描述 Description

The AS1312 is an ultra low IQ hysteretic DC-DC step-up 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 50μs 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.

特性 Features

·Wide input voltage range (0.7V to 5.0V)
·Low shutdown current of less than 100nA
·Low quiescent current of 1μA
·Peak output current of 200mA
·94% efficiency
·8-pin WL-CSP with 0.4mm pitch

應(yīng)用 Application

·Handheld devices
·Battery-powered products