RH1185AMK
Negative Regulator with
Adjustable Current Limit
DESCRIPTION ABSOLUTE MAXIMUM RATINGS The RH1185AMK is a 3A low dropout regulator with adjustable current limit and remote sense capability. It can
be used as a positive regulator with floating input or as
a standard negative regulator with grounded input. The
output voltage range is 2.5V to 25V, with ±1% accuracy
on the internal reference voltage. (Note 1) The RH1185AMK uses a saturation-limited NPN transistor
as the pass element. This structure gives the linear dropout
characteristics of a FET pass element with significantly less
die area. High efficiency is maintained by using special
anti-saturation circuitry that adjusts base drive to track
load current.
The on-resistance is typically 0.25Ω. Accurate current
limit is programmed with a single 1/8W external resistor,
with a range of zero to three amperes. A second, fixed
internal limit circuit prevents destructive currents if the
programming current is accidentally overranged.
The RH1185AMK has all the protection features of previous LTC regulators, including power limiting and thermal
shutdown. BURN-IN CIRCUIT GND 4.02k
3
GND L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners. PACKAGE INFORMATION 15V 1 Input Voltage.35V …