AS3709-BQFM-00 ams

AS3709 Micro-PMIC with 5 DC/DCs and 2 LDOs The AS3709 is an ultra compact Micro-PMIC containing 5 General Description high-efficiency, constant-frequency synchronous buck converters in addition with two universal IO LDOs are available for lower current power rails. The wide input voltage range (2.7V to 5.5V), automatic power-save mode and minimal external component requirements make the AS3709 perfect for any single Li-Ion battery-powered or fixed 3.3V/5V supply application. Typical supply current with no load is 110A and decreases to 7A in shutdown mode. An internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The internally fixed switching frequency (2MHz, 3MHz or 4MHz) allows the use of small sur face mount external components. Very low output voltages can be delivered with the internal 0.6V feedback reference voltage. The AS3709 is available in a 32-pin QFN 4x4mm package and in a very compact WL-CSP36 with 0.4mm pitch. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS3709, Micro-PMIC with 5 DC/DCs and 2 LDOs are listed below: Figure 1: Added Value of Using AS3709 Benefits Features Compact design due to small coils for IO and 5 DC/DC step down regulators (2-4MHz) memory voltage generation Independent voltage rails for general purpose 2 universal IO LDOs IO supplies Flexible and fast adaptation to different OTP programmable boot sequence processors/applications Power saving control according to the Stand-by function with selectable rails and processors needs. programmable voltages Control Interface Self-contained start-up and control for IC control lines single-cell battery applications. ON key with 4s/8s emergency shut-down Safety shutdown feature. POR with RESET I/O 32-pin QFN (4mmx4mm), 0.4mm pitch Dedicated packages for specific applications. Optimization for PCB cost or size. 36-ball WL-CSP 0.4mm pitch ams Datasheet Page 1 v1-06 2017-Mar-01 Document FeedbackApplications The device is ideal for: SSDs, mobile communication devices Laptops and PDAs Ultra-low-power systems Medical instruments or any other space-limited application with low power-consumption requirements. Block Diagram The functional blocks of this device are shown below: Figure 2: AS3709 Block Diagram VSUP VSUP 2.2uF VSUP SD1 VIN LDO1 DCDC1 LX SD1 SD1 LDO1 0.7 1A 1uH LDO1 FB SD1 PMOS 0.6 10uF 0.6 3.35V 0.8 3.3V 2 4MHz PVSS SD1 VSS LDO1 2.2uF 2.2uF 300mA VSUP VSUP SD2 2.2uF DCDC2 LX SD2 AS3709 SD2 VSUP 0.7 1A 1uH FB SD2 VIN LDO2 10uF 0.6 3.35V LDO2 2 4MHz PVSS SD2 LDO2 PMOS 0.6 VSUP 0.8 3.3V VSS LDO2 2.2uF 2.2uF 2.2uF 300mA VSUP SD3 DCDC3 LX SD3 SD3 0.7 1A 1uH FB SD3 10uF 0.6 3.35V SCLK 2 4MHz PVSS SD3 I2C POR VSUP SDA 2.2uF VSUP SD4 ON DCDC4 LX SD4 SD4 0.7 1A 1uH FB SD4 0.6 3.35V 10uF XRES System PVSS SD4 2 4MHz Control 1uF V2 5 & VSUP Supervisor Reference VSSA 2.2uF VSUP SD5 (Supply & Temp) DCDC5 LX SD5 SD5 GPIO1 0.7 1A 1uH FB SD5 10uF 0.6 3.35V BOOT ROM GPIOs 2 4MHz PVSS SD5 GPIO2 OTP Page 2 ams Datasheet Document Feedback v1-06 2017-Mar-01