LTC2915 Datasheet, PDF (1/12 Pages) Linear Technology – Voltage Supervisor with 27 Selectable Thresholds

FEATURES
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 VCC ≥ 0.8V}
n _{Low Profile (1mm) 8-Lead TSOT-23 (ThinSOT}^TM_{) and}
(3mm × 2mm) DFN Packages
APPLICATIONS
n _{Handheld Devices}
n _{Cell Phone Base Stations}
n _{Automotive Control Systems}
n _{Network Servers}
n _{Optical Networking Systems}
LTC2915/LTC2916
Voltage Supervisor with
27 Selectable Thresholds
DESCRIPTION
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 fixed at –5%. Threshold accuracy is guaranteed
at ±1.5% over the entire operating temperature range.
Glitch filtering 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.
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.
TYPICAL APPLICATION
1.8V, –5% Tolerance Supply Monitor
1.8V
0.1μF
V_CC
LTC2916
VM
RST
RT
SEL1
SEL2
MR
GND
10k
t_RST = 200ms
V_CC
μP
RESET
29156 TA01
Monitor Selection Table
NOMINAL VOLTAGE
SEL1
12V
V_CC
5V
V_CC
3.3V
V_CC
2.5V
Open
1.8V
Open
1.5V
Open
1.2V
GND
1V
GND
ADJ (0.5V)
GND
SEL2
V_CC
Open
GND
V_CC
Open
GND
V_CC
Open
GND
29156fa
1