AME, Inc. Voltage Detector AME8550 n General Description The AME8550 series are highly precise, low power consumption voltage detectors, manufactured using CMOS and fuse trimming technologies. Detect voltage is extremely accurate with minimal temperature drift. n Functional Block Diagram (1) CMOS Output without delay VDD VOUT Both CMOS and N channel open drain output configurations are available. VSS Vref BG n Features l Highly accurate: + 2% l Low power consumption: TYP 0.8A (VDD=1.5V) l Detect voltage range: 1.6V to 6.0V in 0.1V increments l Operating voltage range: 1.2V to 6.5V l Detect voltage temperature characteristics: TYP 100ppm/oC l Output configuration: N-channel open drain or CMOS l Ultra small package : SOT-23 (150mW) SOT-25 (150mW) SOT-89 (500mW) SC-70 (100mW) l Add an external capacitor to perform an P reset. (2) Nch Open Drain Output without delay VDD VOUT VSS Vref BG (3) CMOS Output with delay VDD VOUT VDD VSS I VTH=VREF CD Vref BG n Applications l l l l l Microprocessor reset circuitry Memory battery back-up circuits Power-on reset circuits Power failure detection System battery life and charge voltage monitors (4) Nch Open Drain Output with delay VOUT VDD VDD VSS I VTH=VREF CD Vref BG 1 AME, Inc. Voltage Detector AME8550 n Pin Configuration l Without Delay Time SOT-23 Top View SOT-89 Top View 3 AME8550 1 AME8550AEETXXXX 1. VOUT 2. Vss 3. VDD 2 AME8550 1 2 SOT-25 Top View 5 AME8550 2 3 SC70-3 Top View 4 1 AME8550AEFTXXXX 1. VOUT 2. VDD 3. Vss AME8550CEEVXXXX 1. VOUT 2. VDD 3. Vss 4. NC 5. NC 3 AME8550 1 3 AME8550AEITXXXX 1. VSS 2. VOUT 3. VDD 2 l With Delay Time SOT-25 Top View 5 SOT-25 Top View 4 AME8550 1 2 AME8550AEEVXXXX 1. VOUT 2. VDD 3. Vss 4. CD 5. NC 3 5 4 AME8550 1 2 3 n Pin Description Pin Name 2 Pin Description VDD Supply Voltage Input VSS Ground VOUT Output NC No Connection CD Connect an external capacitor when delay function is needed AME8550BEEVXXXX 1. VOUT 2. VDD 3. Vss 4. NC 5. CD AME, Inc. Voltage Detector AME8550 n Ordering Information l Without Delay Time AME8550 x x x x x xxx x Special Feature Detect Voltage Output Options Number of Pins Package Type Operating Temperature Pin Out Configuration Operating Pin Temperature Configuration Range A (SOT-23) A (SOT-89) A (SC70-3) C (SOT-25) Package Type Number of Pins 1. VOUT E: -40OC to 85OC E: SOT-2X T: 3 2. VSS F: SOT-89 V: 5 3. VDD 1. VOUT 2. VDD 3. VSS 1. VSS 2. VOUT 3. VDD 1. 2. 3. 4. 5. VOUT VDD VSS NC NC Output Options Detect Voltage Special Feature A: CMOS output without delay 190: V=1.9V L: Low profile B: Open-Drain output without 200: V=2.0V Y: Lead free & Low profile delay 220: V=2.2V 230: V=2.3V Z: Lead free 240: V=2.4V 250: V=2.5V 263: V=2.63V 270: V=2.7V 280: V=2.8V 360: V=3.6V 370: V=3.7V 420: V=4.2V 440: V=4.4V 460: V=4.6V 3 AME, Inc. Voltage Detector AME8550 n Ordering Information l With Delay Time AME8550 x x x x x xxx x Special Feature Detect Voltage Output Options Number of Pins Package Type Operating Temperature Pin Out Configuration Operating Pin Temperature Configuration Range A (SOT-25) B 4 Package Type Number of Pins 1. 2. 3. 4. 5. VOUT E: -40OC to 85OC E: SOT-2X T: 3 F: SOT-89 V: 5 VDD VSS CD NC 1. 2. 3. 4. 5. VOUT VDD VSS NC CD Output Options C: CMOS output with delay D: Open-Drain output with delay Detect Voltage 190: 200: 220: 230: 240: 250: 263: 270: 280: 360: 370: 420: 440: 460: Special Feature V=1.9V L: Low profile V=2.0V Y: Lead free V=2.2V & Low profile V=2.3V Z: Lead free V=2.4V V=2.5V V=2.63V V=2.7V V=2.8V V=3.6V V=3.7V V=4.2V V=4.4V V=4.6V AME, Inc. Voltage Detector AME8550 n Ordering Information (contd.) Part Number Marking Output Voltage Package Operating Temp. Range AME8550AEEVC190 AXOww 1.9V SOT-25 -40oC to +85oC AME8550AEEVC190L AXOww 1.9V SOT-25 -40oC to +85oC AME8550AEEVC190Z AXOww 1.9V SOT-25 -40oC to +85oC AME8550AEEVC190Y AXOww 1.9V SOT-25 -40oC to +85oC AME8550BEEVC190 AXPww 1.9V SOT-25 -40oC to +85oC AME8550BEEVC190L AXPww 1.9V SOT-25 -40oC to +85oC AME8550BEEVC190Z AXPww 1.9V SOT-25 -40oC to +85oC AME8550BEEVC190Y AXPww 1.9V SOT-25 -40oC to +85oC AME8550AEETB210 AXQww 2.1V SOT-23 -40oC to +85oC AME8550AEETB210L AXQww 2.1V SOT-23 -40oC to +85oC AME8550AEETB210Z AXQww 2.1V SOT-23 -40oC to +85oC AME8550AEETB210Y AXQww 2.1V SOT-23 -40oC to +85oC 2.1V SOT-89 -40oC to +85oC 2.1V SOT-89 -40oC to +85oC AME8550AEFTB210 AME8550AEFTB210Z A8550A B210ww A8550A B210ww AME8550CEEVB210 AXRww 2.1V SOT-25 -40oC to +85oC AME8550CEEVB210L AXRww 2.1V SOT-25 -40oC to +85oC AME8550CEEVB210Z AXRww 2.1V SOT-25 -40oC to +85oC AME8550CEEVB210Y AXRww 2.1V SOT-25 -40oC to +85oC AME8550AEETA220 AWHww 2.2V SOT-23 -40oC to +85oC AME8550AEETA220L AWHww 2.2V SOT-23 -40oC to +85oC AME8550AEETA220Z AWHww 2.2V SOT-23 -40oC to +85oC AME8550AEETA220Y AWHww 2.2V SOT-23 -40oC to +85oC 2.2V SOT-89 -40oC to +85oC 2.2V SOT-89 -40oC to +85oC AME8550AEFTA220 AME8550AEFTA220Z A8550A A220ww A8550A A220ww AME8550AEITA220 AXKw 2.2V SC70-3 -40oC to +85oC AME8550AEITA220Z AXKw 2.2V SC70-3 -40oC to +85oC 5 AME, Inc. Voltage Detector AME8550 n Ordering Information (contd.) Part Number Marking Output Voltage Package Operating Temp. Range AME8550AEETB240 AXVww 2.4V SOT-23 -40oC to +85oC AME8550AEETB240L AXVww 2.4V SOT-23 -40oC to +85oC AME8550AEETB240Z AXVww 2.4V SOT-23 -40oC to +85oC AME8550AEETB240Y AXVww 2.4V SOT-23 -40oC to +85oC 2.4V SOT-89 -40oC to +85oC 2.4V SOT-89 -40oC to +85oC AME8550AEFTB240 AME8550AEFTB240Z A8550A B240ww A8550A B240ww AME8550CEEVB240 AXWww 2.4V SOT-25 -40oC to +85oC AME8550CEEVB240L AXWww 2.4V SOT-25 -40oC to +85oC AME8550CEEVB240Z AXWww 2.4V SOT-25 -40oC to +85oC AME8550CEEVB240Y AXWww 2.4V SOT-25 -40oC to +85oC AME8550AEEVD240 AXXww 2.4V SOT-25 -40oC to +85oC AME8550AEEVD240L AXXww 2.4V SOT-25 -40oC to +85oC AME8550AEEVD240Z AXXww 2.4V SOT-25 -40oC to +85oC AME8550AEEVD240Y AXXww 2.4V SOT-25 -40oC to +85oC AME8550BEEVD240 AXYww 2.4V SOT-25 -40oC to +85oC AME8550BEEVD240L AXYww 2.4V SOT-25 -40oC to +85oC AME8550BEEVD240Z AXYww 2.4V SOT-25 -40oC to +85oC AME8550BEEVD240Y AXYww 2.4V SOT-25 -40oC to +85oC AME8550AEETB250 AXZww 2.5V SOT-23 -40oC to +85oC AME8550AEETB250L AXZww 2.5V SOT-23 -40oC to +85oC AME8550AEETB250Z AXZww 2.5V SOT-23 -40oC to +85oC AME8550AEETB250Y AXZww 2.5V SOT-23 -40oC to +85oC A8550A 2.5V SOT-89 -40oC to +85oC B250ww A8550A 2.5V SOT-89 AME8550AEFTB250Z -40oC to +85oC B250ww Note: ww represents the date code / w represents date code ( A thru Z ) : 2 work weeks per character. * A line on top of the first letter represents lead free plating such as AME8550 Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type . AME8550AEFTB250 6 AME, Inc. Voltage Detector AME8550 n Ordering Information (contd.) Part Number Marking Output Voltage Package Operating Temp. Range AME8550CEEVB250 AYAww 2.5V SOT-25 -40oC to +85oC AME8550CEEVB250L AYAww 2.5V SOT-25 -40oC to +85oC AME8550CEEVB250Z AYAww 2.5V SOT-25 -40oC to +85oC AME8550CEEVB250Y AYAww 2.5V SOT-25 -40oC to +85oC AME8550AEEVD260 AYVww 2.6V SOT-25 -40oC to +85oC AME8550AEEVD260L AYVww 2.6V SOT-25 -40oC to +85oC AME8550AEEVD260Z AYVww 2.6V SOT-25 -40oC to +85oC AME8550AEEVD260Y AYVww 2.6V SOT-25 -40oC to +85oC AME8550BEEVD260 AYWww 2.6V SOT-25 -40oC to +85oC AME8550BEEVD260L AYWww 2.6V SOT-25 -40oC to +85oC AME8550BEEVD260Z AYWww 2.6V SOT-25 -40oC to +85oC AME8550BEEVD260Y AYWww 2.6V SOT-25 -40oC to +85oC AME8550AEETA270 AWIww 2.7V SOT-23 -40oC to +85oC AME8550AEETA270L AWIww 2.7V SOT-23 -40oC to +85oC AME8550AEETA270Z AWIww 2.7V SOT-23 -40oC to +85oC AME8550AEETA270Y AWIww 2.7V SOT-23 -40oC to +85oC 2.7V SOT-89 -40oC to +85oC 2.7V SOT-89 -40oC to +85oC AME8550AEFTA270 AME8550AEFTA270Z A8550A A270ww A8550A A270ww AME8550AEITA270 AXNw 2.7V SC70-3 -40oC to +85oC AME8550AEITA270Z AXNw 2.7V SC70-3 -40oC to +85oC AME8550AEETB270 AWVww 2.7V SOT-23 -40oC to +85oC AME8550AEETB270L AWVww 2.7V SOT-23 -40oC to +85oC AME8550AEETB270Z AWVww 2.7V SOT-23 -40oC to +85oC AME8550AEETB270Y AWVww 2.7V SOT-23 -40oC to +85oC 2.7V SOT-89 -40oC to +85oC 2.7V SOT-89 -40oC to +85oC AME8550AEFTB270 AME8550AEFTB270Z A8550A B270ww A8550A B270ww 7 AME, Inc. Voltage Detector AME8550 n Ordering Information (contd.) Part Number Marking Output Voltage Package Operating Temp. Range AME8550CEEVB270 AYSww 2.7V SOT-25 -40oC to +85oC AME8550CEEVB270L AYSww 2.7V SOT-25 -40oC to +85oC AME8550CEEVB270Z AYSww 2.7V SOT-25 -40oC to +85oC AME8550CEEVB270Y AYSww 2.7V SOT-25 -40oC to +85oC AME8550AEEVD270 AYXww 2.7V SOT-25 -40oC to +85oC AME8550AEEVD270L AYXww 2.7V SOT-25 -40oC to +85oC AME8550AEEVD270Z AYXww 2.7V SOT-25 -40oC to +85oC AME8550AEEVD270Y AYXww 2.7V SOT-25 -40oC to +85oC AME8550BEEVD270 AYYww 2.7V SOT-25 -40oC to +85oC AME8550BEEVD270L AYYww 2.7V SOT-25 -40oC to +85oC AME8550BEEVD270Z AYYww 2.7V SOT-25 -40oC to +85oC AME8550BEEVD270Y AYYww 2.7V SOT-25 -40oC to +85oC AME8550AEETB280 AYBww 2.8V SOT-23 -40oC to +85oC AME8550AEETB280L AYBww 2.8V SOT-23 -40oC to +85oC AME8550AEETB280Z AYBww 2.8V SOT-23 -40oC to +85oC AME8550AEETB280Y AYBww 2.8V SOT-23 -40oC to +85oC 2.8V SOT-89 -40oC to +85oC 2.8V SOT-89 -40oC to +85oC AME8550AEFTB280 AME8550AEFTB280Z 8 A8550A B280ww A8550A B280ww AME8550CEEVB280 AYCww 2.8V SOT-25 -40oC to +85oC AME8550CEEVB280L AYCww 2.8V SOT-25 -40oC to +85oC AME8550CEEVB280Z AYCww 2.8V SOT-25 -40oC to +85oC AME8550CEEVB280Y AYCww 2.8V SOT-25 -40oC to +85oC AME8550AEEVC290 AYDww 2.9V SOT-25 -40oC to +85oC AME8550AEEVC290L AYDww 2.9V SOT-25 -40oC to +85oC AME8550AEEVC290Z AYDww 2.9V SOT-25 -40oC to +85oC AME8550AEEVC290Y AYDww 2.9V SOT-25 -40oC to +85oC AME, Inc. Voltage Detector AME8550 n Ordering Information (contd.) Part Number Marking Output Voltage Package Operating Temp. Range AME8550BEEVC290 AYEww 2.9V SOT-25 -40oC to +85oC AME8550BEEVC290L AYEww 2.9V SOT-25 -40oC to +85oC AME8550BEEVC290Z AYEww 2.9V SOT-25 -40oC to +85oC AME8550BEEVC290Y AYEww 2.9V SOT-25 -40oC to +85oC AME8550AEETA300 AYFww 3.0V SOT-23 -40oC to +85oC AME8550AEETA300L AYFww 3.0V SOT-23 -40oC to +85oC AME8550AEETA300Z AYFww 3.0V SOT-23 -40oC to +85oC AME8550AEETA300Y AYFww 3.0V SOT-23 -40oC to +85oC 3.0V SOT-89 -40oC to +85oC 3.0V SOT-89 -40oC to +85oC AME8550AEFTA300 AME8550AEFTA300Z A8550A A300ww A8550A A300ww AME8550CEEVA300 AYGww 3.0V SOT-25 -40oC to +85oC AME8550CEEVA300L AYGww 3.0V SOT-25 -40oC to +85oC AME8550CEEVA300Z AYGww 3.0V SOT-25 -40oC to +85oC AME8550CEEVA300Y AYGww 3.0V SOT-25 -40oC to +85oC AME8550AEETB340 AYHww 3.4V SOT-23 -40oC to +85oC AME8550AEETB340L AYHww 3.4V SOT-23 -40oC to +85oC AME8550AEETB340Z AYHww 3.4V SOT-23 -40oC to +85oC AME8550AEETB340Y AYHww 3.4V SOT-23 -40oC to +85oC 3.4V SOT-89 -40oC to +85oC 3.4V SOT-89 -40oC to +85oC AME8550AEFTB340 AME8550AEFTB340Z A8550A B340ww A8550A B340ww AME8550CEEVB340 AYIww 3.4V SOT-25 -40oC to +85oC AME8550CEEVB340L AYIww 3.4V SOT-25 -40oC to +85oC AME8550CEEVB340Z AYIww 3.4V SOT-25 -40oC to +85oC AME8550CEEVB340Y AYIww 3.4V SOT-25 -40oC to +85oC 9 AME, Inc. Voltage Detector AME8550 n Ordering Information (contd.) Part Number Marking Output Voltage Package Operating Temp. Range AME8550AEEVD360 AYJww 3.6V SOT-25 -40oC to +85oC AME8550AEEVD360L AYJww 3.6V SOT-25 -40oC to +85oC AME8550AEEVD360Z AYJww 3.6V SOT-25 -40oC to +85oC AME8550AEEVD360Y AYJww 3.6V SOT-25 -40oC to +85oC AME8550BEEVD360 AYKww 3.6V SOT-25 -40oC to +85oC AME8550BEEVD360L AYKww 3.6V SOT-25 -40oC to +85oC AME8550BEEVD360Z AYKww 3.6V SOT-25 -40oC to +85oC AME8550BEEVD360Y AYKww 3.6V SOT-25 -40oC to +85oC AME8550AEETB440 AYLww 4.4V SOT-23 -40oC to +85oC AME8550AEETB440L AYLww 4.4V SOT-23 -40oC to +85oC AME8550AEETB440Z AYLww 4.4V SOT-23 -40oC to +85oC AME8550AEETB440Y AYLww 4.4V SOT-23 -40oC to +85oC 4.4V SOT-89 -40oC to +85oC 4.4V SOT-89 -40oC to +85oC AME8550AEFTB440 AME8550AEFTB440Z 10 A8550A B440ww A8550A B440ww AME8550CEEVB440 AYMww 4.4V SOT-25 -40oC to +85oC AME8550CEEVB440L AYMww 4.4V SOT-25 -40oC to +85oC AME8550CEEVB440Z AYMww 4.4V SOT-25 -40oC to +85oC AME8550CEEVB440Y AYMww 4.4V SOT-25 -40oC to +85oC AME8550AEEVC460 AYNww 4.6V SOT-25 -40oC to +85oC AME8550AEEVC460L AYNww 4.6V SOT-25 -40oC to +85oC AME8550AEEVC460Z AYNww 4.6V SOT-25 -40oC to +85oC AME8550AEEVC460Y AYNww 4.6V SOT-25 -40oC to +85oC AME8550BEEVC460 AYOww 4.6V SOT-25 -40oC to +85oC AME8550BEEVC460L AYOww 4.6V SOT-25 -40oC to +85oC AME8550BEEVC460Z AYOww 4.6V SOT-25 -40oC to +85oC AME8550BEEVC460Y AYOww 4.6V SOT-25 -40oC to +85oC AME, Inc. Voltage Detector AME8550 n Absolute Maximum Ratings Parameter Symbol Maximum Unit Input Voltage VDD 7 V Output Current IOUT 50 mA CMOS Output Voltage Vss -0.3 to VDD +0.3 V VOUT Nch open drain Vss -0.3 to 7 SOT-23 150 SOT-25 150 SOT-89 500 SC-70 100 Power Dissipation mW Operating Ambient Temperature Range Topr -40 to +85 o C Storage Temperature Range TSTG - 40 to +125 Caution: Stress above the listed absolute rating may cause permanent damage to the device 11 AME, Inc. Voltage Detector AME8550 n Electrical Specifications TA = 25OC, VDF(T)=1.6 to 6.0V + 2% Parameter Detect Voltage Hysteresis Range Supply Current Operating Voltage Test Condition Symbol Min Typ Max Units VDF VDF x0.98 VDF V DF x1.02 V VHY S / VDF 2 8 % ISS V DD =VDF +0.5V VDD 0.9 2.7 2.0 <= V DF < 3.0 1.0 3.0 3.0 <= V DF < 4.0 1.1 3.2 4.0 <= V DF <= 5.0 1.2 3.6 5.0 < V DF <= 6.0 2 4.0 VDF (T)=1.6V to 6.0V Nch Output Current 1.5 < V DF < 2.0 IOUT Pch VDF Topr.V DF Propagation Time tDLY (VDR -->V OUT inversion) Note: VDF(T) : Established Detect Voltage Value Release Voltage : VDR = VDF + VHYS 12 6.5 V VDS=0.5V VDD =1.0V 1.0 2.2 VDD =2.0V 3.0 7.7 VDD =3.0V 5.0 10.1 VDD =4.0V 6.0 11.5 VDD =5.0V 7.0 13.0 mA VDS=2.1V VDD =7V (with CMOS output) Temperature Characteristics 1.2 A -40oC<= Topr<= 85oC -10.0 -2.0 ppm/ oC -100 0.2 ms AME, Inc. Voltage Detector AME8550 n Functional Description (CMOS output without delay) n Functional Description (CMOS output with delay) 1. When input voltage (VDD) rises above detect voltage (VDF), output voltage (VOUT) will be equal to VDD. 1. When input voltage (VDD) rises above detect voltage (VDF), output voltage (VOUT) will be equal to VDD. ( A condition of high impedance exists with Nch open drain output configurations. ) ( A condition of high impedance exists with Nch open drain output configurations. ) 2. When input voltage (VDD) falls below detect voltage (VDF), output voltage (VOUT) will be equal to the ground voltage (VSS) level. 2. When input voltage (VDD) falls below detect voltage (VDF), output voltage (VOUT) will be equal to the ground voltage (VSS) level. 3. When input voltage (VDD) falls to a level below that of the minimum operating voltage (VMIN), output will become unstable. In this condition, VDD will equal the pulled-up output ( should output be pulled-up.) 3. When input voltage (VDD) falls to a level below that of the minimum operating voltage (VMIN), output will become unstable. In this condition, VDD will equal the pulled-up output ( should output be pulled-up.) 4. When input voltage (VDD) rises above the ground voltage (VSS) level, output will be unstable at levels below the minimum operating voltage (VMIN). Between the VMIN and detect release voltage (VDR) levels, theground voltage (VSS) level will be maintained. 4. When input voltage (VDD) rises above the ground voltage (VSS) level, output will be unstable at levels below the minimum operating voltage (VMIN). Between the VMIN and detect release voltage (VDR) levels, theground voltage (VSS) level will be maintained. 5. When input voltage (VDD) rises above detect release voltage (VDR), output voltage (VOUT) will be equal to VDD. 5. When input voltage (VDD) rises above detect release voltage (VDR), output voltage (VOUT) will be equal to VDD after TD delay time. ( A condition of high impedance exists with Nch open drain output configurations. ) 6. The difference between VDR and VDF represents the hysteresis range. Q = V x C = I x TD VxC T= V=VREF I For Example, TD= VREF * 1nF 75nA ( A condition of high impedance exists with Nch open drain output configurations. ) 6. The difference between VDR and VDF represents the hysteresis range. n Timing Chart 6 Input Voltage (VDD) Detect Release Voltage (VDR) Detect Voltage (VDF) n Timing Chart 6 Input Voltage (VDD) Detect Release Voltage (VDR) Detect Voltage (VDF) Min. Operating Voltage (VMIN) Ground Voltage (Vss) Min. Operating Voltage (VMIN) Ground Voltage (Vss) Output Voltage (VOUT) Output Voltage (VOUT) TD Ground Voltage (Vss) 1 2 3 4 5 Ground Voltage (Vss) 1 2 3 4 5 13 AME, Inc. Voltage Detector AME8550 n Notes on Use 1. When a resistor is connected between the VDD pin and the input with CMOS output configurations, oscillation may occur as a result of voltage drops at RIN if load current (IOUT) exists. ( refer to 5 - (1) below ) 2. When a resistor is connected between the VDD pin and the input with CMOS output configurations, irrespective of Nch output configurations, oscillation may occur as a result of through current at the time of voltage release even if load current (IOUT) does not exist.( refer to 5 - (1)(2) below ) 3. With a resistor connected between the VDDpin and the input, detect and release voltage will rise as a result of the IC's supply current flowing through the VDD pin. 4. In order to stabilise the IC's operations, please ensure that VDD pin's input frequency's rise and fall times are more than several sec / V. (2) Oscillation as a result of through current Since the AME8550 series are CMOS IC S, through current will flow when the IC's internal circuit switching operates(during release and detect operations ).Consequently, oscillation is liable to occur as a result of drops in voltage at the through current's resistor (RIN) during release voltage operations. ( refer to diagram 2 ) Since hysteresis exists during detect operations, oscillation is unlikely to occur. Input RIN RINxIOUT voltage drop AME8550 IOUT VOUT VDD 5. Oscillation VSS (1) Output current oscillation with the CMOS output configuration When the voltage applied at IN rises, release operations commence and the detector's output voltage increases. Load current (IOUT) will flow at RL. Because a voltage drop ( RIN x IOUT) is produced at the RIN resistor, located between the input (IN) and the VDD pin, the load current will flow via the IC's VDD pin. The voltage drop will also lead to a fall in the voltage level at the VDD pin. When the VDD pin voltage level falls below the detect voltage level, detect operations will commence. Following detect operations, load current flow will cease and since voltage drop at RIN will disappear, the voltage level at the VDD pin will rise and release operations will begin over again. Oscillation may occur with this " release - detect - release " repetition. Further, this condition will also appear via means of a similar mechanism during detect operations. 14 Diagram1 Input RIN RINxISS* voltage drop AME8550 VOUT VDD VSS Iss* (includes through current) Diagram2 AME, Inc. Voltage Detector AME8550 AME8550-1.9V AME8550-1.9V 14 140 NMOS Sinking Current (mA) NMOS Sinking Current (uA) 160 VDD=0.8V 120 100 80 60 40 VDD=0.7V 20 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 12 10 8 6 4 2 0 0.00 1 0.25 0.50 0.75 VDS (V) NMOS Sinking Current (mA) NMOS Sinking Current (uA) 1.75 150 100 50 VIN=2.5V 35 30 VIN=2.0V 25 20 VIN=1.5V 15 10 VIN=1.0V 5 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0 0.00 1.0 0.50 1.00 1.50 2.00 2.50 3.00 VDS (V) VDS (V) AME8550-4.6V AME8550-4.6V 180 50 VDD=0.8V 140 120 100 80 60 40 VDD=0.7V 20 0.1 0.2 0.3 VIN=4.0V 45 NMOS Sinking Current (mA) 160 NMOS Sinking Current (uA) 1.50 40 200 0 0.0 1.25 AME8550AEETA270 AME8550-2.7V 250 0 0.0 1.00 VDS (V) 0.4 0.5 0.6 VDS (V) 0.7 0.8 0.9 1.0 40 VIN=3.5V VIN=3.0V 35 VIN=2.5V 30 VIN=2.0V 25 20 15 VIN=1.5V 10 5 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 VDS (V) 15 AME, Inc. Voltage Detector AME8550 AME8550-1.9V AME8550-1.9V 9 VDS=2.1V NMOS Sinking Current (mA) PMOS Sourcing Current (mA) 16 14 12 VDS=1.5V 10 VDS=1.0V 8 6 VDS=0.5V 4 2 0 0.0 0.5 8 7 6 5 4 3 2 1 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.0 6.0 0.5 1.0 1.5 2.0 Input Voltage (V) Input Voltage (V) AME8550-2.7V AME8550AEETA270 9 NMOS Sinking Current (mA) PMOS Sourcing Current (mA) 16 VDS=2.1V 14 12 VDS=1.5V 10 8 VDS=1.0V 6 4 VDS=0.5V 8 7 6 5 4 3 2 1 2 0 0.0 0 0.5 1.0 1.5 2.0 2.5 3.0 Input Voltage (V) 6. 5. 5 5 4. 5. 0 3. 5 4. 0 5 2. 3. 0 2. 0 0 1. 5 1. 0. 5 0. 0 0 Input Voltage (V) AME8550-4.6V AME8550-4.6V 16 VDS=2.1V 9 PMOS Sourcing Current (mA) 8 7 6 5 4 3 2 1 VDS=1.5V 10 VDS=1.0V 8 6 VDS=0.5V 4 2 Input Voltage (V) 2 1. 6 2. 0 2. 4 2. 8 3. 2 3. 6 4. 0 4. 4 4. 8 5. 2 5. 6 6. 0 5 8 4 1. 3 4 2 0. 1 0 0 0 16 12 0. 0 14 0. NMOS Sinking Current (mA) 10 Input Voltage (V) AME, Inc. Voltage Detector AME8550 Supply Current vs. Input Voltage (2.7V) Output Voltage vs. Input Voltage (2.2V) 3.0 3.5 3.0 Output Voltage (V) Supply Current (uA) 2.5 2.0 1.5 1.0 0.5 2.5 2.0 VIN down 1.5 VIN up 1.0 0.5 0.0 0.0 0 1 2 3 4 5 Input voltage (V) 0 0.5 1 1.5 2 2.5 3 Input Voltage (V) Output Voltage vs. Input Voltage (2.7V) 3.5 Output Voltage (V) 3.0 2.5 VIN down 2.0 VIN up 1.5 1.0 0.5 0.0 0 0.5 1 1.5 2 2.5 3 Input Voltage (V) 17 AME, Inc. Voltage Detector AME8550 n Package Dimension SOT-23 Top View Side View SYMBOLS D L H E c 1 MAX MIN MAX A 1.00 1.40 0.0394 0.0551 A1 0.00 0.15 0.0000 0.0059 b 0.35 0.50 0.0138 0.0197 C 0.09 0.25 0.0035 0.0098 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 1.90 BSC e H 2.40 3.00 0o 0.09449 0.11811 0.0138BSC 10o 0o 10 o A 1 0.0748 BSC 0.35BSC L Front View INCHES MIN C e MILLIMETERS A1 b TSOT-23 Top View Side View D SYMBOLS E H L C e c 1 MILLIMETERS MIN MAX MIN MAX A+A1 0.80 1.30 0.0315 0.0512 b 0.35 0.50 0.0138 0.0197 C 0.08 0.25 0.0031 0.0098 D 2.70 3.10 0.1063 0.1220 E 1.20 1.80 0.0472 0.0709 1.90 BSC e H 2.40 b 18 A1 A 1 0.0748 BSC 3.00 0.35BSC L Front View INCHES 0 o 10 0.09449 0.11811 0.0138BSC o 0o 10 o AME, Inc. Voltage Detector AME8550 n Package Dimension SOT-25 Top View Side View SYMBOLS D L MIN E H MILLIMETERS c 1 S1 1.20REF A MAX 0.0472REF 0.00 0.15 0.0000 0.0059 b 0.30 0.55 0.0118 0.0217 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 1.90 BSC e 2.60 1 0.07480 BSC 3.00 0.37BSC L Front View MIN A1 H e MAX INCHES 0 o 10 0.10236 0.11811 0.0146BSC o 0o 10o 0.95BSC 0.0374BSC MILLIMETERS INCHES A1 A S1 b TSOT-25 Top View Side View SYMBOLS MIN MAX MIN MAX A+A1 0.90 1.25 0.0354 0.0492 b 0.30 0.50 0.0118 0.0197 c 0.09 0.25 0.0035 0.0098 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 E c 1 S1 H e 1.90 BSC e 2.40 A 1 b S1 3.00 0.35BSC L Front View 0.07480 BSC 0 o 10 0.95BSC 0.09449 0.11811 0.0138BSC o 0o 10o 0.0374BSC A1 H L D 19 AME, Inc. Voltage Detector AME8550 n Package Dimension SOT-89 Side View Top View SYMBOLS D D1 H POLISH A A1 E A1 e Front View MATTE FINISH A POLISH 20 MIN MAX 1.39 1.60 0.8REF INCHES MIN MAX 0.05472 0.06299 0.0315REF C 0.35 0.44 0.01378 0.01732 D 4.39 4.60 0.17283 D1 1.35 1.83 0.05315 0.07205 E 2.28 3.60 0.08976 0.14173 C S1 MILLIMETERS 0.1811 e 3.00REF 0.1181REF H 0.70REF 0.0276REF S1 1.50REF 0.0590REF www.ame.com.tw E-Mail: sales@ame.com.tw Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. AME, Inc. , July 2004 Document: 2051-DS8550-F Corporate Headquarter U.S.A (Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201 Taipei 114, Taiwan, R.O.C. Tel: 886 2 2627-8687 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: 886 2 2659-2989 Fax: (408) 988-2489