MIC23153
4MHz PWM 2A Buck Regulator with
HyperLight Load™ and Power Good
General Description
The MIC23153 is a high-efficiency, 4MHz, 2A,
synchronous buck regulator with HyperLight Load™ mode,
Power Good output indicator, and programmable soft-start.
HyperLight Load™ provides very-high efficiency at light
loads and ultra-fast transient response which makes the
MIC23153 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 2.5mm x 2.5mm Thin MLF package
saves precious board space and requires only four
external components.
The MIC23153 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
in height.
The MIC23153 has a very-low quiescent current of 22µA
and achieves a peak efficiency of 93% in continuous
conduction mode. In discontinuous conduction mode, the
MIC23153 can achieve 85% efficiency at 1mA.
The MIC23153 is available in 10-pin 2.5mm x 2.5mm 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
Output voltage: fixed or adjustable (0.62V to 3.6V)
Up to 2A output current
Up to 93% peak efficiency
85% typical efficiency at 1mA
Power Good output
Programmable soft-start
22µA typical quiescent current
4MHz PWM operation in continuous mode
Ultra-fast transient response
Low ripple output voltage
™
−
35mVpp 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
10-pin 2.5mm x 2.5mm Thin MLF
®
–40°C to +125°C junction temperature range
•
•
•
•
•
Applications
•
Solid State Drives (SSD)
•
Mobile handsets
•
Portable media/MP3 players
•
Portable navigation devices (GPS)
•
WiFi/WiMax/WiBro modules
•
Wireless LAN cards
•
Portable applications
____________________________________________________________________________________________________________
Typical Application
Fixed Output Voltage
HyperLight Load is a trademark of Micrel, Inc.
MLF and
MicroLeadFrame
are registered trademark Amkor Technology Inc.
Adjustable Output Voltage
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
September 2011
M9999-092211-B
Micrel Inc.
MIC23153
Ordering Information
Part Number
MIC23153-GYMT
MIC23153YMT
Notes:
1. Other options available (1V - 3.3V). 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
WEG
WEA
Nominal Output Voltage
1.8V
Adjustable
Junction
Temperature Range
–40°C to +125°C
–40°C to +125°C
Package
10-Pin 2.5mm x 2.5mm Thin MLF
®
10-Pin 2.5mm x 2.5mm Thin MLF
®
Pin Configuration
2.5mm x 2.5mm Thin MLF
®
(MT)
Fixed Output Voltage
(Top View)
2.5mm x 2.5mm Thin MLF
®
(MT)
Adjustable Output Voltage
(Top View)
Pin Description
Pin Number
(Fixed)
1
2
3
4
-
5
6
7
8, 9
10
Pin Number
(Adjustable)
1
2
3
-
4
5
6
7
8, 9
10
Pin Name
SW
EN
SNS
NC
FB
PG
SS
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.
Not Internally Connected.
Feedback: Connect a resistor divider from the output to ground to set the output
voltage.
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.
Input Voltage: Connect a capacitor to ground to decouple the noise.
Power Ground.
September 2011
2
M9999-092211-B
Micrel Inc.
MIC23153
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ..........................................
−0.3V
to 6V
Sense Voltage (V
SNS
) ........................................−0.3V to V
IN
Output Switch Voltage (V
SW
) .............................−0.3V to V
IN
Enable Input Voltage (V
EN
)................................−0.3V to V
IN
Power Good Voltage (V
PG
)................................−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
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
Sense Voltage (V
SNS
) ..................................... 0.62V to 3.6V
Junction Temperature Range (T
J
).. ….−40°C
≤
T
J
≤
+125°C
Thermal Resistance
2.5mm x 2.5mm Thin MLF
®
-10 (θ
JA
)..................90°C/W
2.5mm x 2.5mm Thin MLF
®
-10 (θ
JC
) .................63°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
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
Quiescent Current
Shutdown Current
Output Voltage Accuracy
Feedback Regulation Voltage
Current Limit
Output Voltage Line Regulation
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
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
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
I
SW
= 100mA PMOS
I
SW
=
−100mA
NMOS
I
OUT
= 120mA
V
OUT
= 90%, C
SS
= 470pF
V
SS
= 0V
86
Rising
Turn-On
0.5
−2.5
0.6045
2.2
0.62
3.3
0.3
0.3
0.7
0.2
0.19
4
320
2.7
92
7
68
0.9
0.1
160
20
1.2
2
96
(Turn-On)
Condition
Min.
2.7
2.45
2.55
75
22
0.01
45
5
+2.5
0.635
Typ.
Max.
5.5
2.65
Units
V
V
mV
µA
µA
%
V
A
%/V
%
%
Ω
MHz
µs
µA
%
%
µs
V
µA
°C
°C
Output Voltage Load Regulation
PWM Switch ON-Resistance
Switching Frequency
Soft-Start Time
Soft-Start Current
Power Good Threshold (Rising)
Power Good Threshold Hysteresis
Power Good Delay 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.
September 2011
3
M9999-092211-B
Micrel Inc.
MIC23153
Typical Characteristics
Efficiency v s. Output Current
V
OUT
= 1.8V @ 25°C
Efficiency v s. Output Current
V
OUT
= 3.3V @ 25°C
100%
90%
80%
EFFICIENCY (%)
70%
60%
50%
40%
30%
20%
10%
0%
1
1
10
100
1000
OUT PUT CURRENT (mA)
10000
100
1000
10000
100000 1000000
CSS (pF)
V
IN
= 5.5V
V
IN
= 4.2V
V
IN
= 5V
100%
90%
80%
EFFICIENCY (%)
70%
60%
50%
40%
30%
20%
10%
1000000
100000
RISE TIM E (µs)
10000
1000
100
10
V
OUT
Rise Tim e
v s. C
SS
V
IN
= 5V
V
IN
= 3V
V
IN
= 3.6V
V
IN
= 3.6V
1
10
100
1000
OUT PUT CURRENT (mA)
10000
Current Limit
v s. Input Voltage
4.0
3.5
CURRENT LIM IT (A)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5
3.0
3.5
4.0
4.5
INPUT VOLT AGE (V)
5.0
5.5
T
CASE
= 25°C
Shutdown Current
v s. Input Voltage
30
SHUTDOWN CURRENT (nA)
25
OUTPUT VOLTAGE (V)
20
15
10
5
T
CASE
= 25°C
Line Regulation
(Low Loads)
1.900
1.875
1.850
1.825
1.800
1.775
1.750
1.725
1.700
5.5
I
OUT
= 1mA
I
OUT
= 130mA
I
OUT
= 20mA
0
2.5
3.0
3.5
4.0
4.5
5.0
INPUT VOLT AGE (V)
2.5
3.0
3.5
4.0
4.5
5.0
INPUT VOLT AGE (V)
5.5
Line Regulation
(High Loads)
1.90
Output Voltage v s.
Output Current (HLL)
1.900
1.875
1.900
1.875
OUTPUT VOLTAGE (V)
1.850
1.825
1.800
1.775
1.750
1.725
1.700
0
0.02
0.04
0.06
0.08
OUT PUT CURRENT (A)
0.1
Output Voltage v s.
Output Current (CCM)
OUTPUT VOLTAGE (V)
I
OUT
= 300mA
OUTPUT VOLTAGE (V)
1.85
1.850
1.825
1.800
1.775
1.750
1.725
1.700
V
IN
= 3.6V
1.80
1.75
I
OUT
= 1A
1.70
2.5
3.0
3.5
4.0
4.5
5.0
INPUT VOLT AGE (V)
5.5
V
IN
= 3.6V
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9
OUT PUT CURRENT (A)
Output Voltage
v s. Temperature
1.85
1.84
OUTPUT VOLTAGE (V)
1.83
PG DELAY (µs)
1.82
1.81
1.80
1.79
1.78
1.77
1.76
1.75
-40 -20
0 20 40 60 80 100 120
T EM PERAT URE (°C)
I
LOAD
= 20mA
PG Delay Tim e
v s. Input Voltage
90
80
PG THRESHOLD (% of VREF)
PG Thresholds
v s. Input Voltage
91%
90%
PG Rising
70
60
50
40
30
20
10
0
2.5
3.0
PG Rising
89%
88%
87%
86%
85%
84%
83%
82%
81%
2.5
3.0
3.5
4.0
4.5
5.0
INPUT VOLT AGE (V)
5.5
PG Falling
PG Falling
3.5
4.0
4.5
5.0
INPUT VOLT AGE (V)
5.5
September 2011
4
M9999-092211-B
Micrel Inc.
MIC23153
Typical Characteristics (Continued)
UVLO Threshold
v s. Tem perature
2.56
2.55
UVLO THRESHOLD (V)
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
-40 -20
0 20 40 60 80 100 120
T EM PERAT URE (°C)
UVLO_OFF
UVLO_ON
Enable Threshold
v s. Input Voltage
1.2
1.1
VEN THRESHOLD (V)
VEN THRESHOLD (V)
1.0
0.9
0.8
0.7
0.6
T
CASE
= 25°C
Enable Threshold
v s. Temperature
1.2
1.1
1.0
0.9
0.8
0.7
0.6
V
IN
= 3.3V
0.5
2.5
3.0
3.5
4.0
4.5
INPUT VOLT AGE (V)
5.0
5.5
0.5
-40 -20
0 20 40 60 80 100 120
T EM PERAT URE (°C)
Switching Frequency
v s. Load Current
10000
L = 2.2µH
Feedback Voltage
v s. Tem perature
0.65
0.64
0.63
0.62
0.61
0.60
0.59
-40 -20
0
20 40 60 80 100 120
T EM PERAT URE (°C)
V
IN
= 2.6V
V
IN
= 3.6V
FEEDBACK VOLTAGE (V)
SW FREQUENCY (kHz)
1000
100
10
1
V
OUT
= 1.8V
V
IN
= 5.5V
L = 1µH
0.1
0.0001
0.001
0.01
0.1
1
10
LOAD CURRENT (A)
September 2011
5
M9999-092211-B
嵌入式系统
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