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L7987L Folha de dados(PDF) 9 Page - STMicroelectronics

Nome de Peças L7987L
Descrição Electrónicos  Adjustable current limitation
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7987L Folha de dados(HTML) 9 Page - STMicroelectronics

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L7987L
Electrical characteristics
41
Enable
VEN
Device OFF level
0.06
0.30
V
Device ON level
0.35
0.90
V
Soft-start
TSSSETUP Soft start setup time
Delay from UVLO rising to switching
activity
(3)
640
µs
ISS CH
CSS charging current
VSS = GND
4.3
5.0
5.7
µA
Error amplifier
VFB
Voltage feedback
0.792 0.800 0.808
V
VFB
Voltage feedback
(1) 0.788 0.800 0.812
V
VCOMPH
VFB = GND; VSS = 3.2 V
3.2
3.35
3.5
V
VCOMPL
VFB = 1 V; VSS = 3.2 V
0.1
V
IFB
FB biasing current
VFB = 3.6 V
5
50
nA
IOSOURCE
VFB = GND; SS pin floating; VCOMP = 2 V (3)
3.1
mA
IOSINK
Output stage sinking
capability
Unity gain buffer configuration (FB
connected to COMP).COMP voltage
variation due to IOSINK injection lower
than ± 0.1
· VFB.
(3)
5mA
AV0
Error amplifier gain
(3)
100
dB
GBWP
Unity gain buffer configuration (FB
connected to COMP). No load on COMP
pin.
(3)
23
MHz
Synchronization (fan out: 5 slave devices max.)
fSYN MIN Synchronization frequency
FSW floating
280
kHz
VSYNOUT Master output amplitude
ILOAD = 4 mA
2.45
V
ILOAD = 0 A; pin SYNCH floating
3.8
VSYNOW Output pulse width
ILOAD = 0 A; pin SYNCH floating
155
225
275
ns
VSYNIH
SYNCH slave high level
input threshold
2.0
V
VSYNIL
SYNCH slave low level input
threshold
1.0
V
ISYN
Slave SYNCH pull-down
current
VSYNCH = 5 V
400
650
900
µA
VSYNIW Input pulse width
200
ns
PGOOD
VPGDTH PGOOD rising threshold
VFB rising
0.67
0.70
0.73
V
VPGDHYST PGOOD hysteresis
VFB falling
(3)
30
mV
Table 5. Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min.
Typ.
Max. Unit


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