LTC1326/LTC1326-2.5 Micropower Precision Triple Supply Monitors FEATURES DESCRIPTIO Simultaneously Monitors Three Supplies The LTC 1326/LTC1326-2.5 are triple supply monitors LTC1326: 5V, 3.3V and ADJ intended for systems with multiple supply voltages. They LTC1326-2.5: 2.5V, 3.3V and ADJ provide micropower operation, small size and high accu- Guaranteed Threshold Accuracy: 0.75% racy supply monitoring. Low Supply Current: 20A Tight 0.75% threshold accuracy and glitch immunity Internal Reset Time Delay: 200ms ensure reliable reset operation without false triggering. Manual Push-Button Reset Input The 20A typical supply current makes the LTC1326/ Active Low and Active High Reset Outputs LTC1326-2.5 ideal for power-conscious systems. Active Low Soft Reset Output The RST output is guaranteed to be in the correct state for Power Supply Glitch Immunity V ,V or V down to 1V. The LTC1326/LTC1326-2.5 Guaranteed RESET for V 1V or V 1V CC3 CC5 CC25 CC3 CC5 can be configured to monitor one, two or three inputs, or V 1V CC25 depending on system requirements. 8-Pin SO and MSOP Packages A manual push-button reset input provides the ability to U generate a very narrow soft reset pulse (100s typ) or a APPLICATIO S 200ms reset pulse equivalent to a power-on reset. Both SRST and RST outputs are open-drain and can be OR-tied Desktop Computers Notebook Computers with other reset sources. Intelligent Instruments , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Portable Battery-Powered Equipment Protected by U.S. Patents, including 4843302. TYPICAL APPLICATIO RST Output Voltage vs Supply Voltage (LTC1326-2.5) 2.5V 3.5 3.3V V = V = V DC/DC SYSTEM CC25 CCA CC3 CONVERTER LOGIC V 3.0 4.7k PULL-UP FROM RST TO V CORE CC3 T = 25C A 2.5 0.1F 2.0 1.5 V V V CC25 CC3 CCA 1.0 LTC1326-2.5 0.5 RST 0 PBR SRST GND 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 PUSH-BUTTON V (V) CC3 RESET 1326/2.5 TA02 1326/2.5 TA01 132625fc 1 RST OUTPUT VOLTAGE (V) U ULTC1326/LTC1326-2.5 (Notes 1, 2) ABSOLUTEXAI U RATI GS Terminal Voltage Operating Temperature Range V , V , V , V ......................... 0.5V to 7V CC3 CC5 CC25 CCA LTC1326C/LTC1326C-2.5....................... 0C to 70C RST, SRST ............................................ 0.5V to 7V LTC1326I/LTC1326I-2.5 ..................... 40C to 85C RST ...................................... 0.5V to (V + 0.3V) CC3 Storage Temperature Range ................ 65C to 150C PBR .......................................................... 7V to 7V Lead Temperature (Soldering, 10 sec)................. 300C / PACKAGE ORDER I FOR ATIO TOP VIEW TOP VIEW V 1 8 PBR CC3 V 1 8 PBR CC3 V 2 7 SRST V 2 7 SRST CC5 CC5 V 3 6 RST CCA V 3 6 RST CCA GND 4 5 RST GND 4 5 RST MS8 PACKAGE 8-LEAD PLASTIC MSOP S8 PACKAGE T = 125C, = 250C/W JMAX JA 8-LEAD PLASTIC SO T = 125C, = 150C/W JMAX JA ORDER PART NUMBER MS8 PART NUMBER ORDER PART NUMBER S8 PART NUMBER LTBA LTC1326CS8 1326 LTC1326CMS8 LTUH LTC1326IS8 1326I LTC1326IMS8 TOP VIEW TOP VIEW V 1 8 PBR CC3 V 1 8 PBR CC3 V 2 7 SRST V 2 7 SRST CC25 CC25 V 3 6 RST CCA V 3 6 RST CCA GND 4 5 RST GND 4 5 RST MS8 PACKAGE 8-LEAD PLASTIC MSOP S8 PACKAGE T = 125C, = 250C/W JMAX JA 8-LEAD PLASTIC SO T = 125C, = 150C/W JMAX JA ORDER PART NUMBER MS8 PART NUMBER ORDER PART NUMBER S8 PART NUMBER LTC1326CMS8-2.5 LTEK LTC1326CS8-2.5 132625 LTC1326IMS8-2.5 LTUJ LTC1326IS8-2.5 326I25 Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: