MIC5216
Micrel
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 MM8™ 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 MM8™ 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
MIC5216-3.0BMM
MIC5216-3.3BMM
MIC5216-3.6BMM
MIC5216-5.0BMM
MIC5216-3.0BM5
MIC5216-3.3BM5
MIC5216-3.6BM5
MIC5216-5.0BM5
Marking
—
—
—
—
LH30
LH33
LH36
LH50
Volts
3.0V
3.3V
3.6V
5.0V
3.0V
3.3V
3.6V
5.0V
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
Package
MSOP-8
MSOP-8
MSOP-8
MSOP-8
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Typical Applications
MIC5216-5.0BMM
1
8
7
6
5
V
IN
6V
100k
Flag
V
OUT
5V
MIC5216-3.3BM5
V
IN
4V
ENABLE
SHUTDOWN
1
2
3
4
5
2
3
4
V
OUT
3.3V
100k
1.0µF
tantalum
Flag
1.0µF
tantalum
5V Low-Noise Regulator
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
January 2000
1
MIC5216
MIC5216
Micrel
Pin Configuration
EN 1
IN 2
OUT 3
FLG 4
8
7
6
5
GND
GND
GND
GND
EN GND IN
3
2
1
LHxx
4
5
FLG
OUT
MIC5216-x.xBMM
MM8™ MSOP-8
Fixed Voltages
MIC5216-x.xBM5
SOT-23-5
Fixed Voltages
Pin Description
Pin No.
MSOP-8
2
5–8
3
1
4
Pin No.
SOT-23-5
1
2
5
3
4
Pin Name
IN
GND
OUT
EN
FLG
Pin Function
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.
Error Flag (Output): Open-Collector output. Active low indicates an output
undervoltage condition.
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
MIC5216
2
January 2000
MIC5216
Micrel
Electrical Characteristics
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.
Symbol
V
OUT
∆V
OUT
/∆T
∆V
OUT
/V
OUT
∆V
OUT
/V
OUT
V
IN
– V
OUT
Parameter
Output Voltage Accuracy
Output Voltage
Temperature Coefficient
Line Regulation
Load Regulation
Dropout Voltage,
Note 4
Conditions
variation from nominal V
OUT
Note 2
V
IN
= V
OUT
+ 1V to 12V
I
OUT
= 100µA to 500mA
Note 3
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 150mA
I
OUT
= 500mA
I
GND
Ground Pin Current,
Notes 5, 6
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,
Note 6
PSRR
I
LIMIT
∆V
OUT
/∆P
D
e
no
V
ENL
V
ENH
I
ENL
I
ENH
Error Flag Output
V
ERR
V
IL
I
FL
Flag Threshold
Output Logic-Low Voltage
Flag Leakage Current
undervoltage condition (below nominal)
Note 8
I
L
= 1mA, undervoltage condition
flag off, V
FLAG
= 0V to 12V
–1
–2
–6
0.2
0.1
–10
0.4
+1
%
V
µA
Enable Input Current
Ripple Rejection
Current Limit
Thermal Regulation
Output Noise
V
EN
≤
0.4V
V
EN
≤
0.18V
f = 120Hz
V
OUT
= 0V
Note 7
I
OUT
= 50mA, C
OUT
= 2.2µF
V
EN
= logic low (regulator shutdown)
V
EN
= logic high (regulator enabled)
V
ENL
≤
0.4V
V
ENL
≤
0.18V
V
ENH
≥
2.0V
2.0
0.01
0.01
5
–1
–2
20
25
Min
–1
–2
40
0.009
0.05
10
115
165
300
80
350
1.8
8
0.05
0.10
75
700
0.05
500
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
%
mV
mV
mV
mV
µA
µA
mA
mA
µA
µA
dB
mA
%/W
nV/ Hz
ENABLE Input
Enable Input Voltage
0.4
0.18
V
V
µA
µA
µA
January 2000
3
MIC5216
MIC5216
Note 1:
Micrel
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. See Table 1 and the “Thermal Considerations”
section for 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 100mA to 500mA. 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.
V
EN
is the voltage externally applied to devices with the EN (enable) input pin.
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.
The error flag comparator includes 3% hysteresis.
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Block Diagrams
V
IN
IN
Current Limit
Threshold Shutdown
OUT
C
OUT
V
OUT
Bandgap
Ref.
V
REF
EN
FLG
Flag
60mV
Error
Comparator
MIC5216-x.xBM5/MM
GND
MIC5216 Fixed Regulator with External Components
MIC5216
4
January 2000
MIC5216
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
= 100mA
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 Ripple Rejection
vs. Voltage Drop
60
RIPPLE REJECTION (dB)
500mA pending
50
40
30
20
10
C
OUT
= 1µF
0
0
0.1
0.2
0.3
VOLTAGE DROP (V)
0.4
NOISE (µV/√Hz)
1mA
1
10
Noise Performance
10
10mA, C
OUT
= 1µF
1
NOISE (µV/√Hz)
0.1
Noise Performance
100mA
10mA
500mA Pending
0.1
0.01 500mA Pending
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)
10mA
I
OUT
= 100mA
0.01
0.001
V
OUT
= 5V
C
OUT
= 10µF
electrolytic
1mA
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)
January 2000
5
MIC5216
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