# BU90003GWZ-E2 - ROHM Semiconductor DC DC Switching Regulator

## Product Summary

The ROHM Semiconductor BU90003GWZ-E2 is a synchronous buck DC/DC converter. It provides a fixed 1.2V output at up to 1A current.

## Product Information

| Field | Value |
| --- | --- |
| Part Number | BU90003GWZ-E2 |
| Manufacturer | ROHM Semiconductor |
| Product Type | DC DC Switching Regulator |
| Category | Power Management (PMIC) |
| Subcategory | Buck Converter |
| Package | 6-WLCSP |
| Supplier Device Package | 6-WLCSP |
| Mounting Type | Surface Mount |

## Description

The ROHM Semiconductor BU90003GWZ-E2 is a synchronous buck DC/DC converter designed for efficient power management in portable applications. This device features an integrated FET design, offering a compact solution for space-constrained designs.

Key electrical specifications include a fixed output voltage of 1.2V and a maximum output current of 1A. The converter operates with an input voltage range from 2.3V to 5.5V and a switching frequency of 4MHz, enabling the use of smaller external components. Protection features such as Under Voltage Lock Out (UVLO), Thermal Shutdown (TSD), and Over Current Protection (OCP) are integrated for enhanced reliability.

An Enable (EN) pin allows for simple ON/OFF control to minimize standby current, while a MODE pin facilitates selection between fixed PWM operation and automatic PFM/PWM switching for improved light-load efficiency. The BU90003GWZ-E2 is supplied in a 6-WLCSP package, suitable for surface mounting.

Applications for this converter include smartphones, portable devices, compact DC/DC modules, and USB accessories where efficient and stable voltage regulation is required.

## Key Specifications

| Specification | Value |
| --- | --- |
| Current | 1 A |
| Frequency | 4 MHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature | -40 °C to 85 °C |
| Output Configuration | Positive |
| Output Current | 1 A |
| Output Type | Fixed |
| Output Voltage | 1.2 V |
| Supplier Device Package | 6-WLCSP |
| Supplier Package | 6-WLCSP |
| Synchronous Rectifier | Yes |
| Topology | Buck |
| Voltage | 2.3 V |

## Availability and Pricing

| Field | Value |
| --- | --- |
| Stock Status | In Stock |
| Distributor Count | 2 |
| Total Stock | 2,147 |
| Price | $0.16 |
| Pricing Available | Yes |

## Estimated Pricing

| Quantity | Price Range |
| ---: | ---: |
| 1+ | $0.16 |

Estimated pricing is for guidance only and is not a live distributor offer.

## Distributor Offers

| Distributor | Stock | Unit Price | MOQ | Lead Time | Last Updated |
| --- | --- | --- | --- | --- | --- |
| Smaxon Electronics | 2,127 |  |  |  |  |
| PROSOFT ELECTRONICS | 20 |  |  |  |  |

## Features

- Synchronous buck DC/DC converter.
- Fixed 1.2V output voltage.
- 1A maximum output current.
- 2.3V to 5.5V input voltage range.
- 6-WLCSP surface mount package.

## Applications

- Ideal for smartphone power.
- Suitable for portable devices.
- Used in compact DC/DC modules.
- Applicable for USB accessories.

## Compliance

| Field | Value |
| --- | --- |
| RoHS Status | RoHS3 Compliant |
| REACH Status | REACH Unaffected |
| Moisture Sensitivity Level | 1 Unlimited |

## Documents and Media

- Datasheet: https://static.distyparts.com/disty-files/datasheets/57/f4/b9/bu90003gwzevk-101-e.pdf
- Image: https://static.distyparts.com/disty-files/images/BU/90/00/BU90002GWZ-E2DKR-ND.jpg
- Product Page: https://distyparts.com/product/bu90003gwz-e2
- RFQ URL: https://distyparts.com/product/bu90003gwz-e2#rfq

## FAQs

### What is the input voltage range of the BU90003GWZ-E2?

2.3V to 5.5V

### What is the output voltage of this regulator?

1.2V

### What is the maximum output current?

1A

### What is the switching frequency of the BU90003GWZ-E2?

3.6 MHz to 4.4 MHz

### What package type is this device available in?

6-WLCSP

### What is the operating temperature range?

-40°C to 85°C (TA)

### What is the mounting type for the BU90003GWZ-E2?

Surface Mount

## Related Pages

- Manufacturer: https://distyparts.com/manufacturer/rohm-semiconductor
- Category: https://distyparts.com/category/integrated-circuits-ics/power-management-pmic/voltage-regulators-dc-dc-switching-regulators
- Product Page: https://distyparts.com/product/bu90003gwz-e2
- Markdown File: https://distyparts.com/product/bu90003gwz-e2.md
- TXT File: https://distyparts.com/product/bu90003gwz-e2.txt