MC33765 ON Semiconductor, MC33765 Datasheet
MC33765
Available stocks
Related parts for MC33765
MC33765 Summary of contents
Page 1
... The MC33765 is an ultra low noise, very low dropout voltage regulator with five independent outputs which is available in TSSOP 16 surface mount package. The MC33765 is available in 2.8 V. The output voltage is the same for all five outputs but each output is capable of supplying different currents up to 150 mA for output 4. The device features a very low dropout voltage (0 ...
Page 2
... ON/OFF 1 Enable 1.25 V Voltage BYPASS Reference 100 nF (4) ON/OFF 2 Enable (5) ON/OFF 3 Enable (6) ON/OFF 4 Enable (7) ON/OFF 5 Enable (8) GND http://onsemi.com MC33765 (2) (10) Common Enable Current Limit – + Temp. Shut. Current Limit – + Temp. Shut. Current Limit – ...
Page 3
... Common Enable and All Independent Enable pins at OFF State Current Consumption at Logic “1” for the complete device, i.e. Common Enable and All Independents Enable pins at ON State Current Consumption at Logic “1”, Common Enable at ON State and All Independents Enable pins at OFF State MC33765 Symbol Pin # ...
Page 4
... Maximum Output Currents are peak values. Total DC current have to be set upon maximum power dissipation specification. Only Output 3 has been designed to be stable at minimum current of 0 mA. MC33765 Symbol Pin # MC33765 (2.8V) V CC1, V CC2 15 OUT(1–5) 14, 13, 12, MC33765 (2.8V) 11 –V OUT 14, 13, 12 –V OUT4 11 Reg load(1–5) 9, 11, 12, 13, 14 ...
Page 5
... Static Crosstalk shift caused by switching ON one of the outputs through independent enable to all other outputs. This parameter is highly dependent on overall PCB layout and requires the implementation of low–noise GROUND rules (e.g. Ground plane). 6. Dynamic crosstalk is the ratio between a forced output signal to signal transferred to other outputs. This requires special device configuration to be measured. MC33765 Symbol Min t on – ...
Page 6
... MC33765 TYPICAL OSCILLOSCOPE SHOTS Enable of X: 100ms/div Out4 Y1: 1V/div Y2: 60 V/div Vin = 4. Vout5 Figure 1. Crosstalk response of MC33765 showing extremely weak interaction between outputs Output 4 is banged from 0 to 150mA X: 500 s/div Y1: 500mV/div CE Y2: 500mV/div Vin = 3. Figure 3. Single Common Enable response time ...
Page 7
... Figure 5. Output 4 is banged from 3mA to 150mA Vin Vout2 X: 200 s/div Y1: 2V/div Y2: 10mV/div Vin = variable Figure 7. Typical input voltage rejection (Cout = 100nF) MC33765 Y1 Vout5 X: 500 s/div Y1: 10mV/div Vin = 3. Figure 6. Output 5 is banged from 3mA to 50mA 200 s/div ...
Page 8
... Figure 11. Maximum Output Current versus Temperature 160 140 120 100 –60 –40 – TEMPERATURE ( C) Figure 13. Dropout Voltage versus Operating Temperature: OUT2 MC33765 8.0 OUT4 7.0 OUT5 6.0 OUT2 5.0 4.0 OUT3 3.0 2.0 OUT1 OUT5 1.0 0 120 140 160 –60 –40 –20 Figure 10. Ground Current versus Individual Output ...
Page 9
... TEMPERATURE ( C) Figure 15. Dropout Voltage versus Operating Temperature: OUT4 MC33765 160 140 120 100 100 –60 –40 –20 Figure 16. Dropout Voltage versus Operating Temperature: OUT5 http://onsemi ...
Page 10
... Then you can calculate the power dissipation by subtracting the output power from the input power. All variables are then well known: power dissipation, thermal shutdown temperature (160 C for MC33765) and ambient temperature http://onsemi.com ...
Page 11
... Star cabling Load1 Load2 low impedance point, you naturally shield the circuit against common impedance disturbances. Figure 18 portraits the text fixture implemented to test the response of the MC33765 10k 10k 470nF ...
Page 12
... Figure 19. Vin = 4V 62.5 V/div 200Hz MC33765 DESIGN HINTS (cont.) ground plane and routed with short copper traces. The results are shown hereafter, revealing the excellent behavior of the MC33765 when crosstalks outputs is at utmost importance. Figure 20. Vin = 5V 1mV/div http://onsemi.com 12 Y1, output 3 ...
Page 13
... Rise Time Vnom OFF 1% MC33765 TECHNICAL TERMS Overshoot, Settling Time – As regulators are based on regulation loop through an error amplifier, this type of device requires a certain time to stabilize and reach its nominal value. ...
Page 14
... L PIN 1 IDENT. 1 0.15 (0.006 –V– C 0.10 (0.004) –T– SEATING D G PLANE MC33765 PACKAGE DIMENSIONS TSSOP–16 DTB SUFFIX CASE 948F–01 ISSUE É É É Ç Ç Ç Ç Ç Ç É É É ...
Page 15
... Notes MC33765 http://onsemi.com 15 ...
Page 16
... Email: ONlit–asia@hibbertco.com JAPAN: ON Semiconductor, Japan Customer Focus Center 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–8549 Phone: 81–3–5740–2745 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 16 MC33765/D ...