BU90002GWZ_11 Datasheet, PDF (1/14 Pages) Rohm – Output 1.0A High-efficiency Step-down Switching regulators with Built-in Power MOSFET

Single-chip Type with Built-in FET Switching Regulator Series
Output 1.0A High-efficiency
Step-down Switching regulators with
Built-in Power MOSFET
BU90002GWZ, BU90003GWZ, BU90004GWZ, BU90005GWZ, BU90006GWZ,
No.11xxxEATxx
●Description
The BU9000XGWZ are a high efficiency 6MHz synchronous step-down switching regulator with ultra low current PFM
mode.
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.
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.
●Features
1) 93% peak efficiency
2) 4 to 6 MHz switching frequency
3) Input voltage VIN=2.3V to 5.5V(BU90003～BU90006), VIN=4.0V to 5.5V (BU90002)
4) 45uA typical quiescent current
5) Fast transient response
6) Automatic PFM/PWM operation
7) Forced PWM operation
8) Internal Soft Start
9) Under voltage lockout
10) Over current protection
11) Thermal shutdown
12) Ultra small and low profile WLCSP (1.3mm×0.9mm t=0.40mm MAX) (UCSP35L1 )
●Applications
Cell phones, Smart phones, Portable applications and Micro DC/DC modules, USB accessories
●Operating range
Part No.
BU90002GWZ
BU90003GWZ
BU90004GWZ
BU90005GWZ
BU90006GWZ
Output voltage
3.30V
1.20V
1.80V
2.50V
3.00V
Input voltage
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
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1/14
Target spec. ver.1.7