Very Dropout/ Ultra Noise Outputs Voltage Regulator MC33765 ultra
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MC33765
Very Dropout/ Ultra Noise Outputs Voltage Regulator
MC33765 ultra noise, very dropout voltage regulator with five independent outputs which available TSSOP surface mount package. MC33765 available output voltage same five outputs each output capable supplying different currents output device features very dropout voltage (0.11 typical maximum output current), very quiescent current (5.0 maximum mode, typical mode) output (output exhibits very noise level which allows driving noise sensitive circuitry. Internal current thermal limiting protections provided. Additionally, MC33765 independent Enable input each output. includes also common Enable shutdown complete circuit when used. Common Enable highest priority over five independent Enable input pins. voltage regulators VR1, have common input voltage VCC1. other voltage regulators have common input voltage VCC2. Five Independent Outputs 2.8V Typical, based upon voltage version Internal Trimmed Voltage Reference Vout Tolerance ±3.0% over Temperature Range -40°C +85°C Enable Input (Logic-Controlled Shutdown) Each Five Outputs Common Enable Shutdown Whole Circuit Very Dropout Voltage (0.11 Typical Output 0.17 Typical Output Maximum Current) Very Quiescent Current (Maximum Mode, Typical Mode) Ultra Noise Max, kHz) Internal Current Thermal Limit VR1, VR2, Stability Supply Voltage Rejection: (Typical)
TSSOP-16 SUFFIX CASE 948F MC33 ALYW
Assembly Location Wafer Year Work Week
CONNECTIONS
Bypass Common Enable On/Off V-Reg. On/Off V-Reg. On/Off V-Reg. On/Off V-Reg. On/Off V-Reg. (Top View) Connected VCC1 Output V-Reg. Output V-Reg. Output V-Reg. Output V-Reg. VCC2 Output V-Reg.
ORDERING INFORMATION
Device MC33765DTB MC33765DTBR2 Package TSSOP16 TSSOP16 Shipping Units/Rail 2500 Units/Reel
Semiconductor Components Industries, LLC, 2000
April, 2000 Rev.
Publication Order Number: MC33765/D
MC33765
MC33765
Simplified Block Diagram
VCC1 (15) (10) VCC2 Common Enable ON/OFF Enable BYPASS Voltage Reference 1.25 Temp. Shut. (14) VOUT1 Current Limit VCC1
ON/OFF Enable
Current Limit
VCC1
(13) Temp. Shut. VOUT2
ON/OFF Enable Temp. Shut. (12) VOUT3 Current Limit VCC1
ON/OFF Enable
Current Limit
VCC2
(11) Temp. Shut. VOUT4
ON/OFF Enable
Current Limit
VCC2
Temp. Shut. VOUT5
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MC33765
MAXIMUM RATINGS
Rating Power Supply Voltage Symbol RqJA Value Unit
Thermal Resistance Junction-to-Air Operating Ambient Temperature °C/W Maximum Operating Junction Temperature Maximum Junction Temperature Storage Temperature Range TJmax Tstg +150
CONTROL ELECTRICAL CHARACTERISTICS
ELECTRICAL CHARACTERISTICS (For typical values 25°C, min/max values -40°C +85°C/ 125°C)
Characteristics Symbol Unit
Independent Enable Pins
Control Input Impedance Logic "0", i.e. State Logic "1", i.e. State VON/OFF(1-5)
Input Voltage Range
VON/OFF(1-5)
Common Enable
Input Voltage Range
Control Input Impedance Logic "0", i.e. State Logic "1", i.e. State
ELECTRICAL CHARACTERISTICS (For typical values 25°C, min/max values -40°C +85°C/ 125°C)
Characteristics Symbol
Unit
Current Consumption Logic complete device, i.e. Common Enable Independent Enable pins State IQOFF
CURRENT CONSUMPTION with LOAD
Current Consumption Logic complete device, i.e. Common Enable Independents Enable pins State Current Consumption Logic "1", Common Enable State Independents Enable pins State
IQON1 IQON2
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MC33765
REGULATOR ELECTRICAL CHARACTERISTICS
ELECTRICAL CHARACTERISTICS (For typical values 25°C, min/max values -40°C +85°C/ 125°C)
Characteristics Symbol Unit
Supply Output Voltages, Dropout Load Regulation
Supply Voltage MC33765 (2.8V) VCC1, VCC2 VOUT(1-5) VCC-VOUT VCC-VOUT4 Regload(1-5) 0.11 0.17 2.85 0.17 0.30 Regulator Output Voltage VR1, VR2, VR3, MC33765 (2.8V) Dropout Voltage VR1, VR2, VR3, (Note Dropout Voltage (Note Load Regulation 25°C)
Power Dissipation Total Output Current (VR1 VR5) (Note
Power Dissipation 85°C) Max. Total Output Current 85°C) Power Dissipation 25°C) Max. Total Output Current 25°C) Pdmax IRMS Pdmax IRMS IOUT1 IOUT2 IOUT3 IOUT4 IOUT5 IMAX
Output Currents (Note
Regulator Output Current Regulator Output Current Regulator Output Current Regulator Output Current Regulator Output Current Current Limit VR1, VR2, VR3, VR4, [Twice Output Current each output] IOUT (1-5)
External Capacitors
External Compensation Capacitors VR1, VR2, VR4, External Compensation Capacitors External Compensation Capacitors C(1-2, 4-5) 0.10 0.05
Ripple Rejections
Ripple Rejection VR1, VR2, VR4, Max. Current, kHz, Ripple Rejection VR1, VR2, VR4, Max. Current, kHz, Ripple Rejection Max. Current, kHz, Ripple Rejection Max. Current, kHz, Ripple Rejection Max. Current, kHz,
Typical dropout voltages have been measured currents: Output1: Output2: Output3: Output4: Output5: Maximum value dropout voltages measured maximum specified current. package power dissipation thermal protection. Maximum Output Currents peak values. Total current have upon maximum power dissipation specification. Only Output been designed stable minimum current
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MC33765
REGULATOR ELECTRICAL CHARACTERISTICS
ELECTRICAL CHARACTERISTICS (For typical values 25°C, min/max values -40°C +85°C/Max 125°C)
Characteristics Symbol Unit
Dynamic Parameters
Rise Time 99%) Common Enable state, Cbypass Iout max. current VR1, VR2, VR4, with COUT 25°C with COUT 25°C Fall Time (99% [COUT IOUT (Note Overshoot (COUT VR1, VR2, VR4, COUT VR3) 25°C Common Enable state, independent enable from state Settling Time ±0.1% nominal) 25°C Common Enable state, independent enable from state toff
Noise Crosstalks
Noise Voltage (100 kHz) with Cbypass VR1, VR2, VR4, with COUT with COUT Static crosstalk shift) between Regulator Output, 25°C (Note Dynamic CrossTalk Attenuation between Regulator Outputs kHz), 25°C (Note
Thermal Shutdown
Thermal Shutdown Fall time highly dependent load conditions, i.e. load current specified value COUT. Static Crosstalk shift caused switching outputs through independent enable other outputs. This parameter highly dependent overall layout requires implementation low-noise GROUND rules (e.g. Ground plane). Dynamic crosstalk ratio between forced output signal signal transferred other outputs. This requires special device configuration measured.
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MC33765
MC33765 TYPICAL OSCILLOSCOPE SHOTS
100ms/div 1V/div 60µV/div 4.0V 23°C
Enable Out4
5µs/div 500mV/div 500mV/div 3.8V 23°C
Out3
Vout5
Figure Crosstalk response MC33765 showing extremely weak interaction between outputs Output banged from 150mA
Figure Repetitive Common Enable response time
500µs/div 500mV/div 500mV/div 3.8V 23°C
Out3
Vout5 Enable
Vout5
5µs/div 500mV/div 500mV/div 3.8V 23°C
Figure Single Common Enable response time (Cbypass discharged)
Figure Output response from seperate Enable
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MC33765
Vout4
Vout5
500µs/div 10mV/div 3.8V 23°C
500µs/div 10mV/div 3.8V 23°C
Figure Output banged from 150mA
Figure Output banged from 50mA
Vout2 200µs/div 2V/div 10mV/div variable 23°C 200µs/div 2V/div 10mV/div variable 23°C Vout3
Figure Typical input voltage rejection (Cout 100nF)
Figure Typical input voltage rejection (Cout 1µF)
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MC33765
DROPOUT VOLTAGE (mV) OUTPUT CURRENT (mA) OUT1 OUT2 OUT3 OUT5 OUT4 GROUND CURRENT (mA) OUT3 OUT1 OUT5 OUT4 OUT2
TEMPERATURE (°C)
Figure Dropout Voltage versus Output Current
Figure Ground Current versus Individual Output
MAXIMUM OUTPUT CURRENT (mA) OUT2 OUT1 OUT5 OUT3 DROPOUT VOLTAGE (mV) OUT4
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure Maximum Output Current versus Temperature
Figure Dropout Voltage versus Operating Temperature: OUT1
DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV)
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure Dropout Voltage versus Operating Temperature: OUT2
Figure Dropout Voltage versus Operating Temperature: OUT3
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MC33765
DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure Dropout Voltage versus Operating Temperature: OUT4
Figure Dropout Voltage versus Operating Temperature: OUT5
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MC33765
DEFINITIONS Load Regulation change output voltage change load current constant chip temperature. Dropout Voltage input/output differential which regulator output longer maintains regulation against further reductions input voltage. Measured when output drops below nominal value (which measured differential input/output), dropout voltage affected junction temperature, load current minimum input supply requirements. Output Noise Voltage voltage output with constant load input ripple, measured over specified frequency range.
MC33765 Output noise performances nV/sqrt(Hz) period 1000 10000 100000 1000000 Frequency (Hz) OUT3 OUT1, 3.6V Iout typical Cbyp 10nF
device switched ON/OFF through independent Enable (ON/OFF pin) Common Enable, output signal could example, square wave. Let's assume that device during signal period current will given
where
Depending ambient temperature, possible calculate maximum power dissipation maximum current following:
maximum operating junction temperature specified 125°C, 25°C, then neglecting quiescent current, maximum power dissipation expressed
Maximum Power Dissipation maximum total dissipation which regulator will operate within specifications. Quiescent Current Current which used operate regulator chip with load current. Line Regulation change input voltage change input voltage. measurement made under conditions dissipation using pulse techniques such that average chip temperature significantly affected. Thermal Protection Internal thermal shutdown circuitry provided protect integrated circuit event that maximum junction temperature exceeded. When activated, typically 160°C, regulator turns off. This feature provided prevent catastrophic failures from accidental overheating. Maximum Package Power Dissipation Current maximum package power dissipation power dissipation level which junction temperature reaches maximum value i.e. 125°C. junction temperature rising while difference between input power (VCC ICC) output power (Vout Iout) increasing. MC33765 device exhibits five independent outputs Iout specified maximum current combination five output currents.
Vout
that more drastic conditions: Vout then maximum value Iout maximum power dissipation supported device increased when using appropriate application design. Mounting configuration PCB, board material also ambient temperature affected rate temperature rise. means that when good thermal conductivity through PCB, junction temperature will "low" even power dissipation great. thermal resistance whole circuit evaluated deliberately activating thermal shutdown circuit increasing output current raising input voltage example). Then calculate power dissipation subtracting output power from input power. variables then well known: power dissipation, thermal shutdown temperature (160°C MC33765) ambient temperature.
TJP-
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MC33765
DESIGN HINTS Reducing cross-talk between MC33765 outputs origin shift finds seat layout surrounding integrated circuit. Particular care taken when routing output ground paths. Star grounding ground plane absolute conditions reduce noise shift associated common impedance situations, depicted Figure
Load1 common impedance shift Rlayout Load2
WRONG
Load1 Star cabling Load2
CORRECT
MC33765
Figure Star Cabling Avoids Coupling Common Ground Impedance
first left cabling will generate voltage shift which will superimpose output voltages, thus creating undesirable offset. routing return grounds single
impedance point, naturally shield circuit against common impedance disturbances. Figure portraits text fixture implemented test response MC33765.
10nF
470nF
MC33765
MC33765
Output
Output 100nF
Figure Shift Text Fixture
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MC33765
DESIGN HINTS (cont.) Output banged from 150mA dedicated control pin, while output fixed 50mA monitored. circuit been implemented equipped with ground plane routed with short copper traces. results shown hereafter, revealing excellent behavior MC33765 when crosstalks outputs utmost importance.
output
output
Figure 62.5µV/div, 200Hz
Figure 1mV/div
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MC33765
TECHNICAL TERMS Rise Time Common Enable being state, device switched ON/OFF control. Let's call time when ON/OFF signal reaches nominal value. Let's call time when output signal reaches nominal value. rise time this device specified
Fall Time fall time highly dependent output capacitor device design impacting this parameter.
Overshoot, Settling Time regulators based regulation loop through error amplifier, this type device requires certain time stabilize reach nominal value. overshoot defined voltage difference between peak voltage steady state when switching regulator. settling time equal time required regulator stabilize nominal value (±0.5%) after peak value when switching regulator.
Settling Time Rise Time Overshoot Vnom Output Voltage
Chip Enable ON/OFF signal
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MC33765
PACKAGE DIMENSIONS
TSSOP-16 SUFFIX CASE 948F-01 ISSUE
0.10 (0.004) 0.15 (0.006)
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSION DOES INCLUDE MOLD FLASH. PROTRUSIONS GATE BURRS. MOLD FLASH GATE BURRS SHALL EXCEED 0.15 (0.006) SIDE. DIMENSION DOES INCLUDE INTERLEAD FLASH PROTRUSION. INTERLEAD FLASH PROTRUSION SHALL EXCEED 0.25 (0.010) SIDE. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.08 (0.003) TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION. TERMINAL NUMBERS SHOWN REFERENCE ONLY. DIMENSION DETERMINED DATUM PLANE -W-. MILLIMETERS 4.90 5.10 4.30 4.50 1.20 0.05 0.15 0.50 0.75 0.65 0.18 0.28 0.09 0.20 0.09 0.16 0.19 0.30 0.19 0.25 6.40 INCHES 0.193 0.200 0.169 0.177 0.047 0.002 0.006 0.020 0.030 0.026 0.007 0.011 0.004 0.008 0.004 0.006 0.007 0.012 0.007 0.010 0.252
IDENT.
SECTION
0.25 (0.010) 0.15 (0.006)
DETAIL
0.10 (0.004) SEATING
PLANE
DETAIL
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MC33765
Notes
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MC33765
Semiconductor trademarks Semiconductor Components Industries, (SCILLC). SCILLC reserves right make changes without further notice products herein. SCILLC makes warranty, representation guarantee regarding suitability products particular purpose, does SCILLC assume liability arising application product circuit, specifically disclaims liability, including without limitation special, consequential incidental damages. "Typical" parameters which provided SCILLC data sheets and/or specifications vary different applications actual performance vary over time. operating parameters, including "Typicals" must validated each customer application customer's technical experts. SCILLC does convey license under patent rights rights others. SCILLC products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure SCILLC product could create situation where personal injury death occur. Should Buyer purchase SCILLC products such unintended unauthorized application, Buyer shall indemnify hold SCILLC officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that SCILLC negligent regarding design manufacture part. SCILLC Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
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MC33765/D
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