AP2406ES5-1.2 Datasheet | Chipown

AP2406 Chipown 1.5Mhz, 700m A Synchronous Step-Down Converter Description The AP2406 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version and fixed output voltages, such as 1.2V, 1.5V, 1.8V, etc. Supply current with no load is 300u A and drops to <1u A in shutdown. The 2.5V to 6.5V input voltage range makes the AP2406 ideally suited for single Li-Ion, two to four AA battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. PWM pulse skipping mode operation provides very low output ripple voltage for noise sensitive applications. Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The AP2406 is available in a small SOT package. Applications z Cellular and Smart Phones z Microprocessors and DSP Core Supplies z Wireless and DSL Modems z PDAs z MP3 / MP4 /MPM Player z Digital Still and Video Cameras z Portable Instruments Features z High Efficiency: Up to 96% z 1.5MHz Constant Switching Frequency z 700m A Output Current at VIN=3V z Integrated Main switch and synchronous rectifier. No Schottky Diode Required z 2.5V to 6.5V Input Voltage Range z Output Voltage as Low as 0.6V z 100% Duty Cycle in Dropout z Quiescent Current: 300µA(input < 4.2V) z Slope pensated Current Mode Control for Excellent Line and Load Transient Response z Short Circuit Protection z <1u A Shutdown Current z Space Saving 5-Pin SOT23 package Typical Application Circuit η(%) 100 90 80 70 60 50 40 30 20 10 0 η vs Io VIN=2.5V VIN=3.6V VIN=4.2V VIN=5.0V 10 Io(m A) VOUT=1.8V TA=25C Figure 1. Basic Application Circuit with AP2406 adjustable version Figure 2....