A4804 AITSEMI | Alldatasheet
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AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 1 - DESCRIPTION FEATURES A4804 is a series of high precision voltage detector with ultra low current consumption (500nA typ. at VDD = 3.0V). It can work at very low voltage, which makes it perfect for system reset. A4804 is composed of high precision voltage reference, comparator, output driver and resistor array. Internally preset detect voltage has a low temperature drift and requires no external trimming. N-channel open-drain is available. A4804 is available in SOT-23 package.
ORDERING INFORMATION
XX: Output Voltage 30=3.0V N: N-channel open drain V: Halogen free Package R: Tape & Reel AiT provides all RoHS products Suffix “ V “ means Halogen free Package High-precision detection Voltage: ±3% Detection Voltage: 0.9V~6.0V (in 0.1V step) Precise hysteresis: 4% typ. Operating Voltage range: 0.7V~10V Ultra-low current consumption: 500nA typ. (at VDD＝3.0V) Available in SOT-23 package APPLICATION Power monitor for portable equipment such as PDA, DSC, Mobile phone,Notebook,MP3 CPU and Logic Circuit Reset Battery Checker Battery Back-up Circuit Power Failure Detector TYPICAL APPLICATION
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 2 - PIN DESCRIPTION Top View Pin # Symbol Function
1 VDD Voltage input pin
2 VOUT Voltage detection output pin
3 VSS Ground Pin
Input Voltage -0.3V ~ 10V Output Voltage Range -0.3V ~ 12V Maximum Output Current 70mA TA, Ambient Temperature -40°C ~ 85°C PD, Power Dissipation SOT-23 250mW TS, Storage Temperature Range -40°C ~ 150°C Lead Temperature & Time 260°C,10s Stresses beyond 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 Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED WORK CONDITIONS Parameter Min Recommended Max Unit Input Voltage Range 0.7 - 10 V Ambient Temperature -40 25 85 °C
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 3 -
ELECTRICAL CHARACTERISTICS
TOPT＝25℃, Unless otherwise specified. Parameter Symbol Conditions Min Typ. Max Unit Detector Threshold -VDET 3.0V 2.91 3.00 3.09 V Detector Threshold Hysteresis VHYS 3.0V 0.06 0.12 0.18 V Current Consumption ISS VDD = 5.0V 3.0V - 0.50 2.50 uA Maximum Operating Voltage VDDH - - 10 V Minimum Operating Voltage VDDL - 0.5 - V Output Delay Time TPLH - - 20 us
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 4 - TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage VS. Input Voltage 1. Detector threshold = 3.0V (-40°C) 2. Detector threshold = 3.0V (25°C) 3. Detector threshold = 3.0V (70°C) Supply current VS. Input voltage 4. Detector threshold = 3.0V
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 5 - Detector Threshold Hysteresis VS. Temperature 5. Detector threshold = 3.0V Driver Output Current VS. VDS 6. A4804E3R-30N Driver Output Current vs. Input Voltage 7. Detector threshold = 3.0V
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 6 - BLOCK DIAGRAM
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 7 - DETAILED INFORMATION In A4804, a high precision low temperature coefficient reference voltage is applied to the negative input of a comparator. Input voltage, divided by resistor array of Ra, Rb and Rc, is applied to the positive input of the comparator. Output of the comparator controls a pair of NMOS and PMO S switches, generating the hysteresis. Output of the comparator passes a series of buffer to drive the output NMOS.
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 8 - OUTPUT ACTION No. Operation status Output status I VDD >- VDET Output voltage is equal to the supply voltage II VDD drops below - VDET Output voltage equals to GND level III VDD drops further below VDDL Output voltage is undefined IV VDD rises above VDDL Output voltage equals to GND level V VDD rises above + VDET Output voltage equals to supply voltage, VHYS = (+VDET) - (-VDET)
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 9 -
PACKAGE INFORMATION
Dimension in SOT-23 Package (Unit: mm)
AiT Semiconductor Inc. www.ait-ic.com A4804 SUPERVISOR (RESET IC) HIGH-PRECISION N-CH LOW VOL TAGE DETECTOR REV1.3 - JUL 2011 RELEASED, DEC 2015 UPDATED - - 10 - IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its pr oduct, specifications, to discontinue any integrated circuit product or service without not ice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. AiT Semiconductor Inc. 's integrated circuit products are not designed, intended, author ized, or warranted to be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of death, personal injury, or servere property, or environmental damage. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc . assumes to no liability to customer product design or application support. AiT warrants the performance of its products of the specifications applicable at the time of sale.