MIC61300
Low Input Voltage, Single-Supply
High-Current LDO
General Description
The Micrel MIC61300 is a 3A output, low input voltage,
single-supply regulator. This regulator operates over a
single input voltage range of 1.1V to 3.6V and offers an
ultra-low dropout less than 350mV over the entire
operating temperature range.
The MIC61300 is designed to drive digital circuits requiring
low voltages at high currents such as DSPs, FPGAs,
microcontrollers, etc. The regulator is available as a 1.0V
fixed-output voltage option or as an adjustable-output
voltage option.
The MIC61300 is stable with a 47µF, low-ESR ceramic
output capacitor, and includes protection features such as
thermal shutdown, current limiting and logic enable.
The MIC61300 is offered in two different packages: a low-
profile, leadless 10-pin 3mm x 3mm MLF
®
and a 10-pin
ePad MSOP. The MIC61300 has an operating junction
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 V
IN
rail: 1.1V to 3.6V
•
Output voltage accuracy: ±2.5% over temperature
•
Typical dropout of 150mV at room temperature
– Maximum dropout of 350mV at full load over
temperature
•
Output voltage adjustable down to 0.5V
•
Soft-start control via external capacitor
•
Excellent line and load regulation
•
Logic controlled shutdown
•
Thermal-shutdown and current-limit protection
•
10-pin 3mm
×
3mm MLF
®
package
•
10-pin ePad MSOP package
•
Junction temperature range from
−40°C
to +125°C
Applications
•
Point-of-load applications
•
ASIC / Microprocessor power supply
•
FPGA power supply
•
Telecom / Networking cards
•
Wireless infrastructure
____________________________________________________________________________________________________________
Typical Application
Dropout Voltage
vs. Output Current
200
DROPOUT VOLTAGE (mV)
V
IN
= 1.5V
V
FB
= 0V
T
A
= 25ºC
150
100
50
0
0.0
1.0
2.0
3.0
OUTPUT CURRENT (A)
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
September 2010
M9999-092910-A
Micrel, Inc.
MIC61300
Ordering Information
Part Number
MIC61300YMME
MIC61300-10YMME
MIC61300YML
MIC61300-10YML
Top Mark
61300
Z10J
ZJ30
10ZJ
Voltage
Adjustable
1.0V
Adjustable
1.0V
Temperature Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
ePad MSOP-10L
ePad MSOP-10L
3mmx3mm MLF -10L
3mmx3mm MLF -10L
®
®
Lead Finish
Pb Free
Pb Free
Pb Free
Pb Free
Pin Configuration
10-Pin ePad MSOP (MME)
10-Pin 3mm x 3mm MLF
®
(ML)
Pin Description
Pin Number
1, 2
3
4
5, 6
7
Pin Name
IN
GND
EN
NC
CP
FB
8
SENSE
9, 10
EP
OUT
GND
Pin Function
Input Voltage.
Ground: Input and output return pin.
Enable: Active-high control input that allows turn-on/-off of the LDO.
No external function. Tie to ground.
Internal Charge Pump Circuit Output: Connect a 0.1µF to 1µF capacitor from CP pin-to-GND to
control the ramp rate of the output.
Adjustable Regulator Feedback Input: Connect to the resistor voltage divider network that is
placed from OUT pin to GND pin in order to set the output voltage.
Fixed-Output Voltage Sense Input: Apply a Kelvin connection from this pin of the fixed output at
the point-of-load to sense the output voltage level.
Regulator Output: The output voltage is set by the resistor divider connected from V
OUT
to GND
(with the divided connection tied to FB). A 47µF ceramic capacitor with low ESR is required to
maintain stability. See
Applications Information.
Connect to GND.
September 2010
2
M9999-092910-A
Micrel, Inc.
MIC61300
Absolute Maximum Ratings
(1, 2)
V
IN
to GND......................................................
−0.3V
to 4.5V
V
CP
to GND.....................................................
−0.3V
to 5.5V
V
OUT
to GND ......................................................
−0.3V
to V
IN
V
SENSE
to GND ...................................................
−0.3V
to V
IN
V
EN
to GND.....................................................
−0.3V
to 4.5V
V
FB
to GND ........................................................
−0.3V
to V
IN
Junction Temperature (T
J
) ......................................... 150°C
Lead Temperature (soldering, 10 sec.)...................... 260°C
Storage Temperature (T
S
).........................−65°C to +150°C
Operating Ratings
(3)
Supply Voltage (V
IN
)......................................... 1.1V to 3.6V
Enable Voltage (V
EN
)......................................
−0.3V
to 3.6V
Output Voltage Range (V
OUT
)........................... 0.5V to 3.0V
Ambient Temperature Range (T
A
) .............. –40°C to +85°C
Junction Temperature (T
J
) ........................ –40°C to +125°C
Maximum Power Dissipation (P
D
) .............................
Note 4
Package Thermal Resistance
3mm
×
3mm MLF-10L (θ
JA
) ............................60.7°C/W
ePad MSOP-10 (θ
JA
) ......................................76.7°C/W
Electrical Characteristics
(5)
V
IN
= V
OUT
+ 0.4V; V
EN
= 1.1V; I
OUT
= 10mA; C
CP
= 0.1µF; C
OUT
= 47µF; T
J
= 25°C.
Bold
values indicate –40°C
≤
T
J
≤
+125°C, unless
noted.
Parameter
Power Supply Input
Input Voltage Range (V
IN
)
Ground Pin Current
Ground Current in Shutdown
Reference
Feedback Pin Voltage (FB Pin)
Output Voltage Accuracy
(SENSE Pin)
Load Regulation
Line Regulation
(6)
FB Pin Current
Current Limit
Current Limit
Dropout Voltage
Dropout Voltage (V
IN
−
V
OUT
)
Notes:
1.
2.
3.
4.
5.
6.
Exceeding the absolute maximum rating may damage the device.
Devices are ESD sensitive. Handling precautions recommended. Human body model (HBM), 1.5k in series with 100pF.
The device is not guaranteed to function outside its operating rating.
P
D(MAX)
= (T
J(MAX)
– T
A
) /
θ
JA
, where
θ
JA
, depends upon the printed circuit layout. See “Applications Information.”
Specification for packaged product only.
∆V
OUT
(%) = (0.12)
×
∆V
IN
Condition
Min.
1.1
Typ.
Max.
3.6
Units
V
mA
µA
I
OUT
= 3A; V
IN
= 1.4V
I
OUT
= 3A; V
IN
= 3.6V
V
EN
= 0V; V
IN
= 2V; V
OUT
= 0V
1.8
7.6
0.1
15
10
Adjustable Output
0.495
0.4875
0.500
0.500
0
0
0.505
0.5125
+1
+2.5
0.35
V
%
%
%/V
µA
Fixed Output
I
OUT
= 10mA to 3A
V
IN
= (V
OUT
+ 0.4V) to 3.6V
V
FB
= 0.5V
−1
−2.5
−0.35
−0.2
0.12
0.01
0.2
1
V
OUT
= 0V
3.5
4.7
A
I
OUT
= 3A
150
350
mV
September 2010
3
M9999-092910-A
Micrel, Inc.
MIC61300
Electrical Characteristics
(5)
(Continued)
V
IN
= V
OUT
+ 0.4V; V
EN
= 1.1V; I
OUT
= 10mA; C
CP
= 0.1µF; C
OUT
= 47µF; T
J
= 25°C.
Bold
values indicate –40°C
≤
T
J
≤
+125°C, unless
noted.
Parameter
Enable Input
EN Logic Level High
EN Logic Level Low
EN Hysteresis
EN Pin Current
Start-Up Time
Minimum Load Current
Minimum Load Current
Thermal Protection
Over-Temperature Shutdown
Over-Temperature Shutdown
Hysteresis
T
J
Rising
160
5
°C
°C
10
mA
V
EN
= 0.2V (Regulator Shutdown)
V
EN
= 3.6V (Regulator Enabled)
C
CP
= 0.1µF; C
OUT
= 10µF
V
IN
= 1.2V, V
OUT
= 0.5V
1.1
0.6
0.5
100
0.02
15
250
750
0.2
V
V
mV
µA
µs
Condition
Min.
Typ.
Max.
Units
September 2010
4
M9999-092910-A
Micrel, Inc.
MIC61300
Typical Characteristics
Dropout Voltage
vs. Input Voltage
300
DROPOUT VOLTAGE (mV)
250
200
150
100
50
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
INPUT VOLTAGE (V)
I
OUT
= 1.5A
ADJUSTABLE OPTION
V
FB
= 0V
I
OUT
= 3A
GND Pin Current
vs. Input Voltage
20
GROUND CURRENT (mA)
16
12
8
4
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
V
IN
= V
OUT
+ 0.4V
I
OUT
= 3A
Shutdown Ground Current
vs. Input Voltage
1.0
GROUND CURRENT (µA)
0.8
0.6
0.4
0.2
0.0
1.0
2.0
3.0
4.0
V
OUT
= 0V
V
EN
= 0V
I
OUT
= 100mA
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Feedback Voltage
vs. Input Voltage
0.510
FEEDBACK VOLTAGE (V)
Feedback Pin Current
vs. Input Voltage
30
FB PIN CURRENT (nA)
25
20
15
10
5
0
I
OUT
= 0A
V
FB
= 0.5V
Load Regulation
vs. Input Voltage
0.10
LOAD REGULATION (%)
V
OUT
= 1.0V
0.505
I
OUT
= 10mA
0.05
0.500
0.00
V
OUT
= 1.0V
-0.05
I
OUT
= 10mA to 3A
0.495
0.490
1.0
1.5
2.0
2.5
3.0
3.5
4.0
INPUT VOLTAGE (V)
-0.10
1.0
1.5
2.0
2.5
3.0
3.5
4.0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Short-Circuit Current
vs. Input Voltage
10
ENABLE PIN CURRENT (µA)
20
Enable Pin Current
vs. Input Voltage
10
CHARGE PUMP VOLTAGE (V)
8
6
4
2
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Charge Pump Voltage
vs. Input Voltage
CURRENT LIMIT (A)
8
6
4
2
0
1.0
1.5
2.0
2.5
V
OUT
= 0V
15
10
V
OUT
= 1.0V
5
I
OUT
= 10mA
V
EN
= 3.6V
V
OUT
= 0.5V
I
OUT
= 50mA
3.0
3.5
4.0
0
INPUT VOLTAGE (V)
0
1
2
3
4
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
September 2010
5
M9999-092910-A
嵌入式系统
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