Datasheet > AAP2967-25VIR1

AAP2967-25VIR1

更新时间： 2024-02-21 13:55:53

品牌	Logo	应用领域
德信 - EUTECH		光电二极管输出元件调节器
页数	文件大小	规格书
9页	351K
描述
Fixed Positive LDO Regulator, 2.5V, 0.2V Dropout, PDSO5, ROHS COMPLIANT, SOT23, 5 PIN

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AAP2967-25VIR1 技术参数

是否Rohs认证：	符合	生命周期：	Contact Manufacturer
包装说明：	ROHS COMPLIANT, SOT23, 5 PIN	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.67	最大回动电压 1：	0.2 V
最大输入电压：	5.5 V	最小输入电压：	2.5 V
JESD-30 代码：	R-PDSO-G5	长度：	2.9 mm
功能数量：	1	端子数量：	5
工作温度TJ-Max：	125 °C	工作温度TJ-Min：	-40 °C
最大输出电流 1：	0.3 A	最大输出电压 1：	2.575 V
最小输出电压 1：	2.425 V	标称输出电压 1：	2.5 V
封装主体材料：	PLASTIC/EPOXY	封装代码：	LSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	NOT SPECIFIED	调节器类型：	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度：	1.45 mm	表面贴装：	YES
端子形式：	GULL WING	端子节距：	0.95 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	1.6 mm	Base Number Matches：	1

AAP2967-25VIR1 数据手册

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AAP2967

Application Information

Noise Bypass Capacitor

External Capacitors

An external 10nF bypass capacitor at BP pin conjunction

with an internal resistor creates lowpass filter. Increasing

the capacitance will decrease the output noise. This cap is

connected directly to a high impedance node in the

bandgap reference circuit. Any significant loading on this

node will cause a change on the regulated output voltage.

For this reason, DC leakage current through this pin must

be kept as low as possible for best output voltage

accuracy. The types of capacitors best suited for the noise

bypass capacitor are ceramic and film.

Unlike many other LDO’s , addition of a noise reduction

capacitor does not effect the load transient response of

the device. However, it does affect start-up time. The

smaller the capacitance value, the quicker the start-up

time.

Like any low-dropout regulator, the AAP2967 requires

external capacitors for regulator stability. The AAP2967

is specifically designed for portable applications

requiring minimum board space and smallest components.

These capacitors must be correctly selected for good

performance.

Input Capacitor

A minimum input capacitance of 1µF is required between

the AAP2967 input pin and ground (the amount of the

capacitance may be increased without limit).This

capacitor must be located a distance of not more than

1cm from the input pin and returned to a clean analog

ground.

Any good quality ceramic, tantalum, or film capacitor

may be used at the input. If a tantalum capacitor is used

at the input, it must be guaranteed by the manufacturer to

have asurge current rating sufficient for the application.

Power Dissipation and Junction Temperature

Specified regulator operation is assured to a junction

temperature of 125°C; the maximum junction

temperature should be restricted to 125°C under normal

operating conditions. This restriction limits the power

dissipation the regulator can handle in any given

application. To ensure the junction temperature is within

acceptable limits, calculate the maximum allowable

dissipation, P_D(max), and the actual dissipation, P_D, which

must be less than or equal to P_D(max)

No-Load Stability

The AAP2967 will remain stable and in regulation with

no external load. This is specially important in CMOS

RAM keep-alive applications.

Output Capacitance

The maximum-power-dissipation limit is determined

using the following equation:

The AAP2967 is specifically designed to employ ceramic

output capacitors as low as 2.2µF. Ceramic capacitors

below 10µF offer significant cost and space savings,

along with high frequency noise filtering. Higher values

and other types and of capacitor may be used, but their

equivalent series resistance (ESR) should be maintained

below 0.5Ω. Ceramic capacitor of the value required by

the AAP2967 are available in the following dielectric

types: Z5U, Y5V, X5R, and X7R. The Z5U and Y5V

types exhibit a 50% or more drop in capacitance value as

their temperature increase from 25°C, an important

consideration. The X5R generally maintain their

capacitance value within ± 20%. The X7R type are

desirable for their tighter tolerance of 10% over

temperature.

T max − T

D(max)

θJA

Where:

_JMAXis the maximum allowable junction temperature.

_θJAis the thermal resistance junction-to-ambient for the

package

T_Ais the ambient temperature.

The regulator dissipation is calculated using:

(

V − V

)

×I

Power dissipation resulting from quiescent current is

negligible. Excessive power dissipation triggers the

thermal protection circuit.

Shutdown

The AAP2967 goes into sleep mode when the

SHDN

pin is in a logic low condition. During this condition, the

pass transistor, error amplifier, and bandgap are turned

off, reducing the supply current to 60nA typical. The

pin may be directly tied to V_INto keep the part

SHDN

on.

DS2967 Ver 1.0 Dec. 2007

1...4 5 678 9

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