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
•
•
•
•
•
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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
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
Micrel, Inc.
MIC5206
Symbol
V
ERR
V
OL
I
FL
Notes:
Parameter
Flag Threshold
Output Logic-Low Voltage
Flag Leakage Current
Condition
Undervoltage condition (below nominal)
Note 9
I
L
= 1mA, undervoltage condition
Flag off, V
FLAG
= 0V to 16V
Min
–2
Typ
–6
0.2
Max
–10
0.4
+1
Units
%
V
µA
Error Flag Output
–1
0.1
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation at any T
A
(ambient temperature) is P
D(max)
= (T
J(max)
–T
A
) /
θ
JA
. Exceeding the maximum allowable power
dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The
θ
JA
of theMIC5205-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).
4. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
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.
6. Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1Vdifferential.
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.
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 V
IN
= 16V for t = 10ms.
9. The error flag comparator includes 3% hysteresis.
May 2006
5
M9999-051506
(408) 955-1690
Embedded System
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