January 2000
1
MIC5216
MIC5216
Micrel
Typical Applications
MIC5216
500mA-Peak Output LDO Regulator
Preliminary Information
General Description
The MIC5216 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 MIC5216 is designed to provide a peak output current for
startup 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 MIC5216 has an internal undervoltage monitor with a flag
output. It also can be enabled or shutdown 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 shut-
down, and low noise performance.
The MIC5216 is available in fixed output voltages in space-
saving SOT-23-5 and MM8TM 8-lead power MSOP pack-
ages. For higher power requirements see the MIC5209 or
MIC5237.
Features
Error Flag indicates undervoltage fault
Guaranteed 500mA-peak output over the full operating
temperature range
Low 500mV maximum dropout voltage at full load
Extremely tight load and line regulation
Tiny SOT-23-5 and MM8TM power MSOP-8 package
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
Ordering Information
Part Number
Marking
Volts
Junction Temp. Range
Package
MIC5216-3.0BMM
--
3.0V
40
C to +125
C
MSOP-8
MIC5216-3.3BMM
--
3.3V
40
C to +125
C
MSOP-8
MIC5216-3.6BMM
--
3.6V
40
C to +125
C
MSOP-8
MIC5216-5.0BMM
--
5.0V
40
C to +125
C
MSOP-8
MIC5216-3.0BM5
LH30
3.0V
40
C to +125
C
SOT-23-5
MIC5216-3.3BM5
LH33
3.3V
40
C to +125
C
SOT-23-5
MIC5216-3.6BM5
LH36
3.6V
40
C to +125
C
SOT-23-5
MIC5216-5.0BM5
LH50
5.0V
40
C to +125
C
SOT-23-5
1
2
3
4
8
7
6
5
MIC5216-5.0BMM
1.0F
tantalum
V
OUT
5V
V
IN
6V
100k
Flag
5V Low-Noise Regulator
1
5
2
3
4
1.0F
tantalum
V
OUT
3.3V
MIC5216-3.3BM5
V
IN
4V
ENABLE
SHUTDOWN
Flag
100k
3.3V Low-Noise Regulator
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
MIC5216
Micrel
MIC5216
2
January 2000
1
2
3
4
8
7
6
5
GND
GND
GND
GND
EN
IN
OUT
FLG
MIC5216-x.xBMM
MM8TM MSOP-8
Fixed Voltages
Pin Description
Pin No.
Pin No.
Pin Name
Pin Function
MSOP-8
SOT-23-5
2
1
IN
Supply Input
58
2
GND
Ground: MSOP-8 pins 5 through 8 are internally connected.
3
5
OUT
Regulator Output
1
3
EN
Enable (Input): CMOS compatible control input. Logic high = enable; logic
low or open = shutdown.
4
4
FLG
Error Flag (Output): Open-Collector output. Active low indicates an output
undervoltage condition.
IN
OUT
FLG
EN
LHxx
1
3
4
5
2
GND
MIC5216-x.xBM5
SOT-23-5
Fixed Voltages
Pin Configuration
Absolute Maximum Ratings
Supply Input Voltage (V
IN
) ............................ 20V to +20V
Power Dissipation (P
D
) ............................ Internally Limited
Junction Temperature (T
J
) ....................... 40
C to +125
C
Lead Temperature (Soldering, 5 sec.) ...................... 260
C
Operating Ratings
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 Note 1
January 2000
3
MIC5216
MIC5216
Micrel
Electrical Characteristics
V
IN
= V
OUT
+ 1.0V; C
OUT
= 4.7
F, I
OUT
= 100
A; T
J
= 25
C, bold values indicate 40
C
T
J
+125
C; unless noted.
Symbol
Parameter
Conditions
Min
Typical
Max
Units
V
OUT
Output Voltage Accuracy
variation from nominal V
OUT
1
1
%
2
2
%
V
OUT
/
T
Output Voltage
Note 2
40
ppm/
C
Temperature Coefficient
V
OUT
/V
OUT
Line Regulation
V
IN
= V
OUT
+ 1V to 12V
0.009
0.05
%/V
0.1
V
OUT
/V
OUT
Load Regulation
I
OUT
= 100
A to 500mA Note 3
0.05
0.5
%
0.7
V
IN
V
OUT
Dropout Voltage, Note 4
I
OUT
= 100
A
10
60
mV
80
I
OUT
= 50mA
115
175
mV
250
I
OUT
= 150mA
165
300
mV
400
I
OUT
= 500mA
300
500
mV
600
I
GND
Ground Pin Current, Notes 5, 6
V
EN
3.0V, I
OUT
= 100
A
80
130
A
170
V
EN
3.0V, I
OUT
= 50mA
350
650
A
900
V
EN
3.0V, I
OUT
= 150mA
1.8
2.5
mA
3.0
V
EN
3.0V, I
OUT
= 500mA
8
20
mA
25
Ground Pin Quiescent Current,
V
EN
0.4V
0.05
3
A
Note 6
V
EN
0.18V
0.10
8
A
PSRR
Ripple Rejection
f = 120Hz
75
dB
I
LIMIT
Current Limit
V
OUT
= 0V
700
1000
mA
V
OUT
/
P
D
Thermal Regulation
Note 7
0.05
%/W
e
no
Output Noise
I
OUT
= 50mA, C
OUT
= 2.2
F
500
nV/ Hz
ENABLE Input
V
ENL
Enable Input Voltage
V
EN
= logic low (regulator shutdown)
0.4
V
0.18
V
ENH
V
EN
= logic high (regulator enabled)
2.0
V
I
ENL
Enable Input Current
V
ENL
0.4V
0.01
1
A
V
ENL
0.18V
0.01
2
A
I
ENH
V
ENH
2.0V
5
20
A
25
Error Flag Output
V
ERR
Flag Threshold
undervoltage condition (below nominal)
2
6
10
%
Note 8
V
IL
Output Logic-Low Voltage
I
L
= 1mA, undervoltage condition
0.2
0.4
V
I
FL
Flag Leakage Current
flag off, V
FLAG
= 0V to 12V
1
0.1
+1
A
MIC5216
Micrel
MIC5216
4
January 2000
Block Diagrams
IN
EN
OUT
GND
V
REF
Bandgap
Ref.
C
OUT
V
OUT
V
IN
MIC5216-x.xBM5/MM
60mV
FLG
Flag
Error
Comparator
Current Limit
Threshold Shutdown
MIC5216 Fixed Regulator with External Components
Note 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,
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
)
JA
. Exceeding the maximum allowable power dissipa-
tion will result in excessive die temperature, and the regulator will go into thermal shutdown. See Table 1 and the "Thermal Considerations"
section for details.
Note 2:
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 3:
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load
range from 100mA to 500mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
Note 4:
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.
Note 5:
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.
Note 6:
V
EN
is the voltage externally applied to devices with the EN (enable) input pin.
Note 7:
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 500mA load pulse at V
IN
= 12V for t = 10ms.
Note 8:
The error flag comparator includes 3% hysteresis.
January 2000
5
MIC5216
MIC5216
Micrel
Typical Characteristics
-100
-80
-60
-40
-20
0
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
PSRR (dB)
FREQUENCY (Hz)
Power Supply
Rejection Ratio
I
OUT
= 100
A
C
OUT
= 1
F
V
IN
= 6V
V
OUT
= 5V
10
100
1k
10k 100k 1M 10M
-100
-80
-60
-40
-20
0
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
PSRR (dB)
FREQUENCY (Hz)
Power Supply
Rejection Ratio
I
OUT
= 1mA
C
OUT
= 1
F
V
IN
= 6V
V
OUT
= 5V
10
100
1k
10k 100k 1M 10M
-100
-80
-60
-40
-20
0
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
PSRR (dB)
FREQUENCY (Hz)
Power Supply
Rejection Ratio
I
OUT
= 100mA
C
OUT
= 1
F
V
IN
= 6V
V
OUT
= 5V
10
100
1k
10k 100k 1M 10M
0
10
20
30
40
50
60
0
0.1
0.2
0.3
0.4
RIPPLE REJECTION (dB)
VOLTAGE DROP (V)
Power Supply Ripple Rejection
vs. Voltage Drop
I
OUT
= 100mA
10mA
1mA
C
OUT
= 1
F
500mA pending
0.0001
0.001
0.01
0.1
1
10
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
NOISE (
V/
Hz)
FREQUENCY (Hz)
Noise Performance
10mA
1mA
100mA
10
100
1k
10k 100k 1M 10M
V
OUT
= 5V
C
OUT
= 10
F
electrolytic
500mA Pending
0.0001
0.001
0.01
0.1
1
10
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7
NOISE (
V/
Hz)
FREQUENCY (Hz)
Noise Performance
10
100
1k
10k 100k 1M 10M
10mA, C
OUT
= 1
F
V
OUT
= 5V
500mA Pending
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