BD9123MUV_11 Datasheet, PDF (2/18 Pages) Rohm – Output 1.5A or Less High-efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD9123MUV
Technical Note
●Operating Conditions (Ta=-40～+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
VCC
PVCC
Ratings
Unit
Min.
Typ.
Max.
2.7
3.3
5.5
V
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
FOSC
0.8
1
1.2
MHz
Pch FET ON resistance
RONP
-
0.35
0.60
Ω PVCC=5V
Nch FET ON resistance
RONN
-
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
ITHSO
25
50
-
µA VOUT =0.8V
UVLO threshold voltage
VUVLO1
2.4
2.5
2.6
V VCC=5V→0V
UVLO release voltage
VUVLO2
2.425
2.55
2.7
V VCC=0V→5V
Power Good Threshold
VPGOOD1
70
75
80
% VOUT→0V
Power Good Release
VPGOOD2
85
90
95
% 0V→VOUT
Power Good Delay
TPG
2.5
5
10
ms
PGOOD ON Resistance
RONPG
-
140
280
Ω
Soft start time
TSS
0.4
0.8
1.6
ms
Timer latch time
TLATCH
1
2
4
ms
Output Short circuit threshold Voltage
VSCP
-
VOUT×0.5 VOUT×0.7 V VOUT→0V
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2011.01 - Rev.A