Micrel MIC5208-3.6BMM Dual 50ma ldo regulator Datasheet

MIC5208
Micrel
MIC5208
Dual 50mA LDO Regulator
Final Information
General Description
Features
The MIC5208 is a dual linear voltage regulator with very low
dropout voltage (typically 20mV at light loads and 250mV at
50mA), very low ground current (225µA at 10mA output), and
better than 3% initial accuracy. It also features individual
logic-compatible enable/shutdown control inputs.
Designed especially for hand-held battery powered devices,
the MIC5208 can be switched by a CMOS or TTL compatible
logic signal, or the enable pin can be connected to the supply
input for 3-terminal operation. When disabled, power consumption drops nearly to zero. Dropout ground current is
minimized to prolong battery life.
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Key features include current limiting, overtemperature shutdown, and protection against reversed battery.
Applications
The MIC5208 is available in 3.0V, 3.3V, 3.6V, 4.0V and 5.0V
fixed voltage configurations. Other voltages are available;
contact Micrel for details.
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Micrel Mini 8™ MSOP package
Guaranteed 50mA output
Low quiescent current
Low dropout voltage
Wide selection of output voltages
Tight load and line regulation
Low temperature coefficient
Current and thermal limiting
Reversed input polarity protection
Zero off-mode current
Logic-controlled electronic enable
Cellular telephones
Laptop, notebook, and palmtop computers
Battery powered equipment
Bar code scanners
SMPS post regulator/dc-to-dc modules
High-efficiency linear power supplies
Ordering Information
Part Number
Voltage
Accuracy
Junction Temp. Range*
Package
MIC5208-3.0BMM
3.0
3%
–40°C to +125°C
8-lead MSOP
MIC5208-3.3BMM
3.3
3%
–40°C to +125°C
8-lead MSOP
MIC5208-3.6BMM
3.6
3%
–40°C to +125°C
8-lead MSOP
MIC5208-4.0BMM
4.0
3%
–40°C to +125°C
8-lead MSOP
MIC5208-5.0BMM
5.0
3%
–40°C to +125°C
8-lead MSOP
Other voltages available. Contact Micrel for details.
Typical Application
MIC5208
Output A
Output B
1µF
1µF
1
8
2
7
3
6
4
5
Enable A
Enable B
Enable may be connected to VIN
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
1997
1
MIC5208
MIC5208
Micrel
Pin Configuration
OUTA
1
8
INA
GND
2
7
ENA
OUTB
3
6
INB
GND
4
5
ENB
MIC5208BMM
Pin Description
Pin Number
Pin Name
1
OUTA
Regulator Output A
2, 4
GND
Ground: Both pins must be connected together.
3
OUTB
Regulator Output B
5
ENB
Enable/Shutdown B (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown. Do not leave floating.
6
INB
Supply Input B
7
ENA
Enable/Shutdown A (Input): CMOS compatible input. Logic high = enable,
logic low or open = shutdown. Do not leave floating.
8
INA
Supply Input A
MIC5208
Pin Function
2
1997
MIC5208
Micrel
Absolute Maximum Ratings
Recommended Operating Conditions
Supply Input Voltage (VIN) ............................ –20V to +20V
Enable Input Voltage (VEN) ........................... –20V to +20V
Power Dissipation (PD) ............................ Internally Limited
Storage Temperature Range ................... –60°C to +150°C
Lead Temperature (soldering, 5 sec.) ....................... 260°C
Supply Input Voltage (VIN) ............................... 2.5V to 16V
Enable Input Voltage (VEN) ................................. 0V to 16V
Junction Temperature (TJ) ....................... –40°C to +125°C
8-lead MSOP (θJA) ................................................... Note 1
Electrical Characteristics
VIN = VOUT + 1V; IL = 1mA; CL = 1µF, and VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C to +125°C;
for one-half of dual MIC5208; unless noted.
Symbol
Parameter
Conditions
Min
VO
Output Voltage
Accuracy
variation from nominal VOUT
∆VO/∆T
Output Voltage
Temperature Coeffcient
Note 2
∆VO/VO
Line Regulation
∆VO/VO
VIN – VO
Typical
Max
Units
3
4
%
%
50
200
ppm/°C
VIN = VOUT +1V to 16V
0.008
0.3
0.5
%
%
Load Regulation
IL = 0.1mA to 50mA, Note 3
0.08
0.3
0.5
%
%
Dropout Voltage, Note 4
IL = 100µA
IL = 20mA
IL = 50mA
20
200
250
350
500
mV
mV
mV
–3
–4
IQ
Quiescent Current
VEN ≤ 0.4V (shutdown)
0.01
10
µA
IGND
Ground Pin Current
Note 5
VEN ≥ 2.0V (enabled), IL = 100µA
IL = 20mA
IL = 50mA
180
225
850
750
1200
µA
µA
µA
IGNDDO
Ground Pin Current at Dropout
VIN = 0.5V less than designed VOUT, Note 5
200
300
µA
ILIMIT
Current Limit
VOUT = 0V
180
250
mA
∆VO/∆PD
Thermal Regulation
Note 6
0.05
Input Voltage Level
Logic Low
Logic High
shutdown
enabled
%/W
Control Input
VIL
VIH
0.6
V
V
1
50
µA
µA
2.0
VIL ≤ 0.6V
VIH ≥ 2.0V
IIL
IIH
Control Input Current
0.01
15
General Note:
Devices are ESD protected, however, handling precautions are recommended.
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 rated operating conditions. The maximum allowable power dissipation is a function of the maximum
junction temperature, TJ(max), the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable
power dissipation at any ambient temperature is calculated using: PMAX = (TJ(max) – TA) / θJA. Exceeding the maximum allowable power
dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. θJA of the 8-lead MSOP is 200°C/W,
mounted on a PC board.
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. 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:
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 50mA load pulse at VIN = 16V for t = 10ms.
1997
3
MIC5208
MIC5208
Micrel
Typical Characteristics
100
1000
500
VIN = VOUT + 1V
0
CIN = 10µF
COUT = 1µF
2.0
1.5
1.0
0.5
0.0
0
50
100
150
200
OUTPUT CURRENT (mA)
IL = 50mA
IL = 100µA
0.5
3.4
3.2
3.0
2.8
2.6
3 DEVICES
HI / AVG / LO
CURVES APPLICABLE
AT 100µA AND 50mA
2.4
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC5208
0
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
7
7
2.5
140
120
100
80
60
CIN = 10µF
COUT = 1µF
40
20
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
CIN = 10µF
COUT = 1µF
2.0
1.5
1.0
IL = 50mA
0.5
IL = 100µA
Thermal Regulation
(MIC5208-3.3)
160
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
60
40
20
0
-20
-40
-60
100
7
50
0
CL = 1µF
-50
-2 0 2 4 6 8 10 12 14 16
TIME (ms)
Short Circuit Current
vs. Temperature
Minimum Supply Voltage
vs. Temperature
3.5
200
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
3.6
VOUT = 3.3V
1.0
Output Voltage
vs. Temperature
CIN = 10µF
COUT = 1µF
CIN = 10µF
COUT = 1µF
Short Circuit Current
vs. Input Voltage
4.0
3.8
1
Ground Current
vs. Temperature
∆ OUTPUT (mV)
2.5
IL = 50mA
3.0
1.5
0.0
SHORT CIRCUIT CURRENT (mA)
OUTPUT VOLTAGE (V)
3.0
2
0
2.0
Output Voltage
vs. Output Current
3.5
IL = 100µA
3
Ground Current
vs. Supply Voltage
10 20 30 40 50 60 70 80
OUTPUT CURRENT (mA)
4.0
IL = 100µA
IL = 1mA
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
0.1
1
10
100
OUTPUT CURRENT (mA)
1500
OUTPUT VOLTAGE (V)
200
Ground Current
vs. Output Current
2000
GROUND CURRENT (µA)
IL = 50mA
180
160
CIN = 10µF
COUT = 1µF
140
120
100
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
4
MIN. SUPPLY VOLTAGE (V)
1
0.01
300
GROUND CURRENT (mA)
10
4
CIN = 10µF
COUT = 1µF
LOAD (mA)
100
Dropout Characteristics
(MIC5208-3.3)
400
DROPOUT VOLTAGE (mV)
CIN = 10µF
COUT = 1µF
GROUND CURRENT (mA)
DROPOUT VOLTAGE (V)
1000
0
Dropout Voltage
vs. Temperature
Dropout Voltage
vs. Output Current
IL = 1mA
VOUT = 3.3V
3.4
CIN = 10µF
COUT = 1µF
3.3
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
1997
MIC5208
Micrel
Typical Characteristics
Output Impedance
Load Transient
IL = 100µA
IL = 1mA
1
0
COUT = 1µF
VIN = VOUT + 1
-200
100
-400
50
0
-50
-1 0
1x106
100x103
1x103
100x100
1x100
0.01
10x103
IL = 50mA
0.1
Load Transient
200
OUTPUT (mA) ∆ OUTPUT (mV)
10
OUTPUT (mA) ∆ OUTPUT (mV)
100
10x100
OUTPUT IMPEDANCE (Ω)
1000
1
2 3 4 5
TIME (ms)
6
7
8
100
0
COUT = 10µF
VIN = VOUT + 1
-100
100
-200
50
0
-50
-5
0
5
10
TIME (ms)
15
20
FREQUENCY (Hz)
Ripple Voltage
vs. Frequency
Line Transient
(MIC5208-3.3)
60
3
2
CL = 1µF
IL = 1mA
1
0
-1
INPUT (V)
0
8
-1
6
4
2
-0.2 0.0
1x106
100x10
3
10x103
10x100
0
1x103
20
IL = 100µA
CL = 1µF
VIN = VOUT + 1
CL = 11µF
IL = 1mA
1
INPUT (V)
8
-2
40
2
∆ OUTPUT (V)
∆ OUTPUT (V)
80
100x100
RIPPLE VOLTAGE (dB)
100
Line Transient
(MIC5208-3.3)
0.2 0.4 0.6
TIME (ms)
0.8
6
4
2
-0.2 0.0
1.0
0.2 0.4 0.6
TIME (ms)
0.8
1.0
FREQUENCY (Hz)
Enable Characteristics
(MIC5208-3.3)
Ripple Voltage
vs. Frequency
ENABLE (V)
40
CL = 1µF
IL = 100µA
0.0
4
-1.0
2
0
-2
-2
1x106
100x10
3
10x103
10x100
0
1x103
20
IL = 1mA
CL = 1µF
VIN = VOUT + 1
2.0
1.0
OUTPUT (V)
60
4.0
3.0
ENABLE (V)
OUTPUT (V)
80
100x100
RIPPLE VOLTAGE (dB)
100
Enable Characteristics
(MIC5208-3.3)
0
2
4
6
TIME (µs)
8
5
4
3
2
1
0
4
-1
CL = 1µF
IL = 100µA
2
0
-2
-0.2 0.0
10
0.2 0.4 0.6
TIME (ms)
0.8
1.0
FREQUENCY (Hz)
Enable Voltage
vs. Temperature
Ripple Voltage
vs. Frequency
40
1x106
100x10
3
10x103
1x103
10x100
0
IL = 50mA
CL = 1µF
VIN = VOUT + 1
40
CIN = 10µF
COUT = 1µF
IL = 1mA
1.25
1.00
VOFF
VON
0.75
0.50
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
ENABLE CURRENT (µA)
ENABLE VOLTAGE (mV)
60
100x100
RIPPLE VOLTAGE (dB)
80
20
Enable Current
vs. Temperature
1.50
100
CIN = 10µF
COUT = 1µF
IL = 1mA
30
20
10
VEN = 5V
VEN = 2V
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
FREQUENCY (Hz)
1997
5
MIC5208
MIC5208
Micrel
Applications Information
No-Load Stability
Supply/Ground
The MIC5208 will remain stable and in regulation with no load
(other than the internal voltage divider) unlike many other
voltage regulators. This is especially important in CMOS RAM
keep-alive applications.
Both MIC5208 GND pins must be connected to the same
ground potential. INA and INB can each be connected to a
different supply.
Enable/Shutdown
ENA (enable/shutdown) and ENB may be enabled separately. Forcing ENA/B high (> 2V) enables the associated
regulator. ENA/B requires a small amount of current, typically
15µA. While the logic threshold is TTL/CMOS compatible,
ENA/B may be forced as high as 20V, independent of VIN.
Input Capacitor
A 0.1µF capacitor should be placed from IN to GND if there is
more than 10 inches of wire between the input and the ac filter
capacitor or if a battery is used as the input.
Output Capacitor
An output capacitor is required between OUT and GND to
prevent oscillation. Larger values improve the regulator’s
transient response. The output capacitor value may be increased without limit.
The output capacitor should have an ESR (effective series
resistance) of about 5Ω or less and a resonant frequency
above 500kHz. Most tantalum or aluminum electrolytic capacitors are adequate; film types will work, but are more
expensive. Since many aluminum electrolytics have electrolytes that freeze at about –30°C, solid tantalums are recommended for operation below –25°C.
Thermal Shutdown
Thermal shutdown is independent on both halves of the dual
MIC5208, however, an overtemperature condition in one half
may affect the other half because of proximity.
Thermal Considerations
Multilayer boards having a ground plane, wide traces near the
pads, and large supply bus lines provide better thermal
conductivity.
The MIC5208-xxBMM (8-lead MSOP) has a thermal resistance of 200°C/W when mounted on a FR4 board with
minimum trace widths and no ground plane.
PC Board
Dielectric
θJA
FR4
200°C
MSOP Thermal Characteristics
For additional heat sink characteristics, please refer to Micrel
Application Hint 17, “Calculating P.C. Board Heat Sink Area
For Surface Mount Packages”.
At lower values of output current, less output capacitance is
required for output stability. The capacitor can be reduced to
0.22µF for current below 10mA or 0.1µF for currents below
1mA.
MIC5208
6
1997
MIC5208
Micrel
Package Information
0.122 (3.10)
0.112 (2.84)
0.199 (5.05)
0.187 (4.74)
DIMENSIONS:
INCH (MM)
0.120 (3.05)
0.116 (2.95)
0.036 (0.90)
0.032 (0.81)
0.043 (1.09)
0.038 (0.97)
0.012 (0.30) R
0.012 (0.03)
0.0256 (0.65) TYP
0.008 (0.20)
0.004 (0.10)
5° MAX
0° MIN
0.007 (0.18)
0.005 (0.13)
0.012 (0.03) R
0.039 (0.99)
0.035 (0.89)
0.021 (0.53)
8-Pin MSOP (MM)
1997
7
MIC5208
MIC5208
Micrel
MICREL INC. 1849 FORTUNE DRIVE
TEL
+ 1 (408) 944-0800
FAX
SAN JOSE, CA 95131
+ 1 (408) 944-0970
WEB
USA
http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 1997 Micrel Incorporated
MIC5208
8
1997
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