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TI LM3670MF-1.2/NOPB product image
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TI LM3670MF-1.2/NOPBRoHS

Manufacturer
TI
MPN
LM3670MF-1.2/NOPB
LCSC Part #
C2070751
Packaging
SOT-23-5
Customer #
Key Attributes
Step-down DC-DC Converter for Mobile and Portable Applications
Datasheetpdf iconTI LM3670MF-1.2/NOPB
In-Stock: 46
46 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 1.5697$ 1.57
10+$ 1.3255$ 13.26
30+$ 1.1706$ 35.12
100+$ 1.0141$ 101.41
500+$ 0.9437$ 471.85
1,000+$ 0.9124$ 912.40
Standard Packaging1000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
ManufacturerTI
PackagingSOT-23-5
Operating Temperature-40℃~+85℃@(TA)
Frequency - Switching1MHz
FunctionStep-down type
Number of Outputs1
FeaturesCycle-by-cycle current limiting;Overcurrent Protection;Light load efficient mode
TopologyBuck
Output TypeFixed
Operating Voltage2.5V~5.5V
Switch tube (built-in/external)Built-in
Output Voltage1.2V
Output Current350mA
Quiescent Current15uA
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging1000
Sales UnitPiece

Introduction

AI Translation

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.

Features

AI Translation
  • 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, 3.3 V
  • 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)

Applications

AI Translation
  • Mobile Phones and Handheld Devices
  • PDAs
  • Palm-Top PCs
  • Portable Instruments
  • Battery-Powered Devices