MD1423R Shindengen America, Inc., MD1423R Datasheet
MD1423R
Manufacturer Part Number
MD1423R
Description
Step Down DC - DC Converter Power IC
Manufacturer
Shindengen America, Inc.
Datasheet
1.MD1423R.pdf
(2 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MD1423R
Manufacturer:
SHINDENG
Quantity:
20 000
U097−2
Step Down DC - DC Converter Power IC
MD1423R
Feature
Block Diagram
Standard Connection Diagram
GND
8∼40V
INPUT
R/C
18
*Please consult with us when it is desired to make
output adjustable in a range over 5.3V.
＋
ON/OFF
Control
ON
amp-
13
Input Voltage range 8V to 40V
Maximum Output Current 3A
Built_in MOSFETs for main switch and synchronous rectification
Adjustable output from 2.5V to 12V with external resistors
Adjustable oscillation frequency from 100kHz to 500kHz
with external resistors
V
11
ref
3∼6
19
18
14
＋
−
2.45V
Error Amp
11
Start=7.2V
Stop=6.7V
MD1423R
Reference
5.0V±5 ％
20
Bandgap
UVLO
V
19
10
cc
ampOUT
9,17
12
8
26
1,2,22∼25
16
15
13
12
Vref=6.5V
OSC
10
BOOT
OSC
V
TSD
boot
20
PWM Comp
＋
−
100℃
3V
1V
2.5∼12V
150℃
OUTPUT
Frequency
adjustable
GND
29
R
High/Low
MOS OFF
Q
S
Vref=V
0.1∼0.2V
CLM Vth=
S/S OCL- OCL+
HighSide
14
footprint
Pin Assignment ( LSSOP26 )
＋
−
OUT
(See the marking specification for the indication on the device)
V
Small
8
B
Dead Time
15
+5.8V
ampOUT
Control
Vref=6.5V
LowSide
amp-
V
V
GND
OSC
16
Vref
V
V
V
V
V
OUT
OUT
V
DD
DD
DD
DD
GH
High Efficiency typ. 96%
( at : Vin = 8V, Vout = 5V, Iout = 1A, f=100kHz )
Over Current Protection
Thermal Shut Down
Remote On / Off
B
HighSide
adjustable
Driver
LowSide
Output
10
11
12
13
1
2
3
4
5
6
7
8
9
Driver
GND
9,17
Remote
On/Off
V
V
21
GH
7
GL
V
3∼6
DD
Synchronous
Rectification
1,2,22∼25
26
25
24
23
22
21
20
19
18
17
16
15
14
26
P.GND
V
P.GND
V
V
V
V
V
V
V
R/C
GND
OCL+
OCL-
S/S
OUT
OUT
OUT
OUT
GL
boot
CC
OUT
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