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A8450KLB PDF预览

A8450KLB

更新时间： 2024-11-01 22:26:51
品牌 Logo 应用领域
急速微 - ALLEGRO 线性稳压器IC调节器电源电路光电二极管输出元件
页数 文件大小 规格书
15页 547K
描述
Automotive Multioutput Voltage Regulator

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中文翻译

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A8450KLB 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：SOIC包装说明：SOP,
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.7Is Samacsys：N
JESD-30 代码：R-PDSO-G24JESD-609代码：e0
长度：15.4 mm功能数量：1
输出次数：3端子数量：24
工作温度TJ-Max：150 °C最大输出电压 1：3.366 V
最小输出电压 1：3.324 V标称输出电压 1：3.3 V
最大输出电压 2：3.3 V最小输出电压 2：1.2 V
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：240认证状态：Not Qualified
调节器类型：FIXED/ADJUSTABLE POSITIVE MULTIPLE OUTPUT STANDARD REGULATOR座面最大高度：2.65 mm
表面贴装：YES端子面层：TIN LEAD
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：7.5 mmBase Number Matches：1

A8450KLB 数据手册

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A8450  
Automotive Multioutput Voltage Regulator  
The A8450 is a multioutput power supply intended for automotive  
applications. The A8450 operates from a wide input supply range and  
is designed to satisfy the requirements of high ambient temperature  
environments.  
Package LB 24-pin SOIC  
Four regulated voltage outputs provide multiple options. The 3.3 V  
regulator and the 1.2 to 3.3 V adjustable regulator can be used to power  
microcontroller or DSP cores, or for I/O, sensing, and A-to-D conver-  
sion. Two 5 V outputs, one digital and the other analog, feature output  
tracking within 0.5% of each other over the operating temperature  
range. In addition, the analog regulator is protected against short-to-  
battery conditions. All four regulators feature foldback current limit  
protection.  
The device can be enabled or disabled using two input pins. The  
high voltage input, on the ENBAT pin, allows enable/disable using an  
engine ignition or battery switch signal. The logic-level input, on the  
ENB pin, allows enable/disable by microcontroller or DSP signals.  
When disabled, the A8450 draws less than 10 µA of current. A POR  
(power-on-reset) block monitors the supply voltages and provides a  
reset signal, with an adjustable delay, for microcontroller or DSP resets.  
A separate fault pin signals TSD (thermal shutdown), 5 V analog short-  
to-supply, and 5 V analog or digital undervoltage.  
Buck  
Converter  
VBB  
CP2  
1
2
24 LX  
23 ENBAT  
22 V33  
Charge  
Pump  
CP1  
3
VCP  
V33BD  
CL33  
4
21  
20  
19  
18  
17  
16  
15  
VREG11  
GND  
5
Soft  
Start  
3.3 V  
Lin Reg  
Control  
GND  
6
GND  
GND  
7
5 V  
Dig/Anlg  
Lin Reg  
ENB  
VREG  
V5D  
8
CPOR  
CLADJ  
VADJBD  
FB  
9
10  
11  
12  
NFAULT  
1.2 V to  
3.3 V  
Lin Reg  
Control  
14 NPOR  
13  
5 V Reg  
Track  
Control  
V5A  
The A8450 is supplied in a 24-pin SOIC package (part number  
suffix LB) with fused power ground pins for enhanced thermal perfor-  
mance. This provides an RθJA of 35°C/W on a 4-layer board (see chart  
on p.4).  
Approximate Scale 1:1  
FEATURES  
ꢀ6 V to 45 V input range  
ꢀdc-to-dc buck converter with 5.7 V output  
ꢀOvercurrent protection with foldback, and undervoltage lockout (UVLO)  
ꢀDual 5 V outputs  
ABSOLUTE MAXIMUM RATINGS  
– Digital 5 V ±2%, 200 mA  
– Analog 5 V, 200 mA  
– Short-to-supply protection on analog regulator  
– Analog to digital regulator output tracking <0.5%, throughout  
operating temperature range  
ꢀ3.3 V linear regulator, with foldback current limit  
ꢀAdjustable 1.2 V to 3.3 V linear regulator, adjustable foldback current limit  
ꢀIgnition switch enable; Sleep mode  
Load Supply Voltage, VBB ..................................45 V  
Analog Output, Pin V5A........................–1 V to 45 V  
Logic Input Signal  
Pin ENBAT .................................–0.3 V to 45 V  
Pin ENB .....................................–0.3 V to 6.5 V  
Pin LX.................................................... –2 V to VBB  
Operating Temperature Range  
Ambient Temperature, TA............ –40°C to 135°C  
Junction Temperature, TJ(MAX).....................150°C  
Storage Temperature, TS .................... –55°C to 150°C  
ꢀ100% duty cycle operation for low input voltages  
ꢀPower OK output  
ꢀ–40°C to 135°C ambient operating temperature range  
Use the following complete part number when ordering:  
Part Number  
Package  
Description  
A8450KLB  
24-pin, SOIC  
Webbed Leadframe  
A8450KLB-DS, Rev. 1  
1234567...15

中文翻译

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