LM3686 Datasheet | Texas Instruments

Features - 1 DC-DC Regulator - VOUT_DCDC = 1.2 V to 2.5 V - 600-m A 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-m V Peak Typical - Line Transients < 1-m V Peak Typical - VOUT_LILO = 0.7 V to 2 V - 70-µA Typical IQ and 300-m A Maximum ILOAD - Linear Regulator: LDO - Load Transients < 80-m V Peak Typical - Line Transients < 1-m V Peak Typical - VOUT_LDO = 1.5 V to 3.3 V - 50-µA Typical IQ and 350-m A Maximum ILOAD - bined Global Features - VBATT ≥ Maximum (VOUT_LILO + 1.5 V, 2.7 V) - Operates From a Single Li-Ion Cell or 3-Cell Ni MH/Ni Cd Batteries - 100-µA IQ and 900-m A Maximum ILOAD 2 Applications - Mobile TVs, Hand-Held Radios - Personal Digital Assistants, Palm-Top PCs - Portable Instruments and Personal Clients - Battery-Powered Devices 3 Description 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 bined load current up to 900 m A over an input voltage range from 2.7 V to 5.5 V. The device offers superior features and performance for many applications. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During full-power operation, a fixed-frequency 3 MHz (typical), PWM mode drives loads from approximately 70 m A to 600 m A maximum. Hysteretic PFM mode extends the battery life through reduction of the quiescent current to 28 μA (typical) at light load and system standby. Internal synchronous rectification provides high efficiency. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) DSBGA (12) 2.435 mm × 1.687 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application EN_DCDC EN_LILO EN_LDO VIN_LDO 1 PF, 0402...