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Nisshinbo Micro Devices Inc. R1225N502J-TR-FE product image
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Nisshinbo Micro Devices Inc. R1225N502J-TR-FE

Manufacturer
Nisshinbo Micro Devices Inc.
MPN
R1225N502J-TR-FE
LCSC Part #
C2441903
Packaging
SOT-23-6W
Customer #
Key Attributes
1 Fixed 5V Step-down type SOT-23-6W DC DC Switching Controllers RoHS
DatasheetNisshinbo Micro Devices Inc. R1225N502J-TR-FE
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1+$ 1.2009$ 1.20
200+$ 0.4647$ 92.94
500+$ 0.4492$ 224.60
1,000+$ 0.4415$ 441.50
Standard Packaging3000/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers
ManufacturerNisshinbo Micro Devices Inc.
PackagingSOT-23-6W
Synchronous RectifierNo
Operating Temperature-40℃~+85℃@(TA)
Output Current-
FeaturesProtection latch;Light load efficient mode
Number of Channels1
TopologyBuck
Frequency - Switching180kHz
Operating Voltage2.3V~18.5V
Output TypeFixed
Switch tube (built-in/external)External
Output Voltage5V
FunctionStep-down type
Quiescent Current20uA
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Introduction

AI Translation

The R1225N is a CMOS-based PWM step-down DC/DC converter controller with low supply current. It consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, a latchtype protection circuit, a PWM/VFM alternative circuit, a chip enable circuit, a phase compensation circuit, and an input voltage detect circuit. Further, protection circuit delay time adjuster circuit, and resistors for voltage detection are included. A low ripple, high efficiency step-down DC/DC converter can be easily composed of this IC with some external components, or a power-transistor, an inductor, a diode and capacitors. With a PWM/VFM alternative circuit, when the load current is small, the operation is automatically switching into the VFM oscillator from PWM oscillator, therefore the efficiency at small load current is improved. The R1225NxxxC/D/K types, which are without a PWM/VFM alternative circuit, are also available. If the term of maximum duty cycle keeps on a certain time, the embedded protection circuit works. It is latchtype protection circuit, and it works to latch an external Power MOSFET with keeping it off. 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. Delay Time for protection circuit is adjustable with an external capacitor. With a built-in UVLO function, when the input voltage is UVLO threshold or less, this IC keeps standby state, and saves its consumption current and avoids miss-operation. Further, if the set output voltage is equal or more than 2.1 V, with a built-in start-up function, at the power-on moment until the input voltage becomes more than the set output voltage, DC/DC operation is halted and avoids miss-operation.

Features

AI Translation
  • Wide Range of Input Voltage: 2.3 V to 18.5 V
  • Built-in Soft-start and Latch-type Protection
  • Three Options of Oscillator Frequency: 180 kHz, 300 kHz, 500 kHz
  • High Efficiency: Typ. 90%
  • Output Voltage: 1.2 V to 6.0 V, 0.1 V step
  • Standby Current: Typ. 0.0 μA
  • High Accuracy Output Voltage: ±2.0%
  • Low Temperature-Drift Coefficient of Output Voltage: Typ. ±100 ppm/°C

Applications

AI Translation
  • Hand-held Communication Equipment, Cameras, VCRs, Camcorders
  • Battery-powered Equipment
  • Household Electrical Appliances