MIC5210
Micrel
MIC5210
Dual 150mA LDO Regulator
Preliminary Information
General Description
The MIC5210 is a dual linear voltage regulator with very low
dropout voltage (typically 10mV at light loads and 140mV at
100mA), very low ground current (225µA at 10mA output), and
better than 1% initial accuracy. It also features individual logic-
compatible enable/shutdown control inputs.
Both regulator outputs can supply up to 150mA at the same
time as long as each regulator’s maximum junction tempera-
ture is not exceeded.
Designed especially for hand-held battery powered devices,
the MIC5210 can be switched by a CMOS or TTL compatible
logic signal, or the enable pin can be connected to the supply
input for 3-terminal operation. When disabled, power con-
sumption drops nearly to zero. Dropout ground current is
minimized to prolong battery life.
Key features include current limiting, overtemperature shut-
down, and protection against reversed battery.
The MIC5210 is available in 2.7V, 2.8V, 3.0V, 3.3V, 3.6V, 4.0V
and 5.0V fixed voltage configurations. Other voltages are
available; contact Micrel for details.
Features
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Micrel Mini 8™ MSOP package
Up to 150mA per regulator output
Low quiescent current
Low dropout voltage
Wide selection of output voltages
Tight load and line regulation
Low temperature coefficient
Current and thermal limiting
Reversed input polarity protection
Zero off-mode current
Logic-controlled electronic enable
Cellular telephones
Laptop, notebook, and palmtop computers
Battery powered equipment
Bar code scanners
SMPS post regulator/dc-to-dc modules
High-efficiency linear power supplies
Applications
Ordering Information
Part Number
MIC5210-2.7BMM
MIC5210-2.8BMM
MIC5210-3.0BMM
MIC5210-3.3BMM
MIC5210-3.6BMM
MIC5210-4.0BMM
MIC5210-5.0BMM
Voltage
2.7
2.8
3.0
3.3
3.6
4.0
5.0
Accuracy
1.0%
1.0%
1.0%
1.0%
1.0%
1.0%
1.0%
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
Package
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.
Typical Application
MIC5210
Output A
1µF
tantalum
Output B
2.2µF
tantalum
1
2
3
4
8
7
6
5
Enable A
Enable B
1µF
C
BYP
470pF
Enable may be connected to VIN
Low-Noise + Ultralow-Noise (Dual) Regulator
MM8 and Micrel Mini 8 are trademarks 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
February 2000
1
MIC5210
MIC5210
Micrel
Pin Configuration
OUTA
GND
OUTB
BYPB
1
2
3
4
8
7
6
5
INA
ENA
INB
ENB
MIC5210BMM
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
OUTA
GND
OUTB
BYPB
ENB
INB
ENA
INA
Pin Function
Regulator Output A
Ground.
Regulator Output B
Reference Bypass B: Connect external 470pF capacitor to GND to reduce
output noise in regulator “B”. May be left open.
Enable/Shutdown B (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown. Do not leave floating.
Supply Input B
Enable/Shutdown A (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown. Do not leave floating.
Supply Input A
Absolute Maximum Ratings
Supply Input Voltage (V
IN
) ............................ –20V to +20V
Enable Input Voltage (V
EN
) ........................... –20V to +20V
Power Dissipation (P
D
) ............................ Internally Limited
Storage Temperature Range ................... –60°C to +150°C
Lead Temperature (soldering, 5 sec.) ....................... 260°C
Recommended Operating Conditions
Supply Input Voltage (V
IN
) ............................... 2.5V to 16V
Enable Input Voltage (V
EN
) ................................. 0V to 16V
Junction Temperature (T
J
) ....................... –40°C to +125°C
Thermal Resistance
(θ
JA
).........................................
Note 1
MIC5210
2
February 2000
MIC5210
Micrel
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 4
Conditions
variation from specified V
OUT
Note 2
V
IN
= V
OUT
+ 1V to 16V
I
L
= 0.1mA to 150mA (Note 3)
I
L
= 100µA
I
L
= 50mA
I
L
= 100mA
I
L
= 150mA
I
GND
I
GND
Quiescent Current
Ground Pin Current,
Note 5
(per regulator)
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 (Regulator B only)
frequency = 100Hz, I
L
= 100µA
V
OUT
= 0V
Note 6
I
L
= 50mA, C
L
= 2.2µF,
470pF from BYPB to GND
Min
–1
–2
40
0.004
0.02
10
110
140
165
0.01
80
350
600
1300
75
320
0.05
260
500
0.012
0.05
0.2
0.5
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
%/V
%
%
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
dB
mA
%/W
nV/ Hz
ENABLE Input
V
IL
V
IH
I
IL
I
IH
Note 1:
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
0.4
0.18
V
V
V
µA
µA
µA
µA
–1
–2
20
25
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when
operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction
temperature, T
J(max)
, the junction-to-ambient thermal resistance,
θ
JA
, and the ambient temperature, T
A
. The maximum allowable power
dissipation at any ambient temperature is calculated using: P
D(max)
= (T
J(max)
– T
A
)
÷ θ
JA
. Exceeding the maximum allowable power dissipa-
tion will result in excessive die temperature, and the regulator will go into thermal shutdown. The
θ
JA
of the 8-lead MSOP (MM) is 200°C/W
mounted on a PC board (see “Thermal Considerations” section 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.
February 2000
3
MIC5210
MIC5210
Micrel
Typical Characteristics
Power Supply
Rejection Ratio
0
-20
PSRR (dB)
-40
-60
-80
I
OUT
= 100µA
C
OUT
= 1µF
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
-40
-60
-80
I
OUT
= 1mA
C
OUT
= 1µF
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
-40
-60
-80
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
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)
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Power Supply
Rejection Ratio
0
-20
PSRR (dB)
-40
-60
-80
I
OUT
= 100mA
C
OUT
= 1µF
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
-40
-60
-80
Power Supply
Rejection Ratio
0
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
-20
-40
-60
-80
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
I
OUT
= 100µA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
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)
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Power Supply
Rejection Ratio
0
-20
PSRR (dB)
-40
-60
-80
I
OUT
= 10mA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
V
IN
= 6V
V
OUT
= 5V
Turn-On Time
vs. Bypass Capacitance
10000
RIPPLE REJECTION (dB)
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
TIME (µs)
1000
10mA
I
OUT
= 100mA
100
-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
Power Supply Ripple Rejection
vs. Voltage Drop
RIPPLE REJECTION (dB)
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
PSRR (dB)
Power Supply
Rejection Ratio
0
-20
-40
-60
-80
I
OUT
= 100mA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
V
IN
= 6V
V
OUT
= 5V
Noise Performance
10
10mA, C
OUT
= 1µF
1
NOISE (µV/√Hz)
0.1
0.01
0.001
V
OUT
= 5V
0.0001
10 100 1k 10k 100k 1M 10M
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
FREQUENCY (Hz)
1mA
C
OUT
= 1µF
C
BYP
= 10nF
(Reg. B only)
-100
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
MIC5210
4
February 2000
MIC5210
Micrel
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
(Regulator B)
10
1
10mA
0.1
0.01
100mA
NOISE (µV/√Hz)
Noise Performance
(Regulator B)
100mA
0.1
1mA
V
OUT
= 5V
C
OUT
= 10µF
0.001 electrolytic
10mA
C
BYP
= 100pF
0.0001
10 100 1k 10k 100k 1M 10M
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
FREQUENCY (Hz)
0.01
0.0001
10 100 1k 10k 100k 1M 10M
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
FREQUENCY (Hz)
V
OUT
= 5V
C
OUT
= 22µF
1mA
0.001
tantalum
C
BYP
= 10nF
0.0001
10 100 1k 10k 100k 1M 10M
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
FREQUENCY (Hz)
Noise Performance
(Regulator B)
10
1
NOISE (µV/√Hz)
0.1
0.01
0.001
1mA
10mA
100mA
NOISE (µV/√Hz)
10
Noise Performance
(Regulator B)
320
DROPOUT VOLTAGE (mV)
280
240
200
160
120
80
40
0
0
Dropout Voltage
vs. Output Current
1
0.1
0.01
0.001
100mA
+125°C
+25°C
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
C
BYP
= 1nF
1mA
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
C
BYP
= 10nF
10mA
–40°C
0.0001
10 100 1k 10k 100k 1M 10M
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
FREQUENCY (Hz)
0.0001
10 100 1k 10k 100k 1M 10M
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
FREQUENCY (Hz)
40
80
120
160
OUTPUT CURRENT (mA)
February 2000
5
MIC5210
Microchip MCU
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