MIC5283 - Micrel

MIC5283
120VIN, 150mA, Ultra-Low IQ, High-PSRR
Linear Regulator
General Description
Features
The MIC5283 high-performance linear regulator offers a
very-wide input operating voltage range, up to 120V DC,
and supplies an output current of up to 150mA.
Ideal for high input voltage applications such as industrial
and telecom, the MIC5283 offers ±3% initial accuracy,
extremely high-power supply rejection ratio (75dB at
10kHz) and an ultra-low quiescent current of 8µA. The
MIC5283 is optimized for high-voltage line transients,
making it ideal for harsh environment applications.
The MIC5283 is offered in both fixed output voltage (3.3V
or 5.0V) and adjustable output voltage (1.22V to 5.5V)
options.





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The MIC5283 operates over a 40°C to +125°C
temperature range and is available in lead-free, RoHS®
compliant, ePad SOIC-8 and 3mm x 3mm MLF
packages.
Data sheet and support documentation are found on the
Micrel website: www.micrel.com.
Wide input voltage range: 6V to 120V DC
Ultra-low quiescent current: 8µA
150mA guaranteed output current
Adjustable output from 1.22V to 5.5V
Stable with ceramic capacitors
Ultra-high PSRR (75dB at 10kHz)
Ultra-high line rejection (load dump)
High output accuracy:
– ±3% initial accuracy
 Thermal-shutdown and current-limit protection
 Thermally-efficient, 8-pin ePad SOIC package
®
 Very low-profile 3mm x 3mm MLF package
Applications
 Industrial applications
 Remote keyless entry power supply
 Telecom applications
 Off-line power supplies
___________________________________________________________________________________________________________
Typical Applications
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
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MIC5283
Ordering Information
Part Number
Output Voltage
Top Mark
Temperature Range
Package
Lead Finish
MIC5283YME
Adjustable
5283YME
–40C to 125C
8-Pin ePad SOIC
Pb-Free
MIC5283-3.3YME
3.3V
5283-33YME
–40C to 125C
8-Pin ePad SOIC
Pb-Free
MIC5283-5.0YME
5.0V
5283-50YME
–40C to 125C
8-Pin ePad SOIC
Pb-Free
MIC5283YML
Adjustable
A83
MIC5283-3.3YML
3.3V
8S3
MIC5283-5.0YML
5.0V
583
–40C to 125C
®
Pb-Free
®
3mmx3mm MLF -8L
–40C to 125C
3mmx3mm MLF -8L
Pb-Free
–40C to 125C
3mmx3mm MLF®-8L
Pb-Free
Pin Configuration
March 2012
8-Pin ePAD SOIC
MIC5283-x.xYME
Fixed Voltage Output
3mm x 3mm MLF®-8L
MIC5283-x.xYML
Fixed Voltage Output
(TOP VIEW)
(TOP VIEW)
8-Pin ePAD SOIC
MIC5283YME
Adjustable Voltage Output
3mm x 3mm MLF®-8L
MIC5283YML
Adjustable Voltage Output
(TOP VIEW)
(TOP VIEW)
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MIC5283
Pin Description
Pin Number
Adjustable
Output
Fixed Output
Name
Function
1
1
VIN
Supply Voltage Input. Connect 1µF capacitor from VIN to GND.
2, 3, 7
2, 3, 7
NC
Not internally connected. Connect NC to GND or leave unconnected.
4
4
CPSRR
5
5
GND
6
—
FB
—
6
SNS
8
8
VOUT
EP
EP
EP
March 2012
Bypass Capacitor Connection. Connect 0.1µF capacitor from CPSRR to GND.
Ground.
Feedback Connection. For external resistor divider to set VOUT.
Sense input. Connect SNS to VOUT.
Regulator Output. Connect 10µF capacitor from VOUT to GND.
Exposed Pad (ePad) for Thermal Dissipation. Connect EP to GND.
3
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MIC5283
Absolute Maximum Ratings(1)
VIN to GND................................................... –0.3V to +125V
VCPSRR to GND..................................................–0.3 to +14V
VFB, VSNS, VOUT to GND ................................... –0.3V to +6V
Lead Temperature (soldering, 10s).......................... +260°C
Junction Temperature ......................... –40°C  TJ  +125°C
Storage Temperature .........................–65°C  TA  +150°C
ESD Ratings(4)
HBM ......................................................................... 2kV
MM .........................................................................200V
Operating Ratings(2)
VIN ................................................................. +6V to +120V
VOUT Adjust Range ..................................... +1.22V to +5.5V
Junction Temperature ......................... –40°C  TJ  +125°C
Power Dissipation (PD)........................... Internally Limited(3)
Junction Thermal Resistance (JA)
8-pin ePad SOIC ...............................................41°C/W
3mm x 3mm MLF®-8..........................................60°C/W
Electrical Characteristics(5)
VIN = 12V, CIN = 1.0µF, CPSRR = 0.1µF, COUT = 10µF, VOUT = 5.0V or 3.3V, IOUT = 100µA, TA = 25°C, bold values indicate –40°C  TJ 
+125°C, unless noted.
Parameter
Condition
Min.
Typ.
Max.
Units
120
V
14
µA
Power Supply Input
Input Voltage Range
Quiescent Supply Current
6
IOUT = 0
8
Output Voltage
Output Voltage Accuracy
(6)
Line Regulation
Variation from nominal VOUT
-3
+3
%
100µA ≤ IOUT ≤ 150mA
-5
+5
%
%/V
10V ≤ VIN ≤ 120V
-0.5
0.04
+0.5
1.183
1.220
1.256
1.159
1.220
1.281
Feedback Input (Adjustable)
FB Voltage
100µA ≤ IOUT ≤ 150mA
FB Current
VFB = 1.22V
3.2
V
nA
Current Limit
Current Limit
VOUT = 0V
180
300
500
mA
Ripple Rejection
Power Supply Rejection Ratio
IOUT = 50mA
100Hz ≤ f ≤ 1kHz
70
dB
1kHz < f ≤ 30kHz
75
dB
30kHz < f ≤ 100kHz
65
dB
Power Dropout Voltage
Dropout Voltage
IOUT = 150mA
1.8
TJ rising
155
C
15
C
2.8
V
Thermal Protection
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
Notes:
1.
Exceeding an absolute maximum rating may damage the device.
2.
The device is not guaranteed to function outside its operating rating.
3.
The maximum allowable power dissipation at any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum allowable power
dissipation results in excessive die temperature, and causes the regulator to enter thermal shutdown.
4.
Devices are ESD sensitive; use proper handling precautions.
5.
Specifications are for packaged products only.
6.
Line regulation is a percentage of VOUT.
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MIC5283
Typical Characteristics
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Typical Characteristics (Continued)
Case Temperature*: The temperature measurement was taken at the hottest point on the MIC5283 case mounted on a 2.25 square inch PCB at an
ambient temperature of 25°C; see “Thermal Measurement” section. Actual results will depend upon the size of the PCB, ambient temperature and
proximity to other heat emitting components.
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Functional Characteristics
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Functional Characteristics (Continued)
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Detailed Description
The MIC5283 voltage regulator accepts a 6V to 120V input
voltage and has an ultra-low 8µA typical quiescent current
while offering an excellent line transient response and
PSRR. These features make it ideal for harsh, noisy
environments. All options offer 150mA of output current.
The MIC5283YML and MIC5283YME offer an adjustable
output voltage from 1.22V to 5.5V. The MIC5283-3.3YML
and MIC5283-3.3YME offer fixed 3.3V outputs and the
MIC5283-5.0YML and MIC5283-5.0YME offer fixed 5.0V
outputs. The YME packaged devices feature a heat slug to
more effectively remove heat from the die.
MIC5283
Output Voltage Setting
For the MIC5283YML and MIC5283YME, VOUT is
programmable from 1.22V to 5.5V using an external
resistive divider. VOUT is set using the following equation:
 R1 
VOUT  VREF  
 1
 R2 
where VREF = 1.22V, and R1 and R2 form the feedback
voltage divider from VOUT to ground.
Applications Information
Thermal Protection
The MIC5283 has internal thermal shutdown to protect it
from excessive heating of the die. When the junction
temperature exceeds approximately +155°C, the output is
disabled and the device begins to cool down. The device
turns back on when the junction temperature cools by
15°C. This will result in a cycled output during continuous
thermal-overload conditions.
Current Limit
The MIC5283 features output current-limit protection. The
output sustains a continuous short circuit to GND without
damage to the device, but thermal shutdown often results.
The typical value for the current limit of the MIC5283 is
300mA.
Input Capacitor
Connect a 1.0µF capacitor from VIN to GND. Micrel
recommends the C5750X7R2E105M, 1.0µF, 250V
capacitor made by TDK. When using a different capacitor,
assure that the voltage rating of the capacitor has
adequate headroom to withstand any potential transient.
CPSRR Capacitor
To maintain high power supply rejection, connect a 0.1µF
capacitor from CPSRR to GND. The voltage rating of the
capacitor must be at least 14V.
Thermal Measurements
It is always prudent to measure an IC’s case temperature
to make sure that it is within operating limits, but it is easy
to get erroneous results. The standard thermocouple that
comes with many voltage meters uses a large wire gauge
that behaves like a heat-sink, resulting in artificially low
case temperature measurements. Use a thermocouple of
36-gauge wire or smaller, such as the Omega (5SC-TT-K36-36), to minimize the heat-sinking effect. Also, apply a
thermal compound to maximize heat transfer between the
IC and the thermocouple.
An infrared thermometer is a recommended alternative.
The IR thermometer from Optris has a 1mm spot size,
ideal for monitoring small surface mount packages. Also,
the optional stand makes it easy to keep the beam on the
IC for long periods of time.
Output Capacitor
Connect a 10µF capacitor from VOUT to GND. Assure that
the voltage rating of the capacitor exceeds the designed
output voltage of the MIC5283.
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Functional Diagram
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MIC5283 Evaluation Board Schematic
MIC5283 Evaluation Board Schematic
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Bill of Materials
Item
C1
C2
Part Number
C5750X7R2E105M
08053C104KAT2A
Manufacturer
TDK(1)
Description
Qty.
1.0µF, 250V, 20%, X7R capacitor (2220)
1
(2)
0.1µF 25V 20%, X7R capacitor (0805)
1
(2)
AVX
C3
0805ZD106KAT2A
10µF, 10V, 20%, X5R, capacitor (0805)
1
R1
CRCW06030000F
Vishay/Dale(3)
0, 1% resistor, 0603
1
R2
CRCW06032942F
Vishay/Dale(3)
R3
R4
CRCW06039531F
CRCW06031742F
AVX
29.4k, 1% resistor, 0603
1
(3)
9.53kΩ Film Resistor, Size 0603, 1%
1
(3)
17.4kΩ Film Resistor, Size 0603, 1%
1
(3)
Vishay
Vishay
R5
CRCW06032802F
Vishay
28.0kΩ Film Resistor, Size 0603, 1%
1
R6
CRCW06036192F
Vishay(3)
61.9kΩ Film Resistor, Size 0603, 1%
1
120VIN, 150mA, Ultra-Low IQ, High-PSRR Linear Regulator
1
U1
MIC5283YML
Micrel
(4)
Notes:
1. TDK: www.tdk.com.
2. AVX.: www.avx.com.
3. Vishay Tel: www.vishay.com.
4. Micrel, Inc.: www.micrel.com.
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PCB Evaluation Board Layout
Top Layer
Bottom Layer
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PCB Evaluation Board Layout (Continued)
EV Board Dimensions
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Package Information
8-Pin Exposed Pad SOIC (ME)
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Package Information (Continued)
8-Pin 3mmx3mm MLF® (ML)
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MIC5283
Recommended Land Pattern
8-Pin Exposed Pad SOIC
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Recommended Land Pattern (Continued)
8-Pin 3mm x 3mm MLF®
Red circle indicates Thermal Via. Size should be .300mm  .350mm in diameter, 1.00mm pitch, and it should be
connected to GND plane for maximum thermal performance.
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MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2012 Micrel, Incorporated.
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