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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
low-noise performance (8-pin 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-pin Micrel
Mini 8™ 8-pin MSOP (micro small-outline package).
For low-dropout regulators that are stable with ceramic
output capacitors, see the µCap MIC5245/6/7 family.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
•
Error flag indicates undervoltage fault
High output voltage accuracy
Guaranteed 150mA output
Ultra-low-noise output (8-pin 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 V
CC
and V
PP
regulation/switching
Consumer/personal electronics
SMPS post-regulator/dc-to-dc modules
High-efficiency linear power supplies
Typical Application
SOT-23-5 Fixed Voltage Application
Micrel Mini 8 is a trademark of Micrel, Inc.
Adjustable Voltage Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2006
M9999-051506
(408) 955-1690
Micrel, Inc.
MIC5206
Ordering Information
Part Number
Standard
MIC5206-2.5BM5
MIC5206-2.7BM5
MIC5206-3.0BM5
MIC5206-3.2BM5
MIC5206-3.3BM5
MIC5206-3.6BM5
MIC5206-3.8BM5
MIC5206-4.0BM5
MIC5206-5.0BM5
MIC5206BMM
MIC5206-3.0BMM
MIC5206-3.3BMM
MIC5206-3.6BMM
MIC5206-3.8BMM
MIC5206-4.0BMM
MIC5206-5.0BMM
Marking
LD25
LD27
LD30
LD32
LD33
LD36
LD38
LD40
LD50
Pb-Free
MIC5206-2.5YM5
MIC5206-2.7YM5
MIC5206-3.0YM5
MIC5206-3.2YM5
MIC5206-3.3YM5
MIC5206-3.6YM5
MIC5206-3.8YM5
MIC5206-4.0YM5
MIC5206-5.0YM5
MIC5206YMM
MIC5206-3.0YMM
MIC5206-3.3YMM
MIC5206-3.6YMM
MIC5206-3.8YMM
MIC5206-4.0YMM
MIC5206-5.0YMM
Marking
LD25
LD27
LD30
LD32
LD33
LD36
LD38
LD40
LD50
Voltage*
2.5V
2.7V
3.0V
3.2V
3.3V
3.6V
3.8V
4.0V
5.0V
ADJ
3.0V
3.3V
3.6V
3.8V
4.0V
5.0V
Junction Temp. Range
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
Package
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
* Other voltages available. Contact Micrel for details.
May 2006
2
M9999-051506
(408) 955-1690
Micrel, Inc.
MIC5206
Pin Configuration
MIC5206-xxBM5/YM5
(Fixed Output Voltage)
MIC5206-xxBMM/YMM
(Fixed Output Voltage)
MIC5206-BMM/YMM
(Adjustable Output Voltage)
Pin Description
Pin Number
SOT-23-5
1
2
3
4
Pin Number
MSOP-8
8
4, 6
7
3
5 (fixed)
5 (adj.)
5
1, 2
Pin Name
IN
GND
EN
FLAG
BYP
ADJ
OUT
Pin Function
Supply Input
Ground
Enable/Shutdown (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown. Do not leave floating.
Error Flag (Output): Open-collector output. Active low indicates an output
undervoltage condition
Reference Bypass: Connect external 470pF capacitor to GND to reduce output
noise. May be left open
Adjust (Input): Adjustable regulator feedback input. Connect to resistor voltage
divider.
Regulator Output
May 2006
3
M9999-051506
(408) 955-1690
Micrel, Inc.
MIC5206
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
).............................. –20V to +20V
Enable Input Voltage (V
EN
)............................. –20V to +20V
Power Dissipation (P
D
) .......................... Internally Limited
(3)
Junction Temperature (T
J
) ........................–40°C to +125°C
Lead Temperature (soldering, 5 sec)......................... 260°C
Operating Ratings
(2)
Supply Input Voltage (V
IN
)............................. +2.5V to +16V
Enable Input Voltage (V
EN
)..................................... 0V to V
IN
Junction Temperature ............................... –40°C to +125°C
SOT-23-5 (θ
JA
)
(3)
MSOP-8 (θ
JA
)
(3)
Electrical Characteristics
V
IN
= V
OUT
+ 1V; I
L
= 100µA; C
L
= 1.0µF; V
EN
≥
2.0V; T
J
= 25°C,
bold
values indicate –40°C < T
J
< +125°C, unless noted.
Symbol
V
O
∆V
O
/∆T
∆V
O
/V
O
∆V
O
/V
O
V
IN
–
V
O
Parameter
Output Voltage Accuracy
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation
Dropout Voltage,
Note 6
Condition
Variation from nominal V
OUT
Note 4
V
IN
= V
OUT
+ 1V to 16V
I
L
= 0.1mA to 150mA,
Note 5
I
L
= 100µA
I
L
= 50mA
I
L
= 100mA
I
L
= 150mA
I
GND
I
GND
Quiescent Current
Ground Pin Current,
Note 7
V
EN
≤
0.4V (shutdown)
V
EN
≤
0.18V (shutdown)
V
EN
≥
2.0V, I
L
= 100µA
I
L
= 50mA
I
L
= 100mA
I
L
= 150mA
PSRR
I
LIMIT
∆V
O
/∆P
D
e
no
Ripple Rejection
Current Limit
Thermal Regulation
Output Noise
V
OUT
= 0V
Note 8
I
L
= 50mA, C
L
= 4.7µF, 470pF from BYP to
GND (MM package only)
Regulator shutdown
Regulator enable
V
IL
≤
0.4V
V
IL
≤
0.18V
V
IH
≥
2.0V
V
IH
≥
2.0V
2.0
0.01
5
–1
–2
20
25
17
110
140
165
0.01
80
350
600
1300
75
320
0.05
260
500
50
70
150
230
250
300
275
350
1
5
125
150
600
800
1000
1500
1900
2500
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
dB
mA
%/W
nV√Hz
Min
–1
–2
40
Typ
Max
1
2
Units
%
%
ppm/°C
Enable Input
V
IL
V
IH
I
IL
I
IH
Enable Input Logic-Low Voltage
Enable Input Logic-High
Voltage
Enable Input Current
0.4
0.18
V
V
V
µA
µA
µA
µA
May 2006
4
M9999-051506
(408) 955-1690
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