LM3670MF-3.3 Integrated Circuits (ICs)

Voltage - Output (Min/Fixed):	3.3V
Base Part Number:	LM3670
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	350mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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.IntroductionThe LM3670MF-3.3 is a PMIC regulator designed for power management applications. This device combines a high efficiency DC-DC converter and a low dropout (LDO) regulator. It has an integrated voltage converter that provides up to 2 A of output current and adjustable output voltage from 0.7V to 3.3V. It also offers a maximum quiescent current of 1.25 mA and a maximum output noise of 30 μVrms. This makes the device ideal for low power applications such as wearables and IoT devices.DC-DC Switching RegulatorThe LM3670MF-3.3 includes a DC-DC switching regulator. This type of regulator uses a switching element to convert a DC input voltage to a regulated output voltage. It can also be used to step down or step up the voltage. The switching elements used in this type of regulator include transistors, SCRs and MOSFETs. The switching element is driven by a pulse width modulation (PWM) signal, which is generated by an internal oscillator. The switching frequency of the oscillator determines the output voltage ripple. Higher switching frequencies produce lower output voltage ripple.The LM3670MF-3.3 has a PWM switching frequency of 2 MHz and can provide up to 2A of output current. It also offers an adjustable output voltage from 0.7V to 3.3V. The adjustable output voltage feature can be used to match the output voltage to the load requirements.LDO RegulatorThe LM3670MF-3.3 also includes a low dropout (LDO) regulator. This type of regulator is used to provide a regulated output voltage from an unregulated input voltage. The LDO uses a series of transistors to regulate the output voltage and maintain a linear voltage drop across the series elements.The LM3670MF-3.3 has an adjustable output voltage that can be set from 0.7V to 3.3V with a maximum quiescent current of 1.25 mA. The output voltage is regulated with a high accuracy of 0.15% with a maximum output noise of 30 μVrms.FeaturesThe LM3670MF-3.3 offers many features that make it an ideal device for power management applications. These features include:• High Efficiency: The device offers a high efficiency rating of 90%.• Low Dropout: The device has a low dropout voltage of 0.3V.• Low Quiescent Current: The device has a quiescent current of 1.25 mA.• Adjustable Output Voltage: The device has an adjustable output voltage from 0.7V to 3.3V.• Output Ripple: The device has a maximum output ripple of 30 μVrms.• Wide Operating Temperature Range: The device has an operating temperature range of -40°C to +85°C.ConclusionThe LM3670MF-3.3 is a PMIC voltage regulator that combines a high efficiency DC-DC converter and a low dropout (LDO) regulator. It has an adjustable output voltage from 0.7V to 3.3V, a maximum output current of 2A, a maximum quiescent current of 1.25 mA, and a maximum output ripple of 30 μVrms. It is ideal for low power applications such as wearables and IoT devices.

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