MIC5207
Micrel, Inc.
MIC5207
180mA Low-Noise LDO Regulator
Final Information
General Description
The MIC5207 is an efficient linear voltage regulator with ultra-
low-noise output, very low dropout voltage (typically 17mV at
light loads and 165mV at 150mA), and very low ground
current (720µA at 100mA output). The MIC5207 offers better
than 3% initial accuracy.
Designed especially for hand-held, battery-powered devices,
the MIC5207 includes a CMOS or TTL compatible enable/
shutdown control input. When shutdown, power consump-
tion drops nearly to zero.
Key MIC5207 features include a reference bypass pin to
improve its already low-noise performance, reversed-battery
protection, current limiting, and overtemperature shutdown.
The MIC5207 is available in fixed and adjustable output
voltage versions in a small SOT-23-5 package. Contact
Micrel for details.
For low-dropout regulators that are stable with ceramic
output capacitors, see the
µ
Cap MIC5245/6/7 family.
Features
•
•
•
•
•
•
•
•
•
•
•
Ultra-low-noise output
High output voltage accuracy
Guaranteed 180mA output
Low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Reverse-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
Ordering Information
Standard
MIC5207BM5
MIC5207-1.8BD5
MIC5207-1.8BM5
MIC5207-2.5BM5
MIC5207-2.8BM5
Contact Factory
MIC5207-3.0BM5
Contact Factory
MIC5207-3.2BM5
MIC5207-3.3BM5
MIC5207-3.6BM5
MIC5207-3.8BM5
MIC5207-4.0BM5
MIC5207-5.0BM5
MIC5207-3.3BZ
Part Number*
Marking Code
Pb-Free
LEAA
NE18
LE18
LE25
LE28
LE29
LE30
LE31
LE32
LE33
LE36
LE38
LE40
LE50
---
MIC5207YM5
MIC5207-1.8YD5
MIC5207-1.8YM5
MIC5207-2.5YM5
MIC5207-2.8YM5
MIC5207-2.9YM5
MIC5207-3.0YM5
MIC5207-3.1YM5
MIC5207-3.2YM5
MIC5207-3.3YM5
MIC5207-3.6YM5
MIC5207-3.8YM5
MIC5207-4.0YM5
MIC5207-5.0YM5
MIC5207-3.3YZ
Marking Code
LEAA
NE18
LE18
LE25
LE28
LE29
LE30
LE31
LE32
LE33
LE36
LE38
LE40
LE50
—
Voltage
Adj
1.8
1.8
2.5
2.8
2.9
3.0
3.1
3.2
3.3
3.6
3.8
4.0
5.0
3.3
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
Package
SOT-23-5
Thin 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
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
TO-92
* Other voltages available. Contact Micrel Marketing for information.
**Under bar symbol (_) may not be to scale.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2005
1
MIC5207
MIC5207
Micrel, Inc.
Typical Application
V
IN
MIC5207-x.xBM5
1
2
Enable
Shutdown
3
4
5
V
OUT
C
OUT
= 2.2µF
tantalum
Enable
EN (pin 3) may be
connected directly
to IN (pin 1).
C
BYP
(OPTIONAL)
Low-Noise Operation:
C
BYP
= 470pF, C
OUT
≥
2.2µF
Battery-Powered Regulator Application
Pin Configuration
EN GND IN
3
2
1
EN GND IN
3
2
1
LEAA
4
5
Part
Identification
LExx
4
5
1
2
3
IN GND OUT
(Bottom View)
ADJ
OUT
BYP
OUT
MIC5207BM5
SOT-23-5
(Adjustable Voltage)
MIC5207-x.xBM5
SOT-23-5
MIC5207-x.xBD5
TSOT-23-5
(Fixed Voltages)
MIC5207-x.xBZ
TO-92
(Fixed Voltages)
Pin Description
Pin No.
SOT-23-5
1
2
3
4 (fix)
Pin No.
TO-92
1
2
Pin Name
IN
GND
EN
BYP
Pin Function
Supply Input
Ground
Enable/Shutdown (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown.
Reference Bypass: Connect external 470pF capacitor to GND to reduce
output noise. May be left open. For 1.8V or 2.5V operation, see “Applications
Information.”
Adjust (Input): Adjustable regulator feedback input. Connect to resistor
voltage divider.
Regulator Output
4 (adj)
5
3
ADJ
OUT
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
Lead Temperature (soldering, 5 sec.) ....................... 260°C
Junction Temperature (T
J
)
all except 1.8V ...................................... –40°C to +125°C
1.8V only .................................................. 0°C to +125°C
Storage Temperature (T
S
) ....................... –65°C to +150°C
Operating Ratings
(Note 2)
Input Voltage (V
IN
) ....................................... +2.5V to +16V
Enable Input Voltage (V
EN
) .................................. 0V to V
IN
Junction Temperature (T
J
)
all except 1.8V ...................................... –40°C to +125°C
1.8V only .................................................. 0°C to +125°C
Thermal Resistance
(θ
JA
).........................................
Note 3
MIC5207
2
March 2005
MIC5207
Micrel, Inc.
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 except
0°C
≤
T
J
≤
+125°C for 1.8V version; 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 specified 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
= 2.2µF,
470pF from BYP to GND
Min
–3
–4
40
0.005
0.05
17
115
140
165
0.01
80
350
720
1800
75
320
0.05
260
500
0.05
0.10
0.5
0.7
60
80
175
250
280
325
300
400
1
5
130
170
650
900
1100
2000
2500
3000
Typical
Max
3
4
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.
Note 2.
Note 3:
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
–1
–2
20
25
µA
µA
µA
µA
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
The maximum allowable power dissipation at any T
A
(ambient temperature) is P
D(max)
= (T
T
J(max)
–
A
)
÷
θ
JA
. Exceeding the maximum
allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. The
θ
JA
of the SOT-23-5
(M5) is 235°C/W and the TO-92 (Z) is 180°C/W (0.4" leads) or 160°C/W (0.25" leads) soldered to a PC board. See “Thermal Considerations.”
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 180mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
Dropout voltage is 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 180mA load pulse at V
IN
= 16V for t = 10ms.
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
March 2005
3
MIC5207
MIC5207
Micrel, Inc.
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)
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
V
IN
= 6V
V
OUT
= 5V
10mA
I
OUT
= 100mA
I
OUT
= 100µA
C
OUT
= 1µF
I
OUT
= 100µA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
-100
1E+11E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
-100
1E+11E+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)
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
V
IN
= 6V
V
OUT
= 5V
1mA
I
OUT
= 1mA
C
OUT
= 1µF
I
OUT
= 1mA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
-100
1E+11E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
-100
1E+11E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
0
-20
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
-40
-60
-80
Power Supply
Rejection Ratio
10000
V
IN
= 6V
V
OUT
= 5V
Turn-On Time
vs. Bypass Capacitance
PSRR (dB)
-40
-60
-80
I
OUT
= 10mA
C
OUT
= 1µF
TIME (µs)
I
OUT
= 10mA
C
OUT
= 2.2µF
C
BYP
= 0.01µF
1000
100
-100
1E+11E+2 1E+3 1E+4 1E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
-100
1E+11E+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
Power Supply
Rejection Ratio
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
0
-20
-40
-60
-80
Power Supply
Rejection Ratio
320
DROPOUT VOLTAGE (mV)
Dropout Voltage
vs. Output Current
280
240
200
160
120
80
40
0
0
40
80
120
160
OUTPUT CURRENT (mA)
–40°C
+125°C
+25°C
V
IN
= 6V
V
OUT
= 5V
PSRR (dB)
-40
-60
-80
I
OUT
= 100mA
C
OUT
= 1µF
-100
1E+1 1E+2 1E+3 1E+41E+5 1E+6 1E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
-100
1E+1 1E+2 1E+31E+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
MIC5207
4
March 2005
MIC5207
Micrel, Inc.
Typical Characteristics
Noise Performance
10
10mA, C
OUT
= 1µF
1
NOISE (µV/√Hz)
NOISE (µV/√Hz)
Noise Performance
10
1
100mA
NOISE (µV/√Hz)
Noise Performance
10
1
10mA
0.1
0.01
100mA
0.1
0.01
0.001
1mA
C
OUT
= 1µF
C
BYP
= 10nF
0.1
0.01
0.001
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
1mA
10mA
V
OUT
= 5V
0.0001
1E+1 1E+2 1E+3 1E+4 1E+51E+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+61E+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+61E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Noise Performance
10
1
NOISE (µV/√Hz)
0.1
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+61E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
0.01
10
1
NOISE (µV/√Hz)
Noise Performance
10
10mA
100mA
0.1
0.01
0.001
1mA
NOISE (µV/√Hz)
Noise Performance
100mA
1
100mA
0.1
0.01
0.001
1mA
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
C
BYP
= 10nF
10mA
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
C
BYP
= 1nF
0.0001
1E+1 1E+2 1E+3 1E+4 1E+5 1E+61E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
0.0001
1E+1 1E+2 1E+3 1E+4 1E+5 1E+61E+7
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
March 2005
5
MIC5207
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