500mA Negative Micropower LDO Offers New High Reliability Grade Operating Down to -55°C

News Release  www.linear.com
500mA Negative Micropower LDO Offers
New High Reliability Grade Operating Down to -55°C
MILPITAS, CA – August 18, 2010 – Linear Technology Corporation announces a new high
reliability, military plastic MP-grade version of the LT1175, a 500mA negative micropower low
dropout regulator. The MP-grade LT1175 is offered in SOIC-8 and DD-Pak packages with a
-55°C to +125°C operating junction temperature range. With a wide input voltage range of
-4.3V to -20V, the LT1175 features micropower operating currents of 45uA quiescent and 10uA
in shutdown, preventing output voltage rise under no-load conditions. The device’s reference
amplifier topology ensures precision DC characteristics and the ability to maintain good loop
stability with a wide range of output capacitors. The device’s power transistor
anti-saturation design enables very low dropout voltage of 500mV (typical at full load). Fixed 5V
and adjustable (-3.8V to -19.5V) output voltage versions are available.
Several features make the LT1175 very user-friendly. The SHDN pin can interface
directly to either positive or negative logic levels. Unlike prior regulators, the increase in
quiescent current during a dropout condition is actively limited. The LT1175 offers complete
protection including user-selectable current limit at 200mA, 400mA, 600mA and 800mA, power
limiting (current limit foldback), thermal shutdown and the ability to force the output to reverse
voltage without damage or latchup.
In addition to the SOIC-8 and power DD-Pak packages, the LT1175 is available in a
3-lead SOT-223, a through-hole power TO-220 package and an 8-pin PDIP package. C-grade
operating junction temperature is 0°C to +125°C, I grade is specified from -40°C to +125°C, and
MP grade is -55°C to +125°C. 1k pricing for the MP grade in DD-Pak is $9.60 and SOIC is
$8.70, and devices are available in stock. For more information, visit www.linear.com/1175.
500mA Negative Micropower LDO Offers
New High Reliability Grade Operating Down to -55°C
page 2
Photo Caption: High Reliability MP Grade Offered for LT1175 500mA Negative LDO
Summary of Features: LT1175
VIN Range: -4.3V to -20V
VOUT Range: -3.8V to -19.5V (Adjustable) & Fixed 5V
Dropout Voltage: 500mV
Output Current: 500mA
Stable with Wide Range of Output Capacitors
Operating Current: 45uA
Shutdown Current: 10uA
Adjustable Current Limit
Positive or Negative Shutdown Logic
Tolerates Reverse Output Voltage
Current Limit with Power Limiting (Foldback) & Thermal Shutdown
SOIC-8, DD-Pak-5, TO-220-5, SOT-223-3, PDIP-8 Packages
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits,
was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major
public companies in 2000. Linear Technology products include high performance amplifiers,
comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery
chargers, data converters, communications interface circuits, RF signal conditioning circuits,
uModule products, and many other analog functions. Applications for Linear Technology’s
high performance circuits include telecommunications, cellular telephones, networking products
such as optical switches, notebook and desktop computers, computer peripherals,
video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer
products such as digital cameras and MP3 players, complex medical devices, automotive
electronics, factory automation, process control, and military and space systems.
LT, LTC, LTM, uModule and
are registered trademarks of Linear Technology Corp. All other trademarks are the
property of their respective owners.
Press Contacts:
North America / Worldwide
UK & Nordic
John Hamburger, Director Marketing
Tel 408-432-1900 ext 2419
Alan Timmins
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
408-432-1900 ext 2233