MICREL MIC69101

MIC69101/103
Single Supply VIN, LOW VIN, LOW VOUT,
1A LDO
General Description
Features
The MIC69101/103 is the 1A output current member of the
∑ Single input voltage range: VIN: 1.65V to 5.5V
MIC69xxx family of high current, low voltage regulators,
∑ Maximum dropout (VIN – VOUT) of 500mV
which support currents of 1A, 1.5A, 3A, and 5A. The
over temperature
MIC69101/103 operates from a single low voltage supply,
∑ Adjustable output voltage down to 0.5V
yet offers high precision and ultra-low dropout of 500mV
∑ Stable with 4.7µF ceramic output capacitor
under worst case conditions.
∑ Excellent line and load regulation specifications
The MIC69101/103 operates from an input voltage of
∑ Logic controlled shutdown
1.65V to 5.5V. It is designed to drive digital circuits
∑ Thermal shutdown and current limit protection
requiring low voltage at high currents (i.e. PLDs, DSP,
®
∑ 10-Pin 3mm x 3mm MLF package
microcontroller, etc.). These regulators are available in
adjustable and fixed output voltages including 1.8V. The
∑ Available –40°C to +125°C junction temperature
adjustable version can support output voltages down to
0.5V.
Applications
The µCap design of the MIC69101/103 is optimized for
∑ Point-of-load applications
stability with low value low-ESR ceramic output capacitors.
∑ Industrial power
Features of the MIC69101/103 include thermal shutdown
and current limit protection. Logic enable and error flag
∑ Sensitive RF applications
pins are also available.
The MIC69101/103 is offered in a tiny 10-pin 3mm x 3mm
®
MLF package and has an operating temperature range of
–40°C to +125°C.
Datasheets 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
December 2008
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Micrel, Inc.
MIC69101/103
Ordering Information
Part Number
Nominal
Output Voltage
Junction
Temperature Range
Package
MIC69101-1.8YML
1.8V
–40° to +125°C
10-Pin 3x3 MLF
MIC69103YML
Adj.
–40° to +125°C
Lead Finish
®
Pb-Free
®
Pb-Free
10-Pin 3x3 MLF
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)
Pin Description
Pin Number
Pin Name
1
FLG
Error Flag (Output): Open collector output. Active low indicates an output fault
condition.
2, 4, 5, 8
NC
Not internally connected.
3 (EP)
GND
6
EN
Enable (Input): CMOS compatible input. Logic high = enable,
logic low = shutdown. Do not leave pin floating.
7
VIN
Input voltage which supplies current to the output power device.
9
VOUT
10 (Adj)
ADJ
Adjustable regulator feedback input. Connect to resistor voltage divider.
10 (Fixed)
SNS
Sense pin, connect to output for improved voltage regulation.
December 2008
Pin Function
®
Ground (exposed pad is recommended to connect to ground on MLF ).
Regulator Output.
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Micrel, Inc.
MIC69101/103
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 (T S)........................... –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
®
MLF (qJA)............................................................. 60°C/W
Electrical Characteristics(4)
TA = 25°C with VIN = VOUT + 0.5V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT 4.7µF ceramic, unless otherwise noted.
Parameter
Output Voltage Accuracy (Fixed)
Output Voltage Accuracy (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 1A
IL = 0.5A
IL = 1.0A
IL = 10mA
IL = 0.5A
IL = 1.0A
VEN = 0V
VOUT = 0V
VEN = VIN
Regulator enable
Regulator shutdown
VIL ≤ 0.2V (Regulator shutdown)
VIH ≥ 0.8V (Regulator enable)
1.2
0.8
Typ
0.5
0.21
±0.1
±0.25
150
215
1.1
4.7
11
1
1.95
10
165
Max
+2
0.51
1
±0.3
300
500
20
150
0.6
0.2
0.005
7
Units
%
V
µA
%/V
%
mV
mV
mA
mA
mA
µA
A
µs
°C
V
V
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
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) / 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.
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MIC69101/103
Typical Characteristics
70
Power Supply
Rejection Ratio
60
50
40
30
20
VIN = 3.3V
10 VOUT = 1.8V
IOUT = 0.5A
0
1K 10K
FREQUENCY (Hz)
2.00
Output Voltage
vs. Temperature
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
20
18
16
14
12
VIN = VOUT + 1V
VOUT = 1.8V
COUT = 10µF
IOUT = 10mA
20 40 60 80
TEMPERATURE (°C)
Ground Current
vs. Temperature
1A
VIN = VOUT + 1V
VOUT = 1.8V
COUT = 10µF
10
8
6
4
2
0
4.0
400
20 40 60 80
TEMPERATURE (°C)
400
350
350
300
300
250
250
200
200
150
150
100
100
VOUT = 1.8V
COUT = 10µF
50
0
100
2.0
300
500
700
900
OUTPUT CURRENT (mA)
Outpout Voltage
vs. Input Voltage
50
0
10
1.8
9
1.6
1.4
1.2
8
7
6
0.5A
1A
1.0
0.8
5
4
0.6
0.4
3
2
0.2
0
0
1.0
0.9
VOUT = 1.8V
COUT = 10µF
0.4 0.8 1.2 1.6 2.0 2.4 2.8
INPUT VOLTAGE (V)
Enable Threshold
vs. Temperature
1
0
Dropout Voltage
vs. Temperature
IOUT=1A
IOUT=0.5A
VOUT = 1.8V
COUT = 10µF
20 40 60 80
TEMPERATURE (°C)
Ground Current
vs. Output Current
VIN = 2.8V
VOUT = 1.8V
COUT = 10µF
0.5
0.7
OUTPUT CURRENT (A)
Load Regulation
1.900
1.875
0.8
0.7
0.6
0.5
0.4
0.5A
Dropout Voltage
vs. Output Current
1.850
ON
1.825
1.800
OFF
1.775
0.3 VIN = 2.8V
0.2 VOUT = 1.8V
= 10µF
C
0.1 OUT
IOUT = 100mA
0
20 40 60 80
TEMPERATURE (°C)
1.750
1.725
1.700
VIN = 2.8V
VOUT = 1.8V
COUT = 10µF
0.4
0.6
OUTPUT CURRENT (A)
Current Limit
vs. Temperature
3.5
3.0
2.5
2.0
1.5
1.0
VIN = 2.8V
VOUT = 1.8V
COUT = 10µF
0.5
0
20 40 60 80
TEMPERATURE (°C)
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MIC69101/103
Functional Characteristics
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MIC69101/103
Functional Diagram
IN
EN
OUT
ENABLE
VREF
ADJ
50mV
FLG
VREF
GND
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MIC69101/103
Minimum Load Current
The MIC69101/103 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 MIC69101/103 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 MIC69101/103 requires a minimum
number of external components.
The MIC69101/103 regulator is fully protected from
damage due to fault conditions offering constant current
limiting and thermal shutdown.
Adjustable Regulator Design
The MIC69101/103 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 a high current to the collector of the pass
transistor. The minimum input voltage is 1.65V allowing
conversion from low voltage supplies.
ÊR
ˆ
VOUT = 0.5 * ÁÁ 1 + 1˜˜
Ë R2
¯
Where VOUT is the desired output voltage.
Output Capacitor
The MIC69101/103 requires a minimum of output
capacitance to maintain stability. However, proper
capacitor selection is important to ensure desired
transient response. The MIC69101/103 is specifically
designed to be stable with low ESR ceramic chip
capacitors. A 4.7µF 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 MIC69101/103
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) / 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.
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.
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MIC69101/103
Package Information
®
10-Pin 3mm x 3mm MLF (ML)
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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