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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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Electrical characteristics
ST1S03
6/17
4
Electrical characteristics
Table 4.
Electrical characteristics (VIN_SW = VIN_A = 5V, CI = 4.7µF, CO = 22µF, L1 = 3.3µH,
TJ = 0 to 125°C, unless otherwise specified. Typical values are referred to 25°C)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
FB
Feedback voltage
784
800
816
mV
PSRR
Feedback PSRR
1Hz < Frequency VIN
-60
dB
IFB
VFB Pin bias current
600
nA
BW
Bandwidth of error amplifier
Closed Loop
300
KHz
IQ
Quiescent current
No Switching
2.5
mA
IO
Output current
VIN =3V to 16V
1.5
A
IMIN
Minimum output current
1
mA
%VO/∆VIN Reference line regulation
VIN = 3V to 16V
0.032
0.06
%VO/
∆VIN
%VO/∆IO
Reference load regulation
IO = 10mA to 1.2A
0.0014
0.003
%VO/
mA
PWM fS
PWM Switching frequency (1)
1.
Guaranteed by design, but not tested in production.
VFB = 0.8V, TA =25°C
1.2
1.5
1.8
MHz
DMAX
Maximum duty cycle
87
%
ISWL
Switching current limitation
1.65
A
VDS
Switch VDS
ISW = 750 mA
200
350
mV
E
Efficiency
IO =10mA to 1.2A
70
%
TSHDN
Thermal shut down (1)
130
150
°C
THYS
Thermal shut down hysteresis (1)
15
°C
∆VO/∆IO Load transient response (1)
IO = 100mA to 700mA
tR = tF ≥ 100ns, TA = 25°C
-5
+5
%VO
∆VO/∆IO@
IO=short
Short circuit removal response(1) IO = 10mA to short, TA = 25°C
+5
%VO


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