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L4973D3.3 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 3.5A STEP DOWN SWITCHING REGULATOR - STMicroelectronics

भाग संख्या L4973D3.3
समारोह 3.5A STEP DOWN SWITCHING REGULATOR
मैन्युफैक्चरर्स STMicroelectronics 
लोगो STMicroelectronics लोगो 
पूर्व दर्शन
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<?=L4973D3.3?> डेटा पत्रक पीडीएफ

L4973D3.3 pdf
L4973V3.3 - L4973V5.1 - L4973D3.3 - L4973D5.1
uses an internal power D-MOS transistor (with a
typical Rdson of 0.15ohm) to obtain very high effi-
ciency and very fast switching times.
Switching frequency up to 300KHz are achievable
(the maximum power dissipation of the packages
must be observed).
A wide input voltage range between 8V to 55V
and output voltages regulated from 3.3V to 40V
cover the majority of the today applications.
Features of this new generation of DC-DC con-
verter includes pulse by pulse current limit, hiccup
mode for output short circuit protection, voltage
feed forward regulation, soft start, input/output
synchronization, protection against feedback loop
disconnection, inhibit for zero current consump-
tion and thermal shutdown.
Packages available are in plastic dual in line, DIP-
18 (12+3+3) for standard assembly, and SO20
(12+4+4) for SMD assembly.
PIN CONNECTIONS (Top view)
OSC
OUT
OUT
GND
GND
GND
VCC
VCC
BOOT
1
2
3
4
5
6
7
8
9
18 SYNC
17 SS
16 V5.1
15 GND
14 GND
13 GND
12 VFB
11 COMP
10 INH
D94IN162A
POWERDIP (12+3+3)
OSC
OUT
OUT
GND
GND
GND
GND
VCC
VCC
BOOT
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
D94IN163A
SO20 (12+4+4)
SYNC
SS
V5.1
GND
GND
GND
GND
VFB
COMP
INH
BLOCK DIAGRAM
INH
10(11)
ZERO CURRENT
INHIBIT
VREF
GOOD
17(19)
SS
11(12)
COMP
VFB
5.1V
3.3V
12(13)
+
E/A
-
SOFT
START
THERMAL
SHUTDOWN
-
PWM
+
SYNC
18(20)
OSCILLATOR
2/16
Pin x = Powerdip
Pin (x) = S020
1(1)
OSC
5.1V
3.3V
V5.1
16(18)
INTERNAL
REFERENCE
VCC
7(8)
VCC
8(9)
CBOOT
CHARGE
INTERNAL
SUPPLY
5.1V
HICCUP CURRENT
LIMITING
CURRENT
LIMITING
RQ
SQ
BOOT
9(10)
4,5,6,13,14,15
(4,5,6,7,14,15,16,17)
GND
DRIVER
2(2)
OUT
3(3)
OUT
D94IN161B

विन्यास 16 पेज
डाउनलोड[ L4973D3.3 Datasheet.PDF ]


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