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SM8172A 数据表(PDF) 2 Page - Nippon Precision Circuits Inc

部件名 SM8172A
功能描述  2-output Power Supply IC
Download  17 Pages
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制造商  NPC [Nippon Precision Circuits Inc]
网页  http://www.npc.co.jp/en
标志 NPC - Nippon Precision Circuits Inc

SM8172A 数据表(HTML) 2 Page - Nippon Precision Circuits Inc

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SM8172A
SEIKO NPC CORPORATION —2
6. PINOUT
(Top view)
7. PIN DESCRIPTION
8. BLOCK DIAGRAM
Number
Name
I/O
Function
1
VIN2
Supply voltage (series regulator, internal circuits)*1
*1. VIN1 and VIN2 should have the same voltage potential.
2
LDOUT
O
Series regulator output*2
*2. When the series regulator is not used, LDOUT pin should be open and not be connected to GND.
3
GND
Ground (internal circuits)
4
ENDCO
Ip*3
*3. Ip = Input with pull-down resistor built-in
Output enable (DC/DC converter)
5
ENLDO
Ip*3
Output enable (series regulator)
6
PGND
Ground (DC/DC converter output circuit)
7
LX
O
DC/DC converter coil drive*4
*4. When the DC/DC converter is not used, LX pin should be open and not be connected to GND or the supply.
8
VIN1
Supply voltage (DC/DC converter output circuit)*1
9
FB
I
DC/DC converter feedback connection*5
*5. When the DC/DC converter is not used, FB pin should be connected to GND.
10
RESETN
O
Reset signal output (active-LOW, open-drain output)*6
*6. When the reset signal is not used, RESETN pin should be connected to GND.
10
9
8
7
6
1
2
3
4
5
VIN2
LDOUT
GND
ENDCO
ENLDO
RESETN
FB
VIN1
LX
PGND
VIN2
RESETN
Delay
circuits
Current
protection
ENDCO
GND
VIN2
detector
Soft
start
Vref
+
ERR
LDOUT
Thermal
protection
OSC
Soft
start
Current
protection
ERR
+
FB
Current mode
PWM control
Output
control
VIN1
LX
PGND
RESETN output
LDOUT output
(3.3V)
3.3
µF
5.0V
10
µF
2.2
µH
10k
4.7
µF
DCOUT
(1.0V)
10
µF
5.0V
ENLDO
8pF
220k
330k


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