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| FUJITSU SEMICONDUCTOR DATA SHEET DS04-27201-4E ASSP For Power Supply Applications Switching Regulator Controller MB3776A s DESCRIPTION MB3776A is a PWM system switching regulator controller. Because of its low operating supply voltage and powerdown, the MB3776A is ideal for use in DC/DC converters for battery-powered portable equipment. s FEATURES * * * * * * Wide supply voltage range: (2 V to 15 V) Wide oscillation frequency range, high-frequency oscillation: (10 kHz to 500 kHz) Push-pull output. Drive current set with external resistor Bulit-in idle period circuit Internally set error amplifier gain, few external components Bulit-in power-down function s PACKAGES 8-pin Plastic DIP 8-pin Plastic SOP 8-pin Plastic SOP 8-pin Plastic SSOP (DIP-8P-M01) (FPT-8P-M01) (FPT-8P-M02) (FPT-8P-M03) MB3776A s PIN ASSIGNMENT (TOP VIEW) -IN 1 8 FB CLT 2 7 OSC VCC 3 6 GND IB 4 5 OUT (DIP-8P-M01) (FPT-8P-M01) (FPT-8P-M02) (FPT-8P-M03) 2 MB3776A s BLOCK DIAGRAM VCC 3 OSC 7 IS IB 0.6 V CTL 2 Reference voltage 1.25 V Internal bias & reference voltage Error Amp. 0.1 V 0.1 V Saw-tooth waveform Is 30 k 5 OUT P. W. M. Comp -IN 1 X 100 36 k + + 470 Output drive control 4 IB + 0.5 V D. T. C. ( 0.6 V) FB 8 6 GND 3 MB3776A s ABSOLUTE MAXIMUM RATINGS (Ta = +25C) Parameter Power supply voltage Error amp. input voltage Output source current Output sink current Symbol VCC VI ISOURCE ISINK Condition -- -- -- -- Ta +25C (DIP) Power dissipation PD Ta +25C (SOP) EIAJ JEDEC Rating Min -- -0.3 -- -- -- -- -- -- -30 -55 Max 16 +10 -50 50 550 *570 *430 *580 +75 +125 Unit V V mA mA mW mW mW mW C C Ta < +25C (SSOP) Operating temperature Storage temperature Top Tstg -- -- *: The packages are mounted on the epoxy board (10 cm x 10 cm x 1.5 mm) WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. s RECOMMENDED OPERATING CONDITIONS Parameter Power supply voltage Error amp. input voltage Output source current Output sink current Phase compensation capacitor Timing capacitor Timing resistor Oscillator frequency Operating temperature Symbol VCC VI ISOURCE ISINK CP CT RT fOSC TOP Value Min 2.0 -0.2 -40 -- -- 100 1.0 10 -30 Typ -- -- -- -- 0.1 1000 3.0 200 25 Max 15 1.0 -- 40 -- 10000 5.0 500 75 Unit V V mA mA F pF k kHz C WARNING: The recommended operating conditions are required in order to ensure the normal operation of the semiconductor device. All of the device's electrical characteristics are warranted when the device is operated within these ranges. Always use semiconductor devices within their recommended operating condition ranges. Operation outside these ranges may adversely affect reliability and could result in device failure. No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their FUJITSU representatives beforehand. 4 MB3776A s ELECTRICAL CHARACTERISTICS 1. Reference Section and Error Amp. Section (Ta = +25C, VCC = 3 V) Parameter Input threshold voltage VT input stability VT temp. stability Input bias current Voltage gain Frequency band width Symbol VT VTdV1 VTdV2 VTdT IB AV BW AV = 0 dB Condition VFB = 450 mV VCC = 2.0 V to 6.0 V VCC = 6.0 V to 15 V Ta = -30 C to +75 C VIN = 0 V to 0.6 V -- Value Min 487 -5 -5 -3 -1.0 70 -- Typ 507 -- -- -- -0.2 100 6 Max 527 5 5 3 1.0 145 -- Unit mV mV mV % A V/V MHz 2. Saw-tooth Waveform Oscillator Section (Ta = +25C, VCC = 3 V) Parameter Oscillator frequency Frequency input stability Frequency temp. stability Symbol fOSC fdV fdT Condition RT = 3.0 k CT = 1000 pF VCC = 2.0 V to 15 V Ta = -30C to +75C Value Min 160 -- -- Typ 200 2 10 Max 240 -- -- Unit kHz % % 3. Under Lockout Protection (Ta = +25C, VCC = 3 V) Parameter Threshold voltage Symbol VTH Condition -- Value Min -- Typ 1.4 Max -- Unit V 4. Dead-time Control Section (Ta = +25C, VCC = 3 V) Parameter Symbol Condition CT = 1000 pF RT = 3.0 k VFB = 0.9 V Value Min 60 Typ 70 Max 85 Unit Max duty cycle tDUTY % 5 MB3776A 5. Output Section (Ta = +25C, VCC = 3 V) Parameter Output source current Output sink current High-level output voltage Output voltage Symbol ISOURCE ISINK VOH VOL Condition RB = 820 , VO = 1 V RB = 820 , VO = 0.3 V RB = 820 , VO = 7 V IO = -15 mA VCTL = VCC, IO = 3 A Value Min -40 30 5.5 -- Typ -30 60 6.0 0.1 Max -20 -- -- 0.2 Unit mA mA V V 6. Control Section (Ta = +25C, VCC = 3 V) Parameter Input off condition Input on condition Control terminal current Symbol IOFF ION ICTL Condition -- -- VCC = 7 V, VCTL = 0 V Value Min -300 -- -1.3 Typ -- -- -1 Max -- -700 -- Unit A A mA 7. All Device (Ta = +25C, VCC = 3 V) Parameter Stand by current Average supply current Symbol ICCS ICC Condition VCTL = VCC or CTL terminal open ICTL = -700 A RB = 820 Value Min -- -- Typ -- 4.5 Max 0.5 8 Unit A mA 6 MB3776A s MEASURMENT CIRCUIT CP MB3776A TEST INPUT CTL VCC = 3 V 1 2 3 4 8 7 6 5 ISOURCE RB CT RT OUTPUT CT = 1000 pF CP = 0.1 F RT = 3 k RB =820 ISOURCE 25000/RB (mA) s DIAGRAM FB Terminal Waveform Saw-tooth Waveform Output 0V Output Terminal Waveform 0 mA CTL Input Current ICTL Power Supply Voltage VCC 0V 7 MB3776A s TYPICAL CHARACTERISTIC Output bias current vs. Output source current -50 -40 -30 -20 -10 0 0 VCC = 2 V Ta = +25C Output bias current vs. Output bias voltage 1.0 Output bias voltage VB (V) Output source current ISOURCE (mA) VCC = 2 V Ta = +25C 0.8 0.6 0.4 0.2 0 -100 -200 -300 -400 -500 -600 -700 Output bias current IB (mA) 0 -100 -200 -300 -400 -500 -600 -700 Output bias current IB (mA) "L" Level output 200 "L" Level output voltage VO (mV) "H" Level output 2.0 VCC = 2 V RB = 820 Ta = +25C VCC = 2 V RB = 820 Ta = +25C 100 "H" Level output voltage VO (V) 1.0 0 0 2 4 6 8 10 12 14 16 18 20 "L" Level output current IO (mA) 0.0 0 -6 -12 -18 -24 -30 "H" Level output current IO (mA) Ambient temp. vs. Oscillator frequency 210 200 190 180 170 160 150 VCC = 2 V RB = 820 CT = 1000 pF RT = 3 k Timing resistor vs. Oscillator frequency 2M 1M VCC = 3 V RB = 820 Ta = +25C Oscillator frequency fOSC (kHz) Oscillator frequency fOSC (Hz) 500 k 100 k 50 k CT = 1000 pF 10 k 5k CT = 10000 pF CT = 100 pF -30 -20 0 20 40 60 75 Ambient temp. Ta (C) 1k 1k 5 k 10 k 50 k 100 k Timing resistor RT () 500 k (Continued) 8 MB3776A (Continued) Control terminal voltage vs. Control terminal current -1.0 Control terminal current ICTL (mA) VCC = 2 V Ta = +25C Control terminal voltage vs. Control terminal current -1.0 Control terminal current ICTL (mA) VCC = 7 V Ta = +25C -0.5 -0.5 0 0.0 0.4 0.8 1.2 1.6 Control terminal voltage VCTL (V) 2.0 0 0 2 4 6 8 10 Control terminal voltage VCTL (V) Power supply voltage vs. Input on voltage 10 Ta = +25C 8 Inpurt on current VCTL (V) 6 4 2 0 0 2 4 6 8 10 Power supply voltage VCC (V) 9 MB3776A s APPLICATION EXAMPLE 18 k 10 H VIN (+3 V) 4.7 F + + 10 F 1 2 3 2 k 4 820 5 8 + CTL 7 3 k 6 1000 pF 0.1 F 10 H 10 F + + 10 H VO+ (+5 V) 10 F - - - - - 10 F VO- (-5 V) Synchronization To synchronize MB3776A controllers, the OSC terminal of each IC is shared and the same specified capacitor and resistor used on a signal IC application is connected for self-excitation oscillation. The CTL terminal controls power on/off of each IC. OUT 1 CT RT MB3776A OUT 2 MB3776A MB3776A OUT 3 VCC 10 MB3776A s NOTES ON USE * Take account of common impedance when designing the earth line on a printed wiring board. * Take measures against static electricity. - For semiconductors, use antistatic or conductive containers. - When storing or carrying a printed circuit board after chip mounting, put it in a conductive bag or container. - The work table, tools and measuring instruments must be grounded. - The worker must put on a grounding device containing 250 k to 1 M resistors in series. * Do not apply a negative voltage - Applying a negative voltage of -0.3 V or less to an LSI may generate a parasitic transistor, resulting in malfunction. s ORDERING INFORMATION Part number MB3776A-P MB3776APF MB3776APNF MB3776APFV Package 8-pin Plastic DIP (DIP-8P-M01) 8-pin Plastic SOP (FPT-8P-M01) 8-pin Plastic SOP (FPT-8P-M02) 8-pin Plastic SSOP (FPT-8P-M03) Remarks 11 MB3776A s PACKAGE DIMENSIONS 8-pin Plastic DIP (DIP-8P-M01) 9.40 -0.30 +0.40 +.016 .370 -.012 1 PIN INDEX 6.200.25 (.244.010) 4.36(.172)MAX 0.51(.020)MIN 0.250.05 (.010.002) 3.00(.118)MIN 0.460.08 (.018.003) 15MAX 0.99 -0 +0.30 +.012 1.52 -0 +0.30 +.012 .039 -0 +0.35 0.89 -0.30 .060 -0 7.62(.300) TYP .035 -.012 +.014 2.54(.100) TYP C 1994 FUJITSU LIMITED D08006S-2C-3 Dimensions in mm (inches) . Note : The values in parentheses are reference values. (Continued) 12 MB3776A (Continued) 8-pin Plastic SOP (FPT-8P-M01) Note 1) *1 : These dimensions include resin protrusion. Note 2) *2 : These dimensions do not include resin protrusion. Note 3) Pins width and pins thickness include plating thickness. Note 4) Pins width do not include tie bar cutting remainder. +0.25 +.010 *1 6.35 -0.20 .250 -.008 8 0.17 -0.04 .007 -.002 +0.03 +.001 5 INDEX *2 5.300.30 7.800.40 (.209.012) (.307.016) Details of "A" part 2.00 -0.15 .079 -.006 1 4 +0.25 +.010 (Mounting height) "A" 0.13(.005) 0.25(.010) 0~8 1.27(.050) 0.470.08 (.019.003) M 0.500.20 (.020.008) 0.600.15 (.024.006) 0.10 -0.05 +0.10 +.004 .004 -.002 (Stand off) 0.10(.004) C 2002 FUJITSU LIMITED F08002S-c-6-7 Dimensions in mm (inches) . Note : The values in parentheses are reference values. (Continued) 13 MB3776A 8-pin Plastic SOP (FPT-8P-M02) Note 1) *1 : These dimensions include resin protrusion. Note 2) *2 : These dimensions do not include resin protrusion. Note 3) Pins width and pins thickness include plating thickness. Note 4) Pins width do not include tie bar cutting remainder. +0.25 +.010 *1 5.05 -0.20 .199 -.008 8 0.22 -0.07 .009 -.003 5 +0.03 +.001 *2 3.900.30 6.000.40 (.154.012) (.236.016) Details of "A" part 45 1.550.20 (Mounting height) (.061.008) 0.25(.010) 0.40(.016) 1 4 "A" 0~8 1.27(.050) 0.440.08 (.017.003) 0.13(.005) M 0.500.20 (.020.008) 0.600.15 (.024.006) 0.150.10 (.006.004) (Stand off) 0.10(.004) C 2002 FUJITSU LIMITED F08004S-c-4-7 Dimensions in mm (inches) . Note : The values in parentheses are reference values. (Continued) 14 MB3776A (Continued) 8-pin Plastic SSOP (FPT-8P-M03) Note 1) *1 : These dimensions include resin protrusion. Note 2) *2 : These dimensions do not include resin protrusion. Note 3) Pins width and pins thickness include plating thickness. Note 4) Pins width do not include tie bar cutting remainder. 0.17 -0.04 .007 -.002 +0.03 +.001 *1 3.500.10(.138.004) 8 5 *2 4.200.10 INDEX 6.200.20 (.165.004) (.244.008) Details of "A" part 1.25 -0.10 .049 -.004 +0.20 +.008 (Mounting height) 0.25(.010) "A" 1 4 0~8 0.80(.031) 0.370.08 (.015.003) 0.10(.004) M 0.500.20 (.020.008) 0.600.15 (.024.006) 0.100.10 (.004.004) (Stand off) 0.10(.004) C 2002 FUJITSU LIMITED F08005S-c-3-5 Dimensions in mm (inches) . Note : The values in parentheses are reference values. 15 MB3776A FUJITSU LIMITED All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information, such as descriptions of function and application circuit examples, in this document are presented solely for the purpose of reference to show examples of operations and uses of Fujitsu semiconductor device; Fujitsu does not warrant proper operation of the device with respect to use based on such information. When you develop equipment incorporating the device based on such information, you must assume any responsibility arising out of such use of the information. Fujitsu assumes no liability for any damages whatsoever arising out of the use of the information. Any information in this document, including descriptions of function and schematic diagrams, shall not be construed as license of the use or exercise of any intellectual property right, such as patent right or copyright, or any other right of Fujitsu or any third party or does Fujitsu warrant non-infringement of any third-party's intellectual property right or other right by using such information. Fujitsu assumes no liability for any infringement of the intellectual property rights or other rights of third parties which would result from the use of information contained herein. The products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for use accompanying fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for use requiring extremely high reliability (i.e., submersible repeater and artificial satellite). Please note that Fujitsu will not be liable against you and/or any third party for any claims or damages arising in connection with above-mentioned uses of the products. Any semiconductor devices have an inherent chance of failure. You must protect against injury, damage or loss from such failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and prevention of over-current levels and other abnormal operating conditions. If any products described in this document represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Law of Japan, the prior authorization by Japanese government will be required for export of those products from Japan. F0309 (c) FUJITSU LIMITED Printed in Japan |
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