LTC2915/LTC2916
1
29156fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Voltage Supervisor with
27 Selectable Thresholds
The LTC
®
2915/LTC2916 are low voltage single-supply
monitors with selectable thresholds. The parts operate
from 1.5V to 5.5V and consume a quiescent current of
only 30μA.
Two three-state inputs select one of nine internally pro-
grammed thresholds without the need for external resistors.
For the LTC2915, an additional three-state input determines
the tolerance (–5%, –10%, –15%). The tolerance for the
LTC2916 is fi xed at –5%. Threshold accuracy is guaranteed
at ±1.5% over the entire operating temperature range.
Glitch fi ltering ensures reliable reset operation without
false triggering.
The reset timeout may be set to 200ms or adjusted using
an external capacitor. A separate manual reset input on the
LTC2916 allows a simple push button interface.
Operation to 125°C makes the LTC2915 and LTC2916
suitable for automotive applications.
1.8V, –5% Tolerance Supply Monitor
n
9 Selectable Supply Voltages
12V, 5V, 3.3V, 2.5V, 1.8V
1.5V, 1.2V, 1.0V, +ADJ (0.5V)
n
3 Selectable Tolerances
–5%, –10%, –15% (LTC2915)
n
Manual Reset Input (LTC2916)
n
1.5V to 5.5V Supply Operation
n
6.2V Shunt Regulator for High Voltage Operation
n
Guaranteed Operation to 125˚C
n
Guaranteed Threshold Accuracy: ±1.5%
n
Low Quiescent Current: 30μA Typical
n
Power Supply Glitch Immunity
n
Guaranteed RST for V
CC
≥ 0.8V
n
Low Profi le (1mm) 8-Lead TSOT-23 (ThinSOT
TM
) and
(3mm × 2mm) DFN Packages
n
Handheld Devices
n
Cell Phone Base Stations
n
Automotive Control Systems
n
Network Servers
n
Optical Networking Systems
NOMINAL VOLTAGE SEL1 SEL2
12V V
CC
V
CC
5V V
CC
Open
3.3V V
CC
GND
2.5V Open V
CC
1.8V Open Open
1.5V Open GND
1.2V GND V
CC
1V GND Open
ADJ (0.5V) GND GND
Monitor Selection Table
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
1.8V
10k
29156 TA01
VM
t
RST
= 200ms
RT SEL1
SEL2
MR
GND
V
CC
V
CC
LTC2916
μP
RST RESET
0.1μF