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L6902D Datasheet(PDF) 3 Page - STMicroelectronics

No. de pieza L6902D
Descripción Electrónicos  UP TO 1A SWITCHING REGULATOR WITH ADJUSTABLE CURRENT LIMIT
PDF  7 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6902D Datasheet(HTML) 3 Page - STMicroelectronics

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L6902D
Figure 4. Internal Block Diagram
Table 5. Electrical Characteristcs
(Tj = 25°C, VCC = 12V, unless otherwise specified.) (•) Specification Referred to Tj from 0 to 125°C.
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VCC
Operating input voltage range
VO = 1.235V; IO = 1A
•
8
36
V
Vd
Dropout voltage
VCC = 8V; IO = 1A
•
0.25
0.5
V
IO
Operating charging current
Rsense = 0.1Ω
0.9511.05
A
•
0.92
1.08
A
Il
Maximum limiting current
VCC = 8V to 36V
•
2
2.5
3.2
A
fs
Switching frequency
•
212
250
287
kHz
225
250
275
kHz
d
Duty cycle
0
100
%
DYNAMIC CHARACTERISTICS
V5
Voltage feedback (FB)
8V < VCC < 36V,
20mA < IO < 1A
1.21
1.235
1.259
V
•
1.198
1.235
1.272
V
η
Efficiency
VO = 5V, VCC = 12V
90
%
DC CHARACTERISTICS
Iqop
Total operating quiescent
current
•3
5
mA
Iq
Quiescent current
Duty cycle = 0; VFB = 1.5V
3
mA
VREF
GOOD
3.8V
COMP
VFB
DRIVER
INHIBIT
+
-
1.235V
E/A
1.235V
THERMAL
SHUTDOWN
-
+
PWM
OSCILLATOR
OUT
Vcc
GND
Vref
SUPPLY
TRIMMING
FREQUENCY
SHIFTER
VOLTAGES
MONITOR
D
Q
CK
CURRENT LIMITING
PEAK TO PEAK
+
-
Current_E/A
Voltage_E/A
CS-
CS+



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