MIC5209
500mA Low-Noise LDO Regulator
General Description
The MIC5209 is an efficient linear voltage regulator with very
low dropout voltage, typically 10mV at light loads and less
than 500mV at full load, with better than 1% output voltage
accuracy.
Designed especially for hand-held, battery-powered devices,
the MIC5209 features low ground current to help prolong
battery life. An enable/shutdown pin on SO-8 and TO-263-
5 versions can further improve battery life with near-zero
shutdown current.
Key features include reversed-battery protection, current
limiting, overtemperature shutdown, ultra-low-noise capability
(SO-8 and TO-263-5 versions), and availability in thermally
efficient packaging. The MIC5209 is available in adjustable
or fixed output voltages.
For space-critical applications where peak currents do not
exceed 500mA, see the MIC5219.
Features
• Meets Intel
®
Slot 1 and Slot 2 requirements
• Guaranteed 500mA output over the full operating
temperature range
• Low 500mV maximum dropout voltage at full load
• Extremely tight load and line regulation
• Thermally-efficient surface-mount package
• Low temperature coefficient
• Current and thermal limiting
• Reversed-battery protection
• No-load stability
• 1% output accuracy
• Ultra-low-noise capability in SO-8 and TO-263-5
• Ultra-small 3mm x 3mm MLF™ package
Applications
•
•
•
•
•
•
Pentium II Slot 1 and Slot 2 support circuits
Laptop, notebook, and palmtop computers
Cellular telephones
Consumer and personal electronics
SMPS post-regulator/dc-to-dc modules
High-efficiency linear power supplies
Typical Applications
MIC5209-2.5BS
V
IN
≥ 3.0V
1
2
3
V
OUT
2.5V ±1%
22µF
tantalum
0.1µF
3.3V Nominal-Input Slot-1
Power Supply
ENABLE
SHUTDOWN
1
2
3
4
MIC5209-5.0BM
8
7
6
5
V
IN
6V
V
OUT
5V
2.2µF
tantalum
470pF
(OPTIONAL)
Ultra-Low-Noise 5V Regulator
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2006
1
M9999-060906
MIC5209
Micrel, Inc.
Voltage
2.5V
2.5V
3.0V
3.0V
3.3V
3.3V
3.6V
3.6V
4.2V
4.2V
5.0V
5.0V
1.8V
1.8V
2.5V
2.5V
3.0V
3.0V
3.3V
3.3V
3.6V
3.6V
5.0V
5.0V
Adj.
Adj.
1.8V
2.5V
2.5V
3.0V
3.0V
3.3V
3.3V
3.6V
3.6V
5.0V
5.0V
Adj.
Adj.
Adj.
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
-0°C to +125°C
-0°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
-0°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-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
8-pin MLF™
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Pb-Free
Ordering Information
Part Number
MIC5209-2.5BS
MIC5209-2.5YS
MIC5209-3.0BS
MIC5209-3.0YS
MIC5209-3.3BS
MIC5209-3.3YS
MIC5209-3.6BS
MIC5209-3.6YS
MIC5209-4.2BS
MIC5209-4.2YS
MIC5209-5.0BS
MIC5209-5.0YS
MIC5209-1.8BM*
MIC5209-1.8YM*
MIC5209-2.5BM
MIC5209-2.5YM
MIC5209-3.0BM
MIC5209-3.0YM
MIC5209-3.3BM
MIC5209-3.3YM
MIC5209-3.6BM
MIC5209-3.6YM
MIC5209-5.0BM
MIC5209-5.0YM
MIC5209BM
MIC5209YM
MIC5209-1.8YU*
MIC5209-2.5BU
MIC5209-2.5YU
MIC5209-3.0BU
MIC5209-3.0YU
MIC5209-3.3BU
MIC5209-3.3YU
MIC5209-3.6BU
MIC5209-3.6YU
MIC5209-5.0BU
MIC5209-5.0YU
MIC5209BU
MIC5209YU
MIC5209YML
* Contact marketing for availability.
M9999-060906
2
June 2006
MIC5209
Micrel, Inc.
GND
TAB
Pin Configuration
VIN 1
VIN 2
VOUT 3
Y
5209
YWW
8
7
6
5
EN
GND
ADJ
NC
Part
Identification
1
2
3
VOUT 4
IN
GND OUT
MIC5209-x.xBS
SOT-223
Fixed Voltages
EN 1
IN 2
OUT 3
BYP 4
8
7
6
5
GND
GND
TAB
MIC5209YML
8-Pin 3x3 MLF
Adjustable Voltages
5
4
3
2
1
BYP
OUT
GND
IN
EN
GND
GND
GND
MIC5209-x.xBM
SO-8
Fixed Voltages
MIC5209-x.xBU
TO-263-5
Fixed Voltages
EN 1
IN 2
OUT 3
ADJ 4
8
7
6
5
GND
GND
GND
GND
5
4
3
2
1
ADJ
OUT
GND
IN
EN
GND
Pin Name
IN
GND
OUT
EN
BYP
Pin Function
Supply Input.
ADJ
TAB
A
MIC5209BM
SO-8
Adjustable Voltage
MIC5209BU
TO-263-5
Adjustable Voltage
Pin Description
Pin No.
8-pin MLF
1, 2
7
3, 4
8
Pin No.
SOT-223
1
2, TAB
3
Pin No.
SO-8
2
5–8
3
1
4 (fixed)
Pin No.
TO-263-5
2
3
4
1
5 (fixed)
Ground: SOT-223 pin 2 and TAB are internally connected. SO-8
pins 5 through 8 are internally connected.
Regulator Output. Pins 3 and 4 must be tied together.
Enable (Input): CMOS compatible control input. Logic high =
enable; logic low = 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): Feedback input. Connect to resistive voltage-divider
network.
6
4 (adj.)
5 (adj.)
June 2006
3
M9999-060906
MIC5209
Micrel, Inc.
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
) ..............................–20V to +20V
Power Dissipation (P
D
) ..........................Internally Limited
(3)
Junction Temperature (T
J
)
all except 1.8V ...................................... –40°C to +125°C
1.8V only................................................... 0°C to +125°C
Lead Temperature (soldering, 5 sec.) ........................ 260°C
Storage Temperature (T
S
) ........................ –65°C to +150°C
Operating Ratings
(2)
Supply 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
Package Thermal Resistance...................................
Note 3
Electrical Characteristics
(Note 11)
V
IN
= V
OUT
+ 1.0V; C
OUT
= 4.7µF, I
OUT
= 100µA; 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
OUT
ΔV
OUT
/ΔT
ΔV
OUT
/V
OUT
ΔV
OUT
/V
OUT
V
IN
– V
OUT
Parameter
Output Voltage Accuracy
Output Voltage
Temperature Coefficient
Line Regulation
Load Regulation
Dropout Voltage
(6)
Conditions
variation from nominal V
OUT
Note 4
V
IN
= V
OUT
+ 1V to 16V
I
OUT
= 100µA to 500mA
(5)
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 150mA
I
OUT
= 500mA
I
GND
Ground Pin Current
(7, 8)
V
EN
≥ 3.0V, I
OUT
= 100µA
V
EN
≥ 3.0V, I
OUT
= 50mA
V
EN
≥ 3.0V, I
OUT
= 150mA
V
EN
≥ 3.0V, I
OUT
= 500mA
I
GND
PSRR
I
LIMIT
ΔV
OUT
/ΔP
D
e
no
Ground Pin Quiescent Current
(8)
Ripple Rejection
Current Limit
Thermal Regulation
Output Noise
(10)
V
EN
≤ 0.4V (shutdown)
f = 120Hz
Min
–1
–2
40
0.009
0.05
10
115
165
350
80
350
1.8
8
0.05
0.10
75
700
0.05
500
300
900
1000
0.05
0.1
0.5
0.7
60
80
175
250
300
400
500
600
130
170
650
900
2.5
3.0
20
25
3
8
Typical
Max
1
2
Units
%
%
ppm/°C
%/V
%/V
%
%
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
µA
mA
mA
mA
mA
µA
µA
dB
mA
mA
%/W
nV √Hz
nV √Hz
V
EN
≤ 0.18V (shutdown)
V
OUT
= 0V
Note 9
V
OUT
= 2.5V, I
OUT
= 50mA,
C
OUT
= 2.2µF, C
BYP
= 0
I
OUT
= 50mA, C
OUT
= 2.2µF, C
BYP
= 470pF
M9999-060906
4
June 2006
MIC5209
ENABLE Input
V
ENL
Enable Input Logic-Low Voltage
V
EN
= logic low (regulator shutdown)
V
EN
= logic high (regulator enabled)
V
ENL
≤ 0.18V
V
ENH
= 2.0V
2.0
0.01
0.01
5
Micrel, Inc.
0.4
0.18
–1
–2
20
25
30
50
V
V
V
µA
µA
µA
µA
µA
µA
I
ENL
I
ENH
Enable Input Current
V
ENL
≤ 0.4V
V
ENH
= 16V
Notes:
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 calculated using: 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. See Table 1 and the
“Thermal Considerations”
section for details.
4. Output voltage temperature coefficient is 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 100µA to 500mA. 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 1V differen-
tial.
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. V
EN
is the voltage externally applied to devices with the EN (enable) input pin. [SO-8 (M) and TO-263-5 (U) packages only.]
9. Thermal regulation is the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line regulation ef-
fects. Specifications are for a 500mA load pulse at V
IN
= 16V for t = 10ms.
10. C
BYP
is an optional, external bypass capacitor connected to devices with a BYP (bypass) or ADJ (adjust) pin. [SO-8 (M) and TO-263-5 (U) packages
only].
June 2006
5
M9999-060906
嵌入式系统
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