ZXRD100APQ16TA

ZXRD1000 SERIES HIGH EFFICIENCY SIMPLESYNC  PWM DC-DC CONTROLLERS DESCRIPTION ZXRD1000 series can be used with an all N channel topology or a combination N & P channel topology. Additional functionality includes shutdown control, a user adjustable low battery flag and simple adjustment of the fixed PWM switching frequency. The controller is available with fixed outputs of 5V or 3.3V and an adjustable (2.0 to 12V) output. The ZXRD1000 series provides complete control and protection functions for a high efficiency (> 95%) DC-DC converter solution. The choice of external MOSFETs allow the designer to size devices according to application. The ZXRD1000 series uses advanced DC-DC converter techniques to provide synchronous drive capability, using innovative circuits that allow easy and cost effective implementation of shoot through protection. The FEATURES • • • • • > 95% Efficiency Fixed frequency (adjustable) PWM Voltage mode to ensure excellent stability & transient response • • • • • • • • • Low quiescent current in shutdown mode,15µA Low battery flag Output down to 2.0V Overload protection Demonstration boards available Synchronous or non-synchronous operation Cost effective solution N or P channel MOSFETs QSOP16 package Fixed 3.3, 5V and adjustable outputs Programmable soft start APPLICATIONS • • • • • • • High efficiency 5 to 3.3V converters up to 4A Sub-notebook computers Embedded processor power supply Distributed power supply Portable instruments Local on card conversion GPS systems Very high efficiency SimpleSyncTM converter. VCC 4.5-10V D2 BAT54 IC1 R1 100k 9 Shut Down C5 13 VIN LBSET ZXM64N02X Bootstrap N1 C10 VDRIVE 2 SHDN L1 15µH 1µF C11 1µF 1 1µF Low input flag 11 LBF RSENSE+ 7 14 10 6 5 RSENSE - 8 Delay Decoup VINT CT GND CIN 68µF C1 1µF C2 330pF 4 1µF C4 VFB 16 Comp 15 PWR GND R6 10k C6 1µF C8 D1 D3 BAT54 N2 ZXM64N02X R3 3k ISSUE 4 - OCTOBER 2000 Cx2 0.01µF COUT Fx RX R2 CX1 2k7 680R 0.022µF R4 10k 3 C7 22µF 1µF C3 VOUT 3.3V 4A RSENSE 0.01R 1 2.2µF ZHCS1000 R5 6k x2 680µF C9 1µF 120µF ZXRD1000 SERIES ABSOLUTE MAXIMUM RATINGS Input without bootstrap (P suffix) Input with bootstrap(N suffix) Bootstrap voltage 20V Shutdown pin VIN LBSET pin VIN 20V 10V RSENSE+, RSENSE Power dissipation Operating temperature Storage temperature VIN 610mW (Note 4) -40 to +85°C -55 to +125°C ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C Symbol Parameter Conditions Min V IN(min) Min. Operating Voltage No Output Device 4.5 V FB (Note 1) Feedback Voltage V IN =5V,I FB =1mA 4.5