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MIC4930のメーカーはMicrel Semiconductorです、この部品の機能は「Hyper Speed Control 3A Buck Regulator」です。 |
部品番号 | MIC4930 |
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部品説明 | Hyper Speed Control 3A Buck Regulator | ||
メーカ | Micrel Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとMIC4930ダウンロード(pdfファイル)リンクがあります。 Total 17 pages
MIC4930
Hyper Speed Control™ 3A Buck Regulator
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 3.3MHz 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 1µH,
and an output ceramic capacitor as small as 10µF 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 3mm × 4mm 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.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
Input voltage: 2.7V to 5.5V
3A output current
Up to 95% efficiency
Up to 3.3MHz 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
0.01µA shutdown current
Thermal shutdown and current limit protection
Output voltage as low as 0.7V
3mm × 4mm DFN-10L
–40C to +125C junction temperature range
Applications
DTVs
Set-top boxes
Printers
DVD players
Distributed power supplies
Typical Application
Hyper Speed Control is a 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
March 20, 2014
Revision 1.1
1 Page Micrel, Inc.
MIC4930
Absolute Maximum Ratings(3)
PVIN, AVIN Supply Voltage (VIN) .................... –0.3V to +6V
SW Output Switch Voltage (VSW). ..................... –0.3V to VIN
EN, PG (VEN, VPG) ............................................. –0.3V to VIN
FB Feedback Input Voltage (VFB)...................... –0.3V to VIN
Storage Temperature (Ts).........................–65°C to +150°C
ESD Rating(5)........................................................ 2kV, HBM
Operating Ratings(4)
Supply Voltage (VIN) ..................................... +2.7V to +5.5V
Enable Input Voltage (VEN)..................................... 0V to VIN
Junction Temperature Range (TJ).......–40°C ≤ TJ ≤ +125°C
Thermal Resistance
DFN-10 (JA) ......................................................35°C/W
Electrical Characteristics(6)
VIN = VEN = 3.3V; L = 1.0µH; TA = 25°C, CIN = 10µH, COUT = 10µH unless otherwise specified.
Bold values indicate –40°C≤ TJ ≤ +85°C, unless otherwise noted.
Symbol
Parameter
Condition
VIN
VUVLO
VUVLOH
IQ
ISD
VFB
ILIMIT
LINEREG
LOADREG
RDSON-P
RDSON-N
Supply voltage range
Undervoltage lockout threshold
Undervoltage lockout hysteresis
Quiescent current
Shutdown current
Feedback voltage
Current limit
Output voltage line regulation
Output voltage load regulation
PWM switch ON resistance
(turn-on)
IOUT = 0mA, FB >1.2 × VFB(Nominal)
VEN = 0V
FB = 0.9V × VFB(Nominal)
VIN = 2.7V to 3.5V, VOUTNOM = 1.8V,
ILOAD = 20mA
VIN = 4.5V to 5.5V if VOUTNOM ≥2.5V,
ILOAD = 20mA
20mA < ILOAD < 500mA, VIN = 3.6V
if VOUTNOM < 2.5V
20mA < ILOAD < 500mA, VIN = 5.0V
if VOUTNOM ≥ 2.5V
20mA < ILOAD < 3A, VIN = 3.6V
if VOUTNOM < 2.5V
20mA < ILOAD < 3mA, VIN = 5.0V
if VOUTNOM ≥ 2.5V
ISW = 1A P-Channel MOSFET
ISW = 1A N-Channel MOSFET
Min.
2.7
2.41
0.609
3.5
Typ.
2.5
400
0.8
0.01
0.625
5.75
Max.
5.5
2.61
2
2
0.640
8
Units
V
V
mV
mA
µA
V
A
1 %/V
0.3 %
1%
30
mΩ
25
March 20, 2014
3
Revision 1.1
3Pages Micrel, Inc.
Typical Characteristics (Continued)
MIC4930
Switching Frequency
vs. Temperature
3.0
2.8
2.6
2.4 VIN = 3.3V
VOUT = 1.8V
IOUT = 0A
2.2
2.0
-50
-20 10 40 70 100
TEMPERATURE (°C)
130
March 20, 2014
6
Revision 1.1
6 Page | |||
ページ | 合計 : 17 ページ | ||
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PDF ダウンロード | [ MIC4930 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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