LD3980 Просмотр технического описания (PDF) - STMicroelectronics
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LD3980 Datasheet PDF : 16 Pages
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Electrical characteristics
4
Electrical characteristics
LD3980
Table 4.
Symbol
Electrical characteristics (TJ = 25°C, VI = VO(NOM) +0.5V, CI = CO = 1µF, IO = 1mA,
VSHDN = VI, unless otherwise specified) (Note: 1)
Parameter
Test conditions
Min. Typ. Max. Unit
VI
VO
∆VO
∆VO
VDROP
eN
SVR
IQ
ISC
IO(PK)
VSHDN
Operating input voltage
VO Accuracy
IO = 300mA
TJ = -40° to 85°C
Line regulation
VI = VO + 0.5V to 3.6V, IO = 1mA
Load regulation
IO = 1mA to 300mA
Dropout voltage (Note 2)
IO = 300mA, VO ≥ 1.8V
TJ = -40° to 85°C
Output noise voltage
10Hz to 100KHz, IO = 10mA,
Supply voltage rejection
(Figure 7.)
VI = VO(NOM)+0.5V±VRIPPLE
VRIPPLE = 0.1V, f = 1KHz, IO = 10mA
VIN = VO(NOM)+0.5V±VRIPPLE
VRIPPLE = 0.1V, f=10KHz, IO = 10mA
IO=0mA
Quiescent current
IO=0mA, TJ = -40° to 85°C
ON MODE: VSHDN=1.4V IO=0 to 300mA
IO=0 to 300mA, TJ = -40° to 85°C
Quiescent current
OFF MODE: VSHDN=GND
VI input current
Short circuit current
RL=0
Peak output current
VO ≥ VO(NOM) -5%
Shutdown input logic low
VI = 1.6V to 3.6V TJ = -40° to 85°C
Shutdown input logic high
1.7
-1.0
-2.0
-0.15
1.4
ISHDN Shutdown input current VSHDN=GND or VI
TON Turn on time
Note 3
TSHDN Thermal shutdown
Note 4
Capacitance
1
CO Output capacitor
ESR
10
0.01
0.2
130
110.7
60
58
90
105
0.15
650
610
0.1
120
140
3.6
+1.0
+2.0
+0.15
0.3
V
%
%/V
%/mA
150
mV
µVRMS/VO
dB
110
µA
130
0.5
mA
mA
0.4
V
100
nA
µs
°C
10
µF
5000
mΩ
Note: 1 For VO(NOM) < 1.2V, VI=1.7V
2 Dropout voltage is the input-to-output voltage difference at which the output voltage is
100mV below its nominal value. This specification does not apply for output voltages below
1.7V.
3 Turn-on time is time measured between the enable input just exceeding VSHDN High Value
and the output voltage just reaching 95% of its nominal value
4 Typical thermal protection hysteresis is 15°C.
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