supply

Rejection Ratio

-20

-40

-60

PSRR (dB)

-80

-100

1E+11E+21E+31E+41E+51E+61E+7

100

FREQUENCY (Hz)

10k

I C

OUT

100k

OUT

100k

VIN = 6V V

= 5V

OUT

= 100µA

= 1µF

VIN = 6V V

= 5V

OUT

= 1mA

= 1µF

10M

Power Supply

Rejection Ratio

VIN = 6V V

-20

-40

-60

PSRR (dB)

-80

-100

= 5V

OUT

= 100µA

OUT

= 2.2µF

OUT

= 0.01µF

BYP

1E+11E+21E+31E+41E+51E+61E+7

100

10k

FREQUENCY (Hz)

100k

Power Supply

Rejection Ratio

VIN = 6V V

-20

-40

-60

PSRR (dB)

-80

-100

= 5V

OUT

= 1mA

OUT

= 2.2µF

OUT

= 0.01µF

BYP

1E+11E+21E+31E+41E+51E+61E+7

100

10k

FREQUENCY (Hz)

100k

10M

Power Supply Ripple Rejection

vs. Voltage Drop

1mA

RIPPLE REJECTION (dB)

10mA

= 100mA

OUT

= 1µF

OUT

0 0.1 0.2 0.3 0.4

VOLTAGE DROP (V)

Power Supply Ripple Rejection

100

RIPPLE REJECTION (dB)

vs. Voltage Drop

90 80

1mA 70 60 50 40

10mA 30 20 10

0 0.1 0.2 0.3 0.4

VOLTAGE DROP (V)

OUT

BYP

= 100mA

OUT

= 2.2µF

= 0.01µF

MIC5206 4 January 2000

Page 5

MIC5206 Micrel

√

0.0001

0.001

0.01

0.1

1E+11E+21E+31E+41E+51E+6 1E+7

NOISE (µV/√Hz)

FREQUENCY (Hz)

√

0.0001

0.001

0.01

0.1

1E+11E+21E+31E+41E+51E+6 1E+7

NOISE (µV/√Hz)

FREQUENCY (Hz)

Typical Characteristics

Power Supply

Rejection Ratio

VIN = 6V V

OUT

= 5V

-20

-40

-60

PSRR (dB)

-80

-100

1E+11E+21E+31E+41E+51E+61E+7

100

FREQUENCY (Hz)

= 10mA

OUT

= 1µF

OUT

10k

100k

Power Supply

Rejection Ratio

VIN = 6V V

-20

-40

-60

PSRR (dB)

-80

-100

= 5V

OUT

= 100mA

OUT

= 1µF

OUT

1E+11E+21E+31E+41E+51E+61E+7

100

10k

FREQUENCY (Hz)

100k

10M

Power Supply

Rejection Ratio

VIN = 6V V

OUT

= 5V

-20

-40

-60

PSRR (dB)

-80

-100

1E+11E+21E+31E+41E+51E+61E+7

100

FREQUENCY (Hz)

= 10mA

OUT

= 2.2µF

OUT

= 0.01µF

BYP

10k

100k

Power Supply

Rejection Ratio

VIN = 6V V

-20

-40

-60

PSRR (dB)

-80

-100

= 5V

OUT

= 100mA

OUT

= 2.2µF

OUT

= 0.01µF

BYP

1E+11E+21E+31E+41E+51E+61E+7

100

10k

FREQUENCY (Hz)

100k

10M

Turn-On Time

vs. Bypass Capacitance

10000

1000

TIME (µs)

100

10 100 1000 10000

CAPACITANCE (pF)

Noise Performance

0.1

0.01

NOISE (µV/√Hz)

0.001

0.0001

1E+11E+21E+31E+41E+51E+61E+7

10mA, C

1mA

= 1µF

OUT

= 10nF

BYP

100

FREQUENCY (Hz)

10k 100k 1M 10M

OUT

= 1µF

= 5V

Noise Performance

Hz)

0.1

100mA

0.01

NOISE (µV/

= 5V

OUT

0.001

= 10µF

OUT

electrolytic

0.0001

1E+11E+21E+31E+41E+51E+6 1E+7

100

FREQUENCY (Hz)

1mA

10k 100k1M10M

10mA

Noise Performance

100mA

= 5V

OUT

= 22µF

OUT

tantalum C

= 10nF

BYP

100

10mA

1mA

10k 100k1M10M

Noise Performance

Hz)

0.1

0.01

= 5V

NOISE (µV/

0.0001

OUT

= 10µF

OUT

0.001

electrolytic C

= 100pF

BYP

1E+11E+21E+31E+41E+51E+6 1E+7

100

FREQUENCY (Hz)

1mA

10mA

10k 100k1M10M

100mA

Dropout Voltage

Noise Performance

Hz)

0.1

0.01

NOISE (µV/

0.001

0.0001

= 5V

OUT

= 10µF

OUT

electrolytic C

= 1nF

BYP

1E+11E+21E+31E+41E+51E+6 1E+7

100

FREQUENCY (Hz)

10mA

100mA

1mA

10k 100k1M10M

Noise Performance

= 5V

OUT

= 10µF

OUT

electrolytic C

= 1nF

BYP

100

10mA

100mA

1mA

DROPOUT VOLTAGE (mV)

10k 100k1M10M

vs. Output Current

320 280 240 200

+125°C

+25°C

160 120

80 40

0 40 80 120 160

OUTPUT CURRENT (mA)

–40°C

January 2000 5 MIC5206

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MIC5206 Micrel

Applications Information

Enable/Shutdown

Forcing EN (enable/shutdown) high (> 2V) enables the regulator. EN is compatible with CMOS logic gates.

If the enable/shutdown feature is not required, connect EN (enable) to IN (supply input). Refer to the text with Figures 1a and 2.

Input Capacitor

A 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 if a battery is used as the input.

Reference Bypass Capacitor

BYP (reference bypass) is connected to the internal voltage reference. A 470pF capacitor (C GND quiets this reference, providing a significant reduction in output noise. See Figure 2. C margin; when using C

BYP

, output capacitors of 2.2µF or

BYP

greater are generally required to maintain stability. The start-up speed of the MIC5206 is inversely proportional

to the size of the reference bypass capacitor. Applications requiring a slow ramp-up of output voltage should consider larger values of C consider omitting C

. Likewise, if rapid turn-on is necessary,

BYP

If output noise is not a major concern, omit C BYP open.

Output Capacitor

An output capacitor is required between OUT and GND to prevent oscillation. The minimum size of the output capacitor is dependent upon whether a reference bypass capacitor is used. 1.0µF minimum is recommended when C used (see Figure 2). 2.2µF minimum is recommended when C

is 470pF (see Figure 2). Larger values improve the

BYP

regulator’s transient response. The output capacitor value may be increased without limit.

The output capacitor should have an ESR (effective series resistance) of about 5Ω or less and a resonant frequency above 1MHz. Most tantalum or aluminum electrolytic capacitors are adequate; film types will work, but are more expensive. Since many aluminum electrolytics have electrolytes that freeze at about –30°C, solid tantalums are recommended for operation below –25°C.

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.

No-Load Stability

The MIC5205 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.

Error Flag Ouput

The error flag is an open-collector output and is active (low) when an undervoltage of approximately 5% below the nominal output voltage is detected. A pullup resistor from IN to FLAG is shown in all schematics.

) connected from BYP to

BYP

reduces the regulator phase

and leave

BYP

is not

BYP

If an error indication is not required, FLAG may be left open and the pullup resistor may be omitted.

Enable Pin Ramp and the Error Flag

To prevent indeterminate behavior on the error flag during power down of the device, ensure that the fall time of the enable pin signal, from logic high to logic low, is faster than 100µs.

Fixed Regulator Applications

MIC5206-x.xBM5

EN (pin 3) may be connected directly to IN (pin 1).

15 2 34

100k

Error Flag

OUT

1µF

Figure 1a. Low-Noise Fixed Voltage Application

EN (pin 3) is shown connected to IN (pin 1) for an application where enable/shutdown is not required. The error flag is shown with a 100kΩ pullup resistor.

OUT

Flag Output

(optional)

1µF

47k

2 3 4

MIC5206-x.xBMM

7 6 5

Enable

Figure 1b. Low-Noise Fixed Voltage Application

Figure 1b is an example of a basic configuration where the lowest-noise operation is not required. C

= 1µF minimum.

OUT

The error flag is shown with a 47kΩ pullup resistor.

Ultra-Low-Noise Application

OUT

Flag Output

(optional)

2.2µF

1 2 3 4

MIC5206-x.xBMM

47k

BYP

8 7 6 5

BYP

470pF

Figure 2. Ultra-Low-Noise Fixed Voltage Application

Figure 2 includes a 470pF capacitor for low-noise operation and shows EN (pin 7) connected to IN (pin 8) for an application where enable/shutdown is not required. The error flag is shown with a 47kΩ pullup resistor.

Adjustable Regulator Applications

Figure 3 shows the MIC5206BMM adjustable output voltage configuration. Two resistors set the output voltage. The formula for output voltage is:

V = 1.242V

OUT

×+

 









MIC5206 6 January 2000

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MIC5206 Micrel

Resistor values are not critical because ADJ (adjust) has a high input impedance, but for best results use resistors of 470kΩ or less. A capacitor from ADJ to ground provides greatly improved noise performance.

OUT

Flag Output

(optional)

2.2µF

1 2 3 4

47k

ADJ

MIC5206BMM

8 7 6 5

BYP

470pF

Figure 3. Ultra-Low-Noise

Adjustable Voltage Application

Figure 3 also includes a 470pF capacitor for lowest-noise operation and shows EN (pin 7) connected to IN (pin 8) for an application where enable/shutdown is not required. C

OUT

2.2µF minimum. The error flag is shown with a 47kΩ pullup resistor.

Thermal Considerations

Layout

The MIC5206-x.xBM5 (5-lead SOT-23 package) has the following thermal characteristics when mounted on a single layer copper-clad printed circuit board.

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

PC Board Dielectric

θθ

FR4 220°C/W

Ceramic 200°C/W

SOT-23-5 Thermal Characteristics

The “worst case” value of 220°C/W assumes no ground plane, minimum trace widths, and a FR4 material board.

The MIC5206-xxBMM (8-lead MSOP) has a thermal resistance of 200°C/W when mounted on a FR4 board with minimum trace widths and no ground plane.

PC Board Dielectric

FR4 200°C

θθ

MSOP Thermal Characteristics

Nominal Power Dissipation and Die Temperature

The MIC5206-x.xBM5 at a 25°C ambient temperature will operate reliably at over 450mW power dissipation when mounted in the “worst case” manner described above. At an ambient temperature of 40°C, the device may safely dissipate over 380mW. These power levels are equivalent to a die temperature of 125°C, the maximum operating junction temperature for the MIC5206.

For additional heat sink characteristics, please refer to Micrel Application Hint 17, “Calculating P.C. Board Heat Sink Area For Surface Mount Packages”.

January 2000 7 MIC5206

Page 8

MIC5206 Micrel

Package Information

1.90 (0.075) REF

0.95 (0.037) REF

3.02 (0.119)

2.80 (0.110)

0.122 (3.10)

0.112 (2.84)

0.50 (0.020)

0.35 (0.014)

1.75 (0.069)

1.50 (0.059)

1.30 (0.051)

0.90 (0.035)

0.199 (5.05)

0.187 (4.74)

0.120 (3.05)

0.116 (2.95)

3.00 (0.118)

2.60 (0.102)

0.15 (0.006)

0.00 (0.000)

SOT-23-5 (M5)

10°

0°

DIMENSIONS:

MM (INCH)

0.20 (0.008)

0.09 (0.004)

0.60 (0.024)

0.10 (0.004)

DIMENSIONS:

INCH (MM)

0.036 (0.90)

0.032 (0.81)

0.012 (0.03)

0.0256 (0.65) TYP

0.008 (0.20)

0.004 (0.10)

0.043 (1.09)

0.038 (0.97)

0.012 (0.30) R

5° MAX

0° MIN

0.007 (0.18)

0.005 (0.13)

0.012 (0.03) R

0.039 (0.99)

0.035 (0.89)

0.021 (0.53)

8-Lead MSOP (MM)

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

TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 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.

MIC5206 8 January 2000