ASSP Power Supply Applications Power Management Switch MB384

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ASSP Power Supply Applications Power Management Switch MB384

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DS04-27603-1E
ASSP Power Supply Applications
Power Management Switch
MB3841
DESCRIPTION
FUJITSU MB3841 one-channel power management switch with extremely resistance. MB3841 designed variety switching applications, featuring operation from input voltages (VIN stable resistance that does depend input voltage. switch current limit externally over wide range from safety function detects overcurrent conditions, immediately sets switch mode sends external notification signal. MB3841 therefore ideal power management switching applications with specifications. addition, MB3841 features that ensure accurate on-off switching preventing reverse current mode, well rapid discharge capacitors connected output.
FEATURES
resistance switch (typ. input voltage operation (2.2 Switch current (max. UVLO (VTH External settings soft start time switch current limit On-chip overheating overcurrent detection (output latching) On-chip abnormal state detection circuit (O.C. pin) On-chip output discharge control circuit Supply current standby mode (CONTROL Reverse current protection function mode
PACKAGE
8-pin Plastic
(FPT-8P-M01)
MB3841
ASSIGNMENT
CONTROL
CURRENT
(TOP VIEW)
MB3841
DESCRIPTION
Symbol CONTROL Descriptions Control signal input pin. turn switch turn switch off. less, chip STBY state current consumption less than1µA. Slow start setting pin. Used adjust switch on/off timing. external capacitance delay operation. Leave open when use. open mode voltages present. Care should taken mounting prevent leak current generation because high impedance required. Current limit setting pin. limit current level connecting this external resistance. this connected GND, current limit applied. Switch input pin. voltage monitoring function enables switch operation higher. voltage drops lower switch operation disabled. Switch output pin. discharge function will immediately discharge capacitance charge connected when switch position resistance (with connected terminal. Control power supply input pin. This supplies power control circuit. input voltage level must stable. Ground pin. External signal pin. When switch mode this normally outputs level signal, changes level when overcurrent, overheating, UVLO condition detected. When switch mode this signal output level times. This open drain connection, should pulled high potential using resistance.
CURRENT
MB3841
BLOCK DIAGRAM
Charge pump
load current detection
CURRENT
COMP
Temperature protection
(HYS)
COMP
CONTROL COMP
(HYS)
DISCHARGE
MB3841
ABSOLUTE MAXIMUM RATINGS
Parameter Input voltage Power supply voltage Control voltage Switch current Allowable dissipation Storage temperature Symbol VCTL TSTG Condition +25°C +85°C Rating Max. -0.3 -0.3 -0.3 Min. (DC) +125 Unit
WARNING: Semiconductor devices permanently damaged application stress (voltage, current, temperature, etc.) excess absolute maximum ratings. exceed these ratings.
RECOMMENDED OPERATING CONDITIONS
Parameter Input voltage Power supply voltage Control voltage Switch current capacitance Current limit resistance sync current Operating temperature Symbol VCTL RLIN VCTL Condition Value Min. Typ. Max. Unit
VCTL (ISW (ISW
Note: CSS, RLIN settings, WARNING: recommended operating conditions required order ensure normal operation semiconductor device. device's electrical characteristics warranted when device operated within these ranges. Always semiconductor devices within their recommended operating condition ranges. Operation outside these ranges adversely affect reliability could result device failure. warranty made with respect uses, operating conditions, combinations represented data sheet. Users considering application outside listed conditions advised contact their FUJITSU representatives beforehand.
MB3841
ELECTRICAL CHARACTERISTICS
(VIN +25°C) Parameter Switch resistance disable current Symbol IIN1 IIN2 IIN3 power supply current UVLO threshold UVLO histeresis spread CONTROL input current CONTROL threshold CONTROL histeresis spread ICC1 ICC2 VIUH VIUL VIUHY ICTL VTHCTL VTLCTL VCTLHY ISWLL1 Switch current limit ISWLH1 ISWLL2 ISWLH2 sync current leak current Switch discharge resistance Temperature protection (Tj) rise time fall time IOCS IOCL RDCG TLIM tON1 tON2 tOFF1 tOFF2 Condition VCTL VCTL VCTL VCTL VCTL VCTL O.C. O.C. VIUHY VIUH VIUL VCTL VCTL O.C. VCTL O.C. VCTLHY VTHCTL VTLCTL RLIM VCTL RLIM VCTL RLIM VCTL RLIM VCTL Value Min. 1.57 1.53 +125 Typ. 1.35 1.15 1.97 1.92 Max. 2.37 2.31 1830 Unit
VCTL VCTL VCTL VOUT VCTL OUT: Open OUT: Open OUT: Open OUT: Open
MB3841
DIAGRAM
Normal operation
CONTROL
1.35 1.15
VOUT
tOFF
DISCHARGE logic
Fall
CONTROL
VOUT
DISCHARGE logic
MB3841
VOUT short
CONTROL 1.15
VOUT
Over current latch Latch DISCHARGE logic Latch release
MB3841
TYPICAL CHARACTERISTICS
RLIM Limit Current Characteristics
RLIM
ISW(A)
1000 10000 RLIM 100000
(SS) Characteristics
(msec)
1000 (pF) 10000
MB3841
Resistance Temperature Characteristics
Temperature dependency resistance (VIN lOUT Ambient temperature) resistance
(°C)
voltage dependency resistance (lOUT +25, +100°C) resistance -40°C +25°C +100°C
MB3841
FUNCTIONAL DESCRIPTION
Current Limit Setting
MB3841 provides highly accurate switching current setting, range ±20% (with limit setting current placing resistance between CURRENT pins. Because setting dependent voltage, important that appropriate resistance connected pin. following approximation formula used calculate limit setting when details, "RLIM Limit Current Characteristics" 7450 (RLIM[])1.1
When switch limit level exceeded, switch turns then latch protect device. same time output signal goes level notify external systems. When level signal applied CONTROL switch, latch released, that normal operation resumed next level signal CONTROL switch. Thermal Shutdown MB3841 thermal shutdown function which turns switch sets latch protect device when junction temperature exceeds 125°C. same time output signal goes level notify external systems. When level signal applied CONTROL switch, latch released,so that normal operation resumed next level signal CONTROL switch. Slow Start on/off switching time MB3841 delayed applying capacitance between pins. Controlling time soften surge current load side capacitance when power turned (tON, tOff measured VOUT.) following approximation formula used time when details, "Css (SS) Characteristics" 0.87 10-3 CSS[pF] [msec] DISCHARGE MB3841 DISCHARGE function that immediately discharges electric charge load side when switch turned off.
MB3841
TYPICAL APPLICATION
Pull resistance Control signal CONTROL
RLIM CURRENT
load
MB3841
SAMPLE APPLICATIONS
Supplied (GANG Mode Connection) Supply (Up-board)
controller
MB3841
CONTROL RLIM CURRENT
Pull resistance
Down-port
max/port
MB3841
Self Supplied (NON-GANG Mode Connection)
controller
MB3841 CONTROL Self supply MB3841 CONTROL RLIM CURRENT RLIM CURRENT
Pull resistance
Down-port
Pull resistance
Down-port
MB3841 CONTROL RLIM CURRENT Down-port
Pull resistance
MB3841 CONTROL RLIM CURRENT Down-port Pull resistance
MB3841
USAGE PRECAUTION
Never settings exceeding maximum rated conditions.
Exceeding maximum rated conditions cause permanent damage LSI. Also, recommended that recommended operating conditions observed normal use. Exceeding recommended operating conditions adversely affect reliability.
this device within recommended operating conditions.
Recommended operating conditions values within which normal operation warranted. Standard electrical characteristics warranted within range recommended operating conditions within listed conditions each parameter.
Printed circuit board ground lines should with consideration common impedance. Take appropriate static electricity measures.
Containers semiconductor materials should have anti-static protection made conductive material. After mounting, printed circuit boards should stored shipped conductive bags containers. Work platforms, tools, instruments should properly grounded. Working personnel should grounded with resistance between body ground.
apply negative voltages.
negative voltages below -0.3 create parasitic transistors lines, which cause abnormal operation.
ORDERING INFORMATION
Part number MB3841 PF-G-BND Package 8-pin Plastic (FPT-8P-M01) Remarks
MB3841
PACKAGE DIMENSION
8-pin Plastic (FPT-8P-M01)
2.25(.089)MAX 6.35 -0.20 .250 -.008
+0.25 +.010
0.05(.002)MIN (STAND OFF)
INDEX
5.30±0.30 (.209±.012)
7.80±0.40 (.307±.016)
6.80 -0.20 +.016 .268 -.008
+0.40
1.27(.050) 3.81(.150)REF
0.45±0.10 (.018±.004)
0.15 -0.02 +.002 .006 -.001
+0.05
0.50±0.20 (.020±.008)
Details part 0.20(.008)
0.50(.020) 0.10(.004) 0.18(.007)MAX 0.68(.027)MAX
1994 FUJITSU LIMITED F08002S-4C-4
Dimensions (inches)
MB3841
FUJITSU LIMITED
further information please contact:
Japan FUJITSU LIMITED Corporate Global Business Support Division Electronic Devices KAWASAKI PLANT, 4-1-1, Kamikodanaka Nakahara-ku, Kawasaki-shi Kanagawa 211-8588, Japan Tel: 81(44) 754-3763 Fax: 81(44) 754-3329
Rights Reserved. contents this document subject change without notice. Customers advised consult with FUJITSU sales representatives before ordering. information circuit diagrams this document presented examples semiconductor device applications, intended incorporated devices actual use. Also, FUJITSU unable assume responsibility infringement patent rights other rights third parties arising from this information circuit diagrams. FUJITSU semiconductor devices intended standard applications (computers, office automation other office equipment, industrial, communications, measurement equipment, personal household devices, etc.). CAUTION: Customers considering products special applications where failure abnormal operation directly affect human lives cause physical injury property damage, where extremely high levels reliability demanded (such aerospace systems, atomic energy controls, floor repeaters, vehicle operating controls, medical devices life support, etc.) requested consult with FUJITSU sales representatives before such use. company will responsible damages arising from such without prior approval. semiconductor devices have inherent chance failure. must protect against injury, damage loss from such failures incorporating safety design measures into your facility equipment such redundancy, fire protection, prevention over-current levels other abnormal operating conditions. products described this document represent goods technologies subject certain restrictions export under Foreign Exchange Foreign Trade Japan, prior authorization Japanese government will required export those products from Japan.
http://www.fujitsu.co.jp/
North South America FUJITSU MICROELECTRONICS, INC. Semiconductor Division 3545 North First Street Jose, 95134-1804, Tel: (408) 922-9000 Fax: (408) 922-9179 Customer Response Center Mon. Fri.: (PST) Tel: (800) 866-8608 Fax: (408) 922-9179
http://www.fujitsumicro.com/
Europe FUJITSU MIKROELEKTRONIK GmbH Siebenstein 6-10 D-63303 Dreieich-Buchschlag Germany Tel: (06103) 690-0 Fax: (06103) 690-122
http://www.fujitsu-ede.com/
Asia Pacific FUJITSU MICROELECTRONICS ASIA #05-08, Lorong Chuan Tech Park Singapore 556741 Tel: (65) 281-0770 Fax: (65) 281-0220
http://www.fmap.com.sg/
F9809 FUJITSU LIMITED Printed Japan

ASSP Power Supply Applications Power Management Switch MB384

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