MAX16033MAX16040 19-0882 Rev 0 7/07 Low-Power Battery Backup Circuits in Small DFN Packages General Description Features Low 1.2V Operating Supply Voltage The MAX16033MAX16040 supervisory circuits reduce the complexity and number of components required for Precision Monitoring of 5.0V, 3.3V, 3.0V, and 2.5V power-supply monitoring and battery control functions Power-Supply Voltages in microprocessor (P) systems. The devices signifi- Independent Power-Fail Comparator cantly improve system reliability and accuracy com- Debounced Manual-Reset Input pared to other ICs or discrete components. The Watchdog Timer, 1.6s Timeout MAX16033MAX16040 provide P reset, backup-bat- tery switchover, power-fail warning, watchdog, and Battery-On Output Indicator chip-enable gating features. Auxiliary User-Adjustable RESETIN The MAX16033MAX16040 operate from supply volt- Low 13A Quiescent Supply Current ages up to 5.5V. The factory-set reset threshold voltage Two Available Output Structures: ranges from 2.32V to 4.63V. The devices feature a man- Active-Low Push-Pull Reset ual-reset input (MAX16033/MAX16037), a watchdog Active-Low Open-Drain Reset timer input (MAX16034/MAX16038), a battery-on output Active-Low Reset Valid Down to 1.2V (MAX16035/MAX16039), an auxiliary adjustable reset input (MAX16036/MAX16040), and chip-enable gating Power-Supply Transient Immunity (MAX16033MAX16036). Each device includes a 140ms (min) Reset Timeout Period power-fail comparator and offers an active-low push- Small 2mm x 2mm, 8-Pin and 10-Pin DFN pull reset or an active-low open-drain reset. Packages The MAX16033MAX16040 are available in 2mm x 2mm, 8-pin or 10-pin DFN packages and are fully Ordering Information specified from -40C to +85C. PIN- PKG PART* TEMP RANGE Applications PACKAGE CODE MAX16033LLB +T -40C to +85C 10 DFN-10 L1022-1 Portable/Battery- Controllers MAX16033PLB +T -40C to +85C 10 DFN-10 L1022-1 Powered Equipment Computers MAX16034LLB +T -40C to +85C 10 DFN-10 L1022-1 POS Equipment Fax Machines MAX16034PLB +T -40C to +85C 10 DFN-10 L1022-1 Critical P/C Power Industrial Control Ordering Information continued on last page. Monitoring Real-Time Clocks *These parts offer a choice of reset threshold voltages. From the Set-Top Boxes Reset Threshold Ranges table, insert the desired threshold volt- Intelligent Instrument age code in the blank to complete the part number. See Selector Guide for a listing of device features. +Denotes a lead-free package. Pin Configurations and Typical Operating Circuit appear at T = Tape and reel. end of data sheet. Selector Guide PART MR WATCHDOG BATTON RESETIN CEIN/CEOUT PFI, PFO PIN-PACKAGE MAX16033 10 DFN-10 MAX16034 10 DFN-10 MAX16035 10 DFN-10 MAX16036 10 DFN-10 MAX16037 8 DFN-8 MAX16038 8 DFN-8 MAX16039 8 DFN-8 MAX16040 8 DFN-8 Note: Replace with L for push-pull or P for open-drain RESET and PFO outputs. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Low-Power Battery Backup Circuits in Small DFN Packages ABSOLUTE MAXIMUM RATINGS Terminal Voltages (with respect to GND) Output Current V BATT, OUT.......................................................-0.3V to +6V OUT ..................................Short-Circuit Protected for up to 5s CC, RESET (open drain), PFO (open drain)....................-0.3V to +6V RESET, BATTON.............................................................20mA RESET (push-pull), PFO (push-pull), BATTON, RESETIN, WDI Continuous Power Dissipation (T = +70C) A MR, CEIN, CEOUT, PFI ............................-0.3V to (V + 0.3V) 8-Pin DFN (derate 4.8mW/C above +70C) ..........380.6mW OUT Input Current 10-Pin DFN (derate 5mW/C above +70C) ...........402.8mW V Peak..............................................................................1A Operating Temperature Range ...........................-40C to +85C CC V Continuous ............................................................250mA Storage Temperature Range .............................-65C to +150C CC BATT Peak ....................................................................250mA Lead Temperature (soldering, 10s) .................................+300C BATT Continuous ............................................................40mA GND ................................................................................75mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 2.25V to 5.5V, V = 3V, RESET not asserted, T = -40C to +85C, unless otherwise noted. Typical values are at T = CC BATT A A +25C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range V , V No load (Note 2) 0 5.5 V CC BATT V = 2.8V 13 30 CC Supply Current I No load, V > V V = 3.6V 16 35 A CC CC TH CC V = 5.5V 22 50 CC V = 2.8V, BATT T = +25C 1 A Supply Current in Battery V = 0V, A CC Backup Mode T = -40C to +85C 2 A excluding I OUT T = +25C -0.1 +0.02 (V + 0.2V) < V A BATT CC BATT Standby Current (Note 3) I A BATT < 5.5V T = -40C to +85C -0.3 +0.02 A V = 4.75V, V > V , I = 150mA 3.1 CC CC TH OUT V to OUT On-Resistance R V = 3.15V, V > V , I = 65mA 3.7 CC ON CC CC TH OUT V = 2.5V, V > V , I = 25mA 4.6 CC CC TH OUT V BATT V = 4.50V, V = 0V, I = 20mA BATT CC OUT - 0.2 Output Voltage in Battery V BATT V V = 3.15V, V = 0V, I = 10mA V OUT BATT CC OUT Backup Mode - 0.15 V BATT V = 2.5V, V = 0V, I = 5mA BATT CC OUT - 0.15 V rising 0 CC Battery-Switchover Threshold V V - V , V < V mV SW CC BATT CC TH V falling -40 CC 2 MAX16033MAX16040