Datasheet > 电源电路 > 开关式稳压器或控制器> ADP1111AN-5

ADP1111AN-5

更新时间： 2024-01-10 11:01:44

品牌	Logo	应用领域
亚德诺 - ADI		稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数	文件大小	规格书
16页	409K
描述
Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V

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中文翻译

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技术参数
数据手册
替代型号

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ADP1111AN-5 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	DIP
包装说明：	PLASTIC, DIP-8	针数：	8
Reach Compliance Code：	unknown	风险等级：	5.17
Is Samacsys：	N	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
控制模式：	VOLTAGE-MODE	控制技术：	PULSE FREQUENCY MODULATION
最大输入电压：	30 V	最小输入电压：	2 V
标称输入电压：	3 V	JESD-30 代码：	R-PDIP-T8
JESD-609代码：	e0	长度：	9.88 mm
湿度敏感等级：	NOT APPLICABLE	功能数量：	1
端子数量：	8	最高工作温度：	70 °C
最低工作温度：		最大输出电流：	1.5 A
标称输出电压：	5 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	240
座面最大高度：	5.33 mm	表面贴装：	NO
切换器配置：	BUCK-BOOST	最大切换频率：	88 kHz
温度等级：	COMMERCIAL	端子面层：	TIN LEAD
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	7.62 mm	Base Number Matches：	1

ADP1111AN-5 数据手册

ADP1111

LIM

This occurs in the step-up mode when the following condition is

met:

(EXTERNAL)

LIM

V_OUT+ V_DIODE

V_IN− V_SW

80Ω

(INTERNAL)

1 − DC

ADP1111

where DC is the ADP1111’s duty cycle. When this relationship

exists, the inductor current does not go all the way to zero

during the time that the switch is OFF. When the switch turns

on for the next cycle, the inductor current begins to ramp up

from the residual level. If the switch ON time remains constant,

the inductor current will increase to a high level (see Figure 24).

This increases output ripple and can require a larger inductor

and capacitor. By controlling switch current with the I_LIM

resistor, output ripple current can be maintained at the design

values. Figure 25 illustrates the action of the I_LIMcircuit.

200

SW1

SW2

DRIVER

72kHz

OSC

POWER

SWITCH

Figure 26. ADP1111 Current Limit Operation

The delay through the current limiting circuit is approximately

1 µs. If the switch ON time is reduced to less than 3 µs, accuracy

of the current trip-point is reduced. Attempting to program a

switch ON time of 1 µs or less will produce spurious responses

in the switch ON time; however, the ADP1111 will still provide

a properly regulated output voltage.

PROGRAMMING THE GAIN BLOCK

The gain block of the ADP1111 can be used as a low-battery

detector, error amplifier or linear post regulator. The gain block

consists of an op amp with PNP inputs and an open-collector

NPN output. The inverting input is internally connected to the

ADP1111’s 1.25 V reference, while the noninverting input is

available at the SET pin. The NPN output transistor will sink

about 300 µA.

200mA/div

Figure 27a shows the gain block configured as a low-battery

monitor. Resistors R1 and R2 should be set to high values to

reduce quiescent current, but not so high that bias current in

the SET input causes large errors. A value of 33 kΩ for R2 is a

good compromise. The value for R1 is then calculated from the

formula:

Figure 24.

V_LOBATT− 1. 25 V

R1 =

1. 25 V

where V_LOBATTis the desired low battery trip point. Since the

gain block output is an open-collector NPN, a pull-up resistor

should be connected to the positive logic power supply.

200mA/div

47k

Figure 25.

ADP1111

The internal structure of the I_LIMcircuit is shown in Figure 26.

Q1 is the ADP1111’s internal power switch that is paralleled by

sense transistor Q2. The relative sizes of Q1 and Q2 are scaled

so that I_Q2is 0.5% of I_Q1. Current flows to Q2 through an

internal 80 Ω resistor and through the R_LIMresistor. These two

resistors parallel the base-emitter junction of the oscillator-

disable transistor, Q3. When the voltage across R1 and R_LIM

exceeds 0.6 V, Q3 turns on and terminates the output pulse. If

only the 80 Ω internal resistor is used (i.e. the I_LIMpin is

connected directly to V_IN), the maximum switch current will be

1.5 A. Figure 6 gives R_LIMvalues for lower current-limit values.

1.25V

REF

BAT

SET

PROCESSOR

GND

33k

–1.25V

R1= –––––––––

35.1µA

= BATTERY TRIP POINT

Figure 27a. Setting the Low Battery Detector Trip Point

REV. 0

–12–

1...9 10 111213 14 15 16

中文翻译

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ADP1111AN-5 替代型号

型号	品牌	替代类型	描述	数据表
ADP1111ANZ-5	ADI	类似代替	Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V

与ADP1111AN-5相关器件

型号	品牌	获取价格	描述	数据表
ADP1111ANZ	ROCHESTER	获取价格	1.5 A SWITCHING REGULATOR, 88 kHz SWITCHING FREQ-MAX, PDIP8, PLASTIC, DIP-8
ADP1111ANZ	ADI	获取价格	Micropower, Step-Up/Step-Down SW lator; Adjustable and Fixed 3.3 V, 5 V, 12 V
ADP1111ANZ-12	ROCHESTER	获取价格	1.5 A SWITCHING REGULATOR, 88 kHz SWITCHING FREQ-MAX, PDIP8, PLASTIC, DIP-8
ADP1111ANZ-12	ADI	获取价格	Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
ADP1111ANZ-3.3	ADI	获取价格	Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
ADP1111ANZ-3.3	ROCHESTER	获取价格	1.5 A SWITCHING REGULATOR, 88 kHz SWITCHING FREQ-MAX, PDIP8, PLASTIC, DIP-8
ADP1111ANZ-5	ADI	获取价格	Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
ADP1111ANZ-5	ROCHESTER	获取价格	1.5 A SWITCHING REGULATOR, 88 kHz SWITCHING FREQ-MAX, PDIP8, PLASTIC, DIP-8
ADP1111AR	ADI	获取价格	Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
ADP1111AR-12	ADI	获取价格	Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V

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