Datasheet > 电源电路 > 线性稳压器IC> ADP3339AKC-2.85-RL

ADP3339AKC-2.85-RL

更新时间： 2024-01-23 19:40:34

品牌	Logo	应用领域
亚德诺 - ADI		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
12页	252K
描述
High Accuracy, Ultralow IQ, 1.5 A, anyCAP Low Dropout Regulator

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ADP3339AKC-2.85-RL 技术参数

Source Url Status Check Date：	2013-05-01 14:56:46.653	是否无铅：	含铅
是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	TO-261AA	包装说明：	SOP, SOT-223
针数：	3	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.37	Is Samacsys：	N
可调性：	FIXED	最大回动电压 1：	0.48 V
标称回动电压 1：	0.23 V	最大绝对输入电压：	8.5 V
最大输入电压：	6 V	最小输入电压：	3.35 V
JESD-30 代码：	R-PDSO-G3	JESD-609代码：	e0
长度：	6.5 mm	湿度敏感等级：	1
功能数量：	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：	-40 °C	最大输出电流 1：	1.5 A
最大输出电压 1：	2.8927 V	最小输出电压 1：	2.807 V
标称输出电压 1：	2.85 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOT-223
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
包装方法：	TAPE AND REEL	峰值回流温度（摄氏度）：	240
认证状态：	Not Qualified	调节器类型：	FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度：	1.8 mm	子类别：	Other Regulators
表面贴装：	YES	技术：	BIPOLAR
端子面层：	Tin/Lead (Sn85Pb15)	端子形式：	GULL WING
端子节距：	2.3 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	最大电压容差：	1.9%
宽度：	3.5 mm	Base Number Matches：	1

ADP3339AKC-2.85-RL 数据手册

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Data Sheet

ADP3339

THEORY OF OPERATION

The ADP3339 anyCAP LDO uses a single control loop for

regulation and reference functions. The output voltage is sensed

by a resistive voltage divider, consisting of R1 and R2, which is

varied to provide the available output voltage option. Feedback

is taken from this network by way of a series diode (D1) and a

second resistor divider (R3 and R4) to the input of an amplifier.

Most LDOs place very strict requirements on the range of ESR

values for the output capacitor because they are difficult to

stabilize due to the uncertainty of load capacitance and resis-

tance. Moreover, the ESR value required to keep conventional

LDOs stable changes depending on load and temperature.

These ESR limitations make designing with LDOs more

difficult because of their unclear specifications and extreme

variations over temperature.

A very high gain error amplifier is used to control this loop. The

amplifier is constructed in such a way that equilibrium produces a

large, temperature-proportional input offset voltage that is repeata-

ble and very well controlled. The temperature-proportional

offset voltage is combined with the complementary diode volt-

age to form a virtual band gap voltage that is implicit in the

network, although it never appears explicitly in the circuit.

Ultimately, this patented design makes it possible to control the

loop with only one amplifier. This technique also improves the

noise characteristics of the amplifier by providing more flexibil-

ity on the trade-off of noise sources that leads to a low noise design.

With the ADP3339 anyCAP LDO, this is no longer true. The

ADP3339 can be used with virtually any good quality capacitor,

with no constraint on the minimum ESR. This innovative

design allows the circuit to be stable with just a small 1 μF

capacitor on the output. Additional advantages of the pole-

splitting scheme include superior line noise rejection and very

high regulator gain, which lead to excellent line and load

regulation. An impressive 1.5% accuracy is guaranteed over

line, load, and temperature.

The R1/R2 divider is chosen in the same ratio as the band gap

voltage to the output voltage. Although the R1/R2 resistor

divider is loaded by Diode D1 and a second divider consisting

of R3 and R4, the values can be chosen to produce a temperature-

stable output. This unique arrangement specifically corrects for

the loading of the divider, thus avoiding the error resulting from

base current loading in conventional circuits.

Additional features of the circuit include current limit and

thermal shutdown.

OUT

1μF

OUT

GND

ADP3339

The patented amplifier controls a new and unique noninverting

driver that drives the pass transistor, Q1. The use of this special

noninverting driver enables the frequency compensation to

include the load capacitor in a pole-splitting arrangement to

achieve reduced sensitivity to the value, type, and ESR of the

load capacitance.

Figure 20. Typical Application Circuit

INPUT

OUTPUT

COMPENSATION

CAPACITOR

ATTENUATION

(a)

)

BANDGAP OUT

R3 D1

PTAT

LOAD

NONINVERTING

WIDEBAND

DRIVER

PTAT

LOAD

CURRENT

ADP3339

GND

Figure 21. Functional Block Diagram

Rev. C | Page 9 of 12

1...6 7 8910 11 12

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ADP3339AKC-2.85-RL 替代型号

型号	品牌	替代类型	描述	数据表
ADP3339AKCZ-2.5-R7	ADI	完全替代	High Accuracy, Ultralow IQ, 1.5 A, anyCAP Low Dropout Regulator
ADP3339AKCZ-3.3-R7	ADI	类似代替	High Accuracy, Ultralow IQ, 1.5 A, anyCAP Low Dropout Regulator

与ADP3339AKC-2.85-RL相关器件

型号	品牌	描述	获取价格	数据表
ADP3339AKC-25	ADI	High-Accuracy Ultralow IQ, 1.5 A, anyCAP Low Dropout Regulator	获取价格
ADP3339AKC-285	ADI	High-Accuracy Ultralow IQ, 1.5 A, anyCAP Low Dropout Regulator	获取价格
ADP3339AKC-3.3	ADI	High Accuracy, Ultralow IQ, 1.5 A, anyCAP Low Dropout Regulator	获取价格
ADP3339AKC-3.3-RL	ADI	High Accuracy, Ultralow IQ,1.5 A,anyCAP Low Dropout Regulator	获取价格
ADP3339AKC-3.3-RL	ROCHESTER	3.3 V FIXED POSITIVE LDO REGULATOR, 0.48 V DROPOUT, PDSO3, HALOGEN FREE, TO-261AA, SOT-223	获取价格
ADP3339AKC-3.3-RL7	ADI	IC VREG 3.3 V FIXED POSITIVE LDO REGULATOR, 0.48 V DROPOUT, PDSO3, HALOGEN FREE, TO-261AA,	获取价格

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