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FAN53541 Arkusz danych(PDF) 5 Page - Fairchild Semiconductor

Numer części FAN53541
Szczegółowy opis  2.4 MHz, 5 A TinyBuck Synchronous Buck Regulator
PDF  15 Pages
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Producent  FAIRCHILD [Fairchild Semiconductor]
Strona internetowa  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN53541 Arkusz danych(HTML) 5 Page - Fairchild Semiconductor

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© 2013 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN53541 • Rev. 1.0.2
5
Electrical Characteristics
Minimum and maximum values are at VIN=2.7 V to 5.5 V, and TA=-40°C to +85°C, unless otherwise noted. Typical values are
at TA=25°C, VIN=5 V, and VOUT=1.2 V.
Symbol
Parameter
Condition
Min.
Typ.
Max. Unit
Power Supplies
IQ
Quiescent Current
ILOAD=0, MODE=0 (AUTO PFM/PWM)
50
µA
ILOAD=0, MODE=1 (Forced PWM)
30
mA
I SD
Shutdown Supply Current
EN=GND
0.1
10
µA
VUVLO
Under-Voltage Lockout Threshold
VIN Rising
2.67
2.80
V
VIN Falling
2.1
2.3
V
VUVHYST
Under-Voltage Lockout Hysteresis
365
mV
Logic Pins
VIH
High-Level Input Voltage
1.05
V
VIL
Low-Level Input Voltage
0.4
V
VLHYST
Logic Input Hysteresis Voltage
140
mV
IIN
Input Bias Current
Input Tied to GND or 1 k
Ω Resistor to VIN
0.01
1.00
µA
IOUTL
PGOOD Pull-Down Current
VPGOOD=0.4 V
1
mA
IOUTH
PGOOD HIGH Leakage Current
VPGOOD=VIN
0.01
1.00
µA
VOUT Regulation
VREF
Output Reference DC Accuracy,
Measured at FB Pin
TA=25°C, Forced PWM
0.792
0.800
0.808
V
TA=-40°C to 85°C, Forced PWM
0.787
0.800
0.813
V
AUTO PFM/PWM
0.784
0.800
0.824
V
Load Regulation
MODE=VIN (Forced PWM)
–0.02
%/A
Line Regulation
2.7
V ≤ VIN ≤ 5.5 V, IOUT(DC)=1.5 A
-0.16
%/V
IREF
FB Pin Leakage Current
FB=0.8 V
1
nA
V
OUT
Transient Response
ILOAD Step 0.1 A to 1.5 A, tR=100 ns
-30
mV
Power Switch and Protection
RDS(ON)P
P-Channel MOSFET On Resistance
33
mΩ
RDS(ON)N N-Channel MOSFET On Resistance
28
mΩ
ILIMPK
P-MOS Peak Current Limit
Open Loop
5.8
7.5
8.8
A
Closed Loop
8
A
TLIMIT
Thermal Shutdown
155
°C
THYST
Thermal Shutdown Hysteresis
20
°C
VSDWN
Input OVP Shutdown
Rising Threshold
6.1
V
Falling Threshold
5.5
5.8
V
Frequency Control
fSW
Oscillator Frequency
2.1
2.4
3.0
MHz
fMODE
MODE Pin Synchronization Range
External Square-Wave, 30% to 70% Duty
Cycle
525
600
700
kHz
Soft-Start and Output Discharge
tSS
Regulator Enable to Regulated VOUT
(Rising PGOOD)
1.2
ms
RDIS
Output Discharge Resistance
EN=0 V
175
Ω
LOAD
OUT
I
V
IN
OUT
V
V



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