MIC33153
4 MHz 1.2A Internal Inductor PWM Buck Regulator
with HyperLight Load
®
and Power Good
Features
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Internal Inductor
Simplifies Design to Two External Capacitors
Input Voltage: 2.7V to 5.5V
Output Voltage: Fixed or Adjustable (0.62V to
3.6V)
Up to 1.2A Output Current
Up to 93% Peak Efficiency
85% Typical Efficiency at 1 mA
Power Good (PG) Output
Programmable Soft-Start
22 μA Typical Quiescent Current
4 MHz PWM Operation in Continuous Mode
Ultra-Fast Transient Response
Low Ripple Output Voltage
- 35 mV
PP
Ripple in HyperLight Load
®
Mode
- 7 mV Output Voltage Ripple in Full PWM
Mode
0.01 μA Shutdown Current
Thermal Shutdown and Current Limit Protection
14-pin 3.0 x 3.5 x 1.1 mm TDFN Package
–40°C to +125°C Junction Temperature Range
Solid State Drives (SSD)
Mobile Handsets
Portable Media/MP3 Players
Portable Navigation Devices (GPS)
WiFi/WiMax/WiBro Modules
Wireless LAN Cards
Portable Applications
General Description
The MIC33153 is a high-efficiency 4 MHz 1.2A
synchronous buck regulator with an internal inductor,
HyperLight Load
®
mode, Power Good (PG) output
indicator, and programmable soft-start. HyperLight
Load
®
provides very high efficiency at light loads and
ultra-fast transient response which makes the
MIC33153 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 MIC33153 is designed so that only two external
capacitors as small as 2.2 μF are needed for stability.
This gives the MIC33153 the ease of use of an LDO
with the efficiency of a HyperLight Load
®
DC converter.
The MIC33153 achieves efficiency in HyperLight
Load
®
mode as high as 85% at 1 mA, with a very low
quiescent current of 22 μA. At higher loads, the
MIC33153 provides a constant switching frequency up
to 4 MHz.
The MIC33153 is available in 14-pin 3.0 mm x 3.5 mm
TDFN package with an operating junction temperature
range from –40°C to +125°C.
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Applications
2019 Microchip Technology Inc.
DS20006223A-page 1
MIC33153
Typical Application Circuits
Fixed Output MIC33153
J
Adjustable Output MIC33153
J
Package Types
14-Pin 3.0 mm x 3.5 mm TDFN
Fixed (Top View)
14-Pin 3.0 mm x 3.5 mm TDFN
Adjustable (Top View)
DS20006223A-page 2
2019 Microchip Technology Inc.
MIC33153
Functional Block Diagrams
Simplified MIC33153 Fixed Output Functional Block
Simplified MIC33153 Adjustable Output Functional Block
2019 Microchip Technology Inc.
DS20006223A-page 3
MIC33153
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (V
IN
)....................................................................................................................................... –0.3 to +6V
Sense Voltage (V
SNS
) ..................................................................................................................................... –0.3 to V
IN
Output Switch Voltage (V
SW
) .......................................................................................................................... –0.3 to V
IN
Enable Input Voltage (V
EN
) ............................................................................................................................. –0.3 to V
IN
Power Good (PG) Voltage (V
PG
)..................................................................................................................... –0.3 to V
IN
ESD Rating (Note
1)...................................................................................................................................ESD
Sensitive
Storage Temperature Range (T
S
) ..........................................................................................................–65°C to +150°C
Lead Temperature (soldering, 10 sec.)....................................................................................................................260°C
Operating Ratings ‡
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
3.0 mm x 3.5 mm TDFN-14 (
JA
) ......................................................................................................................... 55°C/W
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability. Specifications are for packaged product only.
‡ Notice:
The device is not guaranteed to function outside its operating ratings.
Note 1:
Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5 kΩ in series
with 100 pF.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics:
T
A
= 25°C, V
IN
= V
EN
= 3.6V; C
OUT
= 4.7 μF; unless otherwise specified.
Bold
values
indicate –40°C ≤ T
J
≤ +125°C.
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
Symbol
—
—
—
—
—
—
—
—
—
Min.
2.7
2.45
—
—
—
–2.5
0.6045
2.2
—
Typ.
—
2.55
75
22
0.01
—
0.62
3.3
0.3
—
Max.
5.5
2.65
—
45
5
+2.5
0.6355
—
—
%/V
Units
V
V
mV
μA
μA
%
V
A
Conditions
—
Turn-On
—
I
OUT
= 0 mA, SNS > 1.2 * V
OUT(NOM)
V
EN
= 0V; V
IN
= 5.5V
V
IN
= 3.6V if V
OUT(NOM)
< 2.5V, I
LOAD
= 20 mA
V
IN
= 4.5V to 5.5V if V
OUT(NOM)
≥
2.5V, I
LOAD
= 20 mA
I
LOAD
= 20 mA
SNS = 0.9*V
OUT(NOM)
V
IN
= 3.6V to 5.5V if V
OUT(NOM)
<
2.5V, I
LOAD
= 20 mA
V
IN
= 4.5V to 5.5V if V
OUT(NOM)
≥
2.5V, I
LOAD
= 20 mA
DS20006223A-page 4
2019 Microchip Technology Inc.
MIC33153
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Characteristics:
T
A
= 25°C, V
IN
= V
EN
= 3.6V; C
OUT
= 4.7 μF; unless otherwise specified.
Bold
values
indicate –40°C ≤ T
J
≤ +125°C.
Parameter
Output Voltage Load
Regulation
Symbol
Min.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
86
—
—
0.5
—
—
—
0.85
0.2
0.19
4
320
2.7
92
7
68
0.9
0.1
160
20
—
—
—
—
—
—
96
—
—
1.2
2
—
—
Ω
MHz
μs
μA
%
%
μs
V
μA
°C
°C
Typ.
0.8
Max.
—
%/A
Units
Conditions
1 mA < I
LOAD
< 1A, V
IN
= 3.6V if
V
OUT(NOM)
< 2.5V
1 mA < I
LOAD
< 1A, V
IN
= 5.0V if
V
OUT(NOM)
≥ 2.5V
I
SW
= 100 mA PMOS
I
SW
= –100 mA NMOS
I
OUT
= 300 mA
V
OUT
= 90%, C
SS
= 470 pF
V
SS
= 0V
—
—
Rising
Turn-On
—
—
—
PWM Switch On-Resistance
Maximum Switching
Frequency
Soft-Start Time
Soft-Start Current
PG Threshold (Rising)
PG Threshold Hysteresis
PG Delay Time
Enable Threshold
Enable Input Current
Overtemperature Shutdown
Overtemperature Shutdown
Hysteresis
2019 Microchip Technology Inc.
DS20006223A-page 5
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