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FAN5353 データシート(PDF) 4 Page - Fairchild Semiconductor

部品番号 FAN5353
部品情報  3MHz, 3A Synchronous Buck Regulator
PDF  13 Pages
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メーカー  FAIRCHILD [Fairchild Semiconductor]
ホームページ  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5353 データシート(HTML) 4 Page - Fairchild Semiconductor

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© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5353 • Rev. 1.0.2
4
Electrical Characteristics
Minimum and maximum values are at VIN = 2.7V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at
TA = 25°C, VIN =5V.
Symbol Parameter
Conditions
Min.
Typ.
Max.
Units
Power Supplies
IQ
Quiescent Current
ILOAD = 0, VOUT=1.2V
14
mA
I SD
Shutdown Supply Current
EN = GND
0.1
3.0
μA
VUVLO
Under-Voltage Lockout Threshold
VIN Rising
2.83
2.95
V
VIN Falling
2.10
2.30
2.40
V
VUVHYST
Under-Voltage Lockout Hysteresis
530
mV
Logic Pins
VIH
HIGH-Level Input Voltage
1.05
V
VIL
LOW-Level Input Voltage
0.4
V
VLHYST
Logic Input Hysteresis Voltage
100
mV
IIN
Input Bias Current
Input tied to GND or VIN
0.01
1.00
μA
IOUTL
PGOOD Pull-Down Current
VPGOOD = 0.4V
1
mA
IOUTH
PGOOD HIGH Leakage Current
VPGOOD = VIN
0.01
1
μA
VOUT Regulation
VREF
Output Reference DC Accuracy
Measured at FB Pin
TA = 25°C
0.792
0.800
0.808
V
0.788
0.800
0.812
V
VREG
VOUT DC Accuracy
At VOUT pin W.R.T. Calculated
Value, ILOAD = 500mA
1.6%
+1.6
%
LOAD
OUT
I
V
Δ
Δ
Load Regulation
IOUT(DC) = 0 to 3A
–0.03
%/A
IN
OUT
V
V
Δ
Δ
Line Regulation
2.7V ≤ VIN ≤ 5.5V, IOUT(DC) =
1.5A
0.01
%/V
Transient Response
ILOAD step 0.1A to 1.5A, tr = tf =
100ns, VOUT=1.2V
+20
mV
Power Switch and Protection
RDS(ON)P
P-channel MOSFET On Resistance
60
mΩ
RDS(ON)N
N-channel MOSFET On Resistance
40
mΩ
ILIMPK
P-MOS Peak Current Limit
3.75
4.55
5.50
A
TLIMIT
Thermal Shutdown
150
°C
THYST
Thermal Shutdown Hysteresis
20
°C
VSDWN
Input OVP Shutdown
Rising Threshold
6.2
V
Falling Threshold
5.50
5.85
V
Frequency Control
fSW
Oscillator Frequency
2.7
3.0
3.3
MHz
Soft-Start
tSS
Regulator Enable to Regulated VOUT
RLOAD > 5Ω, to VOUT = 1.2V
210
250
μs
RLOAD > 5Ω, to VOUT = 1.8V
340
420
μs
VSLEW
Soft-Start VOUT Slew Rate
10
V/ms



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