The MIC5219 is an efficient linear voltage regulator with high
peak output current capability, very-low-dropout voltage, and
better than 1% output voltage accuracy. Dropout is typically
10mV at light loads and less than 500mV at full load.
The MIC5219 is designed to provide a peak output current for
start-up conditions where higher inrush current is demanded.
It features a 500mA peak output rating. Continuous output
current is limited only by package and layout.
The MIC5219 can be enabled or shut down by a CMOS or
TTL compatible signal. When disabled, power consumption
drops nearly to zero. Dropout ground current is minimized to
help prolong battery life. Other key features include reversed-
battery protection, current limiting, overtemperature shutdown,
and low noise performance with an ultra-low-noise option.
The MIC5219 is available in adjustable or fixed output volt-
ages in the space-saving 6-pin (2mm
×
2mm) MLF
®
, 6-pin
(2mm
×
2mm) Thin MLF
®
SOT-23-5 and MM8
®
8-pin power
MSOP packages. For higher power requirements see the
MIC5209 or MIC5237.
All support documentation can be found on Micrel’s web site
at www.micrel.com.
Features
• 500mA output current capability
SOT-23-5 package - 500mA peak
2mm×2mm MLF
®
package - 500mA continuous
2mm×2mm Thin MLF
®
package - 500mA
continuous
MSOP-8 package - 500mA continuous
• Low 500mV maximum dropout voltage at full load
• Extremely tight load and line regulation
• Tiny SOT-23-5 and MM8™ power MSOP-8 package
• Ultra-low-noise output
• Low temperature coefficient
• Current and thermal limiting
• Reversed-battery protection
• CMOS/TTL-compatible enable/shutdown control
• Near-zero shutdown current
Applications
•
•
•
•
•
•
Laptop, notebook, and palmtop computers
Cellular telephones and battery-powered equipment
Consumer and personal electronics
PC Card V
CC
and V
PP
regulation and switching
SMPS post-regulator/DC-to-DC modules
High-efficiency linear power supplies
Typical Applications
ENABLE
SH U TD OWN
1
2
3
4
MIC5219-5.0BMM
8
7
6
5
V
IN
6V
MIC5219-3.3BM5
V
IN
4V
ENABLE
SH U TD OWN
1
2
3
4
5
V
OUT
5V
2.2µF
tantalum
V
OUT
3.3V
2.2µF
tantalum
470pF
470pF
5V Ultra-Low-Noise Regulator
V
IN
ENABLE
SHUTDOWN
3.3V Ultra-Low-Noise Regulator
V
OUT
V
IN
ENABLE
SHUTDOWN
MIC5219-x.xYM
L
1
2
3
6
5
4
MIC5219YMT
1
2
3
6
5
4
V
OUT
R1
+
2.2µF
EN
C
BYP
C
OUT
EN
(optional)
470pF
R2
Ultra-Low-Noise Regulator (Fixed)
MM8 is a registered trademark of Micrel, Inc.
MicroLeadFrame
and MLF are registered trademarks of Amkor Technology, Inc..
Ultra-Low-Noise Regulator (Adjustable)
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 2009
1
M0371-061809
Micrel, Inc.
MIC5219
Part Number
Marking
Standard
—
—
—
—
—
—
—
LG25
LG26
LG27
LG28
G28
LG2J
LG29
LG31
LG30
G30
LG33
G33
LG36
LG50
LGAA
Pb-Free*
—
—
—
—
—
—
—
LG25
LG26
LG27
LG28
G28
LG2J
LG29
LG31
LG30
G30
LG33
G33
LG36
LG50
LGAA
GAA
G50
Volts
2.5V
2.85V
3.0V
3.3V
3.6V
5.0V
Adj.
2.5V
2.6V
2.7V
2.8V
2.8V
2.85V
2.9V
3.1V
3.0V
3.0V
3.3V
3.3V
3.6V
5.0V
Adj.
Adj.
5.0V
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
–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
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
6-Pin 2×2
MLF
®
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
6-Pin 2×2
MLF
®
SOT-23-5
6-Pin 2×2
MLF
®
SOT-23-5
SOT-23-5
SOT-23-5
6-Pin 2x2 Thin MLF
®**
6-Pin 2x2 Thin MLF
®**
Ordering Information
Standard
MIC5219-2.5BMM
MIC5219-2.85BMM
MIC5219-3.0BMM
MIC5219-3.3BMM
MIC5219-3.6BMM
MIC5219-5.0BMM
MIC5219BMM
MIC5219-2.5BM5
MIC5219-2.6BM5
MIC5219-2.7BM5
MIC5219-2.8BM5
MIC5219-2.8BML
MIC5219-2.85BM5
MIC5219-2.9BM5
MIC5219-3.1BM5
MIC5219-3.0BM5
MIC5219-3.0BML
MIC5219-3.3BM5
MIC5219-3.3BML
MIC5219-3.6BM5
MIC5219-5.0BM5
MIC5219BM5
Pb-Free
MIC5219-2.5YMM
MIC5219-2.85YMM
MIC5219-3.0YMM
MIC5219-3.3YMM
MIC5219-3.6YMM
MIC5219-5.0YMM
MIC5219YMM
MIC5219-2.5YM5
MIC5219-2.6YM5
MIC5219-2.7YM5
MIC5219-2.8YM5
MIC5219-2.8YML
MIC5219-2.85YM5
MIC5219-2.9YM5
MIC5219-3.1YM5
MIC5219-3.0YM5
MIC5219-3.0YML
MIC5219-3.3YM5
MIC5219-3.3YML
MIC5219-3.6YM5
MIC5219-5.0YM5
MIC5219YM5
MIC5219YMT
MIC5219-5.0YMT
Other voltages available. Consult Micrel for details.
* Over/underbar may not be to scale. ** Pin 1 identifier = ▲.
Pin Configuration
EN
1
IN
2
OUT
3
BYP
4
8
GND
7
GND
6
GND
5
GND
EN
1
GND
2
IN
3
6
BYP
5
NC
4
OUT
4
E N GND IN
3
2
1
L Gx x
5
BYP
OUT
MIC5219-x.xBMM / MM8
®
/ MSOP-8
Fixed Voltages
(Top View)
EN
1
IN
2
OUT
3
BYP
4
8
GND
7
GND
6
GND
5
GND
MIC5219-x.xBML
6-Pin 2mm
×
2mm MLF
®
(ML)
(Top View)
MIC5219-x.xBM5 / SOT-23-5
Fixed Voltages
(Top View)
E N GND IN
EN
1
GND
2
IN
3
6
NC
5
ADJ
4
OUT
3
2
1
LGAA
4
5
Part
Identification
ADJ
OUT
MIC5219YMM / MIC5219BMM
MM8
®
MSOP-8
Adjustable Voltage
(Top View)
June 2009
MIC5219YMT
6-Pin 2mm
×
2mm Thin MLF
®
(MT)
(Top View)
2
MIC5219BM5 / SOT-23-5
Adjustable Voltage
(Top View)
M0371-061809
Micrel, Inc.
MIC5219
Pin No.
MSOP-8
2
5–8
3
1
4 (fixed)
4 (adj.)
—
Pin No.
SOT-23-5
1
2
5
3
4 (fixed)
4 (adj.)
—
Pin Name
Pin Function
Pin Description
Pin No.
MLF-6
TMLF-6
3
2
4
1
6
5(NC)
EP
IN
GND
OUT
EN
BYP
ADJ
GND
Supply Input.
Ground: MSOP-8 pins 5 through 8 are internally connected.
Regulator Output.
Enable (Input): CMOS compatible control 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.
Adjust (Input): Feedback input. Connect to resistive voltage-divider network.
Ground: Internally connected to the exposed pad. Connect externally to
GND pin.
June 2009
3
M0371-061809
Micrel, Inc.
MIC5219
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
) ..............................–20V
to +20V
Power Dissipation (P
D
) .............................
Internally Limited
Junction Temperature (T
J
) ........................
–40°C to +125°C
Storage Temperature (T
S
) ........................
–65°C to +150°C
Lead Temperature (Soldering, 5 sec.)
.......................
260°C
Operating Ratings
(2)
Supply Input Voltage (V
IN
) ............................
+2.5V to +12V
Enable Input Voltage (V
EN
)....................................0V
to V
IN
Junction Temperature (T
J
) ........................
–40°C to +125°C
Package Thermal Resistance
...........................
see Table 1
Electrical Characteristics
(3)
Symbol
V
OUT
ΔV
OUT
/ΔT
ppm/°C
ΔV
OUT
/V
OUT
ΔV
OUT
/V
OUT
V
IN
– V
OUT
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; unless noted.
Parameter
Conditions
Min
–1
–2
40
Output Voltage Accuracy
Output Voltage
Temperature Coefficient
Line Regulation
Load Regulation
Dropout Voltage
(6)
V
IN
= V
OUT
+ 1V to 12V
I
OUT
= 100µA to 500mA,
Note 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
Ground Pin Quiescent Current
(8)
PSRR
ΔV
OUT
/ΔP
D
I
LIMIT
Ripple Rejection
Current Limit
Thermal Regulation
Output Noise
(10)
V
EN
≤ 0.4V
f = 120Hz
Note 9
0.009
0.05
10
115
175
350
80
350
1.8
12
0.05
0.10
75
700
0.05
500
300
0.4
0.18
2.0
0.01
0.01
2
5
–1
–2
20
25
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
%/V
%
mV
mV
mV
mV
µA
µA
mA
mA
µA
µA
dB
mA
%/W
nV/ Hz
nV/ Hz
Typical
Max
1
2
Units
%
%
variation from nominal V
OUT
Note 4
V
EN
≤ 0.18V
V
OUT
= 0V
I
OUT
= 50mA, C
OUT
= 2.2µF, C
BYP
= 0
e
no
ENABLE Input
V
ENL
Enable Input Logic-Low Voltage
I
OUT
= 50mA, C
OUT
= 2.2µF, C
BYP
= 470pF
V
EN
= logic low (regulator shutdown)
V
EN
= logic high (regulator enabled)
V
ENL
≤ 0.18V
V
ENH
≥ 2.0V
V
ENL
≤ 0.4V
V
V
µA
µA
µA
I
ENL
I
ENH
Enable Input Current
June 2009
4
M0371-061809
Micrel, Inc.
Notes:
MIC5219
1. 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 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.
2. The device is not guaranteed to function outside its operating rating.
3. Specification for packaged product only.
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 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.
9. 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 regu-
lation effects. Specifications are for a 500mA load pulse at V
IN
= 12V for t = 10ms.
10. C
BYP
is an optional, external bypass capacitor connected to devices with a BYP (bypass) or ADJ (adjust) pin.
编译自semiengineering 业界越来越关注人工智能的功耗问题，但这个问题并没有简单的解决方案。这需要深入了解应用、半导体和系统层面的软件和硬件架构，以及所有这些的设计和实现方式。每个环节都会影响总功耗和提供的效用。这是最终必须做出的权衡。 但首先，必须解决效用问题。电力是否被浪费了？“我们将电力用于有价值的用途，”Ansys（现为新思科技旗下公司）产品营销总监 Marc Swi...[详细]
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