This evaluation board has been developed specifically developed to evaluate the BU90003GWZ 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, 1.2V output, and a switching frequency range of 3.6MHz to 4.4MHz. 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.
Manufacturer | Rohm Semiconductor |
---|---|
Category | AC/DC and DC/DC Conversion |
Sub-Category | DC/DC SMPS - Single Output |
Eval Board Part Number | BU90003GWZ-E2-EVK-101-ND |
Eval Board Supplier | Rohm Semiconductor |
Eval Board |
Board not Stocked
|
Topology |
Step Down
|
Outputs and Type |
1 Non-Isolated
|
Voltage Out: Factory Set |
1.2 V
|
Current Out |
1 A
|
Voltage In |
2.3 ~ 5.5 V
|
Efficiency @ Conditions |
>75%, 5V in, 1.2V @ 25 ~ 800 mA
|
Voltage Out Range |
- Fixed
|
Features |
Light Load Mode
Over Current Protection PFM or PWM Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out |
Switching Frequency |
3.6 ~ 4.4 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 |
Portable Devices
USB Powered Devices |
Standby Current [Maximum] |
1 µA
|
Quiescent Current [Maximum] |
65 µA
|
Main I.C. Base Part |
BU90003
|
Date Created By Author | 2015-12 |
Date Added To Library | 2019-03 |