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Inverting 1.2MHz/2.7MHz DC/DC Converters with Integrated Schottky
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LT3462/LT3462A
Inverting 1.2MHz/2.7MHz
DC/DC Converters with
Integrated Schottky
DESCRIPTION FEATURES
Integrated Schottky Rectifier
nn Fixed Frequency 1.2MHz/2.7MHz Operation
nn Very Low Noise: 1mV
P-P Output Ripple
nn Low V
CESAT Switch: 270mV at 250mA
nn –5V at 100mA from 5V Input
nn –12V at 30mA from 3.3V Input
nn Low Input Bias Current GND Based FB Input
nn Low Impedance (40Ω) 1.265V Reference Output
nn High Output Voltage: Up to – 38V
nn Wide Input Range: 2.5V to 16V
nn Uses Tiny Surface Mount Components
nn Low Shutdown Current: ISDREF ≥ –80µA ● 1.245 FB Pin Bias Current (Note 2)
10µA > ISDREF ≥ –80µA ● 1.235 SDREF Reference Source Current SDREF >1.2V ● 120 Supply Current FB = –0.05V, Not Switching
SDREF = 0V, FB = Open, VIN = 5V SDREF Minus FB Voltage UNITS 2.5 Maximum Operating Voltage
SDREF Voltage MAX Error Amp Offset Voltage 1.265 1.285 V 15 50 nA 1.263 1.285 V –12 12
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