- 您现在的位置：买卖IC网 > PDF目录1773 > A4491EESTR-T (Allegro Microsystems Inc)IC REG BUCK ADJ 2.2A TRPL 20QFN PDF资料下载
参数资料
| 型号： | A4491EESTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2.2A TRPL 20QFN |
| 标准包装： | 9,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 3 |
| 输出电压： | 可调至 0.8V |
| 输入电压： | 4.5 V ~ 23 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 550kHz |
| 电流 - 输出： | 2.2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-QFN（4x4） |
A4491
Description (continued)
Triple Output Step-Down Switching Regulator
The POR flag also indicates when the input voltage drops below
specification, giving the system controller advance warning while
the switchers continue to operate down to the shutdown level.
Internal diagnostics provide comprehensive protection against
overloads, input undervoltages, and overtemperatures.
Output current capability is ≈ 4.5A total for all 3 outputs, depending
on the combinations of V IN and each V OUT level.
The A4491 is provided in a 20-contact, 4 mm × 4 mm, 0.75 mm
nominal overall height QFN, with exposed pad for enhanced
thermal dissipation. It is lead (Pb) free, with 100% matte tin
leadframe plating.
Selection Guide
Part Number
A4491EESTR-T
Packing
1500 pieces per 7-in. reel
Operating Temperature Range
(°C)
–40 to 85
Absolute Maximum Ratings ( reference to GND)
Characteristic
Load Supply Voltage
LX1, LX2, and LX3 Pins
PORZ and VDD Pins
ENBx Pin Input Current
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
V BB
V LX n
V IN
I ENBx
T A
T J (max)
T stg
Notes
Driven by a current-limited voltage source
Range E
Rating
24
–1 to 24
–0.3 to 7
1
–40 to 85
150
–55 to 150
Units
V
V
V
mA
oC
oC
oC
Recommended Operating Conditions
Characteristic
Load Supply Voltage
LX1, LX2, and LX3 Pins
Operating Ambient Temperature
Junction Temperature
Symbol
V BB
V LX n
T A
T J
Conditions
To operate at V BB < 6 V, connect V DD
supply to the V BB supply. See Powering
Configurations section.
Min.
4.5
–0.7
–40
–40
Typ.
–
–
–
–
Max.
23
23
85
125
Units
V
V
oC
oC
Thermal Characteristics may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
Value Units
Package Thermal Resistance
R θ JA
On 4-layer PCB based on JEDEC standard
37
oC/W
*Additional thermal information available on the Allegro website.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
相关PDF资料 |
PDF描述 |
|---|---|
| A4931MET-T | IC DC MOTOR PREDRIVER 3PH 28QFN |
| A4934GLPTR-T | IC BLDC DVR 3PHASE 16-ETSSOP |
| A4936METTR-T | IC DC MOTOR PREDRIVER 3PH 32QFN |
| A4938EETTR-T | IC DC MOTOR PREDRIVER 3PH 28-QFN |
| A4941GLPTR-T | IC MOTOR DRIVER 3PH 16-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A4492 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Designed to provide the power supply requirements for automotive applications, the A4492 provides three high current, high performance, switching regulator outputs with independent soft start. |
| A4492EESTR-T | 功能描述:IC REG SW STEPDOWN TRPL 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| A4496T1T | 制造商:Pentair Technical Products / Hoffman 功能描述:4X4, 96 LONG TYPE 1 TROUGH Gray, 4.00x4.00x96.00, Steel |
| A44A | 制造商:RIVETS 功能描述: |
| A44CCOL | 制造商:HOFFMAN ENCLOSURES 功能描述:ENCLOSURE;STRAIGHT PEDESTAL COLUMN FOR CONSOLET;35.00X4.00X4.00;STEEL;GRAY 制造商:HOFFMAN ENCLOSURES 功能描述:CONSOLETS PEDESTAL COLUMN 制造商:Pentair Technical Products / Hoffman 功能描述:CONSOLETS PEDESTAL COLUMN; Accessory Type:Straight Pedestal Column; For Use With:Consolet enclosures, 18 x 18 in pedestal base; Body Color:Grey; Enclosure Material:Steel; External Body Height:35"; External Height:35" ;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。