Micrel MIC69151 Single supply vin, low vin, low vout, 1.5a ldo Datasheet

MIC69151/153
Single Supply VIN, Low VIN, Low VOUT,
1.5A LDO
General Description
Features
The MIC69151/153 is the 1.5A output current member of
• Single input voltage range: VIN: 1.65V to 5.5V
the MIC69xxx family of high current, low voltage
• Maximum dropout (VIN – VOUT) of 500mV
regulators, which support currents of 1A, 1.5A, 3A, and 5A.
over temperature
The MIC69151/153 operates from a single low voltage
• Adjustable output voltage down to 0.5V
supply, yet offers high precision and ultra-low dropout of
• Stable with 10µF ceramic output capacitor
500mV under worst case conditions.
• Excellent line and load regulation specifications
The MIC69151/153 operates from an input voltage of
• Logic controlled shutdown
1.65V to 5.5V. It is designed to drive digital circuits
requiring low voltage at high currents (i.e. PLDs, DSP,
• Thermal shutdown and current limit protection
®
microcontroller, etc.). These regulators are available in
• 10-Pin 3mm x 3mm MLF package
adjustable and fixed output voltages including 1.8V. The
• EPAD SOIC-8 package
adjustable version can support output voltages down to
• Available –40°C to +125°C junction temperature
0.5V.
The µCap design of the MIC69151/153 is optimized for
stability with low value low-ESR ceramic output capacitors.
Applications
Features of the MIC69151/153 include thermal shutdown
• Point-of-load applications
and current limit protection. Logic enable and error flag
• Industrial power
pins are also available.
• Sensitive RF applications
The MIC69151/153 is offered in a tiny 10-pin 3mm x 3mm
®
MLF package and an EPAD SOIC-8 package. Both
packages have an operating temperature range of
–40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
Fixed 1.8V Regulator w/Flag Error
Adjustable Regulator
Super ßeta PNP is a registered trademark of Micrel, 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
July 2010
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Micrel, Inc.
MIC69151/153
Ordering Information
Part Number
Nominal
Output Voltage
Junction
Temperature Range
Package
Lead Finish
MIC69151-1.8YML
1.8V
–40° to +125°C
10-Pin 3x3 MLF
MIC69151-1.8YME
1.8V
–40° to +125°C
8-Pin EPAD SOIC
MIC69153YME
Adj.
–40° to +125°C
8-Pin EPAD SOIC
MIC69153YML
Adj.
–40° to +125°C
10-Pin 3x3 MLF
®
®
Pb-Free
Pb Free
Pb Free
Pb-Free
Pin Configuration
FLG
1
10 ADJ/SNS
NC
2
9
VOUT
GND
3
8
NC
NC
4
7
VIN
NC
5
6
EN
®
10-Pin 3mm x 3mm MLF (ML)
GND
1
8 FLG
EN
2
7 SNS/ADJ
VIN
3
6 VOUT
VIN
4
5 VOUT
8-Pin EPAD SOIC (ME)
Pin Description
Pin Number
MLF-10
Pin Number
EPAD SOIC-8
Pin Name
Pin Function
1
8
FLG
Error Flag (Output): Open collector output. Active low indicates an output fault
condition.
2, 4, 5, 8
–
NC
Not internally connected.
3 (EP)
1
GND
6
2
EN
Enable (Input): CMOS compatible input. Logic high = enable,
logic low = shutdown. Do not leave pin floating.
7
3, 4
VIN
Input voltage which supplies current to the output power device.
®
Ground (exposed pad is recommended to connect to ground on MLF ).
9
5, 6
VOUT
10 (Adj)
7 (Adj)
ADJ
Adjustable regulator feedback input. Connect to resistor voltage divider.
10 (Fixed)
7 (Fixed)
SNS
Sense pin, connect to output for improved voltage regulation.
July 2010
Regulator Output.
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MIC69151/153
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Input Voltage (VIN) ................................................6V
Logic Input Voltage (VEN, VLQ)................................ 0V to VIN
(3)
Power Dissipation (PD) ........................... Internally Limited
Flag ..................................................................................6V
Storage Temperature (TS)......................... –65°C to +125°C
(4)
ESD ............................................................................. 2kV
Supply Voltage (VIN) ....................................... 1.65V to 5.5V
Enable Input Voltage (VEN)..................................... 0V to VIN
Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C
Package Thermal Resistance
®
3x3 MLF (θJA) ...................................................60°C/W
EPAD SOIC-8 (θJA) ............................................41°C/W
Electrical Characteristics(4)
TA = 25°C with VIN = VOUT + 1V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT 4.7µF ceramic, unless otherwise noted.
Parameter
Output Voltage Accuracy (Fixed)
Adjustable Feedback Voltage
(Adj)
Feedback Pin Current
Output Voltage Line Regulation
(Note 5)
Output Voltage Load Regulation
VIN – VO; Dropout Voltage
(Note 6)
Ground Pin Current
Ground Pin Current in Shutdown
Current Limit
Start-up Time
Thermal Shutdown
Enable Input
Enable Input Threshold
Enable Pin Input Current
Conditions
Over temperature range
Min
–2
0.49
VIN = VOUT +1.0V to 5.5V
For VOUT ≥ 0.65V, VIN = 1.65 to 5.5V
IL = 10mA to 1.5A
IL = 1.0A
IL = 1.5A
IL = 10mA
IL = 0.5A
IL = 1.5A
VEN = 0V
VOUT = 0V
VEN = VIN
Regulator enable
Regulator shutdown
VIL ≤ 0.2V (Regulator shutdown)
VIH ≥ 0.8V (Regulator enable)
1.7
0.8
Typ
0.5
Max
+2
0.51
Units
%
V
0.25
±0.2
1
±0.3
µA
%/V
±0.2
185
250
1.6
7.5
20
1
2.6
10
165
300
500
20
35
150
0.6
%
mV
mV
mA
mA
mA
µA
A
µs
°C
0.005
7
V
V
µA
µA
0.2
Flag Output
IFLG(LEAK)
Flag Output Leakage Current (Flag Off)
0.05
µA
VFLG(LO)
Output Logic-Low Voltage (undervoltage condition),
IL = 5mA
Threshold, % of VOUT below nominal (falling)
Hysteresis
150
mV
VFLG
7.5
10
2
14
%
%
Notes:
1. Exceeding the 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 of any TA (ambient temperature) is (PD(max) = TJ(max) – TA) / θJA. Exceeding the maximum allowable power
dissipation will result in excessive die temperature and the regulator will go into thermal shutdown.
4. Specification for packaged product only.
5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage.
6. 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.
For outputs below 1.65V, dropout voltage is considered the input-to-output voltage differential with the minimum input voltage of 1.65V. Minimum
input operating voltage is 1.65V.
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MIC69151/153
Typical Characteristics
Power Supply
Rejection Ratio
70
60
300
300
200
40
200
150
100
20
VIN = 3.3V
10 VOUT = 1.8V
IOUT = 0.5A
0
1K 10K
FREQUENCY (Hz)
Ground Current
vs. Output Current
18
50
VOUT = 1.8V
COUT = 10µF
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
OUTPUT CURRENT (A)
16
14
14
12
Ground Current
vs. Temperature
1A
10
10
8
8
6
6
4
VIN = 3V
VOUT = 1.8V
COUT = 10µF
800
1200
OUTPUT CURRENT (mA)
2
0
Output Voltage
vs. Temperature
1.90
1.88
1.86
0.5A
4 V =V
IN
OUT +1
2 VOUT = 1.8V
COUT = 10µF
0
20 40 60 80
TEMPERATURE (°C)
2.8
2.7
2.6
1.84
1.82
1.80
1.78
2.5
2.4
2.3
2.2
1.76
1.74
1.72
2.1
2.0
1.9
VIN = 3.3V
VOUT = 1.8V
IOUT = 10mA
1.70
20 40 60 80
TEMPERATURE (°C)
IOUT=750mA
100
16
12
IOUT=1.5A
250
150
30
1.8
Current Limit
vs. Temperature
VIN = 3.3V
VOUT = 1.8V
50
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
20 40 60 80
TEMPERATURE (°C)
Output Voltage
vs. Input Voltage
750mA
1A
VOUT = 1.8V
COUT = 10µF
0.5 1.0 1.5 2.0 2.5
INPUT VOLTAGE (V)
3.0
Load Regulation
1.802
1.800
1.798
1.796
1.794
1.792
1.790
VIN = 3.3V
VOUT = 1.8V
20 40 60 80
TEMPERATURE (°C)
VIN = 3V
1.788 VOUT = 1.8V
COUT = 10µF
1.786
0 0.25 0.5 0.75 1.0 1.25 1.5
OUTPUT CURRENT (A)
Enable Threshold
vs. Temperature
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0
400
Dropout Voltage
vs. Temperature
350
250
50
0.3
0.2
0.1
Dropout Voltage
vs. Output Current
ON
VIN = 2.8V
VOUT = 1.8V
COUT = 10µF
IOUT = 100mA
July 2010
OFF
20 40 60 80
TEMPERATURE (°C)
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Micrel, Inc.
MIC69151/153
Functional Characteristics
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MIC69151/153
Functional Diagram
IN
EN
OUT
ENABLE
VREF
ADJ
50mV
FLG
VREF
GND
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MIC69151/153
Minimum Load Current
The MIC69151/153 regulator is specified between finite
loads. If the output current is too small, leakage currents
dominate and the output voltage rises. A 10mA minimum
load current is necessary for proper operation.
Application Information
The MIC69151/153 is an ultra-high performance low
dropout linear regulator designed for high current
applications requiring a fast transient response. It utilizes
a single input supply, perfect for low-voltage DC-to-DC
conversion. The MIC69151/153 requires a minimum
number of external components.
The MIC69151/153 regulator is fully protected from
damage due to fault conditions offering constant current
limiting and thermal shutdown.
Adjustable Regulator Design
The MIC69153 adjustable version allows programming
the output voltage anywhere between 0.5V and 5.5V
with two resistors. The resistor value between VOUT and
the adjust pin should not exceed 10kΩ. Larger values
can cause instability. The resistor values are calculated
by:
Input Supply Voltage
VIN provides high current to the collector of the pass
transistor. The minimum input voltage is 1.65V allowing
conversion from low voltage supplies.
⎛R
⎞
VOUT = 0.5 ∗ ⎜⎜ 1 + 1⎟⎟
⎝ R2
⎠
Where VOUT is the desired output voltage.
Output Capacitor
The MIC69151/153 requires a minimum of output
capacitance to maintain stability. However, proper
capacitor selection is important to ensure desired
transient response. The MIC69151/153 is specifically
designed to be stable with low ESR ceramic chip
capacitors. A 10µF ceramic chip capacitor should satisfy
most applications. Output capacitor can be increased
without bound. See typical characteristics for examples
of load transient response.
X7R dielectric ceramic capacitors are recommended
because of their temperature performance. X7R-type
capacitors change capacitance by only 15% over their
operating temperature range and are the most stable
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.
Enable
The fixed output voltage versions of the MIC69151
feature an active high enable input (EN) that allows onoff control of the regulator. Current drain reduces to near
“zero” when the device is shutdown, with only
microamperes of leakage current. EN may be directly
tied to VIN and pulled up to the maximum supply voltage.
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 of the regulator
from these numbers and the device parameters from this
data sheet.
PD = (VIN – VOUT) IOUT + VIN IGND
where the ground current is approximated by using
numbers from the “Electrical Characteristics” or “Typical
Characteristics” sections. The maximum allowable
power dissipation of any TA (ambient temperature) is
PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum
allowable power dissipation will result in excessive die
temperature and the regulator will go into thermal
shutdown.
Refer to “Application Note 9” for further details and
examples on thermal design and heat sink applications.
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 inch 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.
July 2010
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MIC69151/153
Package Information
®
10-Pin 3mm x 3mm MLF (ML)
8-Pin EPAD SOIC (ME)
July 2010
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Micrel, Inc.
MIC69151/153
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.
July 2010
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