MIC23030
8MHz PWM 400mA Buck Regulator with
HyperLight Load™
General Description
The MIC23030 is a high efficiency 8MHz 400mA
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 1.6mm x
1.6mm Thin MLF
®
package saves precious board space
and requires only three external components.
The MIC23030 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 sub-1mm height.
The MIC23030 has a very low quiescent current of 21µA
and achieves as high as 83% efficiency at 1mA. At higher
loads, the MIC23030 provides a constant switching
frequency around 8MHz while achieving peak efficiencies
up to 91%.
The MIC23030 is available in a 6-pin 1.6mm x 1.6mm 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™
400mA output current
Up to 91% efficiency and 83% at 1mA
21µA typical quiescent current
8MHz PWM operation in continuous mode
Ultra fast transient response
Low voltage output ripple
−
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
Fixed and adjustable output voltage options available
6-pin 1.6mm x 1.6mm 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
•
Digital Cameras
•
Wireless LAN cards
•
USB powered devices
•
Portable applications
____________________________________________________________________________________________________________
Typical Application
U1 MIC23030
V
IN
2.7V to 5.5V
C1
EN
4
1
100
SW
2
Efficiency V
OUT
= 2.5V
V
IN
= 3.0V
V
IN
= 3.6V
V
IN
= 4.2V
V
OUT
L1
EFFICIENCY (%)
VIN
90
80
70
60
EN
AGND
SNS
PGND
6
3
C2
GND
5
GND
L = 0.47µH
C
OUT
= 4.7µF
1
10
100
1000
OUTPUT CURRENT (mA)
50
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
August 2008
M9999-082608-B
Micrel Inc.
MIC23030
Ordering Information
Part Number
MIC23030-AYMT
MIC23030-GYMT*
MIC23030-FYMT*
MIC23030-4YMT
MIC23030-CYMT*
Notes:
1. Other options available. Contact Micrel for details.
2. Thin MLF is GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
*
Available August 2008.
®
Marking
Code
GDA
GDG
GDF
GD4
GDC
Nominal Output
Voltage
ADJ
1.8V
1.5V
1.2V
1.0V
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
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
6-Pin 1.6mm x 1.6mm Thin MLF
®
Pin Configuration
VIN
SW
SNS
1
2
3
6
5
4
PGND
AGND
EN
VIN
SW
SNS
1
2
3
6
5
4
GND
FB
EN
1.6 x 1.6mm Thin MLF
®
(MT)
Fixed (Top View)
1.6 x 1.6mm Thin MLF
®
(MT)
Adjustable (Top View)
Pin Description
Fixed Option
1
2
3
4
5
-
6
-
E-PAD
ADJ Option
1
2
3
4
-
5
-
6
E-PAD
Pin Name
VIN
SW
SNS
EN
AGND
FB
PGND
GND
HS PAD
Pin Function
Input Voltage: Connect a capacitor to ground to decouple the noise.
Switch (Output): Internal power MOSFET output switches.
Sense: Connect to V
OUT
as close to output capacitor as possible to sense
output voltage.
Enable (Input): Logic high enables operation of the regulator. Logic low
will shut down the device. Do not leave floating.
Analog Ground: Connect to central ground point where all high current
paths meet (C
IN
, C
OUT
, PGND) for best operation.
Feedback (Input): Connect resistor divider at this node to set output
voltage. Resistors should be selected based on a nominal V
FB
of 0.62V.
Power Ground.
Ground.
Connect to PGND or GND.
August 2008
2
M9999-082608-B
Micrel Inc.
MIC23030
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) . ……………………………………….6V
Sense (V
SNS
).. ..................................................................6V
Output Switch Voltage ..................................................6V
Enable Input Voltage (V
EN
).. ..............................-0.3V to V
IN
Storage Temperature Range .. ……………-65°C to +150°C
ESD Rating
(3)
................................................. ESD Sensitive
Operating Ratings
(2)
Supply Voltage (V
IN
)... …………………………..2.7V to 5.5V
Enable Input Voltage (V
EN
) .. ……………………….0V to V
IN
Output Voltage Range (V
SNS
) ………………….0.7V to 3.6V
Junction Temperature Range (T
J
)... ….-40°C
≤
T
J
≤
+125°C
Thermal Resistance
1.6mm x 1.6mm Thin MLF-6 (θ
JA
) ..................92.4°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
Quiescent Current
Shutdown Current
Output Voltage Accuracy
Feedback Voltage
Current Limit
Output Voltage Line Regulation
Output Voltage Load Regulation
(turn-on)
I
OUT
= 0mA , SNS > 1.2 * V
OUT
Nominal
V
EN
= 0V; V
IN
= 5.5V
V
IN
= 3.6V; I
LOAD
= 20mA
Adjustable Option Only
SNS = 0.9*V
OUTNOM
V
IN
= 3.0V to 5.5V, V
OUT
= 1.2V, I
LOAD
= 20mA,
20mA < I
LOAD
< 400mA, V
OUT
= 1.2V,
V
IN
= 3.6V
I
SW
= 100mA PMOS
I
SW
= -100mA NMOS
I
OUT
= 120mA
V
OUT
= 90%
0.5
0.41
-2.5
0.62
0.7
0.3
0.7
0.65
0.8
8
100
0.9
0.1
160
20
1.2
2
1
Condition
Min
2.7
2.45
2.55
21
0.01
Typ
Max
5.5
2.65
35
4
+2.5
Units
V
V
µA
µA
%
V
A
%/V
%
Ω
MHz
µs
V
µA
°C
°C
PWM Switch ON-Resistance
Maximum 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.
August 2008
3
M9999-082608-B
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