?5v 600ma or 12v 120ma available from 200 μa quiescent current Logic control off 15μa Load Transient Response 8-Lead SO or PDIP Operation with supply voltage up to 2 V

The LT?1302/LT1302-5 are micropower step-up DC/DC converters that maintain high efficiency over a wide range of output currents. They operate down to 2V and feature automatic switching between burst mode at light loads and current mode at heavy loads. Internal low-loss NPN power switches can handle currents in excess of 2A and switch frequencies up to 400kHz. The quiescent current is only 200µA, which can be further reduced to 15µA off. Available in 8-pin PDIP or 8-pin SO packages, the LT1302/LT1302-5 has the highest switching current rating of any similarly packaged switching regulator on the market today. Symbol Parameter Conditions Min TYP Max Unit IQ Quiescent Current VSHDN = 0.5V, VFB = 1.3 V 200 300µA VSHDN = 1.8 V 15 25µA VIN Input Voltage Range 2.0 V 2.2 Feedback Voltage After 8 V (LT1302) VC = 0.4 V 1.22 1.24 1.26 V Feedback Pin Bias Current (LT1302) VFB = 100 nA V Output Voltage (LT1302-5) VC = 0.4 V Sensing 4.85 5.05 5.25 V Output Ripple Voltage (LT1302-5) VC = 0.4 V 50 mV sense pin resists ground (LT1302-5) 420 kΩ VOS compensation voltage see block diagram 15 mV comparator hysteresis (note 1) 5 mV oscillator frequency current limit cannot be asserted (note 2) 175 220 265 kHz 160 310 kHz DC Maximum duty cycle 75 86 t 95% on-time switching Current limit disclaimer 3.9 μs Rich man off time 0.7 μs Output line regulation 2 < VIN < 8 V 0.06 - 0.15%_/ V VCESAT switch saturation voltage ISW = 2 310 400 mV 475 mV Switch Leakage Current Very Short Wave = 5 V, off 10 μA Switch Current Limit VC 0.1 = 0.4 V (Burst Mode Operation) 1 A VC = 1.25 V (Full Power) (Note 3) 2.0 2.8 3.9 0.9 Error Amplifier Voltage Gain V≤VC≤1.2 V, ?VC/?VFB 50 75 V/V VSHDNH Shutdown Pin High 1.8 V VSHDNL Shutdown Pin 0.5 V Low ISHDN Shutdown Pin Bias Current VSHDN = 5 V 8 20µSHDN = 2 V 3 μA VSHDN = 0 V 0.1 - 1 μA ground 3.9 kΩ pin resistance