MIC23163/4
4MHz, 2A, 100% Duty Cycle Buck Regulator
with HyperLight Load
®
and Power Good
General Description
The MIC23163/4 is a high-efficiency, 4MHz, 2A,
®
synchronous buck regulator with HyperLight Load (HLL)
mode and maximum 100% duty cycle. HLL provides very-
high efficiency at light loads and ultra-fast transient
response which makes the MIC23163/4 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 2.0mm × 2.0mm DFN
package saves precious board space and requires only
three external components.
The MIC23163/4 is designed for use with a very small
0.47µH inductor and 10µF output capacitor that enables a
total solution size, less than 1mm height.
The MIC23163/4 has a very low quiescent current of 33µA
and achieves as high as 85% efficiency at 1mA. At higher
loads, the MIC23163/4 provides a constant switching
frequency around 4MHz while achieving peak efficiencies
up to 93%. The MIC23164 incorporates an active
discharge feature that switches an 180Ω FET to ground to
discharge the output when the part is disabled.
The MIC23163/4 is available in 10-pin 2.0mm × 2.0mm
DFN package with an operating junction temperature
range from –40°C to +125°C.
Datasheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Input voltage: 2.7V to 5.5V
100% duty cycle
2A output current
Up to 93% peak efficiency
85% typical efficiency at 1mA
Programmable soft-start with pre-bias start-up capability
Power Good (PG) Indicator
4MHz PWM operation in continuous mode
Ultra-fast transient response
Low ripple output voltage
Fully-integrated MOSFET switches
0.1µA shutdown current
Thermal shutdown and current-limit protection
10-pin 2.0mm × 2.0mm Thin DFN
–40°C to +125°C junction temperature range
Disable pull down 180Ω (MIC23164 only)
Applications
•
•
•
•
•
•
•
Cellular modems
Mobile handsets
Portable media/MP3 players
Portable navigation devices (GPS)
WiFi/WiMax/WiBro modules
Digital cameras
Wireless LAN cards
Typical Application
HyperLight Load is a registered trademark of Micrel, 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
June 29, 2013
Revision 2.0
Micrel, Inc.
MIC23163/4
Ordering Information
Part Number
MIC23163YMT
MIC23164YMT
Note:
1. DFN is a GREEN, RoHS-compliant package. Mold compound is Halogen Free.
2. DFN ▲ = Pin 1 identifier.
Marking
Code
QAQ
KQA
Output
Voltage
ADJ
ADJ
Auto
Discharge
No
Yes
Junction Temperature Range
–40°C to +125°C
–40°C to +125°C
Package
(1,
2)
10-Pin 2mm × 2mm Thin DFN
10-Pin 2mm × 2mm Thin DFN
Pin Configuration
2mm × 2mm DFN (MT)
Adjustable Output Voltage
(Top View)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
EP
Pin Name
SW
EN
FB
NC
PG
SS
AGND
AVIN
PVIN
PGND
ePad
Pin Function
Switch (Output): Internal power MOSFET output switches. Disable pull down 180Ω
(MIC23164 only).
Enable (Input): Logic high enables operation of the regulator. Logic low will shut down the
device. Do not leave floating.
Feedback: Connect a resistor divider from the output to ground to set the output voltage.
Not Internally Connected.
Power Good: Open drain output for the power good indicator. Use a pull-up resistor from this pin
to a voltage source to detect a power good condition.
Soft Start: Place a capacitor from this pin to ground to program the soft start time. Do not leave
floating, 100pF minimum C
SS
is required.
Analog Ground: Connect to central ground point where all high-current paths meet (C
IN
, C
OUT
,
PGND) for best operation.
Analog Input Voltage: Connect a capacitor to ground to decouple the noise.
Power Input Voltage: Connect a capacitor to PGND to decouple the noise.
Power Ground.
Exposed Pad. Connect to GND.
July 29, 2013
2
Revision 2.0
Micrel, Inc.
MIC23163/4
Absolute Maximum Ratings
(3)
Supply Voltage (V
AVIN
, V
PVIN
) .............................
−0.3V
to 6V
Power Good Voltage (V
PG
) ................................
−0.3V
to 6V
Output Switch Voltage (V
SW
) .............................
−0.3V
to 6V
Enable Input Voltage (V
EN
) .. ..............................−0.3V to V
IN
Junction Temperature (T
J
) ....................................... +150°C
Storage Temperature Range (T
S
) .............
−65°C
to +150°C
Lead Temperature (soldering, 10s) ............................ 260°C
(5)
ESD Rating ................................................. ESD Sensitive
Operating Ratings
(4)
Supply Voltage (V
AVIN
, V
PVIN
) ............................ 2.7V to 5.5V
Enable Input Voltage (V
EN
) .. ……………………….0V to V
IN
Feedback Voltage (V
FB
) ...................................... 0.7V to V
IN
Junction Temperature Range (T
J
).. ….−40°C
≤
T
J
≤
+125°C
Thermal Resistance
2mm x 2mm Thin
DFN
-10 (θ
JA
) ......................... 90°C/W
2mm x 2mm Thin
DFN
-10 (θ
JC
) ......................... 45°C/W
Electrical Characteristics
(6)
T
A
= 25°C; V
IN
= V
EN
= 3.6V; L = 0.47µH; C
OUT
= 10µF unless otherwise specified.
Bold
values indicate –40°C ≤ T
J
≤ +125°C, unless
otherwise noted.
Parameter
Supply Voltage Range
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
Quiescent Current
Shutdown Current
Output Voltage Accuracy
Feedback Regulation Voltage
Current Limit
Output Voltage Line Regulation
V
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
Output Voltage Load Regulation
20mA
<
I
LOAD
<
500mA, V
IN
= 5.0V if V
OUTNOM
≥
2.5V
20mA
<
I
LOAD
<
1A, V
IN
= 3.6V if V
OUTNOM
<
2.5V
20mA
<
I
LOAD
<
1A, V
IN
= 5.0V if V
OUTNOM
≥
2.5V
PWM Switch ON-Resistance
Switching Frequency
Soft-Start Time
Soft-Start Current
Power Good Threshold (Rising)
Notes:
3. Exceeding the absolute maximum ratings may damage the device.
4. The device is not guaranteed to function outside its operating ratings.
5. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
6. Specification for packaged product only.
Condition
Min.
2.7
Typ.
Max.
5.5
Units
V
V
mV
(Turn-On)
I
OUT
= 0mA , V
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
2.40
2.53
75
33
0.1
2.65
55
5
+2.5
µA
µA
%
V
A
%/V
−2.5
0.68
2.5
0.7
3.3
0.3
0.72
0.3
%
0.3
0.13
0.13
4
1000
2.2
85
90
95
Ω
MHz
µs
µA
%
I
SW
= 100mA PMOS
I
SW
=
−100mA
NMOS
I
OUT
= 120mA
V
OUT
= 90%, C
SS
= 1nF
V
SS
= 0V
% of V
NOM
July 29, 2013
3
Revision 2.0
Micrel, Inc.
MIC23163/4
Electrical Characteristics
(6)
(Continued)
T
A
= 25°C; V
IN
= V
EN
= 3.6V; L = 0.47µH; C
OUT
= 10µF unless otherwise specified.
Bold
values indicate –40°C ≤ T
J
≤ +125°C, unless
otherwise noted.
Parameter
Power Good Threshold Hysteresis
Power Good Pull-Down
Enable Threshold
Enable Input Current
Overtemperature Shutdown
Overtemperature Shutdown
Hysteresis
SW Pull-Down Resistance
(MIC23164 only)
V
EN
= 0V
V
SNS
= 90% V
NOMINAL
, I
PG
= 1mA
Turn-On
0.5
0.8
0.1
160
20
180
Condition
Min.
Typ.
7
200
1.2
2
Max.
Units
%
mV
V
µA
°C
°C
Ω
July 29, 2013
4
Revision 2.0
Micrel, Inc.
MIC23163/4
Typical Characteristics
Efficiency vs. Output Current
V
OUT
= 1.8V @ 25°C
95
90
85
V
IN
= 3V
Efficiency vs. Output Current
V
OUT
= 3.3V @ 25°C
100
95
90
V
IN
= 4.2V
100000
V
IN
= 5V
1000000
V
OUT
Rise Time vs. C
SS
EFFICIENCY (%)
EFFICIENCY (%)
80
75
70
65
60
55
50
1
10
V
IN
= 3.6V
85
80
75
70
65
60
55
50
RISE TIME (µs)
V
IN
= 5V
10000
1000
100
10
V
IN
= 3.6V
1
10
100
1000
10000
1
1000
10000
100000
1000000
100
1000
10000
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
C
SS
(pF)
Current Limit vs.
Input Voltage
3.8
50
Quiscent Current vs.
Input Voltage
50
48
IQ vs. Temperature
3.6
45
46
44
CURRENT LIMIT (A)
3.4
40
IQ (µA)
IQ (µA)
T
CASE
= 25°C
42
40
38
36
34
32
30
V
IN
= 3.6V
3.2
35
3
30
2.8
T
CASE
= 25°C
2.6
2.5
3.0
3.5
4.0
4.5
5.0
5.5
25
20
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40
-20
0
20
40
60
80
100
120
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
Line Regulation
(Light Loads)
1.864
1.863
1.870
1.868
Line Regulation
(High Loads)
1.820
1.815
I
OUT
= 1A
Output Voltage vs.
Output Current (DCM)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
1.861
1.860
1.859
1.858
1.857
1.856
1.855
1.854
2.5
3.0
3.5
4.0
4.5
5.0
5.5
I
OUT
= 130mA
I
OUT
= 30mA
1.864
1.862
1.860
1.858
1.856
1.854
1.852
1.850
2.5
OUTPUT VOLTAGE (V)
1.862
1.866
1.810
1.805
1.800
1.795
V
IN
= 3.6V
1.790
I
OUT
= 300mA
3.0
3.5
4.0
4.5
5.0
5.5
0
20
40
60
80 100 120 140 160 180 200
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
July 29, 2013
5
Revision 2.0
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