BU90002GWZ
Datasheet
Single-chip Type with Built-in FET Switching Regulator Series
Step-down Switching regulators
with Built-in Power MOSFET
BU9000xGWZ series
●General Description
●Applications
The BU9000xGWZ are a high efficiency 6MHz
synchronous step-down switching regulator with ultra
low current PFM mode.
Smart phones, Cell phones, Portable applications and
Micro DC/DC modules, USB accessories
It provides up to 1.0A load current and an input voltage
range from 3.0V to 5.5V, optimized for battery powered
portable applications.
●Package(s)
UCSP35L1
W(Typ.) x D(Typ.) x H(Max.)
1.30mm x 0.90mm x 0.40mm
BU9000xGWZ has a mode control pin that allows the
user to select Forced PWM(Pulse Width
Modulation)mode or PFM(Pulse Frequency Modulation)
and PWM auto change mode utilized power save
operation at light load current.
●Typical Application Circuit(s)
●Features
¢ Fast transient response
¢ Automatic PFM/PWM operation
¢ Forced PWM operation
¢ Internal Soft Start
¢ Under voltage lockout
¢ Over current protection
¢ Thermal shutdown
Figure 1. Typical Application Circuit(s)
●Lineup
Operating mode
Output
voltage
Part No.
Input voltage
Switching frequency
MODE=L
MODE=H
BU90002GWZ
BU90003GWZ
BU90004GWZ
BU90005GWZ
BU90006GWZ
BU90007GWZ
3.30V
1.20V
1.80V
2.50V
3.00V
1.25V
4.0V to 5.5V
2.3V to 5.5V
2.3V to 5.5V
2.3V to 5.5V
2.3V to 5.5V
2.3V to 5.5V
5.4MHz to 6.6MHz
3.6MHz to 4.4MHz
4.8MHz to 6.0MHz
5.4MHz to 6.6MHz
5.4MHz to 6.6MHz
3.6MHz to 4.4MHz
Automatic
PFM/PWM
Forced PWM
Forced PFM
Automatic
PFM/PWM
●Pin Configuration(s)
●Pin Description(s)
(BOTTOM VIEW)
Pin No.
Symbol
Function
A1
A2
A3
B1
B2
B3
VIN
EN
Power supply input pin
Enable pin
B1
B2
B3
FB
MODE
LX
GND
MODE
LX
GND pin
A1
VIN
A2
EN
A3
GND
Forced PWM mode pin
Inductor connection pin
Feedback voltage input pin
FB
Figure 2. Pin Configuration(s)
○Product structure:Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
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TSZ22111・14・001
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04.Jul.2012 Rev.001