NTLUF4189NZ diode equivalent, single n-channel 30 v mosfet plus schottky barrier diode.
http://onsemi.com MOSFET
V(BR)DSS 30 V RDS(on) MAX 250 mW @ 4.5 V 350 mW @ 3.0 V 425 mW @ 2.5 V 1.4 A ID MAX
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Low Qg and Capacitance to Minimize.
* DC-DC Boost Converter
* Color Display and Camera Flash Regulators
* Optimized for Power Management Applic.
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