DATASHEET ISL21440 FN6532 Rev. 6.00 Micropower Voltage Reference with Comparator Mar 12, 2018 The ISL21440 is a micropower, FGA reference, and comparator Features on a single chip. Drawing less than 6.5A supply current 6.5A supply current across the full temperature range across the full operating temperature range, the ISL21440 operates from a single 2V to 11V supply and can also be used Wide supply range . 2V to 11V with split bipolar supplies. Precision 1.182V 0.5% voltage reference The ISL21440s on-board reference provides a 1.182V 0.5% Comparator with user programmable hysteresis output. It features programmable hysteresis and TTL/CMOS Temperature range -40C to +125C compatible outputs that sink and source current. Low bias currents permit high value divider resistors for typical circuit 8 Ld MSOP and 8 Ld TDFN packages current drains of <2.5A. Pin compatible upgrade to MAX921 and LTC1440 The low supply current makes the ISL21440 ideal for battery Applications powered devices in battery level or low voltage monitor circuits. Low battery detector The ISL21440 is a pin-compatible, performance upgrade of Low voltage reset the LTC1440, LTC1540, MAX921, and MAX931. Overvoltage monitor Related Literature Window comparator For a full list of related documents, visit our website ISL21440 product page V DD V BAT 1.190 V+ = 3V 1.188 V+ 2.4M IN+ 1.186 Lo BAT- + OUT V+ = 5V 1.184 IN- - 1.182 1.8M HYST 1.180 ISL21440 20k REF 1.178 V+ = 2V 1.176 2.4M V- GND 1.174 1.172 -40 -20 0 20 40 60 80 100 120 LOW BATTERY DETECTOR TEMPERATURE (C) FIGURE 1. TYPICAL APPLICATION FIGURE 2. REFERENCE VOLTAGE vs TEMPERATURE FN6532 Rev. 6.00 Page 1 of 15 Mar 12, 2018 V (V) REFISL21440 Block Diagram V+ IN+ + OUT IN- - HYST ISL21440 REF V- GND FIGURE 3. BLOCK DIAGRAM Pin Configuration Pin Descriptions ISL21440 PIN SYMBOL DESCRIPTION (8 LD MSOP, 8 LD TDFN) TOP VIEW 1 GND Ground pin. Sets the comparator output low level. 2 V- Negative supply input for voltage reference and OUT GND comparator. 1 8 3 IN+ Comparator noninverting input pin. Range: V- to V- 2 7 V+ V+ -1.5V. 3 6 IN+ REF 4 IN- Comparator inverting input pin. Range: V- to V+ -1.5V. IN- 4 5 HYST 5 HYST Comparator hysteresis input. Accepts a voltage divided from the reference output. Range is V - 50mV to REF V . Connect directly to V for zero hysteresis. REF REF 6 REF Reference output. Source 2mA and Sink 10A. 7 V+ Positive supply input for comparator and reference. Range is 2.0V to 11.0V 8 OUT Comparator output, CMOS push-pull. Output swing referenced to V+ and GND. Ordering Information PART NUMBER V RANGE TEMP RANGE TAPE and REEL PACKAGE PKG. DD (Notes 2, 3)PART MARKING (V) (C) (UNITS) (RoHS COMPLIANT) DWG. ISL21440IRTZ 1440 2 to 11 -40 to +125 - 8 Ld TDFN L8.3x3G ISL21440IRTZ-T13 (Note 1) 1440 2 to 11 -40 to +125 6k 8 Ld TDFN L8.3x3G ISL21440IUZ 1440Z 2 to 11 -40 to +125 - 8 Ld MSOP M8.118 ISL21440IUZ-T13 (Note 1) 1440Z 2 to 11 -40 to +125 2.5k 8 Ld MSOP M8.118 NOTES: 1. Refer to TB347 for details about reel specifications. 2. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), see the ISL21440 product information page. For more information about MSL, see TB363. FN6532 Rev. 6.00 Page 2 of 15 Mar 12, 2018