The BU90004GWZ-E2-EVK-101 board has been specifically developed to evaluate the BU90004GWZ synchronous buck DC/DC converter with integrated 250mΩ high-side Pch and 220mΩ low-side Nch MOSFETs.
Features include an input voltage range of 2.3V to 5.5V, 1.8V output, and a switching frequency range of 4.8MHz to 6.0MHz. Multiple protection functions are also built in, including a soft start circuit that prevents inrush current during startup, UVLO (Under Voltage Lock Out), TSD (Thermal Shutdown), and OCP (Over Current Protection). An EN pin allows for simple ON/OFF control to reduce standby current consumption, while a MODE pin enables selection between fixed PWM operation or automatic PFM/PWM switching to improve efficiency during light loads.
The BU9000xGWZ series of compact, high-efficiency step-down switching regulators features high-frequency (6MHz) operation and supports a maximum output current of 1.0A (VIN=3.0 to 5.5V), making them ideal for battery-driven portable devices. In addition, automatic PWM/PFM mode and forced PWM mode switching is enabled via MODE pin logic. As a result circuit current is minimized during PFM mode, improving efficiency at light loads.
Manufacturer | Rohm Semiconductor |
---|---|
Category | AC/DC and DC/DC Conversion |
Sub-Category | DC/DC SMPS - Single Output |
Eval Board Part Number | BU90004GWZ-E2-EVK-101-ND |
Eval Board Supplier | Rohm Semiconductor |
Eval Board |
Normally In Stock
|
Topology |
Step Down
|
Outputs and Type |
1 Non-Isolated
|
Voltage Out: Factory Set |
1.8 V
|
Current Out |
1 A
|
Voltage In |
2.3 ~ 5.5 V
|
Efficiency @ Conditions |
>84%, 5V in, 1.8V @ 200 ~ 550 mA (FPWM Mode)
>80%, 5V in, 1.8V @ 50 ~ 850 mA (PFM/PWM Mode) |
Voltage Out Range |
- Fixed
|
Features |
Current Limit (Adj. or Fixed)
Light Load Mode Over Current Protection PFM or PWM Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out |
Switching Frequency |
4.8 ~ 6 MHz
|
Standby Current [Typical] |
0 µA
|
Quiescent Current [Typical] |
45 µA
|
Component Count + Extras |
6 + 8
|
Internal Switch |
Yes
|
Design Author |
Rohm
|
Application / Target Market |
Audio: MP3 Players
Cell Phones Portable Devices Tablets Wearable Devices |
Standby Current [Maximum] |
1 µA
|
Quiescent Current [Maximum] |
65 µA
|
Main I.C. Base Part |
BU90004
|
Date Created By Author | 2015-12 |
Date Added To Library | 2021-07 |