MIC23150
4MHz PWM 2A Buck Regulator with
HyperLight Load™
General Description
The MIC23150 is a high efficiency 4MHz 2A synchronous
buck regulator with HyperLight Load™ mode. HyperLight
Load™ provides very high efficiency at light loads and
ultra-fast transient response which is perfectly suited for
supplying processor core voltages. An additional benefit
of this proprietary architecture is very low output ripple
voltage throughout the entire load range with the use of
small output capacitors. The tiny 2mm x 2mm Thin MLF
®
package saves precious board space and requires only
three external components.
The MIC23150 is designed for use with a very small
inductor, down to 0.47µH, and an output capacitor as small
as 2.2 µF that enables a total solution size, less than 1mm
height.
The MIC23150 has a very low quiescent current of 23µA
and achieves a peak efficiency of 93% in continuous
conduction mode. In discontinuous conduction mode, the
MIC23150 can achieve 87% efficiency at 1mA.
The MIC23150 is available in 8-pin 2mm x 2mm Thin
MLF
®
package with an operating junction temperature
range from –40°C to +125°C.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
•
•
•
•
•
•
•
•
Input voltage: 2.7V to 5.5V
HyperLight Load™
2A output current
Up to 93% peak efficiency
87% typical efficiency at 1mA
23µA typical quiescent current
4MHz PWM operation in continuous mode
Ultra fast transient response
Low ripple output voltage
−
14mVpp ripple in HyperLight Load
™
mode
−
5mV output voltage ripple in full PWM mode
Fully integrated MOSFET switches
0.01µA shutdown current
Thermal shutdown and current limit protection
Output Voltage as low as 0.95V
8-pin 2mm x 2mm Thin MLF
®
–40°C to +125°C junction temperature range
•
•
•
•
•
•
Applications
•
Mobile handsets
•
Portable media/MP3 players
•
Portable navigation devices (GPS)
•
WiFi/WiMax/WiBro modules
•
Solid State Drives/Memory
•
Wireless LAN cards
•
Portable applications
____________________________________________________________________________________________________________
Typical Application
U1 MIC23150
VIN
C1
EN
L1
VOUT
100
90
Efficiency
V
= 1.8V
OUT
VIN = 2.7V
V = 3.0V
IN
V = 3.6V
IN
VIN
SW
2mm×2mm
ThinMLF SNS
C2
80
70
60
EN
AGND
PGND
GND
50
40
1
GND
L = 1.0µH
C
= 4.7µF
OUT
10
100
1000 10000
OUTPUT CURRENT (mA)
HyperLight Load is a trademark of Micrel, Inc.
MLF and
MicroLeadFrame
are registered trademark 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
October 2009
M9999-102309-B
Micrel Inc.
MIC23150
Ordering Information
Part Number
MIC23150-CYMT
MIC23150-4YMT
MIC23150-55YMT
MIC23150-GYMT
MIC23150-SYMT
Notes:
1. Other options available (0.95V - 3.6V). Contact Micrel Marketing for details.
2. Thin MLF is GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
3. Thin MLF
▲
= Pin 1 identifier.
®
®
Marking
Code
QKC
QK4
QKZ
QKG
QKS
Nominal Output
Voltage
1.0V
1.2V
1.35V
1.8V
3.3V
Junction
Temp. Range
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
8-Pin 2mm x 2mm Thin MLF
®
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
8-Pin 2mm x 2mm Thin MLF
®
Pin Configuration
SW
SW
EN
SNS
1
2
3
4
8
7
6
5
PGND
VIN
VIN
AGND
(Top View)
2mm x 2mm Thin MLF (MT)
Pin Description
Pin Number
1,2
3
4
5
6,7
8
Pin Name
SW
EN
SNS
AGND
VIN
PGND
Pin Function
Switch (Output): Internal power MOSFET output switches.
Enable (Input): Logic high enables operation of the regulator. Logic low
will shut down the device. Do not leave floating.
Sense: Connect to V
OUT
as close to output capacitor as possible to sense
output voltage.
Analog Ground: Connect to central ground point where all high current
paths meet (C
IN
, C
OUT
, PGND) for best operation.
Input Voltage: Connect a capacitor-to-ground to decouple the noise.
Power Ground.
October 2009
2
M9999-102309-B
Micrel Inc.
MIC23150
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) . ……………………………………….6V
Sense (V
SNS
).. ..................................................................6V
Output Switch Voltage (V
SW
) ............................................6V
Enable Input Voltage (V
EN
).. ..............................-0.3V to V
IN
Storage Temperature Range .. ……………-65°C to +150°C
ESD Rating
(3)
..................................................................2kV
Operating Ratings
(2)
Supply Voltage (V
IN
)... …………………………..2.7V to 5.5V
Enable Input Voltage (V
EN
) .. ……………………….0V to V
IN
Junction Temperature Range (T
J
)... ….-40°C
≤
T
J
≤
+125°C
Thermal Resistance
2mm x 2mm Thin MLF-8 (θ
JA
) ...........................90°C/W
Electrical Characteristics
(4)
T
A
= 25°C; V
IN
= V
EN
= 3.6V; L = 1.0µH; C
OUT
= 4.7µF unless otherwise specified.
Bold
values indicate –40°C
≤
T
J
≤
+125°C, unless noted.
Parameter
Supply Voltage Range
Under-Voltage Lockout Threshold
Under-Voltage Lockout Hysteresis
Quiescent Current
Shutdown Current
Output Voltage Accuracy
Current Limit
Output Voltage Line Regulation
Output Voltage Load Regulation
PWM Switch ON-Resistance
Switching Frequency
SoftStart Time
Enable Threshold
Enable Input Current
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
Condition
(turn-on)
I
OUT
= 0mA , SNS > 1.2 * V
OUT
Nominal
V
EN
= 0V; V
IN
= 5.5V
V
IN
= 3.6V if V
OUTNOM
< 2.5V, I
LOAD
= 20mA
V
IN
= 4.5V if V
OUTNOM
≥
2.5V, I
LOAD
= 20mA
SNS = 0.9*V
OUTNOM
V
IN
= 3.6V to 5.5V if V
OUTNOM
< 2.5V, I
LOAD
= 20mA
V
IN
= 4.5V to 5.5V if V
OUTNOM
≥
2.5V, I
LOAD
= 20mA
20mA < I
LOAD
< 500mA, V
IN
= 3.6V if V
OUTNOM
< 2.5V
20mA < I
LOAD
< 500mA, V
IN
= 5.0V if V
OUTNOM
≥
2.5V
I
SW
= 100mA PMOS
I
SW
= -100mA NMOS
I
OUT
= 120mA
V
OUT
= 90%
Turn-On
Min
2.7
2.45
Typ
2.55
75
23
0.01
Max
5.5
2.65
40
5
+2.5
Units
V
V
mV
µA
µA
%
A
%/V
%/A
Ω
MHz
µs
-2.5
2.2
3.4
0.3
0.75
0.150
0.110
4
115
0.5
0.8
0.1
160
20
1.2
2
V
µA
°C
°C
October 2009
3
M9999-102309-B
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