AS1312-BWLM-45 ams

AS1312 Ultra Low Quiescent Current, Hysteretic DC-DC Step-Up Converter The AS1312 is an ultra low IQ hysteretic step-up DC-DC General Description converter. The AS1312 achieves an efficiency of up to 94% and is designed to operate from a +0.7V to +5.0V supply, the output voltage is fixed in 50mV steps from +2.5V to 5.0V. In order to save power the AS1312 features a shutdown mode, where it draws less than 100nA. In shutdown mode the battery is not connected to the output. If the input voltage exceeds the output voltage the device is in a feedthrough mode and the input is directly connected to the output voltage. In light load operation, the device enters a sleep mode when most of the internal operating blocks are turned off in order to save power. This mode is active approximately 50s after a current pulse provided that the output is in regulation. The AS1312 also offers an adjustable low battery detection. If the battery voltage decreases below a threshold defined by two external resistors on pin LBI, the LBO output is pulled to logic low. LBO is working as Power-OK when LBI is connected to GND. The AS1312 is available in a 8-pin (2x2) TDFN and a 0.4mm pitch 8-pin WL-CSP package. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS1312, Ultra Low Quiescent Current, Hysteretic DC-DC Step-Up Converter are listed below: Figure 1: Added Value of Using AS1312 Benefits Features Wide input voltage range (0.7V to 5.0V) Ideal for single Li-Ion battery powered Feedthrough mode when V > V applications IN OUT Extended battery life High efficiency up to 94% Low quiescent current of typ. 1A Less power consumption Low shutdown current of less than 100nA Fixed output voltage range (2.5V to 5.0V) Supports a variety of end applications Peak output current of 200mA Output disconnect in shutdown ams Datasheet Page 1 v1-19 2016-Apr-14 Document FeedbackAS13 12 Gene ral Des c rip t ion Benefits Features Over temperature protection and shutdown Integrated temperature monitoring Early power-fail warning Low battery detection 8-pin WL-CSP with 0.4mm pitch Cost effective, small package 8-pin TDFN (2mm x 2mm) Applications The AS1312 is an ideal solution for: Handheld devices Battery powered products Block Diagram The functional blocks of this device are shown below: Figure 2: AS1312 Block Diagram AS1312 V 0.7V to 5.0V IN LX Zero VOUT Crossing VOUT 2.5V to 5.0V L1 6.8F Detector COUT LBI 22F R3 100 k + ON EN LBO - 100mV OFF Startup VIN Driver & Circuitry Control Logic + C - IN 22F 0.6V - + 92.5% VREF Imax Detection REF VREF GND CREF 100nF Page 2 ams Datasheet Document Feedback v1-19 2016-Apr-14