Datasheet > 电源电路 > 开关式稳压器或控制器> R1221N20AG

R1221N20AG

更新时间： 2024-01-28 18:53:14

品牌	Logo	应用领域
理光 - RICOH		开关控制器
页数	文件大小	规格书
21页	220K
描述
Voltage-Mode SMPS Controller

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技术参数
数据手册

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R1221N20AG 技术参数

生命周期：	Obsolete	零件包装代码：	SOT-23
包装说明：	LSSOP,	针数：	6
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.84
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	最大输入电压：	13.2 V
最小输入电压：	2.3 V	标称输入电压：	6 V
JESD-30 代码：	R-PDSO-G6	JESD-609代码：	e2
长度：	2.9 mm	功能数量：	1
端子数量：	6	最高工作温度：	85 °C
最低工作温度：	-40 °C	标称输出电压：	2 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
认证状态：	Not Qualified	座面最大高度：	1.4 mm
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	560 kHz	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	TIN SILVER
端子形式：	GULL WING	端子节距：	0.95 mm
端子位置：	DUAL	宽度：	1.8 mm
Base Number Matches：	1

R1221N20AG 数据手册

99.12.8

‘

Step-down DC/DC Converter with Voltage Detector

12345

R1221N Series

n OUTLINE

The R1221N Series are PWM step-down DC/DC Converter controllers embedded with a voltage detector, with

low supply current by CMOS process.

Each step-down DC/DC converter in these ICs consists of an oscillator, a PWM control circuit, a reference

voltage unit, an error amplifier, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, a chip

enable circuit, and resistors for voltage detection. A low ripple, high efficiency step-down DC/DC converter can be

composed of this IC with only four external components, or a power-transistor, an inductor, a diode and a

capacitor.

The output voltage of DC/DC converter can be supervised by the built-in voltage detector.

With a PWM/VFM alternative circuit, when the load current is small, the operation turns into the VFM oscillator

from PWM oscillator automatically, therefore the efficiency at small load current is improved.

And the PWM/VFM alternative circuit is an option, in terms of C version and D version, the circuit is not included.

If the term of maximum duty cycle keeps on a certain time, the embedded protection circuit works. There are two

types of protection function. One is latch-type protection circuit, and it works to latch an external Power MOS with

keeping it disable. To release the condition of protection, after disable this IC with a chip enable circuit, enable it

again, or restart this IC with power-on. The other is Reset-type protection circuit, and it works to restart the

operation with soft-start and repeat this operation until maximum duty cycle condition is released. Either of these

protection circuits can be designated by users’ request.

n FEATURES

l Wide Range of Input Voltage · · · · · · · · · · · · · 2.3V to 13.2V

l Built-in Soft-start Function and two choices of Protection Function(Latch-type or Reset-type)

l Two choices of Oscillator Frequency · · · · · · · · · · 300kHz, 500kHz

l High Efficiency · · · · · · · · · · · · · · · · · · · · · · TYP. 90%

l Standby Current · · · · · · · · · · · · · · · · · · · · · TYP. 0µA

l Setting Output Voltage · · · · · · · · · · · · · · · · · Stepwise setting with a step of 0.1V in the range of

1.5V to 5.0V

l High Accuracy Output Voltage · · · · · · · · · · · · · · ±2.0%

l Setting Detector Threshold Voltage · · · · · · · · · · · Stepwise setting with a step of 0.1V in the range of

1.2V to 4.5V

l High Accuracy Detector Threshold Voltage· · · · · · · ±2.0%

l Low Temperature-Drift Coefficient of Output Voltage · TYP. ±100ppm/°C

n APPLICATIONS

l Power source for hand-held communication equipment, cameras, video instruments such as VCRs,

camcorders.

l Power source for battery-powered equipment.

l Power source for household electrical appliances.

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Rev. 1.11

- 1 -

12 3 4 5 6 7...21

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与R1221N20AG相关器件

型号	品牌	描述	获取价格	数据表
R1221N20AG-TR	RICOH	Voltage-Mode SMPS Controller	获取价格
R1221N20AG-TR-FA	RICOH	Switching Controller, 0.025A, 360kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN	获取价格
R1221N20AH	RICOH	Voltage-Mode SMPS Controller	获取价格
R1221N20AH-TR	RICOH	Voltage-Mode SMPS Controller	获取价格
R1221N20AH-TR-FA	RICOH	Switching Controller, 0.025A, 600kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN	获取价格
R1221N20XA-TR	ETC	SMPS Controller	获取价格

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