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AS1310 Datasheet(PDF) 2 Page - ams AG |
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AS1310 Datasheet(HTML) 2 Page - ams AG |
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2 / 20 page  www.austriamicrosystems.com/DC-DC_Step-Up/AS1310 Revision 1.8 1 - 19 Datasheet AS1310 Ultra Low Quiescent Current, Hysteretic DC-DC Step-Up Converter 1 General Description The AS1310 is an ultra low IQ hysteretic step-up DC-DC converter optimized for light loads (60mA), where it achieves efficiencies of up to 92%. AS1310 operates from a 0.7V to 3.6V supply and supports output voltages between 1.8V and 3.3V. Besides the available AS1310 standard variants any variant with output voltages in 50mV steps are available. See Ordering Information on page 18 for more information. If the input voltage exceeds the output voltage the device is in a feed-through 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. In order to save power the AS1310 features a shutdown mode, where it draws less than 100nA. During shutdown mode the battery is disconnected from the output. The AS1310 also offers adjustable low battery detection. If the battery voltage decreases below the threshold defined by two external resistors on pin LBI, the LBO output is pulled to logic low. The AS1310 is available in a TDFN (2x2) 8-pin package. Figure 1. AS1310 Typical Application Diagram 2 Key Features Input voltage range: 0.7V to 3.6V Fixed output voltage range: 1.8V to 3.3V Output current: 60mA @ VIN=0.9V, VOUT=1.8V Quiescent current: 1µA (typ.) Shutdown current: < 100nA Up to 92% efficiency Output disconnect in shutdown Feedthrough mode when VIN > VOUT Adjustable low battery detection No external diode or transistor required Over temperature protection TDFN (2x2) 8-pin package 3 Applications The AS1310 is an ideal solution for single and dual cell powered devices as blood glucose meters, remote controls, hearing aids, wireless mouse or any light-load application. VIN 0.7V to 3.6V AS1310 C2 22µF On Off C1 22µF GND 2 VOUT 1.8V to 3.3V 7 EN 8 VIN 4 VOUT 6 LBO 1 LBI R3 Low Battery Detect R1 R2 L1 6.8µH LX 3 CREF 100nF 5 REF |
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