MICREL MIC5209 Datasheet

MIC5209 Micrel

MIC5209

500mA Low-Noise LDO Regulator

General Description

The MIC5209 is an efficient linear voltage regulator with very
low dropout voltage, typically 10mV at light loads and less
than 500mV at full load, with better than 1% output voltage
accuracy.

Designed especially for hand-held, battery-powered devices,
the MIC5209 features low ground current to help prolong
battery life. An enable/shutdown pin on SO-8 and TO-263-5
versions can further improve battery life with near-zero shut­down current.

Key features include reversed-battery protection, current
limiting, overtemperature shutdown, ultra-low-noise capabil­ity (SO-8 and TO-263-5 versions), and availability in ther­mally efficient packaging. The MIC5209 is available in adjust­able or fixed output voltages.

For space-critical applications where peak currents do not
exceed 500mA, see the MIC5219.

Features

• Meets Intel® Slot 1 and Slot 2 requirements

• Guaranteed 500mA output over the full operating
temperature range

• Low 500mV maximum dropout voltage at full load

• Extremely tight load and line regulation

• Thermally-efficient surface-mount package

• Low temperature coefficient

• Current and thermal limiting

• Reversed-battery protection

• No-load stability

• 1% output accuracy

• Ultra-low-noise capability in SO-8 and TO-263-5

Applications

• Pentium II Slot 1 and Slot 2 support circuits

• Laptop, notebook, and palmtop computers

• Cellular telephones

• Consumer and personal electronics

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

• High-efficiency linear power supplies

Typical Applications

MIC5209-2.5BS

132

V

IN

≥ 3.0V

0.1µF

3.3V Nominal-Input Slot-1
Power Supply

ENABLE

SHUTDOWN

V

IN

6V

V

OUT

5V

2.2µF

tantalum

MIC5209-5.0BM

1
2
3
4

470pF

(OPTIONAL)

Ultra-Low-Noise 5V Regulator

22µF
tantalum

V

OUT

2.5V ±1%

8
7
6
5

Ordering Information

Part Number Voltage Junct. Temp. Range Package

MIC5209-2.5BS 2.5V –40°C to +125°C SOT-223
MIC5209-3.0BS 3.0V –40°C to +125°C SOT-223
MIC5209-3.3BS 3.3V –40°C to +125°C SOT-223
MIC5209-3.6BS 3.6V –40°C to +125°C SOT-223
MIC5209-4.2BS 4.2V –40°C to +125°C SOT-223
MIC5209-5.0BS 5.0V –40°C to +125°C SOT-223
MIC5209-1.8BM 1.8V 0°C to +125°C SO-8
MIC5209-2.5BM 2.5V –40°C to +125°C SO-8
MIC5209-3.0BM 3.0V –40°C to +125°C SO-8
MIC5209-3.3BM 3.3V –40°C to +125°C SO-8
MIC5209-3.6BM 3.6V –40°C to +125°C SO-8
MIC5209-5.0BM 5.0V –40°C to +125°C SO-8
MIC5209BM Adj. –40°C to +125°C SO-8
MIC5209-2.5BU 2.5V –40°C to +125°C TO-263-5
MIC5209-3.0BU 3.0V –40°C to +125°C TO-263-5
MIC5209-3.3BU 3.3V –40°C to +125°C TO-263-5
MIC5209-3.6BU 3.6V –40°C to +125°C TO-263-5
MIC5209-5.0BU 5.0V –40°C to +125°C TO-263-5
MIC5209BU Adj. –40°C to +125°C TO-263-5

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

August 2, 2000 1 MIC5209

MIC5209 Micrel

Pin Configuration

GND

TAB

132

IN OUTGND

MIC5209-x.xBS

EN

IN

OUT

BYP

1
2
3
4

GND

8

GND

7

GND

6

GND

5

SOT-223

Fixed Voltages

TAB

GND

5 BYP
4 OUT
3 GND
2IN
1EN

MIC5209-x.xBM

SO-8

TO-263-5

Fixed Voltages

Fixed Voltages

MIC5209-x.xBU

EN

1

IN

2

OUT

3

ADJ

4

MIC5209BM

Adjustable Voltage

SO-8

GND

8

GND

7

TAB

GND

6

GND

5

GND

5 ADJ
4 OUT
3 GND
2IN
1EN

MIC5209BU

TO-263-5

Adjustable Voltage

Pin Description

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

SOT-223 SO-8 TO-263-5

1 2 2 IN Supply Input

TAB 5–8 3 GND Ground: SOT-223 pin 2 and TAB are internally connected. SO-8 pins 5

2,

through 8 are internally connected.

3 3 4 OUT Regulator Output

1 1 EN Enable (Input): CMOS compatible control input. Logic high = enable; logic

low or open = shutdown.

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

output noise. May be left open. For 1.8V or 2.5V operation, see “Applica-
tions Information.”

4 (adj.) 5 (adj.) ADJ Adjust (Input): Feedback input. Connect to resistive voltage-divider network.

MIC5209 2 August 2, 2000

MIC5209 Micrel

Absolute Maximum Ratings (Note 1)

Supply Input Voltage (V
Power Dissipation (P
Junction Temperature (T

all except 1.8V......................................–40°C to +125°C

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

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

Storage Temperature (T

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

IN

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

D

)

J

) ....................... –65°C to +150°C

S

Operating Ratings (Note 2)

Supply Input Voltage (V
Enable Input Voltage (V
Junction Temperature (TJ)

all except 1.8V......................................–40°C to +125°C

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

Package Thermal Resistance .................................. Note 3

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

IN

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

EN

Electrical Characteristics

VIN = V
0°C ≤ TJ ≤ +125°C for 1.8V version; unless noted.

Symbol Parameter Conditions Min Typical Max Units

V

OUT

∆V

OUT

∆V

OUT/VOUT

∆V

OUT/VOUT

V

IN

I

GND

I

GND

PSRR Ripple Rejection f = 120Hz 75 dB
I

LIMIT

∆V

OUT

e

no

+ 1.0V; C

OUT

Output Voltage Accuracy variation from nominal V

= 4.7µF, I

OUT

= 100µA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C except

OUT

OUT

–11%
–2 2 %

/∆T Output Voltage Note 4 40 ppm/°C

Temperature Coefficient

– V

OUT

Line Regulation VIN = V

Load Regulation I

Dropout Voltage, Note 6 I

OUT

OUT

+ 1V to 16V 0.009 0.05 %/V

OUT

0.1 %/V

= 100µA to 500mA, Note 5 0.05 0.5 %

0.7 %

= 100µA1060mV

80 mV

I

= 50mA 115 175 mV

OUT

250 mV

I

= 150mA 165 300 mV

OUT

400 mV

I

= 500mA 350 500 mV

OUT

600 mV

Ground Pin Current, Notes 7, 8 VEN ≥ 3.0V, I

= 100µA80130µA

OUT

170 µA

V

≥ 3.0V, I

EN

= 50mA 350 650 µA

OUT

900 µA

V

≥ 3.0V, I

EN

= 150mA 1.8 2.5 mA

OUT

3.0 mA

V

≥ 3.0V, I

EN

= 500mA 8 20 mA

OUT

25 mA

Ground Pin Quiescent Current, VEN ≤ 0.4V (shutdown) 0.05 3 µA

Note 8

Current Limit V

VEN ≤ 0.18V (shutdown) 0.10 8 µA

= 0V 700 900 mA

OUT

1000 mA

/∆P

Thermal Regulation Note 9 0.05 %/W

D

Output Noise V
Note 10 C

OUT
OUT

I

= 50mA, C

OUT

= 2.5V, I
= 2.2µF, C

OUT

= 50mA, 500

= 0

BYP

= 2.2µF, C

OUT

= 470pF 300

BYP

nV/ Hz

nV/ Hz

IN

August 2, 2000 3 MIC5209

MIC5209 Micrel

ENABLE Input

V

ENL

I

ENL

I

ENH

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 calculated using: P

Note 4: Output voltage temperature coefficient is 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: VEN is the voltage externally applied to devices with the EN (enable) input pin. [SO-8 (M) and TO-263-5 (U) packages only.]
Note 9: Thermal regulation is the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line regulation

Note 10: C

Enable Input Logic-Low Voltage VEN = logic low (regulator shutdown) 0.4 V

0.18 V

VEN = logic high (regulator enabled) 2.0 V

Enable Input Current V

maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See Table 1
and the “Thermal Considerations” section for details.

range from 100µA to 500mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

differential.

the load current plus the ground pin current.

effects. Specifications are for a 500mA load pulse at VIN = 16V for t = 10ms.

is an optional, external bypass capacitor connected to devices with a BYP (bypass) or ADJ (adjust) pin. [SO-8 (M) and TO-263-5 (U)

BYP

packages only].

≤ 0.4V 0.01 –1 µA

ENL

V

≤ 0.18V 0.01 –2 µA

ENL

V

≥ 2.0V 5 20 µA

ENH

D(max)

= (T

– TA) ÷ θJA. Exceeding the

J(max)

25 µA

MIC5209 4 August 2, 2000