MAX6023EBTxx Rev. A RELIABILITY REPORT FOR MAX6023EBTxx CHIP SCALE DEVICES July 17, 2003 MAXIM INTEGRATED PRODUCTS 120 SAN GABRIEL DR. SUNNYVALE, CA 94086 Written by Reviewed by Jim Pedicord Quality Assurance Reliability Lab Manager Bryan J. Preeshl Quality Assurance Executive Director Conclusion The MAX6023 successfully meets the quality and reliability standards required of all Maxim products. In addition, Maxim’s continuous reliability monitoring program ensures that all outgoing product will continue to meet Maxim’s quality and reliability standards. Table of Contents I. ........Device Description II. ........Manufacturing Information III. .......Packaging Information IV. .......Die Information V. ........Quality Assurance Information VI. .......Reliability Evaluation ......Attachments I. Device Description A. General The MAX6023 is a family of low-dropout, micropower voltage references in a 5-bump, chip-scale package (UCSP™). The MAX6023 series-mode (three-terminal) references, which operate with input voltages from 2.5V to 12.6V (1.25V and 2.048V options) or (V OUT + 0.2V) to 12.6V (all other voltage options), are available with output voltage options of 1.25V, 2.048V, 2.5V, 3.0V, 4.096V, 4.5V, and 5.0V. These devices are guaranteed an initial accuracy of ±0.2% and 30ppm/°C temperature drift over the -40°C to +85°C extended temperature range. UCSPs offer the benefit of moving to smaller footprint and lower profile devices, significantly smaller than even SC70 or SOT23 plastic surface-mount packages. The significantly lower profile (compared to plastic SMD packages) of the UCSP makes the device ideal for height-critical applications. Miniature UCSP packages also enable device placement close to sources and allow more flexibility in a complex or large design layout. The MAX6023 voltage references use only 27µA of supply current. And unlike shunt-mode (two-terminal) references, the supply current of the MAX6023 family varies only 0.8µA/V with supply-voltage changes, translating to longer battery life. Additionally, these internally compensated devices do not require an external compensation capacitor and are stable up to 2.2nF of load capacitance. The low-dropout voltage and the low supply current make these devices ideal for battery-operated systems. B. Absolute Maximum Ratings Item (Voltages Referenced to GND) IN OUT Output Short Circuit to GND or IN (VIN < 6V) Output Short Circuit to GND or IN (VIN = 6V) Operating Temperature Range Storage Temperature Range Bump Temperature (soldering, 10s) Continuous Power Dissipation 5-Bump UCSP Derates above +70°C 5-Bump UCSP Rating -0.3V to +13.5V -0.3V to (VIN + 0.3V) Continuous 60s -40°C to +85°C -65°C to +150°C +300°C 273mW 2.4mW/°C Note 1: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. This limit permits only the use of solder profiles recommended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is required. Hand or wave soldering is not allowed. II. Manufacturing Information A. Description/Function: Precision, Low-Power, Low-Dropout, UCSP Voltage Reference B. Process: S12 (Standard 1.2 micron silicon gate CMOS) C. Number of Device Transistors: 70 D. Fabrication Location: Oregon, USA E. Assembly Location: Philippines or USA F. Date of Initial Production: January, 2001 III. Packaging Information A. Package Type: 5-Bump UCSP B. Lead Frame: N/A C. Lead Finish: N/A D. Die Attach: N/A E. Bondwire: N/A F. Mold Material: N/A G. Assembly Diagram: # 05-0901-0164 H. Flammability Rating: Class UL94-V0 I. Classification of Moisture Sensitivity per JEDEC standard JESD22-112: Level 1 IV. Die Information A. Dimensions: 63 x 43 mils B. Passivation: SiN/SiO (nitride/oxide) C. Interconnect: Aluminum/Si (Si = 1%) D. Backside Metallization: None E. Minimum Metal Width: 1.2 microns (as drawn) F. Minimum Metal Spacing: 1.2 microns (as drawn) G. Bondpad Dimensions: 5 mil. Sq. H. Isolation Dielectric: SiO2 I. Die Separation Method: Wafer Saw V. Quality Assurance Information A. Quality Assurance Contacts: B. Outgoing Inspection Level: Jim Pedicord (Manager, Reliability Operations) Bryan Preeshl (Executive Director) Kenneth Huening (Vice President) 0.1% for all electrical parameters guaranteed by the Datasheet. 0.1% For all Visual Defects. C. Observed Outgoing Defect Rate: < 50 ppm D. Sampling Plan: Mil-Std-105D VI. Reliability Evaluation A. Accelerated Life Test The results of the 135°C biased (static) life test are shown in Table 1. Using these results, the Failure Rate (λ) is calculated as follows: λ= 1 = MTTF 1.83 192 x 4389 x 57 x 2 (Chi square value for MTTF upper limit) Temperature Acceleration factor assuming an activation energy of 0.8eV λ = 19.05 x 10-9 λ = 19.05 F.I.T. (60% confidence level @ 25°C) This low failure rate represents data collected from Maxim’s reliability monitor program. In addition to routine production Burn-In, Maxim pulls a sample from every fabrication process three times per week and subjects it to an extended Burn-In prior to shipment to ensure its reliability. The reliability control level for each lot to be shipped as standard product is 59 F.I.T. at a 60% confidence level, which equates to 3 failures in an 80 piece sample. Maxim performs failure analysis on any lot that exceeds this reliability control level. Attached Burn-In Schematic (Spec. # 06-5114) shows the static Burn-In circuit. Maxim also performs quarterly 1000 hour life test monitors. This data is published in the Product Reliability Report (RR-1M). B. Moisture Resistance Tests Maxim pulls pressure pot samples from every assembly process three times per week. Each lot sample must meet an LTPD = 20 or less before shipment as standard product. Additionally, the industry standard 85°C/85%RH testing is done per generic device/package family once a quarter. C. E.S.D. and Latch-Up Testing The RF39 die type has been found to have all pins able to withstand a transient pulse of ±1500V, per MilStd-883 Method 3015 (reference attached ESD Test Circuit). Latch-Up testing has shown that this device withstands a current of ±250mA. Table 1 Reliability Evaluation Test Results MAX6034EBTxx TEST ITEM TEST CONDITION Static Life Test (Note 1) Ta = 135°C Biased Time = 192 hrs. FAILURE IDENTIFICATION PACKAGE DC Parameters & functionality SAMPLE SIZE NUMBER OF FAILURES 77 0 77 0 N/A N/A 77 77 0 0 Moisture Testing (Note 2) Pressure Pot Ta = 121°C P = 15 psi. RH= 100% Time = 168hrs. DC Parameters & functionality 85/85 Ta = 85°C RH = 85% Biased Time = 1000hrs. DC Parameters & functionality UCSP Mechanical Stress (Note 2) Temperature Cycle -40°C/125°C 1000 Cycles Slow Ramp (Note 3) DC Parameters QFN UCSP Note 1: Life Test Data may represent plastic DIP qualification lots. Note 2: Generic Package/Process data Note 3: UCSP Temperature Cycle performed at with a ramp rate of 11°C/minute, dwell=15 minutes, one cycle/hour Attachment #1 TABLE II. Pin combination to be tested. 1/ 2/ Terminal A (Each pin individually connected to terminal A with the other floating) Terminal B (The common combination of all like-named pins connected to terminal B) 1. All pins except VPS1 3/ All VPS1 pins 2. All input and output pins All other input-output pins 1/ Table II is restated in narrative form in 3.4 below. 2/ No connects are not to be tested. 3/ Repeat pin combination I for each named Power supply and for ground (e.g., where VPS1 is VDD, VCC, VSS, VBB, GND, +VS, -VS, VREF, etc). 3.4 Pin combinations to be tested. a. Each pin individually connected to terminal A with respect to the device ground pin(s) connected to terminal B. All pins except the one being tested and the ground pin(s) shall be open. b. Each pin individually connected to terminal A with respect to each different set of a combination of all named power supply pins (e.g., VSS1, or VSS2 or VSS3 or VCC1 , or VCC2 ) connected to terminal B. All pins except the one being tested and the power supply pin or set of pins shall be open. c. Each input and each output individually connected to terminal A with respect to a combination of all the other input and output pins connected to terminal B. All pins except the input or output pin being tested and the combination of all the other input and output pins shall be open. TERMINAL C R1 R2 S1 TERMINAL A REGULATED HIGH VOLTAGE SUPPLY S2 C1 DUT SOCKET SHORT TERMINAL B TERMINAL D Mil Std 883D Method 3015.7 Notice 8 R = 1.5kΩ C = 100pf CURRENT PROBE (NOTE 6) PART MARKING ORIENTATION IN REFERENCE TO WAFER FLAT (MARK IS ON WAFER BACKSIDE) ONCE PER BOARD ONCE PER SOCKET 1 8 - SOIC 100 OHMS 2 7 3 6 4 5 1 uF DEVICES: MAX 6023/6012/6021/6025/6041/6045/ 6050/6120/6125/6141/6145/6150/6160/6520 MAX. EXPECTED CURRENT = 60uA DOCUMENT I.D. 06-5114 REVISION C +10V 8 100 uF DRAWN BY: HAK TAN NOTES: MAXIM TITLE: BI Circuit (MAX6012/6021/6025/6041/6045/6050/6120/6125/6141/6145/6150/6160/6520/6023) PAGE 2 OF 3