MICREL MIC5201 Datasheet

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

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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

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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

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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