MICREL MIC5206 Datasheet

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

PP

Typical Applications

47k

MIC5206BMM

V

Enable

Shutdown

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

MIC5206-x.xBM5

IN

15
2
34

V

100k

Flag Output
(optional)

OUT

C

OUT

1µF tantalum

V

OUT

Flag Output

(optional)

tantalum

1µF

1
2
3
4

R1

R2

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 [phone] • fax + 1 [phone] • http://www.micrel.com

January 2000 1 MIC5206

8

V

7
6
5

IN

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

Enable
Shutdown

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

EN

GND

2

IN

13

LDxx

45

OUTFLAG

MIC5206-xxBM5

(Fixed Output Voltage)

1

OUT

2

OUT

GND

3
4

FLAG

MIC5206-x.xBMM

(Fixed Output Voltage)

8

IN

7

EN

6

GND
BYP

5

FLAG

OUT
OUT

GND

1
2
3
4

MIC5206BMM

(Adjustable Ouput Voltage)

8

IN

7

EN

6

GND
ADJ

5

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

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

IN

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

EN

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

D

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

JA

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

IN

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

EN

Electrical Characteristics

VIN = V

Symbol Parameter Conditions Min Typical Max Units

V

O

∆V

O

∆VO/V
∆VO/V

V

– V

IN

I

GND

I

GND

PSRR Ripple Rejection 75 dB
I

LIMIT

∆VO/∆P
e

no

Enable Input

V

IL

V

IH

I

IL

I

IH

Error Flag Output

V

ERR

V

OL

I

FL

+ 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

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

I

L

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

I

L

1500 µA

IL = 150mA 1300 1900 µA

2500 µA

Current Limit V

D

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

V

IL

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

IN

January 2000 3 MIC5206