MIC33030
8MHz 400mA Internal Inductor Buck
Regulator with HyperLight Load™
General Description
The MIC33030 is a high-efficiency, 8MHz, 400mA
synchronous buck regulator with an internal inductor and
HyperLight Load™ mode. HyperLight Load™ provides
very-high efficiency at light loads and ultra-fast transient
response that is perfectly suited for supplying processor
core voltages. An additional benefit of this proprietary
architecture is the very-low output ripple voltage
throughout the entire load range with the use of small
output capacitors. The tiny 2.5mm x 2.0mm MLF
®
package
saves precious board space and requires only two external
capacitors.
The MIC33030 is designed for use with tiny output
capacitors as small as 2.2µF. This gives the MIC33030 the
ease of use of an LDO with the efficiency of a HyperLight
Load™ DC converter.
The MIC33030 achieves efficiency in HyperLight Load™
mode as high as 78% at 1mA, with a very-low quiescent
current of 21µA. At higher loads, the MIC33030 provides a
constant switching frequency up to 8MHz.
The MIC33030 is available in a 10-pin 2.5mm x 2.0mm
MLF
®
package with an operating junction temperature
range of –40°C to +125°C.
Datasheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Features
•
Internal Inductor
−
Simplifies design to two external capacitors
•
Input voltage: 2.7V to 5.5V
•
Output voltage accuracy of ±2.5% over temperature
•
400mA output current
•
Efficiency up to 78% at 1mA
•
21µA typical quiescent current
•
Up to 8MHz PWM operation in continuous mode
•
Ultra-fast transient response
•
Low-voltage output ripple
−
30mVpp ripple in HyperLight Load
™
mode
−
7mV 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
(0.7V to 3.6V)
•
2.5mm x 2.0mm 10-Lead 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
Fixed-Output MIC33030
HyperLight Load is a trademark of Micrel, Inc.
MLF and
MicroLeadFrame
are registered trademark Amkor Technology Inc.
Adjustable-Output MIC33030
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
February 2011
M9999-020311-C
Micrel Inc.
MIC33030
Ordering Information
Part Number
MIC33030-AYHJ
MIC33030-JYHJ
MIC33030-GYHJ
MIC33030-4YHJ
Notes:
1.
2.
Other options available. Contact Micrel for details.
Thin MLF is GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
Marking
Code
3GFA
3GFJ
3GFG
3GF4
Nominal Output
Voltage
ADJ
2.5V
1.8V
1.2V
Junction Temperature
Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
10-pin 2.5mm x 2.0mm MLF
®
10-pin 2.5mm x 2.0mm MLF
®
10-pin 2.5mm x 2.0mm MLF
®
10-pin 2.5mm x 2.0mm MLF
®
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pin Configuration
2.5mm x 2.0mm MLF
®
(HJ)
Fixed (Top View)
2.5mm x 2.0mm MLF
®
(HJ)
Adjustable (Top View)
Pin Description
Fixed Option
1
2
−
3
4, 5
6, 7
8
9
10
EP
ADJ Option
1
−
2
3
4, 5
6, 7
8
9
10
EP
Pin Name
SNS
NC
FB
EN
SW
VOUT
PGND
AGND
VIN
HS PAD
Pin Function
Sense: Connect to V
OUT
as close to output capacitor as possible to sense
output voltage.
Not internally connected.
Feedback: Connect resistor divider at this node to set output voltage. Resistors
should be selected based on a nominal V
FB
= 0.62V.
Enable: Logic high enables operation of the regulator. Logic low will shut down
the device. Do not leave floating.
Switch: Internal power MOSFET output switches.
Output Voltage: The output of the regulator. Connect to SNS pin. For adjustable
option, connect to feedback resistor network.
Power Ground.
Analog Ground.
Input Voltage: Connect a capacitor to ground to decouple the noise.
Connect to PGND or AGND.
February 2011
2
M9999-020311-C
Micrel Inc.
MIC33030
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ........................................... -0.3V to 6V
Sense (V
SNS
)....................................................... -0.3V to 6V
Output Switch Voltage .................................... -0.3V to 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
2.5mm x 2.0mm MLF
®
-10 (θ
JA
) .........................76°C/W
2.5mm x 2.0mm MLF
®
-10 (θ
JC
) .........................45°C/W
Electrical Characteristics
(4)
T
A
= 25°C; V
IN
= V
EN
= 3.6V; 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
Feedback Voltage
Current Limit
Output Voltage Line Regulation
Output Voltage Load Regulation
PWM Switch ON-Resistance
Maximum Frequency
Soft Start Time
Enable Threshold
Enable Hysteresis
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; 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%
Min.
2.7
2.45
Typ.
2.55
100
21
0.01
Max.
5.5
2.65
35
4
+2.5
Units
V
V
mV
µA
µA
%
V
-2.5
0.62
0.41
0.7
0.5
0.7
0.65
0.8
8
100
0.5
0.9
35
0.1
160
20
1
A
%/V
%
Ω
Ω
MHz
µs
1.2
2
V
mV
µA
°C
°C
February 2011
3
M9999-020311-C
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