Microchip MIC23031 Bedienungsanleitung
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MIC23031
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2021 Microchip Technology Inc. DS20006538A-page 1
MIC23031
Features
• Input Voltage: 2.7V to 5.5V
• 400 mA Output Current
• Up to 93% Efficiency and 88% at 1 mA
• 21 µA Typical Quiescent Current
• 4 MHz PWM Operation in Continuous Mode
• Ultra-Fast Transient Response
• Low Voltage Output Ripple
- 20 mVPP Ripple in HyperLight Load® Mode
- 3 mV Output Voltage Ripple in Full PWM
Mode
• 0.01 µA Shutdown Current
• MIC23031 Fixed and Adjustable Output Voltage
Options Available
• 1.6 mm x 1.6 mm 6-Lead TDFN Package
• –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
General Description
The MIC23031 is a high-efficiency, 4 MHz, 400 mA
synchronous buck regulator with 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 1.6 mm x 1.6 mm TDFN package saves precious
board space and requires only three external
components.
The MIC23031 is designed for use with a very small
inductor, down to 0.47 µH, and an output capacitor as
small as 2.2 µF that enables a sub 1 mm height.
The MIC23031 has a very low quiescent current of
21 µA and achieves as high as 88% efficiency at 1 mA.
At higher loads, the MIC23031 provides a constant
switching frequency around 4 MHz while achieving
peak efficiencies up to 93%.
The MIC23031 is available in a 6-pin 1.6 mm x 1.6 mm
TDFN package with an operating junction temperature
range of –40°C to +125°C.
Typical Application Circuit
Efficiency VOUT = 2.5V
4 MHz PWM 400 mA Buck Regulator with HyperLight Load®
MIC23031
DS20006538A-page 2 2021 Microchip Technology Inc.
Package Types
Functional Block Diagrams
MIC23031, Fixed
6-Lead TDFN (MT)
(Top View)
1VIN
SW
S
NS
PGN
D
AGND
EN
6
5
2
3 4
1VIN
SW
S
NS
GND
FB
EN
6
5
2
3 4
MIC23031, Adjustable
6-Lead TDFN (MT)
(Top View)
MIC23031 Fixed Output
MIC23031 Adjustable Output
E
N
VIN
SW
FB
SN
S
GND
UVLO
Reference
ISENSE
Gate
Drive
ERROR
COMPARATOR
CONTROL
LOGIC
Tim er &
Softstart
ZERO 1
Current
Limit
E
N
VIN
SW
PGN
D
SNS
AGND
UVLO
Reference
ISENSE
Gate
Drive
ERROR
COMPARATOR
CONTROL
LOGIC
Tim er &
Softstart
ZERO 1
Current
Limit
2021 Microchip Technology Inc. DS20006538A-page 3
MIC23031
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (V IN) ...................................................................................................................................................+6V
Sense (V SNS ) ..............................................................................................................................................................+6V
Output Switch Voltage.................................................................................................................................................+6V
Enable Input Voltage (V EN) ............................................................................................................................–0.3V to V IN
ESD Rating (Note 1) .................................................................................................................................. ESD Sensitive
Operating Ratings ‡
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
† 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: TA = 25°C, L = 1.0 µH, V IN = VEN = 3.6V; C OUT = 4.7 µF; Bold values indicate –40°C ≤ T J
≤ +125°C; unless otherwise specified. Specification for packaged product only.
Parameter Symbol Min. Typ. Max. Units Conditions
Supply Voltage Range V IN 2.7 — 5.5 V —
Undervoltage Lockout
Threshold VUVLO 2.45 2.55 2.65 V Turn-On
Quiescent Current I Q— 21 35 µA I OUT = 0 mA, V SNS > 1.2 * V OUT(NOM)
Shutdown Current I SD — 0.01 4µA VEN = 0V; VIN = 5.5V
Output Voltage Accuracy V OUT –2.5 —+2.5 % VIN = 3.6V; I LOAD = 20 mA
Feedback Voltage V FB — 0.62 — V Adjustable Option Only
Current Limit I LIM 0.41 0.7 1A VSNS = 0.9 * V OUT(NOM)
Output Voltage Line
Regulation LINE_REG — 0.3 — %/V VIN = 3.0V to 5.5V, V OUT = 1.2V,
ILOAD = 20 mA,
Output Voltage Load
Regulation LOAD_REG — 0.7 — % 20 mA < I LOAD < 400 mA,
VOUT = 1.2V, V IN = 3.6V
PWM Switch On-Resistance R DS(ON)
— 0.65 — ΩISW = 100 mA PMOS
— 0.8 — ISW = –100 mA NMOS
Maximum Frequency F MAX — 4 — MHz IOUT = 120 mA
Soft-Start Time t SS — 100 — µs V OUT = 90%
Enable Threshold V EN 0.5 1.20.9 V —
Enable Input Current I EN — 0.1 2µA —
Overtemperature Shutdown T SD — 160 — °C —
Overtemperature Shutdown
Hysteresis TSD_HYS — 20 — °C —
Produktspezifikationen
| Marke: | Microchip |
| Kategorie: | Nicht kategorisiert |
| Modell: | MIC23031 |
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