LM3670MF-1.8/NOPB Part Information

Details for LM3670MF-1.8/NOPB by Texas Instruments

Electronic & Electrical Components>Semiconductors - ICs>Power Management

Part 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.

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Part Features

  • 0.1-u00b5A Typical Shutdown Current
  • 1-MHz PWM Fixed Switching Frequency (Typical)
  • 15-u00b5A Typical Quiescent Current
  • 350-mA Maximum Load Capability
  • Adjustable Output Voltages (VOUT): 0.7 V to 2.5 V
  • Automatic PFM and PWM Mode Switching
  • Current Overload Protection
  • Fixed Output Voltages: 1.2 V, 1.5 V, 1.6 V, 1.8 V, 1.875 V, 3.3V
  • Input Voltage Range: 2.5 V to 5.5 V
  • Internal Soft Start
  • Internal Synchronous Rectification for High Efficiency
  • Low Dropout Operation u2013 100% Duty Cycle Mode
  • Only Three Tiny Surface-Mount External
  • Operates from a Single Li-Ion Cell or Three-Cell NiMH/NiCd Batteries

Part Specifications

Topology Buck (Step Down)
Input Voltage Min 2.5V
Input Voltage Max 5.5V
DC / DC Converter IC Case SOT-23
No. of Pins 5Pins
Output Current 350mA
Output Voltage Nom. 1.8V
Switching Frequency 1MHz
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • DC/DC CONV, BUCK, 1MHZ, SOT-23-5; Topology:Buck (Step Down); Input Voltage Min:2.5V; Input Voltage Max:5.5V; DC / DC Converter IC Case:SOT-23; No. of Pins:5Pins; Output Current:350mA; Output Voltage Nom.:1.8V; Switching RoHS Compliant: Yes | Newark Electronics
  • Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits | Texas Instruments

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LM3670MF-1.8/NOPB?

Additional datasheets, footprints and schematics for LM3670MF-1.8/NOPB are listed in our Part Details tab. You can also find the LM3670MF-1.8/NOPB image and similar parts on this details page.

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What category does LM3670MF-1.8/NOPB fall under?

The LM3670MF-1.8/NOPB is listed under Electronic & Electrical Components > Semiconductors - ICs > Power Management.

Can I view similar or alternative parts?

You can view similar parts to LM3670MF-1.8/NOPB when available in the Power Management range under the specifications section at the bottom of the details page.

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Is the LM3670MF-1.8/NOPB RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

Which authorised distributors for LM3670MF-1.8/NOPB have stock available?

Authorised distributors including Newark Electronics and Texas Instruments have stock available or on a lead time for LM3670MF-1.8/NOPB.

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