MIC37110/MIC37112
MIC37120/MIC37122
High-Performance, Low-Noise,
1A LDOs
General Description
The MIC37110/MIC37112 and MIC37120/MIC37122 are
high-performance, low-noise, low dropout regulators. Each
of these LDOs is capable of sourcing 1A output current,
offers high power supply rejection, and low output noise.
These general purpose LDOs are most suitable for
consumer applications such as multimedia devices, set-top
boxes, Blu-ray players, handheld devices, and gaming
consoles.
The MIC37112 and MIC37122 feature adjustable output
voltages while the MIC37110 and MIC37120 come in fixed
1.8V output voltage options. All devices feature 2% initial
output voltage accuracy, typical dropout of 230mV at 1A,
and low ground current.
This family of low-noise regulators is available in 2mm x
®
2mm Thin MLF , SOIC-8 and SOT-223 packages and they
all have 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
•
Input voltage range: 2.375V to 5.5V
•
Output voltage adjustable down to 1.0V
(MIC37112/MIC37122)
•
Stable with small, 2.2µF ceramic output capacitor
•
230mV typical dropout at 1A
•
1A minimum guaranteed output current
•
±2.0% initial accuracy
•
Low ground current
•
High PSRR: >60dB, up to 1kHz
•
Output auto-discharge circuit (MIC37120/MIC37122)
•
Thermal-shutdown and current-limit protection
Applications
•
•
•
•
•
Mobile phones and consumer multimedia devices
Set-top boxes and Blu-ray players
Gaming consoles
Tablets and handheld devices
GPS receivers
___________________________________________________________________________________________________________
Typical Application
Dropout Voltage
vs. Output Current
400
DROPOUT VOLTAGE (mV)
V
IN
= 2.5V
V
ADJ
= 0.95 * 1.0V
ADJUSTABLE OPTION
T
A
= 25ºC
300
200
100
0
0.0
0.2
0.4
0.6
0.8
1.0
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
December 2012
M9999-121312-A
Micrel, Inc.
MIC37110/MIC37112
MIC37120/MIC37122
Ordering Information
Part Number
(1,2)
Output Voltage
1.8V
1.8V
1.8V
Adjustable
Adjustable
1.8V
1.8V
Adjustable
Adjustable
Top Mark
ZHG
−
GHZ
−
AZZ
−
1H8
−
ZAZ
Output Auto-Discharge
No
No
No
No
No
Yes
Yes
Yes
Yes
Package
SOT-223-3L
SOIC-8L
2mm
×
2mm Thin MLF-6L
SOIC-8L
2mm
×
2mm Thin MLF-6L
SOIC-8L
2mm
×
2mm Thin MLF-6L
SOIC-8L
2mm
×
2mm Thin MLF-6L
MIC37110-1.8YS
MIC37110-1.8YM
MIC37110-1.8YMT
MIC37112YM
MIC37112YMT
MIC37120-1.8YM
MIC37120-1.8YMT
MIC37122YM
MIC37122YMT
Note:
1.
2.
RoHS compliant with ‘high-melting solder’ exemption.
Temperature range is -40°C to +125°C
Pin Configuration
SOT-223 (S)
MIC371x0-1.8 (Fixed)
2mm x 2mm Thin MLF - 6 Lead (MT)
MIC371xx (Fixed/Adjustable)
8-Pin SOIC (M)
MIC371x0-1.8 (Fixed)
8-Pin SOIC (M)
MIC371x2 (Adjustable)
December 2012
2
M9999-121312-A
Micrel, Inc.
MIC37110/MIC37112
MIC37120/MIC37122
Pin Description
Pin Number
SOT-223 -3L
—
1
3
Pin Number
SOIC-8
(Fixed)
1
2
3
Pin Number
SOIC-8
(Adjustable)
1
2
3
4
—
—
—
2, TAB
—
5-8
4
5-8
—
5
2
6
SNS
GND
NC
Pin Number
2mm
×
2mm
Thin MLF-6L
1
3
4
5
Pin Name
Pin Description
Enable (Input): CMOS-compatible control input.
Logic high = enable, logic low = shutdown.
Supply (Input).
Regulator Output.
Adjustment Input: Feedback input. Connect to
resistive voltage-divider network to set the output
voltage of the MIC37112/MIC37122.
Output Voltage Sense Input. Connect this pin at
the point-of-load to monitor the output voltage of
the fixed output voltage options.
Ground.
Not internally connected
EN
IN
OUT
ADJ
December 2012
3
M9999-121312-A
Micrel, Inc.
MIC37110/MIC37112
MIC37120/MIC37122
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ......................................... -0.3V to +6V
Enable Voltage (V
EN
). ....................................... -0.3V to +V
IN
Adjust Pin Voltage (V
ADJ
).................................. -0.3V to +V
IN
Lead Temperature (soldering, 5s) .............................. 260°C
Storage Temperature (T
s
) ......................... –65°C to +150°C
(3)
ESD Rating
HBM ......................................................................... 3kV
Operating Ratings
(2)
Supply Voltage (V
IN
) ................................. +2.375V to +5.5V
Enable Voltage (V
EN
). ............................................. 0V to V
IN
(4)
Power Dissipation (P
D(max)
)………………Internally Limited
Junction Temperature (T
J
) ........................ –40°C to +125°C
Package Thermal Resistance
SOT-223 (θ
JA
) .................................................... 40°C/W
SOIC-8 (θ
JA
) ....................................................... 63°C/W
Thin MLF-6 (θ
JA
) .............................................. 100°C/W
Electrical Characteristics
(5)
V
IN
= V
EN
= V
OUT
+ 1V; I
OUT
= 10mA; C
IN
= 1.0 µF; C
OUT
= 2.2µF; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤ +125°C,
unless noted.
Parameter
Power Supply Input
Input Voltage Range (V
IN
)
Input Supply UVLO
Input Supply UVLO Hysteresis
Ground Pin Current
(6)
Condition
Min.
Typ.
Max.
Units
2.375
5.5
2.2
100
V
V
mV
10mA
≤
I
OUT
≤
1.0A
V
EN
= V
OUT
= 0V
250
0.1
500
5
µA
µA
Ground Current in Shutdown
Reference
Adjust Pin Voltage
Output Voltage Accuracy
Load Regulation
Line Regulation
ADJ Pin Current
Current Limit
Current Limit
Dropout Voltage
Dropout Voltage (V
IN
−
V
OUT
)
(7)
Adjustable Option
Fixed Option
I
OUT
= 10mA to 1A
V
IN
= (V
OUT
+
1V) to 5.5V
V
ADJ
= 1.0V
0.975
-2
-2.5
-1.0
1
1.025
+2
+2.5
+1.0
V
%
%
%
µA
0.05
0.01
0.5
1
V
OUT
= 0V
1.2
2.3
4.0
A
I
OUT
= 1A
230
400
mV
Load Discharge Resistance (MIC37120/MIC37122)
Load Discharge Resistance
Enable Input
Enable Logic Level High
Enable Logic Level Low
EN Hysteresis
EN Pin Current
V
EN
= 0.2V (Regulator Shutdown)
V
IN
= V
EN
= 3.6V (Regulator Enabled)
1.2
0.75
0.65
100
0.1
0.1
1
1
0.25
V
V
mV
µA
V
EN
= 0V; V
IN
= 3.6V; I
OUT
= 3mA
30
Ω
December 2012
4
M9999-121312-A
Micrel, Inc.
MIC37110/MIC37112
MIC37120/MIC37122
Electrical Characteristics
(5)
(Continued)
V
IN
= V
EN
= V
OUT
+ 1V; I
OUT
= 10mA; C
IN
= 1.0 µF; C
OUT
= 2.2µF; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤ +125°C,
unless noted.
Parameter
Enable Input
Start-Up Time
Minimum Load Current
Minimum Load Current
Thermal Protection
Over-Temperature Shutdown
Over-Temperature Shutdown
Hysteresis
Notes:
1.
2.
3.
4.
5.
6.
7.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
P
D(max)
= (T
J(max)
– T
A
) ÷ θ
JA
, where θ
JA
depends upon the printed circuit layout. See “Applications Information” section.
Specification for packaged product only.
I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT
.
V
DO
= V
IN
– V
OUT
when V
OUT
decreases to 98% of its nominal output voltage with V
IN
= V
OUT
+ 1V. For output voltages below 2.25V, dropout voltage
is the input-to-output voltage differential with the minimum input voltage being 2.25V. The minimum input operating voltage is 2.375V.
Condition
Min.
Typ.
Max.
Units
140
500
µs
10
mA
T
J
Rising
160
15
°C
°C
December 2012
5
M9999-121312-A
FPGA/CPLD
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