AP7168 1.2A LOW DROPOUT REGULATOR WITH POK Description Pin Assignments The AP7168 is a 1.2A, adjustable output voltage, ultra-low ( Top View ) dropout linear regulator. The device includes pass element, error amplifier, band-gap reference, current limit and thermal shutdown circuitry. The device is turned on when EN pin is IN 1 8 OUT set to logic high level. A Power-OK (POK) output is available for power sequence control. FB 2 7 POK The characteristics of the low dropout voltage and low 3 6 NC NC quiescent current make it suitable for low to medium power applications, for example, laptop computers, audio and video EN 4 5 GND applications, and battery powered devices. The typical quiescent current is approximately 125A. Built-in current-limit and thermal-shutdown functions prevent SO-8EP IC from damage in fault conditions. The AP7168 is available in SO-8EP package. Features Applications Wide input voltage range: 2.2V 5.5V Servers and laptops 230mV very low dropout at 500mA load Smart phone and PDA 500mV very low dropout at 1A load MP3/MP4 Very low quiescent current (I ): 125A typical Q Bluetooth headset Adjustable output voltage range: 0.8V to 5.0V Low and medium power applications Very fast transient response FPGA and DSP core or I/O power High PSRR Accurate voltage regulation Current limiting and short circuit protection Thermal shutdown protection Stable with any type output capacitor 4.7F Ambient temperature range -40C to 85C SO-8EP: Available in Green Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at AP7168 1.2A LOW DROPOUT REGULATOR WITH POK Pin Descriptions Name Pin Number Description IN 1 Voltage input pins, to be tied together externally. Bypass to ground through at least 1F capacitor. POK 2 Power-OK output, active-high open-drain. EN 4 Enable input, active high. GND 5 Ground. FB 7 Output feedback. Voltage output pins, to be tied together externally. Bypass to ground through at least 4.7F OUT 8 ceramic capacitor. NC 3, 6 No connection. Functional Block Diagram IN OUT Current Limit Gate and Thermal EN Driver Shutdown FB 0.8V POK 0.744V GND Absolute Maximum Ratings Symbol Parameter Ratings Unit ESD HBM Human Body Model ESD Protection 4 KV ESD MM Machine Model ESD Protection 300 V V Input Voltage 7 V IN OUT, FB, POK, EN Voltage V + 0.3 V IN Continuous Load Current Internal Limited T Operating Junction Temperature Range -40 ~ 150 C J T Storage Temperature Range -65 ~150 C ST P Power Dissipation SO-8EP (Note 2, 4) 4.0 W D Notes: 2. Ratings apply to ambient temperature at 25C Recommended Operating Conditions Symbol Parameter Min Max Unit Input voltage 2.2 5.5 V V IN Output Current 0 1.2 A I OUT Operating Ambient Temperature -40 85 T C A 2 of 11 September 2010 AP7168 Diodes Incorporated www.diodes.com Document number: DS32019 Rev. 2 - 2 NEW PRODUCT