Datasheet > R1223N472B-TL

R1223N472B-TL

更新时间： 2024-01-28 16:59:23

品牌	Logo	应用领域
理光 - RICOH		开关光电二极管
页数	文件大小	规格书
19页	203K
描述
Switching Controller, Voltage-mode, 0.01A, 600kHz Switching Freq-Max, CMOS, PDSO5, SOT-23, 5 PIN

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技术参数
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R1223N472B-TL 技术参数

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：	SOT-23
包装说明：	LSSOP, TSOP5/6,.11,37	针数：	5
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.69
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	VOLTAGE-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	13.2 V
最小输入电压：	2.3 V	标称输入电压：	8 V
JESD-30 代码：	R-PDSO-G5	JESD-609代码：	e0
长度：	2.9 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	5
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出电流：	0.01 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	LSSOP	封装等效代码：	TSOP5/6,.11,37
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	认证状态：	Not Qualified
座面最大高度：	1.4 mm	子类别：	Switching Regulator or Controllers
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	600 kHz	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
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

R1223N472B-TL 数据手册

n TYPICAL APPLICATIONS AND APPLICATION HINTS

PMOS

EXT

VIN

V^OUT

C^OUT

SD1

Load

CIN

GND

CE CONTROL

PMOS : HAT1020R(Hitachi), Si3443DV(Siliconix)

SD1 : RB491D (Rohm)

: CD105(Sumida, 27mH)

COUT : 47mF(Tantalum Type)

CIN

: 10mF52(Tantalum Type)

When you use these ICs, consider the following issues;

l As shown in the block diagram, a parasitic diode is formed in each terminal, each of these diodes is not formed

for load current, therefore do not use it in such a way. When you control the CE pin by another power supply,

do not make its "H" level more than the voltage level of VIN pin.

l The operation of Latch-type protection circuit is as follows;

When the maximum duty cycle continues longer than the delay time for protection circuit, (Refer to the Electrical

Characteristics) the protection circuit works to shut-down Power MOSFET with its latching operation. Therefore

when an input/output voltage difference is small, the protection circuit may work with small load current.

To release the protection latch state, after disable this IC with a chip enable circuit, enable it again, or restart this

IC with power-on. However, in the case of restarting this IC with power-on, after the power supply is turned off, if a

certain amount of charge remains in CIN, or some voltage is forced to VIN from CIN, this IC might not be restarted

even after power-on.

If rising transition speed of supply voltage is too slow, or the time which is required for VIN voltage to reach Output

voltage of DC/DC converter is longer than soft-starting time plus delay time for protection circuit, protection circuit

works before VIN voltage reaches Output voltage of DC/DC converter. To prevent this action, while power supply

voltage is not ready, make this IC be standby mode(CE=”L”), and when the power supply is ready (the voltage level

of VIN is equal or more than the voltage level of VOUT), make it enable(CE=”H”).

l The operation of Reset-type protection circuit is as follows;

When the maximum duty cycle continues longer than the delay time for protection circuit, (Refer to the Electrical

Characteristics) the protection circuit works to restart with soft-start operation. Therefore when an input/output

voltage difference is small, the protection circuit may work with small load current.

l Set external components as close as possible to the IC and minimize the connection between the components

and the IC. In particular, a capacitor should be connected to VOUT pin with the minimum connection. And make

sufficient grounding and reinforce supplying. A large switching current flows through the connection of power

supply, an inductor and the connection of VOUT. If the impedance of the connection of power supply is high, the

voltage level of power supply of the IC fluctuates with the switching current. This may cause unstable operation of

the IC.

l Use capacitors with a capacity of 22mF or more for VOUT pin, and with good high frequency characteristics such

as tantalum capacitors. We recommend you to use capacitors with an allowable voltage which is at least twice as

much as setting output voltage. This is because there may be a case where a spike-shaped high voltage is

generated by an inductor when an external transistor is on and off.

l Choose an inductor that has sufficiently small D.C. resistance and large allowable current and is hard to reach

magnetic saturation. And if the value of inductance of an inductor is extremely small, the ILX may exceed the

absolute maximum rating at the maximum loading.

12345

Rev. 1.11

- 7 -

1...4 5 678 9 10...19

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与R1223N472B-TL相关器件

型号	品牌	获取价格	描述	数据表
R1223N472B-TL-FA	RICOH	获取价格	Switching Controller, 600kHz Switching Freq-Max, CMOS, PDSO5, SOT-23, 5 PIN
R1223N472BTR	ETC	获取价格	Voltage-Mode SMPS Controller
R1223N472B-TR	RICOH	获取价格	Switching Controller, Voltage-mode, 0.01A, 600kHz Switching Freq-Max, CMOS, PDSO5, SOT-23,
R1223N472B-TR-FA	RICOH	获取价格	Switching Controller, 600kHz Switching Freq-Max, CMOS, PDSO5, SOT-23, 5 PIN
R1223N472C	ETC	获取价格	Voltage-Mode SMPS Controller
R1223N472CTL	ETC	获取价格	Voltage-Mode SMPS Controller
R1223N472C-TL-FA	RICOH	获取价格	Switching Controller, 360kHz Switching Freq-Max, CMOS, PDSO5, SOT-23, 5 PIN
R1223N472CTR	ETC	获取价格	Voltage-Mode SMPS Controller
R1223N472C-TR	RICOH	获取价格	Switching Controller, Voltage-mode, 0.01A, 360kHz Switching Freq-Max, CMOS, PDSO5, SOT-23,
R1223N472C-TR-FA	RICOH	获取价格	Switching Controller, 360kHz Switching Freq-Max, CMOS, PDSO5, SOT-23, 5 PIN

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