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TPS61042

SLVS441B — DECEMBER 2002 — REVISED JANUARY 2003

UNDERVOLTAGE LOCKOUT

An undervoltage lockout feature prevents mis-operation of the device at input voltages below 1.5 V (typ). As long

as the input voltage is below the undervoltage threshold the device remains off, with the main MOSFET switch

(Q1) and the LED switch (Q2) open.

THERMAL SHUTDOWN

An internal thermal shutdown is implemented in the TPS61042 that shuts down the device if the typical junction

temperature of 160

°C is exceeded. If the device is in thermal shutdown mode, the main MOSFET switch (Q1)

and the LED switch (Q2) are open.

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