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 low-
noise 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 adjust-
able output voltage versions, featuring the reference bypass
option, are available in the 8-lead Micrel Mini 8™ 8-lead
MSOP (micro small-outline package).
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 V
CC
and V
PP
regulation/switching
Consumer/personal electronics
SMPS post-regulator/dc-to-dc modules
High-efficiency linear power supplies
For low-dropout regulators that are stable with ceramic
output capacitors, see the
µ
Cap MIC5245/6/7 family.
Typical Applications
47k
V
OUT
1
8
7
6
5
V
IN
Enable
Shutdown
MIC5206-x.xBM5
V
IN
1
2
Enable
Shutdown
Enable (pin 3) may be
connected directly to
Supply Input (pin 1).
3
4
5
1µF
2
3
4
V
OUT
100k
C
OUT
1µF tantalum
Flag Output
(optional)
tantalum
R1
MIC5206BMM
Enable (pin 7) may be
connected directly to
Supply Input (pin 8).
Flag Output
(optional)
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 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
January 2000
1
MIC5206
MIC5206
Micrel
Ordering Information
Part Number
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
—
—
—
—
—
—
—
Volts
2.5
2.7
3.0
3.2
3.3
3.6
3.8
4.0
5.0
Adj
3.0
3.3
3.6
3.8
4.0
5.0
Accuracy
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
8-lead MSOP
8-lead MSOP
8-lead MSOP
8-lead MSOP
8-lead MSOP
8-lead MSOP
8-lead MSOP
Other voltages available. Contact Micrel for details.
Pin Configuration
EN GND IN
3
2
1
LDxx
4
5
FLAG
OUT
MIC5206-xxBM5
(Fixed Output Voltage)
OUT
OUT
FLAG
GND
1
2
3
4
8
7
6
5
IN
EN
GND
BYP
OUT
OUT
FLAG
GND
1
2
3
4
8
7
6
5
IN
EN
GND
ADJ
MIC5206-x.xBMM
(Fixed Output Voltage)
MIC5206BMM
(Adjustable Ouput Voltage)
Pin Description
MIC5206
SOT-23-5
1
2
3
4
MIC5206
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 ouput
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
MIC5206
2
January 2000
MIC5206
Micrel
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage (V
IN
) ............................ –20V to +20V
Enable Input Voltage (V
EN
) ........................... –20V to +20V
Power Dissipation (P
D
) ............... Internally Limited,
Note 3
Junction Temperature (T
J
) ....................... –40°C to +125°C
Lead Temperature (Soldering, 5 sec.) ...................... 260°C
Operating Ratings
(Note 2)
Supply Input Voltage (V
IN
) ........................... +2.5V to +16V
Enable Input Voltage (V
EN
) .................................. 0V to V
IN
Junction Temperature (T
J
) ....................... –40°C to +125°C
SOT-23-5 (θ
JA
) .........................................................
Note 3
8-lead MSOP (θ
JA
) ...................................................
Note 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
Conditions
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
Enable Input
V
IL
V
IH
I
IL
I
IH
Error Flag Output
V
ERR
V
OL
I
FL
Flag Threshold
Output Logic-Low Voltage
Flag Leakage Current
undervoltage condition (below nominal)
Note 9
I
L
= 1mA, undervoltage condition
flag off, V
FLAG
= 0V to 16V
–1
–2
–6
0.2
0.1
–10
0.4
+1
%
V
µA
Enable Input Logic-Low Voltage
Enable Input Logic-High Voltage
Enable Input Current
regulator shutdown
regulator enabled
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
0.4
0.18
V
V
V
µA
µA
µA
µA
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)
Min
–1
–2
40
0.004
0.02
17
110
140
165
0.01
80
350
600
1300
75
320
0.05
260
500
0.012
0.2
50
70
150
230
250
300
275
350
1
5
125
150
600
800
1000
1500
1900
2500
Typical
Max
1
2
Units
%
%
ppm/°C
%/V
%
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
dB
mA
%/W
nV Hz
January 2000
3
MIC5206
MIC5206
Note 1:
Note 2.
Note 3:
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Micrel
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
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 the
MIC5205-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).
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
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.
Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V
differential.
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.
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.
The error flag comparator includes 3% hysteresis.
Typical Characteristics
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
PSRR (dB)
-40
-60
-80
0
-20
-40
-60
-80
Power Supply
Rejection Ratio
RIPPLE REJECTION (dB)
V
IN
= 6V
V
OUT
= 5V
Power Supply Ripple Rejection
vs. Voltage Drop
60
50
40
30
20
10
0
0
C
OUT
= 1µF
0.1
0.2
0.3
VOLTAGE DROP (V)
0.4
1mA
10mA
I
OUT
= 100mA
I
OUT
= 100µA
C
OUT
= 1µF
I
OUT
= 100µA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
0
-20
PSRR (dB)
-40
-60
-80
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
-40
-60
-80
Power Supply
Rejection Ratio
RIPPLE REJECTION (dB)
V
IN
= 6V
V
OUT
= 5V
Power Supply Ripple Rejection
vs. Voltage Drop
100
90
80
70
60
50
40
30
20
10
0
I
OUT
= 100mA
10mA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
0
0.1
0.2
0.3
VOLTAGE DROP (V)
0.4
1mA
I
OUT
= 1mA
C
OUT
= 1µF
I
OUT
= 1mA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
MIC5206
4
January 2000
MIC5206
Micrel
Typical Characteristics
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
PSRR (dB)
-40
-60
-80
0
-20
-40
-60
-80
Power Supply
Rejection Ratio
10000
V
IN
= 6V
V
OUT
= 5V
Turn-On Time
vs. Bypass Capacitance
TIME (µs)
I
OUT
= 10mA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
1000
100
I
OUT
= 10mA
C
OUT
= 1µF
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
10
10
100
1000
CAPACITANCE (pF)
10000
0
-20
PSRR (dB)
-40
-60
-80
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
-40
-60
-80
Power Supply
Rejection Ratio
10
V
IN
= 6V
V
OUT
= 5V
Noise Performance
10mA, C
OUT
= 1µF
1
NOISE (µV/√Hz)
0.1
0.01
0.001
V
OUT
= 5V
0.0001
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
1mA
C
OUT
= 1µF
C
BYP
= 10nF
I
OUT
= 100mA
C
OUT
= 1µF
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
I
OUT
= 100mA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
Noise Performance
10
1
NOISE (µV/√Hz)
0.1
0.01
0.001
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
1mA
100mA
NOISE (µV/√Hz)
10mA
10
1
Noise Performance
10
1
10mA
0.1
0.01
100mA
NOISE (µV/√Hz)
0.1
Noise Performance
100mA
0.0001
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
V
OUT
= 5V
C
OUT
= 22µF
1mA
0.001
tantalum
C
BYP
= 10nF
0.0001
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
1mA
V
OUT
= 5V
C
OUT
= 10µF
0.001 electrolytic
10mA
C
BYP
= 100pF
0.0001
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
0.01
Noise Performance
10
1
NOISE (µV/√Hz)
0.1
0.01
0.001
1mA
10mA
100mA
10
Noise Performance
320
DROPOUT VOLTAGE (mV)
280
240
200
160
120
80
40
0
0
10mA
100mA
0.1
0.01
0.001
1mA
Dropout Voltage
vs. Output Current
1
NOISE (µV/√Hz)
+125°C
+25°C
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
C
BYP
= 1nF
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
C
BYP
= 1nF
–40°C
0.0001
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
0.0001
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
40
80
120
160
OUTPUT CURRENT (mA)
January 2000
5
MIC5206
嵌入式系统
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