MIC69151/153
Single Supply VIN, Low VIN, Low VOUT,
1.5A LDO
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
December 2008
M9999-121908-C
General Description
The MIC69151/153 is the 1.5A output current member of
the MIC69xxx family of high current, low voltage
regulators, which support currents of 1A, 1.5A, 3A, and 5A.
The MIC69151/153 operates from a single low voltage
supply, yet offers high precision and ultra-low dropout of
500mV under worst case conditions.
The MIC69151/153 operates from an input voltage of
1.65V to 5.5V. It is designed to drive digital circuits
requiring low voltage at high currents (i.e. PLDs, DSP,
microcontroller, etc.). These regulators are available in
adjustable and fixed output voltages including 1.8V. The
adjustable version can support output voltages down to
0.5V.
The µCap design of the MIC69151/153 is optimized for
stability with low value low-ESR ceramic output capacitors.
Features of the MIC69151/153 include thermal shutdown
and current limit protection. Logic enable and error flag
pins are also available.
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.
Features
∑ Single input voltage range: VIN: 1.65V to 5.5V
∑ Maximum dropout (VIN – VOUT) of 500mV
over temperature
∑ Adjustable output voltage down to 0.5V
∑ Stable with 10µF ceramic output capacitor
∑ Excellent line and load regulation specifications
∑ Logic controlled shutdown
∑ Thermal shutdown and current limit protection
∑ 10-Pin 3mm x 3mm MLF® package
∑ EPAD SOIC-8 package
∑ Available –40°C to +125°C junction temperature
Applications
∑ Point-of-load applications
∑ Industrial power
∑ Sensitive RF applications
___________________________________________________________________________________________________________
Typical Application
Fixed 1.8V Regulator w/Flag Error
Adjustable Regulator
Micrel, Inc.
MIC69151/153
2
M9999-121908-C
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®
Pb-Free
MIC69151-1.8YME
1.8V
–40° to +125°C
8-Pin EPAD SOIC
Pb Free
MIC69153YME
Adj.
–40° to +125°C
8-Pin EPAD SOIC
Pb Free
MIC69153YML
Adj.
–40° to +125°C
10-Pin 3x3 MLF®
Pb-Free
Pin Configuration
NC EN5
1FLG
NC
GND
NC
10 ADJ/SNS
VOUT
NC
VIN
9
8
7
2
3
4
6
1GND
EN
VIN
VIN
8 FLG
SNS/ADJ
VOUT
VOUT
7
6
5
2
3
4
10-Pin 3mm x 3mm MLF® (ML)
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
Ground (exposed pad is recommended to connect to ground on MLF®).
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.
9
5, 6
VOUT
Regulator Output.
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.
Micrel, Inc.
MIC69151/153
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M9999-121908-C
Absolute Maximum Ratings(1)
Supply Input Voltage (VIN)...................................................6V
Logic Input Voltage (VEN, VLQ)...................................0V to VIN
Power Dissipation (PD).............................Internally Limited(3)
Flag ......................................................................................6V
Storage Temperature (TS)...........................–65°C to +125°C
ESD(4) .................................................................................2kV
Operating Ratings(2)
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® (qJA)......................................................60°C/W
EPAD SOIC-8 (qJA)..............................................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
Conditions
Min
Typ
Max
Units
Output Voltage Accuracy (Fixed)
Over temperature range
–2
+2
%
Output Voltage Accuracy (Adj)
0.49
0.5
0.51
V
Feedback Pin Current
0.25
1
µA
Output Voltage Line Regulation
(Note 5)
VIN = VOUT +1.0V to 5.5V
For VOUT ≥ 0.65V, VIN = 1.65 to 5.5V
±0.2
±0.3
%/V
Output Voltage Load Regulation
IL = 10mA to 1.5A
±0.2
%
VIN – VO; Dropout Voltage
(Note 6)
IL = 1.0A
IL = 1.5A
185
250
300
500
mV
mV
Ground Pin Current
IL = 10mA
IL = 0.5A
IL = 1.5A
1.6
7.5
20
20
35
mA
mA
mA
Ground Pin Current in Shutdown
VEN = 0V
1
µA
Current Limit
VOUT = 0V
1.7
2.6
A
Start-up Time
VEN = VIN
10
150
µs
Thermal Shutdown
165
°C
Enable Input
Enable Input Threshold
Regulator enable
Regulator shutdown
0.8
0.6
0.2
V
V
Enable Pin Input Current
VIL ≤ 0.2V (Regulator shutdown)
VIH ≥ 0.8V (Regulator enable)
0.005
7
µA
µA
Flag Output
IFLG(LEAK)
Flag Output Leakage Current (Flag Off)
0.05
µA
VFLG(LO)
Output Logic-Low Voltage (undervoltage condition),
IL = 5mA
150
mV
VFLG
Threshold, % of VOUT below nominal (falling)
7.5
10
14
%
Hysteresis
2
%
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) / qJA. 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.
Micrel, Inc.
MIC69151/153
4
M9999-121908-C
Typical Characteristics
0
10
20
30
40
50
60
70
Power Supply
Rejection Ratio
1K 10K
FREQUENCY (Hz)
VIN = 3.3V
VOUT = 1.8V
IOUT = 0.5A
0
50
100
150
200
250
300
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
OUTPUT CURRENT (A)
0
Dropout Voltage
vs. Output Current
VOUT = 1.8V
COUT = 10µF
0
50
100
150
200
250
300
350
400
Dropout Voltage
vs. Temperature
20 40 60 80
TEMPERATURE (°C)
VIN = 3.3V
VOUT = 1.8V
IOUT=1.5A
IOUT=750mA
0
2
4
6
8
10
12
14
16
18
Ground Current
vs. Output Current
800 1200
OUTPUT CURRENT (mA)
VIN = 3V
VOUT = 1.8V
COUT = 10µF
0
2
4
6
8
10
12
14
16
Ground Current
vs. Temperature
20 40 60 80
TEMPERATURE (°C)
VIN = VOUT +1
VOUT = 1.8V
COUT = 10µF
1A
0.5A
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0 0.5 1.0 1.5 2.0 2.5 3.0
INPUT VOLTAGE (V)
Output Voltage
vs. Input Voltage
VOUT = 1.8V
COUT = 10µF
1A
750mA
1.70
1.72
1.74
1.76
1.78
1.80
1.82
1.84
1.86
1.88
1.90
Output Voltage
vs. Temperature
20 40 60 80
TEMPERATURE (°C)
VIN = 3.3V
VOUT = 1.8V
IOUT = 10mA
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
Current Limit
vs. Temperature
20 40 60 80
TEMPERATURE (°C)
VIN = 3.3V
VOUT = 1.8V
1.786
1.788
1.790
1.792
1.794
1.796
1.798
1.800
1.802
0 0.25 0.5 0.75 1.0 1.25 1.5
OUTPUT CURRENT (A)
Load Regulation
VIN = 3V
VOUT = 1.8V
COUT = 10µF
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Enable Threshold
vs. Temperature
20 40 60 80
TEMPERATURE (°C)
VIN = 2.8V
VOUT = 1.8V
COUT = 10µF
IOUT = 100mA
ON
OFF
Micrel, Inc.
MIC69151/153
5
M9999-121908-C
Functional Characteristics
Micrel, Inc.
MIC69151/153
6
M9999-121908-C
Functional Diagram
ENABLE
IN
EN
OUT
ADJ
V
REF
GND
V
REF
50mV FLG
Micrel, Inc.
MIC69151/153
7
M9999-121908-C
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.
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.
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.
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.
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.
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:
˜
˜
¯
ˆ
Á
Á
Ë
Ê+*= 1
R
R
0.5V 2
1
OUT
Where VOUT is the desired output voltage.
Enable
The fixed output voltage versions of the MIC69151
feature an active high enable input (EN) that allows on-
off 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) / qJA. 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.
Micrel, Inc.
MIC69151/153
8
M9999-121908-C
Package Information
10-Pin 3mm x 3mm MLF® (ML)
8-Pin EPAD SOIC (ME)
Micrel, Inc.
MIC69151/153
9
M9999-121908-C
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
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© 2008 Micrel, Incorporated.