U097
−
231
−
＋
＋
−
Vref Vcc
UVLO
START=7.2V
STOP
=6.7V
ON／OFF
Control
Boot
Vref=6.5V
HighSide
Vref=VOUT+5.8V
MainSwitch
MOSOFF HighSide
Driver
BandgapReference
Vref=5.0V±5％
Vboot VBVGVDD
23258628
R/C
5
32 30
amp- ampOUT S/S
1
OCL−
216
OCL＋
3
P.GND
CLMVth=
0.1〜0.2V
TSD
Q
R
2.45V S
ErrorAmp PWMComp
100゜C 150゜C
VOUT
18〜21
11〜14
GND
4,26
3V
1V
OSC
f＝250kHz
＋
−
※N/C:7,9,10,15,17,22,24,29,31
＋ ＋
ON
GNDGND
OUTPUT
2.5〜12V
INPUT
8〜57V
MD1622N
116
6
5
28
32
30
2
3
825
18
〜
21
4,26
11
〜
14
N/C
N/C
V
OUT
V
OUT
V
OUT
V
OUT
N/C
P.GND
N/C
V
DD
V
DD
V
DD
V
DD
N/C
VG
N/C
VB
GND
VTS
Vref
N/C
amp
OUT
N/C
amp
−
S/S
OCL
−
OCL＋
GND
R/C
Vcc
N/C
Vboot
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
SHINDENGEN
MD1622N
P
□□□□□
Feature
MD1622N
Step Down DC - DC Converter Power IC
(See the marking specification for the indication on the device)
Block Diagram
Standard Connection Diagram Pin Assignment (SSOP32)
Input Voltage range 8V to 57V
Maximum Output Current 1.2A
Included main switch MOSFET and fly wheel SBD
Adjustable output from 2.5V to 12V with external resistors
High Efficiency typ. 90% (at:Vin=8V, Vout=5V, Iout=0.5A)
Fixed Frequency 250kHz PWM Control
Over Current Protection
Under Voltage Lockout
Thermal Shut Down
Remote On / Off
Output adjustable Remote On/Off
48V Input
*Please consult with us when it is desired to make
output adjustable in a range over 5.3V.
U097
−
2
32
Item Symbol
Inputvoltage
ThermalRatings
Junctiontemperature
Thermalresistance
※1
VCC
Tj
θja
θjc
※2
Ratings
60
150
50
20
Units
V
Remotecontrolvoltage V
RC
5.5 V
OCL
-
,OCL
+
inputvoltage V
OCL
5.5 V
Outputcurrent（peak）I
OUT
peak 1.5 A
Outputcurrent（ave）I
OUT
ave 1.2 A
MainMOSFETinputvoltage VDD 60 V
Powerdissipationmax
※1
PD 2.5 W
Operatingtemperature Ta
-
ope −30to85 ℃
Storagetemperature Tstg −40to150 ℃
℃
℃/W
℃/W
Input/OutputRatings
Item Symbol
Recommendation
Units
Junctiontemperature Tj −30to125 ℃
Inputvoltage（Ta＝−10℃to85℃）
V
i
※3
8to57 V
Inputvoltage（Ta＝−30℃to−10℃）
V
i
※3
8.5to57 V
Outputvoltagesettingrange V
O
※4
2.5to12 V
IS/S
Vamp
T
＿
TSD
Drain-sourcebreakdownvoltage
HighSideMOSFET
LowSideSBD
ControlIC
Zerogatevoltagedraincurrent
Staticdrain-sourceon-stateresistance
Source-draindiodeforwardvoltage
Maximumreversevoltage
Forwardvoltage
Reversecurrent
Undervoltagelockoutthreshold(start)
Undervoltagelockoutthreshold(stop)
Undervoltagelockouthysteresis
Supplyｃurrent
Item Symbol Condition MIN TYP MAX Units
VDSS
＿
Ｈ
IDSS
＿
Ｈ
RON
＿
Ｈ
VSD
＿
Ｈ
VRM
VF
IR
Vcc
＿
start
Vcc
＿
stop
Vcc
＿
hys
Icc
Icc
＿
off
VRC
＿
on
VRC
＿
off
IRC
Vboot
Vref
ID＝1mA,VGS＝0V
VDS＝60V,VGS＝0V
ID＝1.2A,VGS＝4V
IS＝1.2A,VGS＝0V
−
IF＝1.2A
VR＝VRM
−
−
−
−
Vcc＝8to57V
Vcc＝8to57V
Vcc＝8to57V
Vcc＝8to57V
Vcc＝8to57V
Vcc＝48V
Vcc＝8to57V
Vcc＝8to57V
−
−
−
−
−
−
−
− −
−
1.5
550
10
−
−
270
−
60
60
6.5
6.0
−
−
−
−0.2
2.5
−
5.4
4.75
7.2
6.7
0.5
12
1.2
−
−
−
6.5
5
0.58
2.5
7.9
7.4
−
15
1.5
0.45
5.3
250
7.6
5.25
μA
mΩ
V
V
V
V
mA
V
V
V
mA
mA
V
V
μA
V
V
fosc Vcc＝48V 212.5 250 287.5 kHz
Vth
＿
OCL
Vcc＝48V
Vcc＝48V
0.162
−20
2.4
−
0.19
−12.5
2.45
150
0.218
−5
2.5
−
V
μA
V
℃
Bootstrapvoltage
Referencevoltage
InitialFrequency1accuracy
Thresholdofovercurrentlimit
Softstartsourcecurrent
Errorampreferencevoltage
Thermalshutdowntemperature
Supplycurrent-remoteOFFstate
RemotecontrolONinputvoltage
RemotecontrolOFFinputvoltage
Remotecontrolsourcecurrent
MD1622N
※1 Glass-EpoxyBoard：56×39
mm
2，Thickness：1
mm
，CopperPatternRate：87.1％（TopSide），82.1％（BottomSide），Thosewiththrough-hole.
※2 Themeasurementresultinthecenterofcase.
※3 Inputvoltageatthetimeofpowersupplyoperation. ※4 Outputvoltageatthetimeofpowersupplyoperation.
Absolute Maximum Ratings Unless otherwise specified : Ta=25ºC
Recommended Operating Conditions
Electrical Characteristics Unless otherwise specified : Ta=25ºC