MIC59150 DATA SHEET (11/09/2015) DOWNLOAD

MIC59150
Ultra High Speed 1.5A LDO
General Description
Features
The MIC59150 is a high-bandwidth, low-dropout, 1.5A
linear voltage regulator ideal for powering core voltages of
low-power microprocessors. The MIC59150 implements a
dual supply configuration allowing for a very low output
impedance and a very fast transient response.
The MIC59150 requires a bias input supply and a main
input supply, allowing for ultra-low input voltages on the
main supply rail. The device operates from an input supply
of 1.0V to 3.8V and bias supply between 3V and 5.5V. The
MIC59150 offers adjustable output voltages down to 0.5V.
The MIC59150 requires a minimum output capacitance for
stability, working optimally with small ceramic capacitors.
The MIC59150 is available in an 8-pin EPAD SOIC
package and its junction temperature range is –40°C to
+125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• Input voltage range:
– VIN = 1.0V to 3.8V
– VBIAS = 3.0V to 5.5V
• Stable with 1µF ceramic capacitor
• Maximum dropout voltage of 250mV over temperature
• Adjustable output voltage down to 0.5V
• Ultra fast transient response
• Excellent line and load regulation specifications
• Logic controlled shutdown option
• Thermal shutdown and current limit protection
• Junction temperature range: –40°C to +125°C
• 8-pin EPAD SOIC
Applications
•
•
•
•
•
•
•
Telecommunications processors
Graphics processors
Computer peripheral cards
Logic IC power supply
SMPS post regulators
Microprocessors
Digital TV’s
_________________________________________________________________________________________________________
Typical Application
MIC59150YME
VIN
CIN=1µF
(Ceramic)
VBIAS
VIN
VOUT
VOUT
R1
VBIAS
EN
CBIAS=1µF
(Ceramic)
COUT=1µF
(Ceramic)
ADJ
EN
GND
R2
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
December 2008
M9999-121808-A
Micrel, Inc.
MIC59150
Ordering Information
Part Number
Voltage(1)
Junction Temperature Range
Package
Lead Finish
MIC59150YME
Adj.
–40°C to +125°C
8-Pin EPAD SOIC
RoHS Compliant
Note:
1. Other Voltage available. Contact Micrel for detail.
Pin Configuration
8 GND
EN 1
VBIAS 2
7 ADJ
VIN 3
6 VIN
5 VOUT
VOUT 4
8-Pin EPAD SOIC (ME)
Pin Description
Pin Number
Pin Name
1
EN
Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown.
2
VBIAS
Input bias voltage for powering all circuitry on the regulator with the exception of the
output power device.
3, 6
VIN
4, 5
VOUT
7
ADJ
Adjustable regulator feedback input. Connect to resistor voltage divider.
8
GND
Ground.
December 2008
Pin Function
Input voltage needed for the output power device.
Regulator Output.
2
M9999-121808-A
Micrel, Inc.
MIC59150
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN) ........................................ –0.3V to +4V
Bias Supply Voltage (VBIAS)............................. –0.3V to +6V
Enable Input Voltage (VEN)............................. –0.3V to VBIAS
Power Dissipation .....................................Internally Limited
Storage Temperature (Ts) .........................–65°C to +150°C
ESD Rating(3) ................................................................+3kV
Supply Voltage (VIN)............................................ 1V to 3.8V
Bias Supply Voltage (VBIAS)................................. 3V to 5.5V
Enable Input Voltage (VEN).................................. 0V to VBIAS
Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C
Package Thermal Resistance
EPAD SOIC (θJA) ...............................................41°C/W
Electrical Characteristics(4)
TA = 25°C with VBIAS = VOUT + 2.2V; VIN = VOUT + 1V; bold values indicate 0°C ≤ TJ ≤ 85°C, unless otherwise specified.
Parameter
Condition
Line Regulation (VIN)
Min
Typ
Max
Units
VIN = VOUT + 1V to 3.8V, ILOAD = 10mA
0.002
±0.1
%/V
Line Regulation (VBIAS)
VBIAS = 3V to 5.5V (VOUT < 0.8V), ILOAD = 10mA
VBIAS = VOUT + 2.2V to 5.5V (VOUT ≥ 0.8V), ILOAD = 10mA
0.026
±0.3
%/V
Feedback Voltage
(Adjustable Output Voltage)
Room temperature
0.495
0.5
0.505
V
Over temperature range
0.490
0.5
0.510
V
Output Voltage Load Regulation
IL = 10mA to 1.5A
0.1
0.5
%
VIN – VOUT; Dropout Voltage
IL = 750mA
IL = 1.5A
65
100
150
250
mV
mV
VBIAS – VOUT; Dropout Voltage
IL = 1.5A
0.85
2.1
V
VBIAS supply current
VEN = 2V, IL = 100mA
VEN = 2V, IL = 1.5A
1.3
12.5
7.5
75
mA
mA
VBIAS shutdown current
VEN = 0V
0.02
1
µA
VIN shutdown current
VEN = 0V
0.04
1
µA
0.03
1
µA
2.84
3.0
FB bias current
UVLO
VBIAS rising
2.7
Hysteresis
Current Limit
100
V
mV
VOUT = 0V
1.8
3.1
6.0
A
Regulator enable
Regulator shutdown
1.6
0.85
0.75
0.3
V
V
0.012
1
µA
Enable Input
Enable Input Threshold
Enable Pin Input Current
Independent of state
AC Response
Large signal bandwidth
1
MHz
PSRR (BIAS) at 10kHz
VBIAS = 3.3V, IOUT = 750mA
46
dB
PSRR (IN) at 10kHz
VIN = VOUT + 1V, IOUT = 750mA
VIN = VOUT + 0.3V, IOUT = 750mA
60
55
dB
dB
Thermal Shutdown
145
°C
Thermal Shutdown Hysteresis
12
Turn-on Time
85
°C
300
µs
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
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MIC59150
Typical Characteristics
BIAS CURRENT (mA)
16
12
8
VBIAS = 3.3V
4
0
0
VIN = 1.5V
VOUT = 1V
0.2 0.4 0.6 0.8 1 1.2 1.4
OUTPUT CURRENT (A)
December 2008
0.6
Load Regulation
Bias Current
vs. Temperature
30
VBIAS = 3.3V
VIN = 1.5V
VOUT = 1V
0.2
VIN = 1.8V
0.1
VOUT = 1V
3.5
4
4.5
5
BIAS VOLTAGE (V)
4
5.5
=0.75A
OUT
20
VOUT = 0.5V
IOUT=1.5A
15
10
5
0.502
0.3
I
VIN = 1.5V
I
=100mA
OUT
TEMPERATURE (°C)
Ground Current
vs. Bias Voltage
0.4
VBIAS = 3V
25
0
0.2 0.4 0.6 0.8 1 1.2 1.4
OUTPUT CURRENT (A)
120
80
TEMPERATURE (°C)
100
60
40
TEMPERATURE (°C)
0.5
0
3
20
DROPOUT VOLTAGE (V)
0
-40
-40
Bias Current
vs. Output Current
VOUT = 3.45V
IOUT = 1.5A
120
5
VIN = 3.8V
0.2
80
2
3
4
BIAS VOLTAGE (V)
0.4
100
1
0.6
60
VOUT = 2.5V
IOUT = 1.5A
0.8
40
VIN = 3V
0.5
VOUT = 3.45V
1.5
Dropout Voltage vs.
Temperature (VBIAS)
20
1
VBIAS = 5.5V
1.005
1.004
1.003
1.002
1.001
1
0.999
0.998
0.997
0.996
0.995
0
VOUT = 1V
1
1.25
OUTPUT CURRENT (A)
1
-40
1.5
VBIAS = 3.3V
20
BIAS CURRENT (mA)
2
60
FEEDBACK VOLTAGE (V)
10mA
80
0
Dropout Characteristics
(VBIAS)
1.5A
20
100
0.2 0.4 0.6 0.8 1 1.2 1.4
OUTPUT CURRENT (A)
2.5
0
0
120
20
40
120
VOUT = 2.5V
60
1.2
140
40
80
0
0.75
Dropout Voltage vs.
Temperature (VIN)
80
VIN = 3V
100
1000
100
0.4
0.1
1
10
100
FREQUENCY (kHz)
60
0.6
DROPOUT VOLTAGE (mV)
160
0.8
3
IOUT = 0.75A
40
Dropout Voltage
(VBIAS)
0.2
VOUT = 1V
0
0.01
1000
OUTPUT VOLTAGE (V)
DROPOUT VOLTAGE (V)
0.1
1
10
100
FREQUENCY (kHz)
1
0
0
OUTPUT VOLTAGE (V)
10
IOUT = 0.75A
0
0.01
1.2
20
VOUT = 1V
GROUND CURRENT (mA)
10
30 VBIAS = 3.3V
VIN = 1.8V
120
0
20 VIN = 1.8V
40
20
30 V
= 3.3V
BIAS
50
0
40
60
-20
50
140
-20
60
70
160
0
80
Dropout Voltage
(VIN)
-20
90
70
PSRR (dB)
PSRR (dB)
80
Power Supply
Rejection Ratio (VBIAS)
DROPOUT VOLTAGE (mV)
Power Supply
Rejection Ratio (VIN)
Feedback Voltage
vs. Input Voltage
0.501
0.5
0.499
0.498
1.5
VBIAS = 3.3V
VOUT = 1V
1.9 2.3 2.7 3.1 3.5
INPUT VOLTAGE (V)
3.9
M9999-121808-A
Micrel, Inc.
MIC59150
Typical Characteristics (continued)
December 2008
ENABLE THRESHOLD (V)
VIN = 1.5V
TEMPERATURE (°C)
5
120
5.5
VBIAS = 3.3V
80
3.5
4
4.5
5
BIAS VOLTAGE (V)
1.2
100
0.495
3
VOUT = 1V
60
VIN = 1.8V
0.496
40
0.498
0.497
20
0.499
0
0.501
0.5
FeedbackVoltage
vs. Temperature
-20
0.503
0.502
0.51
0.508
0.506
0.504
0.502
0.5
0.498
0.496
0.494
0.492
0.49
-40
0.504
FEEDBACK VOLTAGE (V)
FEEDBACK VOLTAGE (V)
0.505
Feedback Voltage
vs. Bias Voltage
Enable Threshold
vs. Bias Voltage
1
0.8
0.6
0.4
0.2
0
3
VIN = 1.8V
VOUT = 1V
3.5
4
4.5
5
BIAS VOLTAGE (V)
5.5
M9999-121808-A
Micrel, Inc.
MIC59150
Functional Characteristics
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Micrel, Inc.
MIC59150
Functional Diagram
VBIAS
VIN
EN
Enable
Bandgap
ADJ
Ilimit
VOUT
MIC59150 Block Diagram
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M9999-121808-A
Micrel, Inc.
MIC59150
type of ceramic capacitors. Z5U and Y5V dielectric
capacitors change value by as much as 50% and 60%
respectively over their operating temperature ranges. To
use a ceramic chip capacitor with Y5V dielectric, the
value must be much higher than an X7R ceramic or a
tantalum capacitor to ensure the same capacitance
value over the operating temperature range. Tantalum
capacitors have a very stable dielectric (10% over their
operating temperature range) and can also be used with
this device.
Application Information
The MIC59150 is an ultra-high performance, low-dropout
linear regulator designed for high current applications
requiring a fast transient response. The MIC59150
utilizes two input supplies, significantly reducing dropout
voltage, making it perfect for low-voltage, DC-to-DC
conversion. The MIC59150 requires a minimum number
of external components, and as a μCap regulator, the
output is tolerant of virtually any type of capacitor,
including ceramic type and tantalum type capacitors.
The MIC59150 regulator is fully protected from damage
due to fault conditions, offering linear current limiting and
thermal shutdown.
Input Capacitor
An input capacitor of 1μF or greater is recommended
when the device is more than 4 inches away from the
bulk supply capacitance, or when the supply is a battery.
Small, surface-mount, ceramic chip capacitors can be
used for the bypassing. The capacitor should be placed
within 1" of the device for optimal performance. Larger
values will help to improve ripple rejection by bypassing
the input to the regulator, further improving the integrity
of the output voltage.
Bias Supply Voltage
VBIAS, requiring relatively light current, provides power to
the control portion of the MIC59150. VBIAS requires
approximately 12mA for a 1.5A load current. Dropout
conditions require higher currents. Most of the biasing
current is used to supply the base current to the pass
transistor. This allows the pass element to be driven into
saturation, reducing the dropout to 100mV at a 1.5A load
current. Bypassing on the bias pin is recommended to
improve performance of the regulator during line and
load transients. Small ceramic capacitors from VBIAS to
ground help reduce high frequency noise from being
injected into the control circuitry from the bias rail and
are good design practice. Good bypass techniques
typically include one larger capacitor such as 1μF
ceramic and smaller valued capacitors such as 0.01μF
or 0.001μF in parallel with that larger capacitor to
decouple the bias supply. The VBIAS input voltage must
be 2.1V above the output voltage with a minimum VBIAS
input voltage of 3V.
Thermal Design
Linear regulators are simple to use. The most
complicated design parameters to consider are thermal
characteristics. Thermal design requires the following
application-specific parameters:
Maximum ambient temperature (TA)
•
Output current (IOUT)
•
Output voltage (VOUT)
•
Input voltage (VIN)
• Ground current (IGND)
First, calculate the power dissipation (PD) of the
regulator from these numbers and the device
parameters from this datasheet.
Input Supply Voltage
VIN provides the high current to the collector of the pass
transistor. The minimum input voltage is 1.0V, allowing
conversion from low voltage supplies.
PD = VIN × I IN + VBIAS × I BIAS − VOUT × I OUT
The input current will be less than the output current at
high output currents as the load increases. The bias
current is a sum of base drive and ground current.
Ground current is constant over load current. Then the
heat sink thermal resistance is determined with this
formula:
Output Capacitor
The MIC59150 requires a minimum of output
capacitance to maintain stability. However, proper
capacitor selection is important to ensure desired
transient response. The MIC59150 is specifically
designed to be stable with virtually any capacitance
value and ESR. A 1μF ceramic chip capacitor should
satisfy most applications. Output capacitance can be
increased without bound. See the “Functional
Characteristics” subsection for examples of load
transient response.
X7R dielectric ceramic capacitors are recommended
because of their temperature performance. X7R-type
capacitors change capacitance by 15% over their
operating temperature range and are the most stable
December 2008
•
⎛ TJ ( MAX ) − T A ⎞
⎟ − (θ JC + θ CS )
⎟
PD
⎝
⎠
θ SA = ⎜⎜
The heat sink may be significantly reduced in
applications where the maximum input voltage is known
and large compared with the dropout voltage. Use a
series input resistor to drop excessive voltage and
distribute the heat between this resistor and the
regulator. The low-dropout properties of the MIC59150
allow significant reductions in regulator power dissipation
and the associated heat sink without compromising
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M9999-121808-A
Micrel, Inc.
MIC59150
values can cause instability. The resistor values are
calculated by:
performance. When this technique is employed, a
capacitor of at least 1μF is needed directly between the
input and regulator ground. Refer to “Application Note 9”
(http://www.micrel.com/_PDF/App-Notes/an-9.pdf)
for
further details and examples on thermal design and heat
sink specification.
⎛V
⎞
R1 = R 2 × ⎜ OUT − 1⎟
⎜ 0. 5
⎟
⎝
⎠
where VOUT is the desired output voltage.
Minimum Load Current
The MIC59150, unlike most other high current
regulators, does not require a minimum load to maintain
output voltage regulation.
Enable
An active high enable input (EN) allows on-off control of
the regulator. Current drain reduces to “zero” when the
device is shutdown, with only microamperes of leakage
current. The EN input has CMOS compatible thresholds
for simple logic interfacing. EN may be directly tied to
VBIAS and pulled up to the maximum supply voltage.
Adjustable Regulator Design
The MIC59150 adjustable version allows programming
the output voltage anywhere between 0.5Vand 3.5V.
Two resistors are used. The resistor value between VOUT
and the adjust pin should not exceed 10kΩ. Larger
December 2008
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M9999-121808-A
Micrel, Inc.
MIC59150
U1
MIC59150YME
J1
VIN
1V to 3.8V
C1
1uF/6.3V
3
6
VIN
VIN
VOUT
VOUT
C2
1uF/6.3V
R1
1K
C4
OPEN
J2
GND
2
VBIAS
1
EN
ADJ
C3
1uF/6.3V
J5
GND
7
1
J3
VBIAS
3V to 5.5V
J4
VOUT
4
5
GND
B
C
D
1
JP2
8
A
7
R5
383
6
R4
499
5
R3
698
4
R2
1K
3
8
2
2
3
JP1
JP2 = Voltages Selector
A VOUT = 1.0V
B VOUT = 1.2V
C VOUT = 1.5V
D VOUT = 1.8V
Bill of Materials
Item
Part Number
C1,C2
C1608X5R0J105K
C3
GRM188R60J105KA01D
0603D105KAT2A
Manufacturer
TDK
(1)
Description
Qty.
1uF Ceramic Capacitor X5R 0603 6.3V
3
Open
1
Murata(2)
AVX(3)
C4
(4)
R1,R2
CRCW06031K00FKXX
Vishay
1kΩ 1% 0603 Resistor
2
R3
CRCW0603698RFKXX
Vishay(4)
698Ω 1% 0603 Resistor
1
CRCW0603499RFKXX
(4)
499Ω 1% 0603 Resistor
1
R4
R5
CRCW0603383RFKXX
U1
MIC59150YME
Vishay
(4)
Vishay
Micrel, Inc.(5)
383Ω 1% 0603 Resistor
1
Ultra High Speed 1.5A LDO
1
Notes:
1. TDK: www.tdk.com
2. Murata Tel: www.murata.com
3. AVX Tel: www.avx.com
4. Vishay Tel: www.vishay.com
5. Micrel, Inc.: www.micrel.com
December 2008
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M9999-121808-A
Micrel, Inc.
MIC59150
PCB Layout Recommendations
Top Layer
Bottom Layer
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Micrel, Inc.
MIC59150
Package Information
8-Pin EPAD SOIC (ME)
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
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
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.
© 2008 Micrel, Incorporated.
December 2008
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