NCP1423, SCV1423 Boost Converter Sync-Rect, PFM, DC-DC, True-Cutoff, Ring-Killer 400 mA NCP1423 is a monolithic micropower high frequency stepup switching converter IC specially designed for battery operated hand NCP1423, SCV1423 ON OFF 100k Low battery open drain output C1 * EN LBO R3 REF LBI R1 0.2 F ON Low battery FB ADEN R2 OFF R4 sense input GND LX 5.6 H OUT BAT 22 F 10 F NCP1423, SCV1423 C C OUT IN * Optional Figure 1. Typical Operation Circuit PIN DESCRIPTION Pin No. Symbol Description 1 EN LowBattery Detector Input and Enable. With this pin pulled down below 0.5 V, the device will be disabled and will enter shutdown mode 2 REF 1.195 V Reference Voltage Output, bypass with 0.1 F capacitor if this pin is not loaded, with a 1.0 F bypassing capacitor, this pin can be loaded up to 2.5 mA V = 3.3 V. OUT 3 FB Output Voltage Feedback Input 4 GND Ground 5 OUT Power Output. OUT provides bootstrap power to the IC 6 BAT Battery supply input pin and connection for internal Ring Killer 7 LX NChannel and PChannel Power MOSFET Drain 8 ADEN Auto Discharge Input 9 LBI LowBattery Detector Input 10 LBO OpenDrain LowBattery Detector Output. Output is Low when V is < 500 mV. LBI LBO is high impedance shutdown MAXIMUM RATINGS Rating Symbol Value Unit Power Supply (Pin 6) V 0.3, 6.0 V OUT Input / Output Pins (Pins 13,5,710) V 0.3, 6.0 V IO Thermal Characteristics Micro10 Plastic Package, Case 846B, T = 25C P 480 mW A D Thermal Resistance JunctiontoAir R 250 C/W JA Operating Junction Temperature Range T 40 to + 150 C J Operating Ambient Temperature Range T 40 to + 85 C A Storage Temperature Range T 55 to +150 C stg Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. NOTE: ESD data available upon request. 1. This device contains ESD protection and exceeds the following tests: Human Body Model (HBM) 2.0 kV per JEDEC standard: JESD22 A114. Machine Model (MM) 200 V per JEDEC standard: JESD22 A115. 2. The maximum package power dissipation limit must not be exceeded. T T J(max) A P D R JA 3. Latchup Current Maximum Rating: 150 mA per JEDEC standard: JESD78. 4. Moisture Sensitivity Level: MSL 1 per IPC/JEDEC standard: JSTD020A. 5. Measured on approximately 1 in sq of 1 oz Cu.