Texas Instruments LM3686
The LM3686 is a step-down DC-DC converter with a very low-dropout linear regulator and a low-noise linear regulator optimized for powering ultra-low voltage circuits. It provides three outputs with combined load current up to 900 mA over an input voltage range from 2.7 V to 5.5 V. The device offers superior features and performance for many applications.| Part No. | LM3686 |
|---|---|
| Datasheet | LM3686 Download |
| Manufacturer |  Texas Instruments |
| Description | Step-Down DC-DC Converter |
| Buy | Stock & Price |
FEATURES
●1 DC-DC Regulator – VOUT_DCDC = 1.2 V to 2.5 V – 600-mA Maximum ILOAD – 3-MHz Typical PWM Fixed Switching Frequency – Automatic PFM/PWM Mode Switching – Internal Synchronous Rectification – Internal Soft Start● Dual-Rail Linear Regulator: LILO – Load Transients < 50-mV Peak Typical – Line Transients < 1-mV Peak Typical – VOUT_LILO = 0.7 V to 2 V – 70-µA Typical IQ and 300-mA Maximum ILOAD
● Linear Regulator: LDO – Load Transients < 80-mV Peak Typical – Line Transients < 1-mV Peak Typical – VOUT_LDO = 1.5 V to 3.3 V – 50-µA Typical IQ and 350-mA Maximum ILOAD
● Combined Global
FEATURES
– VBATT ≥ Maximum (VOUT_LILO + 1.5 V, 2.7 V) – Operates From a Single Li-Ion Cell or 3-Cell NiMH/NiCd Batteries – 100-µA IQ and 900-mA Maximum ILOAD 2APPLICATIONS
● Mobile TVs, Hand-Held Radios● Personal Digital Assistants, Palm-Top PCs
● Portable Instruments and Personal Clients
● Battery-Powered Devices 3
DESCRIPTION
Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control.
