BU90002GWZ_11 Datasheet, PDF (9/14 Pages) Rohm – Output 1.0A High-efficiency Step-down Switching regulators with Built-in Power MOSFET

BU90002GWZ, BU90003GWZ, BU90004GWZ, BU90005GWZ, BU90006GWZ
●Block diagram /Application circuit
Technical Note
FB
VOUT B3
TSD
MODE
L ：　PWM/PFM MODE
H ：　PWM MODE
B1
UVLO
PWM/PFM
control
VIN
A1
EN
2.3～5.5V
-
+
ERROR COMP
Switching
Control Logic
and
Gate Driver
VREF
1.5～0.47uH
B2
VOUT
LX
4.7uF
EN
H ：　ON _A2
L ：　OFF
SHUTDOWN
Frequency
control
GND
A3
●External dimensions
●Pin layout (BOTTOM VIEW)
B1
B2
MODE
LX
A1
A2
VIN
EN
B3
FB
A3
GND
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●Pin number/Name/Functions
Pin No.
A1
A2
A3
B1
B2
B3
Name
VIN
EN
GND
MODE
LX
FB
Function
Power supply input pin
Enable pin
GND pin
Forced PWM mode pin
Inductor connection pin
Feedback voltage input pin
9/14
Target spec. ver.1.7