Datasheet > STBB3J

STBB3J

更新时间： 2024-12-01 14:58:15

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		DC-DC转换器
页数	文件大小	规格书
26页	2118K
描述
2A，2MHz，高效双模降压-升压DC-DC转换器

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STBB3J 数据手册

STBB3J

2 A, high efficiency single inductor

buck-boost DC-DC converter

Datasheet

- production data

Applications

•

Single cell Li-Ion, two-cell and three-cell

alkaline, Ni-MH powered devices

•

Memory card supply

Tablet, smartphones

Digital cameras

Flip Chip 20, pitch = 0.4 mm

Description

The STBB3J is a fixed frequency, high efficiency,

buck-boost DC-DC converter which provides

output voltages from 1.2 V to 5.5 V starting from

input voltage from 1.8 V to 5.5 V. The device can

operate with input voltages higher than, equal to,

or lower than the output voltage making the

product suitable for cell lithium-Ion applications

where the output voltage is within the battery

voltage range. The low-R_DS(on)N-channel and P-

channel MOSFET switches are integrated and

contribute to achieve high efficiency. The MODE

pin allows the selection between auto mode and

forced PWM mode, taking advantage from either

lower power consumption or best dynamic

performance.The device also includes soft-start

control, thermal shutdown, and current limit. The

STBB3J is packaged in Flip Chip 20 bumps with

2.5 x 1.75 mm.

Features

•

Input voltage range from 1.8 V to 5.5 V

2 A output current at 3.3 V in buck mode

(V_IN= 3.6 V to 5.5 V)

•

800 mA output current at 3.3 V in boost mode

(V_IN2.0 V)

•

Typical efficiency higher than 94%

2% DC feedback voltage tolerance

Automatic transition between step-down and

boost mode

•

Adjustable output voltage from 1.2 V to 5.5 V

Power save mode (PS) at light load

2.0 MHz fixed switching frequency

Adjustable switching frequency up to 2.4 MHz

(by external synchronous square signal)

•

Device quiescent current less than 50 µA

Load disconnect during shutdown

Shutdown function and soft-start

Shutdown current < 1 µA

Available in Flip Chip 20, pitch = 0.4 mm

Table 1. Device summary

Order code

Part number

Marking

Packing

Output voltage

STBB3JR

STBB3J

BB3

Flip Chip 20

Adjustable

December 2021

DocID025263 Rev 8

1/26

This is information on a product in full production.

www.st.com

12 3 4 5 6 7...26

中文翻译

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