MAQ5281
120V
IN
, 25mA, Ultra-Low I
Q
, High-PSRR
Linear Regulator
Automotive
General Description
The MAQ5281 high-performance linear regulator offers a
very-wide input operating voltage range, up to 120V DC,
and supplies an output current of up to 25mA.
Ideal for high input voltage applications such as
automotive, industrial and telecom, the MAQ5281 offers
±3% initial accuracy, extremely high-power supply
rejection ratio (>90db) and ultra-low quiescent current of
6µA. The MAQ5281 is optimized for high-voltage line
transients, making it ideal for harsh environment
applications.
The MAQ5281 is offered in both fixed output voltage
(3.3V/5.0V) and adjustable output voltage (1.27V to 5.5V)
options.
The MAQ5281 operates over a
40ºC
to +125ºC
temperature range and is available in lead-free, RoHS-
compliant, 8-pin ePad MSOP package. This part is also
AEC-Q100 qualified for automotive applications.
Data sheet and support documentation are found on the
Micrel website:
www.micrel.com.
Features
AEC-Q100 qualified
Wide input voltage range: 6V to 120V DC
Ultra-low quiescent current: 6µA (typ)
25mA guaranteed output current
Adjustable output from 1.27V to 5.5V
Withstands up to +120V DC at the input
Stable with ceramic capacitors
Ultra-high PSRR >90dB
Ultra-high line transient rejection (load dump)
High output accuracy:
– ±3% initial accuracy
Thermal-shutdown and current-limit protection
Thermally-efficient, 8-pin ePad MSOP package
Applications
Automotive
Remote keyless entry power supply
Telecom applications
___________________________________________________________________________________________________________
Typical Applications
Quiescent Supply Current
vs. Input Voltage
12
QUIESCENT CURRENT (µA)
11
10
9
8
7
6
5
4
3
2
1
0
0
20
40
60
80
100
120
V
OUT
= 5V
I
OUT
= 0
INPUT VOLTAGE (V)
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
July 2012
M9999-071112-A
Micrel, Inc.
MAQ5281
Ordering Information
Part Number
MAQ5281YMME
MAQ5281-3.3YMME
MAQ5281-5.0YMME
Output Voltage
Adjustable
3.3V
5.0V
Top Mark
7Q1A
7Q1S
7Q15
Temperature Range
–40C to
125C
–40C to
125C
–40C to
125C
Package
8-Pin ePad MSOP
8-Pin ePad MSOP
8-Pin ePad MSOP
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pin Configuration
8-Pin ePAD MSOP
MAQ5281-x.xYMME
(TOP VIEW)
8-Pin ePAD MSOP
MAQ5281YMME
(TOP VIEW)
Pin Description
MAQ5281YMME
1
2, 3, 7
4
5
6
8
EP
Pin
MAQ5281-x.xYMME
1
2, 3, 7
4
5
6
8
EP
Name
VIN
NC
CPSRR
GND
FB
SNS
VOUT
ePad
Function
Supply Voltage Input. Connect 1µF capacitor from VIN to GND.
Not internally connected. Connect NC to GND or leave unconnected.
Bypass Capacitor Connection. Connect 0.1µF capacitor from CPSRR to
GND.
Ground.
Feedback Connection. For external resistor divider to set V
OUT
.
Sense input. Connect SNS to VOUT.
Regulator Output. Connect 10µF capacitor from VOUT to GND.
Exposed Pad (ePad) for Thermal Relief. Connect EP to GND.
July 2012
2
M9999-071112-A
Micrel, Inc.
MAQ5281
Absolute Maximum Ratings
(1)
V
IN
to GND................................................... –0.3V to +125V
V
CPSRR
to GND..................................................–0.3 to +14V
V
FB
, V
SNS
, V
OUT
to GND ................................... –0.3V to +6V
Power Dissipation (P
D
) ........................... Internally Limited
(3)
Lead Temperature (soldering, 10s).......................... +260°C
Junction Temperature ......................... –40°C
T
J
+125°C
Storage Temperature .........................–65°C
T
A
+150°C
ESD Ratings
(4)
HBM ......................................................................... 2kV
MM .........................................................................200V
Operating Ratings
(2)
V
IN
................................................................. +6V to +120V
V
OUT
Adjust Range ..................................... +1.27V to +5.5V
Junction Temperature ......................... –40°C
T
J
+125°C
Junction Thermal Resistance (
JA
)
8-pin ePad MSOP..............................................64°C/W
Electrical Characteristics
(5)
V
IN
= 12V, C
IN
= 1.0µF, C
PSRR
= 0.1µF, C
OUT
= 10µF, I
OUT
= 100µA, T
A
= 25C,
bold
values indicate –40C
T
J
+125C, unless noted.
Parameter
Power Supply Input
Input Voltage Range
(6)
Quiescent Supply Current
(7)
Output Voltage
Adjustable
Output Voltage
Fixed 3.3V
Fixed 5.0V
Output Voltage Accuracy
Load Regulation
Line Regulation
(8)
Feedback Input (Adjustable)
FB Voltage
FB Current
Current Limit
Current Limit
Ripple Rejection
Power Supply Rejection Ratio
f = 20kHz to 2MHz
90
dB
V
OUT
= 0V
30
65
130
mA
V
FB
= 1.27V
1.232
1.206
1.270
1.270
3.2
1.308
1.333
V
nA
Variation from nominal V
OUT
I
OUT
= 100µA to 25mA
V
IN
= 10V to 120V
1.27
3.2
3.13
4.85
4.75
3
5
1.0
0.5
0.2
0.04
3.3
3.3
5.0
5.0
5.5
3.4
3.47
5.15
5.25
+3
+5
+1.0
+0.5
%
%
%
%/V
V
I
OUT
= 0
6
6
120
11
V
µA
Condition
Min.
Typ.
Max.
Units
July 2012
3
M9999-071112-A
Micrel, Inc.
MAQ5281
Electrical Characteristics
(5)
(Continued)
V
IN
= 12V, C
IN
= 1.0µF, C
PSRR
= 0.1µF, C
OUT
= 10µF, I
OUT
= 100µA, T
A
= 25C,
bold
values indicate –40C
T
J
+125C, unless noted.
Parameter
Power Dropout Voltage
Dropout Voltage
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
The maximum allowable power dissipation at any T
A
(ambient temperature) is P
D(max)
= (T
J(max)
– T
A
) /
θ
JA
. Exceeding the maximum allowable power
dissipation results in excessive die temperature, and causes the regulator to enter thermal shutdown.
Devices are ESD sensitive; use proper handling precautions. Human body model, 1.5kΩ in series with 100pF.
Specifications are for packaged products only.
Assure that V
IN
(V
OUT
+ 3V) and V
IN
6V.
Quiescent current is specified for the adjustable option. Fixed output options will add approximately 1µA due to the internal feedback resistors.
Line regulation is a percentage of V
OUT
.
Condition
I
OUT
= 25mA
T
J
rising
Min.
Typ.
2
157
15
Max.
3
Units
V
C
C
July 2012
4
M9999-071112-A
Micrel, Inc.
MAQ5281
Typical Characteristics
Quiescent Supply Current
vs. Input Voltage
V
OUT
= 5V
I
OUT
= 0
11.0
11.0
10.0
Quiescent Supply Current
vs. Temperature
V
IN
= 12V
V
OUT
= 5V
5.15
5.10
5.05
5.00
4.95
4.90
4.85
Output Voltage
vs. Input Voltage
V
IN
= 12V
V
OUT
= 5V
I
OUT
= 5mA
QUIESCENT CURRENT (µA)
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0
QUIESCENT CURRENT (µA)
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
-50
-25
0
25
50
75
100
125
OUTPUT VOLTAGE (V)
9.0
I
OUT
= 0mA
20
40
60
80
100
120
0
20
40
60
80
100
120
INPUT VOLTAGE (V)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
Output Voltage
vs. Output Current
5.25
5.20
V
IN
= 12V
V
OUT
= 5V
Output Voltage
vs. Temperature
5.25
5.20
V
IN
= 12V
3.00
Dropout Voltage
vs. Output Current
V
OUT
= 5V
ADJUSTABLE OPTION
DROPOUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
0
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
V
OUT
= 5V
I
OUT
= 5mA
2.50
2.00
1.50
1.00
0.50
0.00
5
10
15
20
25
-50
-25
0
25
50
75
100
125
0
5
10
15
20
25
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
Dropout Voltage
vs. Temperature
2.4
1.31
FB Voltage
vs. Input Voltage
5.0
V
OUT
= 5V
1.30
FB Current
vs. Input Voltage
4.5
V
OUT
= 5V
V
FB
= 1.267V
DROPOUT VOLTAGE (V)
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
-50
-25
0
25
50
V
OUT
= 5V
FB VOLTAGE (V)
1.29
1.28
1.27
1.26
1.25
1.24
1.23
FB CURRENT (nA)
40
60
80
100
120
I
OUT
= 25mA
I
OUT
= 5mA
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
75
100
125
0
20
0
20
40
60
80
100
120
TEMPERATURE (°C)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
July 2012
5
M9999-071112-A
单片机
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