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744042 データシート(PDF) 3 Page - Microchip Technology

部品番号 744042
部品情報  24V Input, 1A/2A Output, High Efficiency Synchronous Buck Regulator with Power Good Indication
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

744042 データシート(HTML) 3 Page - Microchip Technology

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© 2011 Microchip Technology Inc.
DS22285A-page 3
MCP16321/2
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
VIN.................................................................... -0.3V to 26.4V
SW ...................................................................... -1V to 26.4V
BOOST – GND ........................................... -0.3V to (VIN+6V)
EN,VFB, PG Voltage.............................................. -0.3V to 6V
Continuous Total Power Dissipation .......................................
...................................................See Thermal Characteristics
Storage Temperature ....................................-65°C to +150°C
Operating Junction Temperature...................-40°C to +125°C
ESD Protection On All Pins:
HBM ......................................................................... 3 kV
MM ..........................................................................200V
† 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.
DC CHARACTERISTICS
Electrical Characteristics:
Unless otherwise indicated, TA = +25°C, VIN =12V, VOUT = 3.3V, IOUT = 300 mA,
L= 4.7 µH, COUT =2x22 µF, CIN =2x10µF. Boldface specifications apply over the TJ range of -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
VIN Supply Voltage
Input Voltage
VIN
6.0
24
V
Quiescent Current
(Switching)
IQ
—5.2
mA
IOUT = 0 mA
Quiescent Current
(Non-Switching)
IQ
2.3
mA
Closed Loop in
Overvoltage
IOUT = 0 mA
Quiescent Current -
Shutdown
IQ
—5
10
µA
EN = 0
VIN Undervoltage Lockout
Undervoltage Lockout Start
UVLOSTRT
5.5
5.75
6.0
VVIN Rising
Undervoltage Lockout
Hysteresis
UVLOHYS
0.65
V
Non-Switching
Output Characteristics
Maximum Output Current
MCP16321
IOUT
1
——
A
VIN = 6V to 24V
Maximum Output Current
MCP16322
IOUT
2
——
A
VIN = 6V to 24V
Output Voltage Adjust Range
VOUT
0.9
5.0
V
Output Voltage Tolerance
in PWM Mode
VOUT-PWM
VOUT -2%
VOUT
VOUT +2%
VIOUT = 1A
Output Voltage Tolerance
in PFM Mode
VOUT-PFM
VOUT -1% VOUT +1% VOUT +3.5%
VIOUT = 0A
Feedback Voltage
VFB
0.886
0.9
0.914
V
Feedback Reference
Tolerance
VFB-TOL
-1.5
1.5
%
PFM Mode Feedback
Comparator Threshold
VFB-PFM
—VOUT + 1%
V
Feedback Input Bias
Current
IFB
—100
nA
Note 1:
Regulator SW pin is forced off for 240 ns every 8 cycles to ensure the BOOST cap is replenished.


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