This is information on a product in full production.
April 2014 DocID7362 Rev 17 1/18
LK112
Low noise and low drop voltage regulator with shutdown function
Datasheet
-
production data
Features
• Output current up to 150 mA
• Low-dropout voltage (350 mV at I
OUT
= 150
mA)
• Very low quiescent current:
– 0.1 µA in OFF mode and max. 250 µA in
ON mode at I
OUT
= 0 mA
• Low output noise:
– typ. 30 µV at I
OUT
= 60 mA and 10 Hz < f <
80 kHz
• Wide range of output voltages
• Internal current and thermal limit
• Operative input voltage from:
–V
OUT
+ 0.5 to 14 V (for V
OUT
> 2 V) or from
2.5 V to 14 V (for V
OUT
< 2 V)
Description
The LK112 is a low-dropout linear regulator with a
built-in electronic switch. The internal switch can
be controlled by TTL or CMOS logic levels. The
device is on-state when the control pin is pulled to
a logic high level. An external capacitor can be
connected to the noise bypass pin to reduce the
output noise level to 30 µVrms. An internal PNP
pass transistor is used to achieve a low-dropout
voltage. The LK112 has a very low quiescent
current in on mode while in off mode I
q
is reduced
below 100 nA max. The internal thermal
shutdown circuitry limits the junction temperature
below 150 °C. Load current is internally monitored
and the device shuts down in the presence of a
short-circuit or overcurrent condition on the
output.
Table 1. Device summary
Order codes Output voltages
LK112M15TR 1.5V
LK112M18TR 1.8V
LK112M25TR 2.5V
LK112M33TR 3.3V
LK112M50TR 5.0V
LK112M55TR 5.5V
LK112M60TR 6.0V
LK112M80TR 8.0V
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