XB1117P331FR

更新时间： 2024-02-09 11:14:27

品牌	Logo	应用领域
特瑞仕 - TOREX		稳压器电源电路
页数	文件大小	规格书
10页	450K
描述
1A Low Dropout Positive Voltage Regulator

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XB1117P331FR 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	, SOT-223	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.82	可调性：	FIXED
标称回动电压 1：	1.3 V	最大绝对输入电压：	7 V
JESD-609代码：	e3	最大电网调整率：	0.0045%
最大负载调整率：	0.0134%	湿度敏感等级：	1
输出次数：	1	端子数量：	3
工作温度TJ-Max：	125 °C	工作温度TJ-Min：
最大输出电流 1：	1 A	标称输出电压 1：	3.3 V
封装主体材料：	PLASTIC/EPOXY	封装等效代码：	SOT-223
包装方法：	TAPE AND REEL	认证状态：	Not Qualified
调节器类型：	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR	子类别：	Other Regulators
表面贴装：	YES	技术：	BIPOLAR
端子面层：	Matte Tin (Sn)	最大电压容差：	2%
Base Number Matches：	1

XB1117P331FR 数据手册

XB1117

Series

■OPERATIONAL EXPLANATION

1. Output voltage adjustment

The XB1117 series provides a stable output by comparing the output voltage to an internal reference voltage. With the

adjustable XB1117K type, a 1.25V reference voltage (VREF) is set between the VOUT pin and the ADJ pin and the external

resistors R1 and R2 are used to set the output voltage. The resistance values of R1 and R2 should be set so as to provide a

minimum load current of 10mA. The output voltage is given by the following equation.

VOUT=VREF(1+R2/R1)+IADJ x R2

The output voltage of the XB1117P type is internally fixed to 1.8V, 2.5V, 3.3V, and 5.0V so external resistors are not

necessary.

2. Stability and load regulation

The XB1117 series requires a load capacitor between the VOUT pin and the GND pin to provide phase compensation thereby

ensuring stability of the output voltage. Either a tantalum capacitor of more than 10μF (TYP.) or an aluminum electrolytic

capacitor of more than 50μF (TYP.) should be connected.

(Note : The capacitor's ESR value should not exceed 0.5Ω.)

The output capacitor does not have a theoretical upper limit so increasing its value will increase stability. CL=100μF or

more is typical for high current regulator design.

In order to avoid any reductions in output voltage accuracy with the XB1117K type, we recommend that you do not place a

parasitic resistor (Rp) between the VOUT pin and the divider resistor R1. The parasitic resistor (Rp) does not influence the

output however if the divider resistor R1 is directly connected to the VOUT pin.

With the XB1117P type, although external resistor (R1) is internally connected to the VOUT pin, stability can be maintained by

not wiring a parasitic resistor to the GND pin.

3. Thermal protection

XB1117 series has themal protection which limits junction temperature to 150℃. However,device functionally is only

guaranteed to a maximum junction temperture of + 125℃. The power disspation and junction temperture for XB1117 in DPAK

package are given by

PD=(VIN-VOUT)×IOUT

TJUNCTION=T AMBIENT+（PD×θJA）

NOTE：T JUNCTION must not exceed 125℃.

1...4 5 678 9 10

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