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参数资料
| 型号： | R5210D28A-TR |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 稳压器 |
| 英文描述： | 0.7 A SWITCHING REGULATOR, 960 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 0.90 MM HEIGHT, HSON-6 |
| 文件页数： | 1/13页 |
| 文件大小： | 136K |
| 代理商： | R5210D28A-TR |
Step-downDC/DC Converter with VR and Reset
R5210XSeries
2002.9.12
12345
Rev. 1.11
- 1 -
n OUTLINE
The R5210X is CMOS-based PWM step-down DC/DC converter combined with a voltage regulator
(VR) and a voltage detector (VD), with low supply current.
Each of these ICs consists of an oscillator, a PWM control circuit, a reference voltage unit, an error
amplifier, a soft-start circuit, a current limit circuit, a phase compensation circuit, a resistor net for
voltage detect circuit, an output driver transistor, and so on. A low ripple, high efficiency step-down
DC/DC converter can be easily composed of this IC with some external components, or an inductor, a
diode, and capacitors.
The oscillator frequency is 800kHz, therefore small inductor and capacitor can be used with this IC.
Further, this IC equips the under voltage lockout function (UVLO). If the input voltage becomes 2.35V
(Typ.) or less, the output of DC/DC converter is turned off. However, embedded voltage regulator and
the detector continue to operate.
The voltage regulator consists of a reference voltage unit, a resistor net for voltage detect circuit,
an error amplifier, an output driver transistor, and so on.
The built-in voltage detector supervises the input voltage and the output is N-channel open drain type.
Power-on reset delay time is also included and internally set typically at 10ms.
n FEATURES
l
Wide Range of Input Voltage
2.7V5.5V
l
Built-in Soft-start Function (Typ. 2ms) and built-in power-on reset delay (Typ. 10ms)
l
Maximum Output Current
500mA(DC/DC), 200mA(VR)
l
High Accuracy Output Voltage
±2.0%(DC/DC and Voltage Regulator Output)
l
Accuracy of voltage detector
±2.5%
l
Output Voltage(VR)
Stepwise Setting with a step of 0.1V in the range of 2.5V to 3.6V
l
Output Voltage(DC/DC)
Stepwise Setting with a step of 0.1V in the range of 1.5V to 3.3V
l
Output Voltage(VD)
Stepwise Setting with a step of 0.1V in the range of 3.0V to 4.5V
l
Packages
SOT23-6W(thickness: Max. 1.3mm) or HSON6(thickness: Max. 0.9mm)
n APPLICATIONS
l Power source for hand-held communication equipment, CD or DVD drives.
l Power source for battery-powered equipment.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| R5210N001C-TR | 制造商:未知厂家 制造商全称:未知厂家 功能描述:SMPS Controller |
| R5210X | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:Step-down DC/DC Converter with VR and Reset |
| R5210XXXXC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Management ICs |
| R5212D | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:Step-down DC/DC Converter with VR and Reset |
| R5212D011A | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:Step-down DC/DC Converter with VR and Reset |
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