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Updated at 17/06/2025 10:30:15(UTC+8)
Certifications
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Description
- The LM3670 step-down DC-DC converter is optimized for powering ultralow voltage circuits from a single Li-Ion cell or three-cell NiMH/NiCd batteries. It provides up to 350-mA load current, over an input voltage range from 2.5 V to 5.5 V. There are several different fixed voltage output options available as well as an adjustable output voltage version.
- The device offers superior features and performance for mobile phones and similar portable applications with complex power management systems. Automatic intelligent switching between pulse width modulation (PWM) low-noise and pulse frequency modulation (PFM) low-current mode offers improved system control. During full-power operation, a fixed-frequency 1-MHz (typical) PWM mode drives loads from approximately 70 mA to 350 mA maximum, with up to 95% efficiency. Hysteretic PFM mode extends the battery life through reduction of the quiescent current to 15 µA (typical) during light current loads and system standby. Internal synchronous rectification provides high efficiency (90% to 95% typical at loads between 1 mA and 100 mA). In shutdown mode (enable (EN) pin pulled low) the device turns off and reduces battery consumption to 0.1 µA (typical).
- The LM3670 is available in a 5-pin SOT-23 package. A high switching frequency (1 MHz typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required.
- For all available packages, see the orderable addendum at the end of the data sheet.
- Input Voltage Range: 2.5 V to 5.5 V
- Adjustable Output Voltages (VOUT): 0.7 V to 2.5 V
- Fixed Output Voltages: 1.2 V, 1.5 V, 1.6 V, 1.8 V, 1.875 V, 3.3V
- 15-µA Typical Quiescent Current
- 350-mA Maximum Load Capability
- 1-MHz PWM Fixed Switching Frequency (Typical)
- Automatic PFM and PWM Mode Switching
- Low Dropout Operation – 100% Duty Cycle Mode
- Internal Synchronous Rectification for High Efficiency
- Internal Soft Start
- 0.1-µA Typical Shutdown Current
- Current Overload Protection
- Operates from a Single Li-Ion Cell or Three-Cell NiMH/NiCd Batteries
- Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors)
LM3670 Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Case/Package | SOT-5 |
| Show | |
| RoHS | RoHS Compliant |
| Lead-Free Status | Lead Free |
Order guide
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TT in advance (bank transfer), Western Union, Credit card,
PayPal. Customer is responsible for shipping fee, bank
charges, duties and taxes.
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- You can choose whether shipping charges will be charged through your shipping account or by us.
- Please confirm with the logistics company in advance for remote areas.
(Additional charges ($35-$50) may apply for delivery in these areas)
- Delivery date: usually 2 to 7 working days.
- A tracking number will be sent after your order ships.
- - Carefully inspected and packed by ManyChip warehouse - Vacuum packaging - Anti-static packaging - Shockproof foam
- The terms here are for reference only, the actual terms are subject to the sales quotation. - Please confirm product specifications when ordering. - MOQ refers to the minimum order quantity required to purchase each part. - If you have special ordering instructions, please indicate them on the ordering page. - Inspection (PSI) will be performed prior to shipment.
- - Income Quality Control (IQC), 1000+ qualified dealers. - Chips are tested by authoritative organizations to ensure the quality, authenticity and safety of your device. - Decapsulation control - X-ray control - XRF inspection - Electrical testing - Surface testing -Digital components warehouse, covering an area of 800 square meters, with constant temperature and humidity
Contact Us
If you have any problem,please email to sales@manychip.com, we will response as soon as possisble.
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