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PDF MIC4930 Data sheet ( Hoja de datos )
| Número de pieza | MIC4930 | |
| Descripción | Hyper Speed Control 3A Buck Regulator | |
| Fabricantes | Microchip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MIC4930 (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
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MIC4930
Hyper Speed Control® 3A Buck Regulator
Features
• Input Voltage: 2.7V to 5.5V
• 3A Output Current
• Up To 95% Efficiency
• Up To 3.3 MHz Operation
• Safe Start-Up into a Pre-Biased Output
• Power Good Output
• Ultra-Fast Transient Response
• Low Output Voltage Ripple
• Low RDS(ON) Integrated MOSFET Switches
• 0.01 μA Shutdown Current
• Thermal Shutdown and Current Limit Protection
• Output Voltage as low as 0.7V
• 3 mm × 4 mm DFN-10L
• –40°C to +125°C Junction Temperature Range
Applications
• DTVs
• Set-Top Boxes
• Printers
• DVD Players
• Distributed Power Supplies
General Description
The MIC4930 is a high-efficiency, 3A synchronous
buck regulator with ultra-fast transient response
perfectly suited for supplying processor core and I/O
voltages from a 5V or 3.3V bus. The MIC4930 provides
a switching frequency up to 3.3 MHz while achieving
peak efficiencies up to 95%. An additional benefit of
high-frequency operation is very low output ripple
voltage throughout the entire load range with the use of
a small output capacitor. The MIC4930 is designed for
use with a very small inductor, down to 1 μH, and an
output ceramic capacitor as small as 10 μF without the
need for external ripple injection. A wide range of
output capacitor types and values can also be
accommodated.
The MIC4930 supports safe start-up into a pre-biased
output.
The MIC4930 is available in a 10-pin 3 mm × 4 mm
DFN package with an operating junction temperature
range from –40°C to +125°C. The MIC4930 is
pin-to-pin compatible with the 5A-rated MIC4950YFL.
Package Type
MIC4930
3x4 DFN
Top View
PGND 1
EP
PGND 2
PVIN 3
AVIN 4
AGND 5
10 SW
9 EN
8 PVIN
7 PG
6 FB
2016 Microchip Technology Inc.
DS20005669A-page 1
1 page  
MIC4930
TEMPERATURE SPECIFICATIONS (Note 1)
Parameters
Sym. Min. Typ.
Max. Units
Conditions
Temperature Ranges
Storage Temperature
Junction Operating Temperature
TS –65 —
TJ –40 —
+150
+125
°C —
°C —
Package Thermal Resistances
Thermal Resistance, DFN-10Ld
JA —
35
— °C/W —
Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the
maximum allowable power dissipation will cause the device operating junction temperature to exceed the
maximum +125°C rating. Sustained junction temperatures above +125°C can impact the device reliability.
2016 Microchip Technology Inc.
DS20005669A-page 5
5 Page 
MIC4930
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
3X4 DFN
1, 2, EP
3, 8
4
5
6
7
9
10
PIN FUNCTION TABLE
Symbol
Description
PGND
PVIN
AVIN
AGND
FB
PG
EN
SW
Power Ground.
Power input voltage: Connect a 10μF ceramic capacitor between PVIN and PGND
for input decoupling. Pins 3 and 8 are internally connected inside the package.
Analog input voltage: Connect a 1μF ceramic capacitor between AVIN and AGND
to decouple the noise for the internal reference and error comparator.
Analog ground input: Connect to a quiet ground plane for best operation. Do not
route power switching currents on the AGND net. Connect AGND and PGND nets
together at a single point.
Feedback (input): Connect an external divider between VOUT and AGND to
program the output voltage.
Power Good (output): Open-drain output. A pull-up resistor from this pin to a
voltage source is required to detect an output power-is-good condition.
Enable (input): Logic high enables operation of the regulator. Logic low will shut
down the device. Do not leave floating.
Switch (output): Internal power MOSFET output switches.
2016 Microchip Technology Inc.
DS20005669A-page 11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet MIC4930.PDF ] | |
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