MB3883PFV

Manufacturer Part NumberMB3883PFV
Description6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down
ManufacturerFUJITSU [Fujitsu Component Limited.]
MB3883PFV datasheet
 


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FUJITSU SEMICONDUCTOR
DATA SHEET
ASSP For Power Management Applications
-ch DC/DC Converter IC with Synchronous
6
Rectifier for Voltage Step-up and Step-down
MB3883
DESCRIPTION
The MB3883 is a 6-channel step-up/step-down DC/DC converter IC using pulse width modulation (PWM) and
synchronous rectification, designed for low voltage, high efficiency, and compact size. This IC is ideal for up
conversion, down conversion, and up/down conversion (using a step-up/step-down Zeta system with free input
and output settings).
The MB3883 can operate at low voltage levels, and has a wide supply voltage range from 1.7 V to 9 V.
The MB3883 is available in two packages, an LQFP-48P or a leadless BCC-48P formed with a contact electrode
pad only.
This is an ideal power supply for high-performance portable devices such as digital still cameras.
FEATURES
• Supports synchronous rectification (CH1, 2, 5)
• Supports for down-conversion and up/down Zeta conversion (CH1, 2)
Supports for up-conversion (CH5)
• Supports up-conversion (CH3, 4, 6)
• Low start-up voltage
• Power supply voltage range
• Built-in high-precision reference voltage circuit
• Wide operating oscillator frequency range with high-frequency capability : 100 kHz to 1 MHz
• Error amplifier output for soft start (CH1 to CH6)
• Totem-pole type output switch control circuit
PACKAGES
48-pin plastic LQFP
(FPT-48P-M05)
DS04-27225-2E
: 1.7 V (CH6)
: 2.4 V to 9 V (CH6)
: 3.6 V to 9 V (CH1 to CH5)
: 1 %
48-pad plastic BCC
(LCC-48P-M02)

MB3883PFV Summary of contents

  • Page 1

    FUJITSU SEMICONDUCTOR DATA SHEET ASSP For Power Management Applications -ch DC/DC Converter IC with Synchronous 6 Rectifier for Voltage Step-up and Step-down MB3883 DESCRIPTION The MB3883 is a 6-channel step-up/step-down DC/DC converter IC using pulse width modulation (PWM) and synchronous ...

  • Page 2

    MB3883 PIN ASSIGNMENTS SWOUT 1 SWIN 2 FB6 3 IN6 4 C IN6 5 DTC5 6 FB5 7 IN5 OUT ( FB4 11 IN4 12 (CH4) 2 (TOP VIEW) Output block Control block ...

  • Page 3

    SWOUT 1 SWIN 2 FB6 3 IN6 4 C IN6 5 DTC5 6 FB5 7 IN5 OUT ( FB4 11 IN4 (CH4) (TOP VIEW) Output block Control block ...

  • Page 4

    MB3883 PIN DESCRIPTION Pin No. Symbol 35 FB1 34 IN1 CH1 36 DTC1 37 OUT1-1 38 OUT1-2 32 FB2 31 IN2 CH2 33 DTC2 39 OUT2-1 40 OUT2-2 29 FB3 28 IN3 CH3 30 DTC3 41 OUT3 11 FB4 12 ...

  • Page 5

    Pin No. Symbol 25 RT OSC SWOUT 2 SWIN 20 CTL 21 CTL1 CTL3 Control 23 CTL4 24 CTL5 18 CSCP VCC 42 VCC (O) Power 16 VREF 17 ...

  • Page 6

    MB3883 BLOCK DIAGRAM FB1 DTC1 FB2 DTC2 FB3 DTC3 IN (A) 4 OUT (A) 4 FB4 IN (S) 4 DTC4 FB5 DTC5 FB6 C IN6 CTL1, 2 CTL3 CTL4 CTL5 6 PWM 42 VCC (O) CH1 Comp. 1-1 35 Drive ...

  • Page 7

    Block diagram (Expansion 1/2) FB1 35 IN1 34 DTC1 36 FB2 32 IN2 31 DTC2 33 FB3 29 IN3 28 DTC3 OUT ( FB4 11 IN4 DTC4 ...

  • Page 8

    MB3883 • Block diagram (Expansion 2/2) FB5 7 IN5 8 1.25 V 1.0 V DTC5 6 FB6 3 ( IN6 4 37.5 k 62 IN6 5 0.9 V CTL1 CTL3 22 ...

  • Page 9

    ABSOLUTE MAXIMUM RATINGS Parameter Symbol V CC Power supply voltage I O Output current I O Output peak current P D Power dissipation Storage temperature Tstg * : The packages are mounted on the epoxy board (10 cm WARNING: Semiconductor ...

  • Page 10

    MB3883 RECOMMENDED OPERATING CONDITIONS Parameter Startup power supply voltage Power supply voltage Reference voltage output current VB pin output current Input voltage Control input voltage Output current Output current setting resister Oscillator frequency Timing capacitor Timing resistor Soft-start capacitor Short ...

  • Page 11

    ELECTRICAL CHARACTERISTICS Parameter Symbol Reference V REF voltage Output voltage V REF temperature /V REF stability Input stability Line Load stability Load Short-circuit I OS output current Threshold V TH voltage Hysteresis V H width Reset voltage V RST Threshold ...

  • Page 12

    MB3883 Parameter Threshold voltage V temperature T stability Input bias current Voltage gain Frequency bandwidth Output voltage Output source current Output sink current Threshold voltage V temperature T stability Input bias current Voltage gain Frequency bandwidth Output voltage Output source ...

  • Page 13

    Parameter Symbol Threshold voltage V Input bias current Threshold voltage V V Threshold voltage V Input current I DTC V Threshold voltage V Tmax Maximum duty cycle Dtr Output source I SOURCE current Output sink current I SINK R Output ...

  • Page 14

    MB3883 (Continued) Parameter Symbol SW input voltage Input current Output source I current Output sink current Output ON resistor CTL input voltage Input current Standby current I Power supply current *: Standard design value. 14 Pin No. Conditions V 5 ...

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    TYPICAL CHARACTERISTICS Power supply current vs. power supply voltage CTL CTL1, 2 CTL3 CTL4 Power supply voltage V Reference voltage vs. ambient temperature 2.56 VCC 5 V ...

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    MB3883 Triangular wave upper and lower limit voltage vs. triangular wave oscillator frequency 0.9 VCC 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 200 400 600 Triangular wave oscillator ...

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    Error amplifier gain and phase vs. frequency (CH1 100 k Frequency f (Hz) Error amplifier gain and phase vs. frequency (CH6 ...

  • Page 18

    MB3883 FUNCTIONS 1. DC-DC Converter Functions (1) Reference voltage block The reference voltage circuit generates a temperature-compensated reference voltage (typically : = 2.49 V) from the voltage supplied from the power supply terminal (pin 19). The voltage is used as ...

  • Page 19

    Channel Control Function Channels are turned on and off depending on the voltage levels at the CTL terminal (pin 20), CTL1, 2 terminal (pin 21), CTL3 terminal (pin 22), CTL4 terminal (pin 23), and CTL5 terminal (pin 24). Voltage ...

  • Page 20

    MB3883 4. Soft Start Operation 1. Description • When the CTL, CTL1,2, CTL3, CTL4, and CTL5 terminals are driven high (“H” level) at the same time The capacitor (C+IN6) connected to the C+IN6 terminal (pin 5) starts charging. When the ...

  • Page 21

    After a CH6 soft start, when the CTL1, 2, CTL3, CTL4, and CTL5 terminals are driven high The capacitor (Cs) connected to the CS terminal (pin 15) starts charging and the error amp provides a soft start by comparing ...

  • Page 22

    MB3883 2. Soft Start Settings • CH6 soft start time The soft start operation is determined by the capacitor (C+IN6) connected to the C+IN6 terminal (pin 5). The soft start time depends on the input voltage and load current. CH6 ...

  • Page 23

    SETTING THE OUTPUT VOLTAGE • CH1 to CH3, CH5 V O FB1 IN1 R2 • CH4 ( OUT ( FB4 R3 12 IN4 1. (R1 ...

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    MB3883 • CH6 V O FB6 R1 IN6 R2 C IN6 Error ( Amp.6 4 37.5 k 1. 1.26 V (R1 R2 ...

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    SETTING THE OUTPUT CURRENT The output circuit (drive 6) is structured as illustrated below (in the output circuit diagram). As found in “Output Current Waveform” below, the source current value of the output current waveform has a constant current setting. ...

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    MB3883 SETTING TIME CONSTANT FOR TIMER-LATCH SHORT-CIRCUIT PROTECTION CIRCUIT The short detection comparator (SCP comparator) in each channel monitors the output voltage. While the switching regulator load conditions are stable on all channels, the LOG_SCP output remains at “H” level, ...

  • Page 27

    TREATMENT WITHOUT USING CSCP When not using the timer-latch short protection circuit, connect the CSCP terminal (pin 18) to GND with the shortest distance. Treatment without using CSCP OPERATING WITHOUT THE SOFT START FUNCTION To disable the CH1 to CH5 ...

  • Page 28

    MB3883 SETTING THE DEAD TIME When the device is set for step-up inverted output based on the step-up or step-up/down Zeta method or flyback method, the FB pin voltage may reach and exceed the rectangular wave voltage due to load ...

  • Page 29

    TREATMENT WITHOUT USING CH4 INV Amp. When not using the CH4 INV Amp., connect the -IN(A)4 terminal (pin 9) to the OUT(A)4 terminal (pin 10) with the shortest distance. 9 IN(A)4 10 OUT(A)4 Treatment without using CH4 INV Amp. MB3883 ...

  • Page 30

    MB3883 APPLICATION EXAMPLE A FB1 R12 35 C23 2.7 k 0.1 F R13 IN1 R14 15 k R15 DTC1 R16 47 k FB2 B C24 32 0.1 F R17 15 k ...

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    Application example (Expansion1/2) A FB1 R12 35 C23 2.7 k 0.1 F R13 IN1 R14 15 k R15 DTC1 R16 47 k FB2 B C24 32 0.1 F R17 15 ...

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    MB3883 • Application example (Expansion 2/2) FB5 F R32 7 C27 15 k 0.1 F R33 R10 IN5 R34 15 k R35 DTC5 R36 FB6 3 R37 C28 15 ...

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    PARTS LIST COMPONENT ITEM Q1, Q2 PNP Q6, Q8 FET Q9, Q10, Q12 FET Q7, Q11 NPN Tr D1, D2, D8, D9 Diode Diode L1, L5 Coil Coil ...

  • Page 34

    MB3883 REFERENCE DATA Conversion efficiency vs. load current (CH1 : Zeta method with synchronous rectification 100 150 200 250 300 350 400 450 500 Load current IL ...

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    Conversion efficiency vs. load current (CH5 : Up conversion method with synchronous rectification) 100 output 99 VCC VCC( Vin = 2.5 V Vin = ...

  • Page 36

    ... Working personnel should be grounded with resistance of 250 k • Do not apply negative voltages. The use of negative voltages below –0.3 V may create parasitic transistors on LSI lines, which can cause abnormal operation. ORDERING INFORMATION Part number MB3883PFV MB3883PV between body and ground. Package 48-pin plastic LQFP ...

  • Page 37

    PACKAGE DIMENSIONS 48-pin plastic LQFP (FPT-48P-M05) 9.00±0.20(.354±.008)SQ 7.00±0.10(.276±.004) INDEX 48 LEAD No 0.50(.020) 0.20±0.05 (.008±.002) 2000 FUJITSU LIMITED F48013S-c-4-8 C Note : Pins width and pins thickness include plating thickness. 0.145±0.055 (.006±.002) 24 Details of ...

  • Page 38

    MB3883 (Continued) 48-pin plastic BCC (LCC-48P-M02) 7.00±0.10(.276±.004 0.05(.002) 1998 FUJITSU LIMITED C48055SC-1 6.15(.242)TYP 5.00(.197)TYP (0.80(.031)MAX) 0.50(.020) (Total height) TYP 25 25 0.085±0.040 (.003±.002) (Stand off) 7.00±0.10 6.20(.244) (.276±.004) TYP 13 13 6.20(.244)TYP Details of "A" ...

  • Page 39

    MB3883 FUJITSU LIMITED For further information please contact: Japan FUJITSU LIMITED Corporate Global Business Support Division Electronic Devices Shinjuku Dai-Ichi Seimei Bldg. 7-1, Nishishinjuku 2-chome, Shinjuku-ku, Tokyo 163-0721, Japan Tel: +81-3-5322-3347 Fax: +81-3-5322-3386 http://edevice.fujitsu.com/ North and South America FUJITSU MICROELECTRONICS, ...