BU90002GWZ Datasheet, PDF (4/24 Pages) Rohm – Step-down Switching regulators with Built-in Power MOSFET

BU9000xGWZ series
Datasheet
●Electrical Characteristic(s) (unless otherwise specified VIN=5.0V, Ta=25℃)
Item
【Switching regulator】
Output voltage accuracy
Maximum load current
【Soft start】
Soft start time
【Frequency control】
Symbol
Min.
-2
VOUTA
-2
IoutMAX1
-
IoutMAX2
-
IoutMAX3
-
IoutMAX4
-
Rating
Typ.
-
-
-
-
-
-
Max.
+2
+3
1.0
0.8
0.6
0.1
Tss
65
120
240
5.4
6.0
6.6
Switching frequency
fosc
4.8
5.4
6.0
3.6
4.0
4.4
【Driver】
PchFET on resistance
NchFET on resistance
【Control】
RonP1
-
RonP2
RonN1
-
RonN2
250
400
300
450
220
350
250
380
EN pin control ^Operation
VENH
1.4
-
VIN
voltage
Non Operation VENL
0
-
0.4
MODE pin ^Operation
VMODEH
1.4
-
VIN
control voltage _{Non Operation VMODEL}
0
-
0.4
【UVLO】
Protect threshold voltage
Hysteresis
【Current limit】
Uvth
Uvhy
1.95
2.05
2.15
50
100
150
Current limit threshold
ILIMIT
1.5
1.7
1.9
【Output discharge】
Output discharge resistance
【Circuit current】
DRES
55
110
220
Operating quiescent current
Shutdown current
IINS1
-
45
65
IINS2
-
55
80
SHD
-
0
1
Unit
Condition
MODE:H(PWM Operation)
%
MODE:L(PFM Operation)
A 3.0V≦VIN＜5.5V
A 2.7V≦VIN＜3.0V
A 2.3V≦VIN＜2.7V
A
MODE:L(PFM Operation)
(BU90005GWZ,)
usec
MHz
MHz
MHz
No load, MODE:H
(BU90002GWZ,BU90005GWZ,
BU90006GWZ)
No load, MODE:H
(BU90004GWZ)
No load, MODE:H
(BU90003GWZ)
mOhm
mOhm
mOhm
mOhm
VIN=5.0V
VIN=3.6V
VIN=5.0V
VIN=3.6V
V
V
V Forced PWM
V ^{Automatic PFM/PWM}
(BU90005GWZ:Forced PFM)
V
mV
A
PMOS current detect,
Open loop
Ohm EN=0V
EN:H, MODE:L,
VOUT=3.6V forced
uA _{Not switching}
(BU90003GWZ,BU90004GWZ,
BU90005GWZ,BU90007GWZ)
EN:H, MODE:L,
uA ^{VOUT=3.6V forced}
Not switching
(BU90002GWZ,BU90006GWZ)
uA EN=0V
www.rohm.co
m© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/21
TSZ02201-0F2F0AG00010-1-2
04.Jul.2012 Rev.001