BD9123MUV_12 Datasheet, PDF (3/22 Pages) Rohm – 2.7V to 5.5V, 1.2A 1ch Synchronous Buck Converter integrated FET

BD9123MUV
Datasheet
●Absolute Maximum Ratings (Ta=25℃)
Parameter
VCC Voltage
PVCC Voltage
Symbol
Vcc
PVcc
Ratings
Unit
-0.3 to +7 *¹
V
-0.3 to +7 *¹
V
EN,SW,ITH Voltage
EN, SW, ITH
-0.3 to +7
V
Logic input voltage
Power Dissipation 1
Power Dissipation 2
Power Dissipation 3
Power Dissipation 4
VID<2:0>
-0.3 to +7
V
Pd1
0.27 *²
W
Pd2
0.62 *³
W
Pd3
1.77 *⁴
W
Pd4
2.66 *⁵
W
Operating temperature range
Topr
-40 to +95
℃
Storage temperature range
Tstg
-55 to +150
℃
Maximum junction temperature
Tj
+150
℃
*1 Pd should not be exceeded.
*2 IC only
*3 1-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, occupied area by copper foil : 10.29mm²
*4 4-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, 1^st and 4^th copper foil area : 10.29mm² , 2^nd and 3^rd copper foil area : 5505mm²
*5 4-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, occupied area by copper foil : 5505mm², in each layers
●Operating Ratings (Ta=-40 to +95℃)
Parameter
Power Supply Voltage
EN Voltage
Logic input voltage
Output voltage Setting Range
SW average output current
*6 Pd should not be exceeded.
Symbol
Ratings
Unit
Min.
Typ.
Max.
VCC
2.7
3.3
5.5
V
PVCC
2.7
3.3
5.5
V
VEN
0
-
Vcc
V
VID<2:0>
0
-
5.5
V
VOUT
0.85
-
1.2
V
ISW
-
-
1.2^*6
A
●Electrical Characteristics (Ta=25℃ VCC=PVCC=5V, EN=VCC, VID<2>=VID<1>=VID<0>= 0V), unless otherwise specified.)
Parameter
Limits
Symbol
Unit
Min.
Typ.
Max.
Conditions
Standby current
ISTB
-
0
10
µA EN=GND
Active current
ICC
-
300
500
µA
EN Low voltage
VENL
-
GND
0.8
V Standby mode
EN High voltage
VENH
2.0
VCC
-
V Active mode
EN input current
IEN
-
5
10
µA VEN=5V
VID Low voltage
VVIDL
-
GND
0.8
V
VID High voltage
VVIDH
2.0
VCC
-
V
VID input current
IVID
-
5
10
µA VVID=5V
Oscillation frequency
Pch FET ON resistance
Nch FET ON resistance
FOSC
RONP
RONN
0.8
1
1.2
MHz
-
0.35
0.60
Ω PVCC=5V
-
0.25
0.50
Ω PVCC=5V
Output voltage
VOUT
0.98
1.0
1.02
V VID<2:0>=(0,0,0)
ITH SInk current
ITHSI
25
50
-
µA VOUT =1.2V
ITH Source Current
UVLO threshold voltage
UVLO release voltage
Power Good Threshold
Power Good Release
ITHSO
25
50
-
µA VOUT =0.8V
VUVLO1
2.4
2.5
2.6
V VCC=5V→0V
VUVLO2
2.425
2.55
2.7
V VCC=0V→5V
VPGOOD1
70
75
80
% VOUT→0V
VPGOOD2
85
90
95
% 0V→VOUT
Power Good Delay
PGOOD ON Resistance
TPG
2.5
5
10
ms
RONPG
-
140
280
Ω
Soft start time
TSS
0.4
0.8
1.6
ms
Timer latch time
Output Short circuit threshold Voltage
TLATCH
VSCP
1
2
4
ms
-
VOUT×0.5 VOUT×0.7 V VOUT→0V
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TSZ02201-0J3J0AJ00120-1-2
02.MAR.2012 Rev.001